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Panasonic AG-DV2500P Service Manual

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ORDER NO. BSD0303M901
D21
DV VIDEO CASSETTE RECORDER
AG-DV2500P / AG-DV2500E
Please refer to the Operating Instructions in the appendix
folder. /
(Go to Appendix List)
1

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  • Page 1 ORDER NO. BSD0303M901 DV VIDEO CASSETTE RECORDER AG-DV2500P / AG-DV2500E Please refer to the Operating Instructions in the appendix folder. / (Go to Appendix List)
  • Page 3 SAFETY PRECAUTIONS GENERAL GUIDELINES 1. When servicing, observe the original lead dress. If a short / circuit is found, replace all parts which have been over-heated or damaged by the short circuit. 2. After servicing, see to it that all the protective devices such as insulation barriers, insulation papers shields are properly installed.
  • Page 4 Figure1 LEAKAGE CURRENT HOT CHECK (See Figure 1) 1. Plug the AC cord directly into the AC outlet. / Do not use an isolation transformer for this check. 2. Connect a 1.5k , 10W resistor, in parallel with a 0.15 capacitor, between each exposed metallic part on the set an a good earth ground such as a water pipe, as shown in Figure1.
  • Page 5 Typically the melting point is 50-70°F (30-40°C) higher. Please use a high temperature soldering iron. In case of the soldering iron with temperature control, please set it to 700±20°F (370±10°C ). 2. Pb free solder will tend to splash when heated too high (about 1100°F /600°C ).
  • Page 6 conductive material). 7. Immediately before removing the protective material from the leads of a replacement ES device, touch the protective material to the chassis or circuit assembly into which the device will be installed. / CAUTION : Be sure no power is applied to the chassis or circuit, and observe all other safety precautions.
  • Page 8 1. Service Information 2. Mechanical Adjustments 3. Electrical Adjustments...
  • Page 9 4. Technical Description 5. Block Diagrams/Schematic Diagrams/Circuit Board Diagrams NOTE BE SURE TO MAKE YOUR ORDERS OF REPLACEMENT PARTS ACCORDING TO PARTS LIST. CAUTION MARK INDICATES THE PRIMARY CIRCUIT TO DISTINGUISH THE PRIMARY FROM THE SECONDARY CIRCUIT. / PAY ATTENTION NOT TO RECEIVE AN ELECTRIC SHOCK DURING REPAIR SERVICE OF THE PRODUCTS.
  • Page 10 5.12. MDA/DC SCHEMATIC DIAGRAM 5.13. FDM (FRONT, DV CONN & MIC) SCHEMATIC DIAGRAMS 5.14. FDM (FRONT, DV CONN & MIC) CIRCUIT BOARDS 5.15. MECHA & MECHA CONN SCHEMATIC DIAGRAMS 5.16. MECHA & MECHA CONN CIRCUIT BOARDS 5.17. IC BLOCK DIAGRAMS 6.
  • Page 11 NOTE: 1. Be sure to make your orders of replacement parts according to this list. 2. Unless otherwise specified, all resistors are in OHMS, K=1,000 OHMS, all capacitors are in MICROFARADS F), P= 3. The P.C. Board unit marked with " "...
  • Page 12 SECTION 1 SERVICE INFORMATION CONSTRUCTION OF THE MAIN BOARD DV/CPU BOARD MECHA CONN BOARD ASSEMBLY ASSEMBLY 1 4 MDA/DC BOARD MAIN BOARD ASSEMBLY ASSEMBLY FRONT BOARD ASSEMBLY DV CONN BOARD ASSEMBLY MIC BOARD ASSEMBLY DV/CPU BOARD ASSEMBLY MDA/DC BOARD ASSEMBLY MECHA BOARD ASSEMBLY MECHA CONN BOARD ASSEMBLY MECHA BOARD...
  • Page 13 HOW TO REMOVE THE OUTER COVER 1.2.3 Front panel (1) Remove the top and bottom covers 1.2.1 Top cover (2) Remove the front panel while releasing the four hooks (1) Remove the four screws (2) Remove the top cover while lifting the rear part of it. TOP COVER Hook Hook...
  • Page 14 HOW TO EXAMINE THE BOARDS 1.4.2 MDA/DC board assembly (1) Remove the top cover to examine the A-side. 1.4.1 MAIN board assembly (2) To examine the B-side, pull down the main board as shown (1) Remove the bottom cover to examine the B-side of the main in Fig.
  • Page 15 1.4.4 FRONT board assembly (1) Remove the front panel to examine the front board. Mechanism unit (2) Remove the screw , and pull the board down to examine the B-side. CN4002 CN4003 FRONT board assembly Fig. 1.4.4 HOW TO REMOVE THE MECHANISM UNIT Fig.
  • Page 16 HOW TO REMOVE THE MECHANISM ASSEMBLY To remove only the mechanism assembly from the mechanism unit. (1) Remove the shield case on the DV/CPU board and remove the CN107 FPC wire from the drum assembly. CN107 To: CN117 To: CN114 MDA/DC board To: CN119 MDA/DC board...
  • Page 17 HOW TO TAKE OUT THE CASSETTE TAPE IN CASE OF EMERGENCY An emergency system on this unit enables the cassette tape to be taken out manually. When a cassette tape is stuck, take it out as described below. Procedure Å 1.
  • Page 18 SERVICE MENU 1.8.1 How to display the Service Menu In no cassette condition, by pressing the MENU button for 2 seconds or longer while keeping either the REC or PLAY button pressed, the first tier of the Service Menu will be displayed on the video monitor . As shown in Table 1.8.1, the Service Menu content that is displayed will dif fer depending on which buttons you press together simultaneously.
  • Page 19 1.8.3 VTR 1 menu Item Parameter REC REPEAT No repeat recording Repeat recording 2 times Repeat recording 12 times Full repeat recording FOOT SW LEVEL LEVEL1 Possible from any mode LEVEL2 Possible only from STOP or REC PAUSE mode MIC REC CH NORMAL Record input signal from connected MIC only on CH2 (CH4 : during A.DUB mode) CH1-MIX...
  • Page 20 1.8.5 DIP switch menu Sets the DIP SW. (All status are set to “OFF” or “0” when shipped.) Item Parameter Default setting at factory DIP SW 1/3 DIP SW – 0 1: Displays error rate monitor and CPU port information DIP SW –...
  • Page 21 1.8.6 HOUR METER menu Displays and resets the various types of hour meters. When the parameter is set to “CLEAR” and the SET button is pressed, the hour meter is cleared. Time duration/number of Item Parameter times display is possible DRUM Time display H Displays the drum hour meter (for drum maintenance) 000000~999999...
  • Page 22 1.8.7 ERROR HISTORY menu It can display 4 errors that have occurred in the past. Initially, when there is no error history in the memory, the first error to occur will be logged in the first position (HISTORY-1). The second and third errors to occur will be logged in (HISTORY-2) and (HISTORY-3).
  • Page 23 Item Content Displayed Content P.TM POWER HOUR METER Power hour meter is display. SYS MODE SYSCON CPU mode when error occurred SFF/SREW parameter is speed display. PLAY (03, 00) (Refer to Fig. 1.8.7 (2) Speed parameter) Parameters of other modes are irrelevant. MODE DATA Parameter EJECT (01) : Eject...
  • Page 24 Item Content Displayed Content MCV/SPD Loading/cassette housing control voltage [00-FF] : 0—8V (Displays mode motor control voltage (when error code 4xxx and error code 3xxx during error code 3xxx ) is displayed.) [00-FF] : 0-11V (Displays cassette motor control voltage during error code 4xxx) Tape speed (When the code excepting [00-FA] : 0—25X...
  • Page 25 (2) Error code description Error code Display Content of occurrence Method of detection Detected signal 0201 CONDENSATION ON DRUM DEW detected If DEW sensor detects IC302 (MSD) –detects condensation voltage of pin 318 3200 LOADING FAILURE Does not load If mechanism position does IC302-pin354 not move in loading direction Rotary encoder output is...
  • Page 26 1.8.8 OTHERS menu Item Parameter Standard setting MEMORY SW LOAD START Menu SW information is loaded from a store aria. MEMORY SW Standard setting SAVE START Menu SW information is saved to a store aria. CANCEL Standard setting ALL RESET I,U,E,EC Resets all EEP-ROM data to default settings except adjustment data, hour meter data, and IEEE1394 ID data.
  • Page 27 1.8.9 CPU version menu Displays version of SYSCON CPU and MSD (VCR) CPU. – – – M E N U – – – V T R 1 . . E X I T Firmware version C P U V E R S I O N SYSCON PLSL1144-VX-XX CPU version...
  • Page 28 Setting procedure (1) Press the 8 or 9 button to move the cursor to MEM. EDIT. (2) Press the : button to make the ADR parameter blink. (3) Press the 8 or 9 button to select ADR parameter “391”. (4) Press the : button to make the DATA parameter blink. (5) Press the 8 or 9 button to set ADR = “391”...
  • Page 29 SERVICING FIXTURES & TOOLS...
  • Page 30 MECHANISM PARTS ASSEMBLY MECHA CONN BOARD ASSEMBL Apply the screw lock Apply the screw lock Apply the screw lock Red marking Apply the screw lock Fold to shaft of No.24 Bottom side Bottom side MECHA BOARD ASSEMBL Bottom side Bottom side...
  • Page 31 MECHANISM PARTS ASSEMBLY Ref.No. Part No. Part Name & Description Remarks Ref.No. Part No. Part Name & Description Remarks QSD0006-001 DEW SENSOR LL30247-001A MECHANISM ASS'Y LL30275-001A SUP P.BASE ASSY LL20081-001A TAPE GUARD LL30277-001A SUP P.B.PLATE WJT0085-001A WIRE LL40284-001A G.ROLLER ASS'Y LL40370-001A P.ARM F.ASS'Y LL30278-001A...
  • Page 32 CABINET PARTS ASSEMBLY Components identified with the mark have the special characteristics for safety. When replacing any of these components, use only the same type. Note) Valley fold Electrode surface Plate V/CPU BOARD ASSEMBL From Head cleaner From From Mode Motor Drum CONN BO ASSEMBLY...
  • Page 33 CABINET PARTS ASSEMBLY Ref.No. Part No. Part Name & Description Remarks Ref.No. Part No. Part Name & Description Remarks LL30318-001A CENTER BRACKET LL20089-001A SIDE FRAME (L) LL20090-001A SIDE FRAME (R) LL30319-001A FRONT BRACKET LL40366-001A BRACKET LL40363-001A KNOB LL20092-003A BOTTOM COVER LL20092-004A TOP COVER LL40390-003A...
  • Page 34 PACKING PARTS ASSEMBLY Components identified with the mark have the special characteristics for safety. When replacing any of these components, use only the same type. PRT-5...
  • Page 35 PACKING PARTS ASSEMBLY Ref.No. Part No. Part Name & Description Remarks Ref.No. Part No. Part Name & Description Remarks LLT029-001A OPERATING INSTRUCTIONS 1 FOR AG-DV2500P LLT030-001A OPERATING INSTRUCTIONS 1 FOR AG-DV2500E QPB02403404 POLYETHYLENE BAG LL10073-001A STAND SS45331 FOOT LL40373-001A QPA01502005...
  • Page 36 5.7 MAIN SCHEMATIC DIAGRAM 1/6 NTSC -1.5 -2.1 -0.2 -4.9 -4.9 Composite ( CPS ) NTSC CPS Y -1.2 -4.9 -1.8 -8.4 -4.9 Y/C SEP NTSC -0.8 -0.2 -1.4 -0.2 -0.4 -0.7 -0.8 -0.2 CPS C -0.8 -0.1 -0.7 -0.9 -0.8 -8.4 NTSC...
  • Page 37 MAIN SCHEMATIC DIAGRAM 2/6 TP206 TP206 NTSC TP205 TP205 NTSC Y/C Y -0.1 -0.2 CPS Y SEP Y Y/C C -1.6 -0.4 -0.2 -0.2 -0.2 -1.0 -1.4 -2.0 -1.7 -0.9 -2.1 CPS C -4.9 SEP C ENC C ENC Y TP207 TP207 NTSC...
  • Page 38 MAIN SCHEMATIC DIAGRAM 3/6 (Page 5-25) (3.0) (1.5) (3.0) -8.4 AUD 2/4 -8.4 -7.4 -7.4 -8.4 AUD 1/3 -8.4 AUD 1/3 AUD 2/4 -8.4...
  • Page 39 MAIN SCHEMATIC DIAGRAM 4/6...
  • Page 40 MAIN SCHEMATIC DIAGRAM 5/6 IMPORTANT SAFETY NOTICE: COMPONENTS IDENTIFIED WITH THE MARK HAVE THE SPECIAL CHARACTERISTICS FOR SAFETY. WHEN REPLACING ANY OF THESE COMPONENTS, USE ONLY THE SAME TYPE. 12.0 11.1 11.1 11.8 10.1 12.0 10.1 10.0 11.1 11.2 11.3 12.0 11.9 12.0...
  • Page 41 MAIN SCHEMATIC DIAGRAM 6/6 (Page 5-16) (Page 5-16, 5-18)
  • Page 42 5.12 MDA/DC SCHEMATIC DIAGRAM 1/4 MECHA CONN CN112 (Page 5-27)
  • Page 43 MDA/DC SCHEMATIC DIAGRAM 2/4 CN105 (Page 5-18) CN116 (Page 5-27)
  • Page 44 MDA/DC SCHEMATIC DIAGRAM 3/4 IMPORTANT SAFETY NOTICE: COMPONENTS IDENTIFIED WITH THE MARK HAVE THE SPECIAL CHARACTERISTICS FOR SAFETY. WHEN REPLACING ANY OF THESE COMPONENTS, USE ONLY THE SAME TYPE. FROM MAIN CN3001 ( Page 5-11 )
  • Page 45 MDA/DC SCHEMATIC DIAGRAM 4/4 CN108 ( Page 5-18 )
  • Page 46 SECTION 2 MECHANICAL ADJUSTMENTS BEFORE ADJUSTMENTS 2.1.1 Precautions 2.1.2 Measuring instruments required for adjustments 1) Be sure to apply a screw securing torque when attaching a Instrument Condition part. Oscilloscope Calibrated instrument with measuring The securing torque should be 0.14 N/m (1.4 kgf/cm) unless bandwidth of 100 MHz or more.
  • Page 47 DISASSEMBLY/ASSEMBLY OF THE MECHANISM 2.2.1 Mechanism position for disassembly/assembly 2.2.2 Mode transition The mechanism should basically be disassembled and assem- To change the mechanism mode manually, rotate the emergency bled in the unloading end (No Cassette) position. gear of the mode motor assembly shown in Fig. 2.2.1 as below However, other mechanism position is sometimes required for while holding it down.
  • Page 48 PLAY, REC, BRAKE STBY-ON, SEARCH EJECT, UNLOAD FF/REW STBY-OFF POLE BASE PINCH ROLLER TENSION ARM OFF2 OFF1 STOP TEN. SPRING (S) STOP TEN. SPRING (T) REEL BRAKE (S) REEL BRAKE (T) SENSOR output...
  • Page 49 2.4 MAINTENANCE AND INSPECTION OF MAJOR PARTS Periodical inspection and maintenance are requisite to maintain the product will not only reduce considerably but other the initial performance and reliability of the product. Table 2-4-1 unfavorable influences may produce. (Maintenance & Inspection List) has been compiled assuming Rubber parts may deform or degrade after long period of stor- standard operating conditions, and the specifications in the ta- age even if they are not used in this period.
  • Page 50 2.4.2 Maintenance/inspection table 1)Replace the whole mechanism assembly in the 6000H maintenance. 2)The SUP/TU tension arm assemblies, sub-deck assembly (ENT. G. roller section) and EGR ARM assembly have undergone per- pendicularity management after being assembled. If any of the above assemblies needs replacement, the whole mechanism assembly should be replaced.
  • Page 51 2.4.3 Cleaning 3) Stain of the tape transport system leads to tape damage. When magnetic dust or dirt penetrates inside the rollers, a The tape transport system should be cleaned periodically. Be rotation malfunction may affect the video. Clean the tape sure to clean the tape transport system upon receipt of a set for transport parts carefully using a cleaning cloth or cotton swab servicing, etc.
  • Page 52 PERIODICAL MAINTENANCE Perform maintenance at the correct times in accordance with the maintenance table. Fig. 2-5-1 shows the flow chart of periodical maintenance procedures at different operating hours. Every 2000-hour maintenance 6000-hour maintenance Start Start Replaced parts Replaced parts ° SUP.
  • Page 53 Item Ref. Illustration Procedure REPLACEMENT OF MAJOR PARTS ! The disassembly procedures shown in oder of disassembly. To remove the part, it is necessary to have completed all the stages before it. ! Always use a torque driver and the specified securing torque to tighten screws. ! Position the mechanism to the unloading end (No Cassette) mode before disassembly or assembly unless otherwise specified.
  • Page 54 Item Ref. Illustration Procedure <Disassembly> Pinch roller arm assembly 1) While pushing the hook on the pinch plate, lift the pinch roller arm assembly upward to remove. Pinch roller arm assembly <Assembly> 1) Reverse the disassembly procedure. Please pay attention not to damage these roller part.
  • Page 55 Item Ref. Illustration Procedure Cassette guide assembly/ M.I.C guide <Disassembly> Cassette guide assembly: ( S1 ) 1)Remove the screws (S1) (S4) and remove the cas- sette guide assembly. Cassette guide assembly M.I.C guide: ( S4 ) 1)While pushing the hook on the M.I.C guide, lift it upward to remove.
  • Page 56 Item Ref. Illustration Procedure <Disassembly> Idler arm assembly 1) Remove the two screws (S2) and remove the idler cover. ( S2 ) 2) Remove the idler arm. ( S2 ) 3) Remove the emergency gear. Idler cover 4) Remove the spring (P2). <Assembly>...
  • Page 57 Item Ref. Illustration Procedure <Disassembly> Supply tension band assembly/ Supply tension arm assembly Supply tension band assembly: 1) Remove the slit washer (W2). ( W2 ) 2) Slide the tension band plate in the direction of ar- Plate section Supply tension band row 1 and remove the plate from the tension arm ( P3 ) assembly...
  • Page 58 Item Ref. Illustration Procedure <Disassembly> Take-up tension band assembly/ Take-up tension arm assembly Take-up tension band assembly: ( W2 ) 1)Remove the slit washer (W2). 2)Slide the plate section of tension band in the direc- Plate section TU tension band tion of arrow 1 and remove the plate from the ten- assembly sion arm stud.
  • Page 59 Item Ref. Illustration Procedure & <Disassembly> CONN gear assembly/ SUP reel disk assembly/ TU reel disk CONN. gear assembly assembly 1) Lift the two CONN gears upward to remove. SUP reel disk ( W2 ) assembly SUP and TU reel disk assemblies: ( W2 ) 1) Remove the two slit washers (W2) and lift the SUP ( W6 )
  • Page 60 Item Ref. Illustration Procedure 12 Switch lever <Disassembly> 1) Unhook the spring (P5). 2) Slide the switch lever in the direction of the arrow ( P5 ) and then lift it upward to remove. <Assembly> 1) Reverse the disassembly procedure. Switch lever Fig.
  • Page 61 Item Ref. Illustration Procedure 14 F-lock lever <Disassembly> 1) Slide the F-lock lever in the direction of the arrow to remove. <Assembly> 1) Reverse the disassembly procedure. F-lock lever Long Hole Cross-section Multemp SH-P in section 5. Fig. 2.6.14 15 Dew sensor/ E.G. roller arm assembly <Disassembly>...
  • Page 62 Item Ref. Illustration Procedure fl ‡ <Disassembly> 16 Sub-deck/ Pinch plate/ Capstan motor Sub-deck/pin plate: 1) Remove the three screws (S2) and slide the sub- deck in the direction of arrow then remove it. The Pinch plate Sub-deck pinch plate also detaches at this time. ( S2 ) Capstan motor: ( S6 )
  • Page 63 Item Ref. Illustration Procedure ° · <Disassembly> Supply pole base assembly/ Take-up pole base assembly Do this procedure in the loading end position. SUP pole base assembly Supply pole base assembly: TU pole base 1) Remove the two slit washers (W4) and remove the assembly supply pole base assembly.
  • Page 64 Item Ref. Illustration Procedure 19 Supply reel lock/ Take-up reel lock <Disassembly> Supply reel lock: ( P6 ) 1) Unhook the spring (P6) and lift the supply reel lock Take-up reel lock upward to remove. ( P6 ) Take-up reel lock: 1) Unhook the spring (P6) and lift the take-up reel lock Supply reel lock upward to remove.
  • Page 65 Item Ref. Illustration Procedure § ¶ <Disassembly> Arm gear/ Control arm Arm gear: Control arm Arm gear 1) Remove the main cam as described in No. 20 and remove the arm gear. Multemp SH-P Control arm: in section 5. 1) Place the main deck upside down. Stud 2) Bend the control plate slightly, disengage the con- trol arm’s stud from the groove on the plate and...
  • Page 66 Item Ref. Illustration Procedure 23 Leaf plate <Disassembly> 1) Push the supply side of the leaf plate in the direc- Leaf plate tion of arrow 1 to release the lock. 2) Push the take-up side of the leaf plate in the direc- tion of arrow 2 to release the lock.
  • Page 67 Item Ref. Illustration Procedure <Disassembly> FPC1 assembly 1) Remove the M.I.C connector and idler arm assem- Idler cover bly as described in section 2.6.7. 2) Remove solder from the M.I.C connector (6 posi- tions). 3) Remove the FPC1 assembly by performing the Match the hole to the boss same operation as peeling adhesive tape off for of an idler cover.
  • Page 68 Item Ref. Illustration Procedure 27 Cassette LED/ LED holder/ MECHA board assembly <Disassembly> Cassette LED: 1) Remove solder from LD1 on the mechanism board and remove the cassette LED. Cassette LED and LED holder LED holder: 1) While pushing the three claws locking the LED holder, remove it.
  • Page 69 Item Ref. Illustration Procedure GUIDE ROLLER REPLACEMENT METHOD Since the SUP/TU tension arm assembly, sub deck assembly (ENT, G, roller section), and E.G.R. arm, have all undergone perpendicu- larity management after being assembled respectively, assembly replacement of these is not possible. For maintenance, only the guide roller can be replaced.
  • Page 70 Measuring Measuring point Item instruments & Mode Adjustment parts ( Adjustment procedure Input signals Adjustment level ( TORQUE ADJUSTMENT Supply back Cassette torque Play Supply side reading 1) Insert the torque cassette meter VFK1843 torque meter of cassette torque and press the [PLAY] button. adjustment VFK1843 meter...
  • Page 71 Measuring Measuring point Item instruments & Mode Adjustment parts ( Adjustment procedure Input signals Adjustment level ( Take-up back Cassette torque REV x 1 Take-up side reading 1) Insert the torque cassette meter VFK1844 and torque meter VFK1844 of cassette torque enter REV x1 mode.
  • Page 72 INTERCHANGEABILITY ADJUSTMENT 2.9.1 Interchangeabilty adjustment flow chart Fig. 2-9-1 shows the flow chart of compatibility adjustment. Start Connect the REWRITE board. Enter modes PLAY SEARCH REV Set the RF envelope adjusted waveform flat. SEARCH FWD PLAY in this sequence, and confirm that tape is not damaged by wrinkles.
  • Page 73 2.9.2 Tape Transport Restriction The unit uses only the SUP guide roller and TU guide roller to restrict the tape transport. The tape is free (no restriction) from SUP slant pole TU guide roller other parts. TU slant SUP guide roller pole Capstan shaft SUP tension roller...
  • Page 74 Measuring Measuring point Item instruments & Mode Adjustment parts ( Adjustment procedure Input signals Adjustment level ( 2.9.3 Interchangeability adjustment Preparation (1) Connect a REWRITE board to the CN4004 on the MAIN board. Refer to preparation of "3.2 DVC UNITS AD- JUSTMENTS"...
  • Page 75 Measuring Measuring point Item instruments & Mode Adjustment parts ( Adjustment procedure Input signals Adjustment level ( Waveform • Oscilloscope, Eject Play TP9 ENV OUT (1) Switch the mode from Eject Play and co- rise check alignment tape Search FWD [REWRITE board] nfirm that the envelope is stabilized in less than VFK1842...
  • Page 76 5.15 MECHA & MECHA CONN SCHEMATIC DIAGRAMS MECHA CONN CN112 (Page 5-21) CN104 (Page 5-18) MECHA CONN CN116 (Page 5-22) CN106 (Page 5-18) MECHA...
  • Page 77 5.5 OVERALL WIRING DIAGRAM CN111 (MDA/DC) CN101 (DV/CPU)
  • Page 78 SERVICE INFORMATION CONTENTS CONSTRUCTION OF THE MAIN BOARD ..................1-1 HOW TO REMOVE THE OUTER COVER ..................1-2 1.2.1 Top cover .........................1-2 1.2.2 Bottom cover ........................1-2 1.2.3 Front panel ........................1-2 HOW TO REPLACE THE FUSE ....................1-2 HOW TO EXAMINE THE BOARDS....................1-3 1.4.1 MAIN board assembly......................1-3 1.4.2 MDA/DC board assembly....................1-3...
  • Page 79 SECTION 1 SERVICE INFORMATION CONSTRUCTION OF THE MAIN BOARD DV/CPU BOARD MECHA CONN BOARD ASSEMBLY ASSEMBLY 1 4 MDA/DC BOARD MAIN BOARD ASSEMBLY ASSEMBLY FRONT BOARD ASSEMBLY DV CONN BOARD ASSEMBLY MIC BOARD ASSEMBLY DV/CPU BOARD ASSEMBLY MDA/DC BOARD ASSEMBLY MECHA BOARD ASSEMBLY MECHA CONN BOARD ASSEMBLY MECHA BOARD...
  • Page 80 HOW TO REMOVE THE OUTER COVER 1.2.3 Front panel (1) Remove the top and bottom covers 1.2.1 Top cover (2) Remove the front panel while releasing the four hooks (1) Remove the four screws (2) Remove the top cover while lifting the rear part of it. TOP COVER Hook Hook...
  • Page 81 HOW TO EXAMINE THE BOARDS 1.4.2 MDA/DC board assembly (1) Remove the top cover to examine the A-side. 1.4.1 MAIN board assembly (2) To examine the B-side, pull down the main board as shown (1) Remove the bottom cover to examine the B-side of the main in Fig.
  • Page 82 1.4.4 FRONT board assembly (1) Remove the front panel to examine the front board. Mechanism unit (2) Remove the screw , and pull the board down to examine the B-side. CN4002 CN4003 FRONT board assembly Fig. 1.4.4 HOW TO REMOVE THE MECHANISM UNIT Fig.
  • Page 83 HOW TO REMOVE THE MECHANISM ASSEMBLY To remove only the mechanism assembly from the mechanism unit. (1) Remove the shield case on the DV/CPU board and remove the CN107 FPC wire from the drum assembly. CN107 To: CN117 To: CN114 MDA/DC board To: CN119 MDA/DC board...
  • Page 84 HOW TO TAKE OUT THE CASSETTE TAPE IN CASE OF EMERGENCY An emergency system on this unit enables the cassette tape to be taken out manually. When a cassette tape is stuck, take it out as described below. Procedure Å 1.
  • Page 85 SERVICE MENU 1.8.1 How to display the Service Menu In no cassette condition, by pressing the MENU button for 2 seconds or longer while keeping either the REC or PLAY button pressed, the first tier of the Service Menu will be displayed on the video monitor . As shown in Table 1.8.1, the Service Menu content that is displayed will dif fer depending on which buttons you press together simultaneously.
  • Page 86 1.8.3 VTR 1 menu Item Parameter REC REPEAT No repeat recording Repeat recording 2 times Repeat recording 12 times Full repeat recording FOOT SW LEVEL LEVEL1 Possible from any mode LEVEL2 Possible only from STOP or REC PAUSE mode MIC REC CH NORMAL Record input signal from connected MIC only on CH2 (CH4 : during A.DUB mode) CH1-MIX...
  • Page 87 1.8.5 DIP switch menu Sets the DIP SW. (All status are set to “OFF” or “0” when shipped.) Item Parameter Default setting at factory DIP SW 1/3 DIP SW – 0 1: Displays error rate monitor and CPU port information DIP SW –...
  • Page 88 1.8.6 HOUR METER menu Displays and resets the various types of hour meters. When the parameter is set to “CLEAR” and the SET button is pressed, the hour meter is cleared. Time duration/number of Item Parameter times display is possible DRUM Time display H Displays the drum hour meter (for drum maintenance) 000000~999999...
  • Page 89 1.8.7 ERROR HISTORY menu It can display 4 errors that have occurred in the past. Initially, when there is no error history in the memory, the first error to occur will be logged in the first position (HISTORY-1). The second and third errors to occur will be logged in (HISTORY-2) and (HISTORY-3).
  • Page 90 Item Content Displayed Content P.TM POWER HOUR METER Power hour meter is display. SYS MODE SYSCON CPU mode when error occurred SFF/SREW parameter is speed display. PLAY (03, 00) (Refer to Fig. 1.8.7 (2) Speed parameter) Parameters of other modes are irrelevant. MODE DATA Parameter EJECT (01) : Eject...
  • Page 91 Item Content Displayed Content MCV/SPD Loading/cassette housing control voltage [00-FF] : 0—8V (Displays mode motor control voltage (when error code 4xxx and error code 3xxx during error code 3xxx ) is displayed.) [00-FF] : 0-11V (Displays cassette motor control voltage during error code 4xxx) Tape speed (When the code excepting [00-FA] : 0—25X...
  • Page 92 (2) Error code description Error code Display Content of occurrence Method of detection Detected signal 0201 CONDENSATION ON DRUM DEW detected If DEW sensor detects IC302 (MSD) –detects condensation voltage of pin 318 3200 LOADING FAILURE Does not load If mechanism position does IC302-pin354 not move in loading direction Rotary encoder output is...
  • Page 93 1.8.8 OTHERS menu Item Parameter Standard setting MEMORY SW LOAD START Menu SW information is loaded from a store aria. MEMORY SW Standard setting SAVE START Menu SW information is saved to a store aria. CANCEL Standard setting ALL RESET I,U,E,EC Resets all EEP-ROM data to default settings except adjustment data, hour meter data, and IEEE1394 ID data.
  • Page 94 1.8.9 CPU version menu Displays version of SYSCON CPU and MSD (VCR) CPU. – – – M E N U – – – V T R 1 . . E X I T Firmware version C P U V E R S I O N SYSCON PLSL1144-VX-XX CPU version...
  • Page 95 Setting procedure (1) Press the 8 or 9 button to move the cursor to MEM. EDIT. (2) Press the : button to make the ADR parameter blink. (3) Press the 8 or 9 button to select ADR parameter “391”. (4) Press the : button to make the DATA parameter blink. (5) Press the 8 or 9 button to set ADR = “391”...

  • Page 96: Table Of Contents

    MECHANICAL ADJUSTMENTS CONTENTS BEFORE ADJUSTMENTS ......................2-1 2.1.1 Precautions ........................2-1 2.1.2 Measuring instruments required for adjustments.............2-1 2.1.3 Equipment required for adjustments ................2-1 DISASSEMBLY/ASSEMBLY OF THE MECHANISM ..............2-2 2.2.1 Mechanism position for disassembly/assembly ...............2-2 2.2.2 Mode transition.........................2-2 MECHANISM TIMING CHART .....................2-3 MAINTENANCE AND INSPECTION OF MAJOR PARTS ............2-4 2.4.1 Layout of Major Parts .......................2-4 2.4.2...

  • Page 97: Before Adjustments

    SECTION 2 MECHANICAL ADJUSTMENTS BEFORE ADJUSTMENTS 2.1.1 Precautions 2.1.2 Measuring instruments required for adjustments 1) Be sure to apply a screw securing torque when attaching a Instrument Condition part. Oscilloscope Calibrated instrument with measuring The securing torque should be 0.14 N/m (1.4 kgf/cm) unless bandwidth of 100 MHz or more.

  • Page 98: Disassembly/Assembly Of The Mechanism

    DISASSEMBLY/ASSEMBLY OF THE MECHANISM 2.2.1 Mechanism position for disassembly/assembly 2.2.2 Mode transition The mechanism should basically be disassembled and assem- To change the mechanism mode manually, rotate the emergency bled in the unloading end (No Cassette) position. gear of the mode motor assembly shown in Fig. 2.2.1 as below However, other mechanism position is sometimes required for while holding it down.
  • Page 99 PLAY, REC, BRAKE STBY-ON, SEARCH EJECT, UNLOAD FF/REW STBY-OFF POLE BASE PINCH ROLLER TENSION ARM OFF2 OFF1 STOP TEN. SPRING (S) STOP TEN. SPRING (T) REEL BRAKE (S) REEL BRAKE (T) SENSOR output...

  • Page 100: Maintenance And Inspection Of Major Parts

    2.4 MAINTENANCE AND INSPECTION OF MAJOR PARTS Periodical inspection and maintenance are requisite to maintain the product will not only reduce considerably but other the initial performance and reliability of the product. Table 2-4-1 unfavorable influences may produce. (Maintenance & Inspection List) has been compiled assuming Rubber parts may deform or degrade after long period of stor- standard operating conditions, and the specifications in the ta- age even if they are not used in this period.

  • Page 101: Maintenance/Inspection Table

    2.4.2 Maintenance/inspection table 1)Replace the whole mechanism assembly in the 6000H maintenance. 2)The SUP/TU tension arm assemblies, sub-deck assembly (ENT. G. roller section) and EGR ARM assembly have undergone per- pendicularity management after being assembled. If any of the above assemblies needs replacement, the whole mechanism assembly should be replaced.

  • Page 102: Cleaning

    2.4.3 Cleaning 3) Stain of the tape transport system leads to tape damage. When magnetic dust or dirt penetrates inside the rollers, a The tape transport system should be cleaned periodically. Be rotation malfunction may affect the video. Clean the tape sure to clean the tape transport system upon receipt of a set for transport parts carefully using a cleaning cloth or cotton swab servicing, etc.

  • Page 103: Periodical Maintenance

    PERIODICAL MAINTENANCE Perform maintenance at the correct times in accordance with the maintenance table. Fig. 2-5-1 shows the flow chart of periodical maintenance procedures at different operating hours. Every 2000-hour maintenance 6000-hour maintenance Start Start Replaced parts Replaced parts ° SUP.

  • Page 104: Replacement Of Major Parts

    Item Ref. Illustration Procedure REPLACEMENT OF MAJOR PARTS ! The disassembly procedures shown in oder of disassembly. To remove the part, it is necessary to have completed all the stages before it. ! Always use a torque driver and the specified securing torque to tighten screws. ! Position the mechanism to the unloading end (No Cassette) mode before disassembly or assembly unless otherwise specified.
  • Page 105 Item Ref. Illustration Procedure <Disassembly> Pinch roller arm assembly 1) While pushing the hook on the pinch plate, lift the pinch roller arm assembly upward to remove. Pinch roller arm assembly <Assembly> 1) Reverse the disassembly procedure. Please pay attention not to damage these roller part.
  • Page 106 Item Ref. Illustration Procedure Cassette guide assembly/ M.I.C guide <Disassembly> Cassette guide assembly: ( S1 ) 1)Remove the screws (S1) (S4) and remove the cas- sette guide assembly. Cassette guide assembly M.I.C guide: ( S4 ) 1)While pushing the hook on the M.I.C guide, lift it upward to remove.
  • Page 107 Item Ref. Illustration Procedure <Disassembly> Idler arm assembly 1) Remove the two screws (S2) and remove the idler cover. ( S2 ) 2) Remove the idler arm. ( S2 ) 3) Remove the emergency gear. Idler cover 4) Remove the spring (P2). <Assembly>...
  • Page 108 Item Ref. Illustration Procedure <Disassembly> Supply tension band assembly/ Supply tension arm assembly Supply tension band assembly: 1) Remove the slit washer (W2). ( W2 ) 2) Slide the tension band plate in the direction of ar- Plate section Supply tension band row 1 and remove the plate from the tension arm ( P3 ) assembly...
  • Page 109 Item Ref. Illustration Procedure <Disassembly> Take-up tension band assembly/ Take-up tension arm assembly Take-up tension band assembly: ( W2 ) 1)Remove the slit washer (W2). 2)Slide the plate section of tension band in the direc- Plate section TU tension band tion of arrow 1 and remove the plate from the ten- assembly sion arm stud.
  • Page 110 Item Ref. Illustration Procedure & <Disassembly> CONN gear assembly/ SUP reel disk assembly/ TU reel disk CONN. gear assembly assembly 1) Lift the two CONN gears upward to remove. SUP reel disk ( W2 ) assembly SUP and TU reel disk assemblies: ( W2 ) 1) Remove the two slit washers (W2) and lift the SUP ( W6 )
  • Page 111 Item Ref. Illustration Procedure 12 Switch lever <Disassembly> 1) Unhook the spring (P5). 2) Slide the switch lever in the direction of the arrow ( P5 ) and then lift it upward to remove. <Assembly> 1) Reverse the disassembly procedure. Switch lever Fig.
  • Page 112 Item Ref. Illustration Procedure 14 F-lock lever <Disassembly> 1) Slide the F-lock lever in the direction of the arrow to remove. <Assembly> 1) Reverse the disassembly procedure. F-lock lever Long Hole Cross-section Multemp SH-P in section 5. Fig. 2.6.14 15 Dew sensor/ E.G. roller arm assembly <Disassembly>...
  • Page 113 Item Ref. Illustration Procedure fl ‡ <Disassembly> 16 Sub-deck/ Pinch plate/ Capstan motor Sub-deck/pin plate: 1) Remove the three screws (S2) and slide the sub- deck in the direction of arrow then remove it. The Pinch plate Sub-deck pinch plate also detaches at this time. ( S2 ) Capstan motor: ( S6 )
  • Page 114 Item Ref. Illustration Procedure ° · <Disassembly> Supply pole base assembly/ Take-up pole base assembly Do this procedure in the loading end position. SUP pole base assembly Supply pole base assembly: TU pole base 1) Remove the two slit washers (W4) and remove the assembly supply pole base assembly.
  • Page 115 Item Ref. Illustration Procedure 19 Supply reel lock/ Take-up reel lock <Disassembly> Supply reel lock: ( P6 ) 1) Unhook the spring (P6) and lift the supply reel lock Take-up reel lock upward to remove. ( P6 ) Take-up reel lock: 1) Unhook the spring (P6) and lift the take-up reel lock Supply reel lock upward to remove.
  • Page 116 Item Ref. Illustration Procedure § ¶ <Disassembly> Arm gear/ Control arm Arm gear: Control arm Arm gear 1) Remove the main cam as described in No. 20 and remove the arm gear. Multemp SH-P Control arm: in section 5. 1) Place the main deck upside down. Stud 2) Bend the control plate slightly, disengage the con- trol arm’s stud from the groove on the plate and...
  • Page 117 Item Ref. Illustration Procedure 23 Leaf plate <Disassembly> 1) Push the supply side of the leaf plate in the direc- Leaf plate tion of arrow 1 to release the lock. 2) Push the take-up side of the leaf plate in the direc- tion of arrow 2 to release the lock.
  • Page 118 Item Ref. Illustration Procedure <Disassembly> FPC1 assembly 1) Remove the M.I.C connector and idler arm assem- Idler cover bly as described in section 2.6.7. 2) Remove solder from the M.I.C connector (6 posi- tions). 3) Remove the FPC1 assembly by performing the Match the hole to the boss same operation as peeling adhesive tape off for of an idler cover.
  • Page 119 Item Ref. Illustration Procedure 27 Cassette LED/ LED holder/ MECHA board assembly <Disassembly> Cassette LED: 1) Remove solder from LD1 on the mechanism board and remove the cassette LED. Cassette LED and LED holder LED holder: 1) While pushing the three claws locking the LED holder, remove it.

  • Page 120: Guide Roller Replacement Method

    Item Ref. Illustration Procedure GUIDE ROLLER REPLACEMENT METHOD Since the SUP/TU tension arm assembly, sub deck assembly (ENT, G, roller section), and E.G.R. arm, have all undergone perpendicu- larity management after being assembled respectively, assembly replacement of these is not possible. For maintenance, only the guide roller can be replaced.

  • Page 121: Torque Adjustment

    Measuring Measuring point Item instruments & Mode Adjustment parts ( Adjustment procedure Input signals Adjustment level ( TORQUE ADJUSTMENT Supply back Cassette torque Play Supply side reading 1) Insert the torque cassette meter VFK1843 torque meter of cassette torque and press the [PLAY] button. adjustment VFK1843 meter...
  • Page 122 Measuring Measuring point Item instruments & Mode Adjustment parts ( Adjustment procedure Input signals Adjustment level ( Take-up back Cassette torque REV x 1 Take-up side reading 1) Insert the torque cassette meter VFK1844 and torque meter VFK1844 of cassette torque enter REV x1 mode.

  • Page 123: Interchangeability Adjustment

    INTERCHANGEABILITY ADJUSTMENT 2.9.1 Interchangeabilty adjustment flow chart Fig. 2-9-1 shows the flow chart of compatibility adjustment. Start Connect the REWRITE board. Enter modes PLAY SEARCH REV Set the RF envelope adjusted waveform flat. SEARCH FWD PLAY in this sequence, and confirm that tape is not damaged by wrinkles.

  • Page 124: Tape Transport Restriction

    2.9.2 Tape Transport Restriction The unit uses only the SUP guide roller and TU guide roller to restrict the tape transport. The tape is free (no restriction) from SUP slant pole TU guide roller other parts. TU slant SUP guide roller pole Capstan shaft SUP tension roller...

  • Page 125: Interchangeability Adjustment

    Measuring Measuring point Item instruments & Mode Adjustment parts ( Adjustment procedure Input signals Adjustment level ( 2.9.3 Interchangeability adjustment Preparation (1) Connect a REWRITE board to the CN4004 on the MAIN board. Refer to preparation of "3.2 DVC UNITS AD- JUSTMENTS"...
  • Page 126 Measuring Measuring point Item instruments & Mode Adjustment parts ( Adjustment procedure Input signals Adjustment level ( Waveform • Oscilloscope, Eject Play TP9 ENV OUT (1) Switch the mode from Eject Play and co- rise check alignment tape Search FWD [REWRITE board] nfirm that the envelope is stabilized in less than VFK1842...
  • Page 127 ELECTRICAL ADJUSTMENTS CONTENTS PRECAUTIONS FOR ELECTRICAL ADJUSTMENTS..............3-1 3.1.1 Measuring instruments and Tools required for adjustments..........3-1 3.1.2 Alignment tape specifications...................3-1 3.1.3 Signals required for adjustments ..................3-1 3.1.4 Notes for adjustments ......................3-2 3.1.5 Adjustment menu ......................3-2 DVC UNIT ADJUSTMENTS ......................3-4 VIDEO SYSTEM ADJUSTMENTS ....................3-8 REWRITE BOARD SCHEMATIC DIAGRAM ................3-23...

  • Page 128: Precautions For Electrical Adjustments

    SECTION 3 ELECTRICAL ADJUSTMENTS PRECAUTIONS FOR ELECTRICAL ADJUSTMENTS 3.1.3 Signals required for adjustments NTSC and PAL color bar signals are required on “3.3 VIDEO Electrical adjustments should be performed only when they are SYSTEM ADJUTMENT”. required, for example, during maintenance. Electrical adjust- ments that are possible only after mechanism adjustments NTSC: should be performed after completing these.

  • Page 129: Notes For Adjustments

    3.1.4 Notes for adjustments 3.1.5 Adjustment menu Since the AG-DV2500 is compatible with the recording and play- (1) Operation method Use the ADJUST MENU for adjustments. The operating method back of the NTSC and PAL signals, it is required that both NTSC and PAL be adjusted.
  • Page 130 [PAL] Y level White Sync Burst YL/B CY/R G/MG Type [mVp-p] [mV] [mV] [mVp-p] [mVp-p] [mVp-p] [mVp-p] 1000 Y 100%, color 100% level Y 100%, color 75% level 1000 YL/B: Yellow and Blue level. CY/R: Cyan and Red level. G/MG: Green and Magenta level. Table 3.1.4 (2) Adjustment items and initial data The initial values are merely the typical values, which are written automatically after the EEP-ROM replacement, etc.

  • Page 131: Dvc Unit Adjustments

    DVC UNIT ADJUSTMENTS Preparation : Connect the Rewrite board (VFK1846) to CN4004 on the Main board. Connect it in the ori- entation shown in Fig. 3.2, so that the test point surface (component mounting surface) faces to- ward the rear. NOTE : DVC UNIT ADJUSTMENTS can be completed if NTSC mode is performed.
  • Page 132 Measuring point ( * ) Measuring Adjustment parts ( - ) Item instruments & Mode Adjustment procedure Adjustment level ( + ) Input signals (4) Measure TP6 (SPA) by triggering TP5 (HID) and confirm that the values a and b are within the specified ranges.
  • Page 133 Measuring Measuring point Item instruments & Mode Adjustment parts ( Adjustment procedure Input signals Adjustment level ( ME SP VCO Recording tape • Self-REC/ Monitor display (Notes) offset (brand-new tape) PLAY [PLAY] and [STOP] • Be sure to use a brand-new tape for the ME adjustment •...
  • Page 134 Measuring Measuring point Item instruments & Mode Adjustment parts ( Adjustment procedure Input signals Adjustment level ( FS PLL 48 Frequency TP4 (FS PLL) (1)Select ADJUST MENU No. 110, "FS PLL 48 kHz adjust- counter ADJUST GND: TP1 (GND) kHz". ment No input MENU, 110.

  • Page 135: Video System Adjustments

    VIDEO SYSTEM ADJUSTMENTS • Use NTSC signals for the NTSC adjustments and PAL signals for the PAL adjustments. • Use the specified signals to make adjustments whenever possible. When there are no specified signals, please refer to the “3.1.4 Notes for adjustments”. •...
  • Page 136 Measuring Measuring point Item instruments & Mode Adjustment parts ( Adjustment procedure Input signals Adjustment level ( NTSC PB WFM (NTSC) or C OUT (Y/C jack) (75 (1)Set the INPUT SELECT SW to LINE or Y/C. BURST level oscilloscope ADJUST terminated) (2)Select ADJUST MENU No.
  • Page 137 Measuring Measuring point Item instruments & Mode Adjustment parts ( Adjustment procedure Input signals Adjustment level ( NTSC Y/C IN WFM (NTSC) or C OUT (Y/C jack) (75 (1)Set the INPUT SELECT SW to LINE or Y/C. REC C level oscilloscope ADJUST terminated)
  • Page 138 Measuring point ( * ) Measuring Adjustment parts ( - ) Item instruments & Mode Adjustment procedure Adjustment level ( + ) Input signals * C OUT (Y/C jack) (75 ! 10 NTSC LINE IN WFM (NTSC) or (1) Set the INPUT SELECT SW to LINE or Y/C. ADJUST (2) Select ADJUST MENU No.
  • Page 139 Measuring point ( * ) Measuring Adjustment parts ( - ) Item instruments & Mode Adjustment procedure Adjustment level ( + ) Input signals * Y OUT (Y/C jack) (75 ! 13 NTSC LINE IN WFM (NTSC) or (1) Set the INPUT SELECT SW to LINE or Y/C. ADJUST (2) Select ADJUST MENU No.
  • Page 140 Measuring point ( * ) Measuring Adjustment parts ( - ) Item instruments & Mode Adjustment procedure Adjustment level ( + ) Input signals * Y OUT (Y/C jack) (75 ! 16 NTSC PB WFM (NTSC) or (1) Set the INPUT SELECT SW to LINE or Y/C. SETUP level oscilloscope ADJUST...
  • Page 141 Measuring Measuring point Item instruments & Mode Adjustment parts ( Adjustment procedure Input signals Adjustment level ( 19 NTSC PB WFM (NTSC) or C OUT (Y/C jack) (75 (1)Set the INPUT SELECT SW to LINE or Y/C. BURST level oscilloscope ADJUST terminated) (2)Select ADJUST MENU No.
  • Page 142 Measuring Measuring point Item instruments & Mode Adjustment parts ( Adjustment procedure Input signals Adjustment level ( 22 NTSC Y/C IN WFM (NTSC) or C OUT (Y/C jack) (75 (1)Set the INPUT SELECT SW to LINE or Y/C. REC SETUP oscilloscope ADJUST terminated)
  • Page 143 Measuring point ( * ) Measuring Adjustment parts ( - ) Item instruments & Mode Adjustment procedure Adjustment level ( + ) Input signals * C OUT (Y/C jack) (75 ! 25 NTSC LINE IN WFM (NTSC) or (1) Set the INPUT SELECT SW to LINE or Y/C. ADJUST (2) Select ADJUST MENU No.
  • Page 144 Measuring point ( * ) Measuring Adjustment parts ( - ) Item instruments & Mode Adjustment procedure Adjustment level ( + ) Input signals * Y OUT (Y/C jack) (75 ! 28 NTSC LINE IN WFM (NTSC) or (1) Set the INPUT SELECT SW to LINE or Y/C. (2) Select ADJUST MENU No.
  • Page 145 Measuring point ( * ) Measuring Adjustment parts ( - ) Item instruments & Mode Adjustment procedure Adjustment level ( + ) Input signals (2) PAL circuit adjustments Set the [NTSC /PAL] switch of rear panel to “PAL”. * Y OUT (Y/C jack) (75 ! 30 PAL PB Y WFM (PAL) or (1) Set the INPUT SELECT SW to LINE or Y/C.
  • Page 146 Measuring Measuring point Item instruments & Mode Adjustment parts ( Adjustment procedure Input signals Adjustment level ( 33 PAL PB WFM (PAL) or C OUT (Y/C jack) (75 (1)Set the INPUT SELECT SW to LINE or Y/C. BURST level oscilloscope ADJUST terminated) (2)Select ADJUST MENU No.
  • Page 147 Measuring Measuring point Item instruments & Mode Adjustment parts ( Adjustment procedure Input signals Adjustment level ( 36 PAL Y/C IN WFM (PAL) or C OUT (Y/C jack) (75 (1)Set the INPUT SELECT SW to LINE or Y/C. REC C level oscilloscope ADJUST terminated)
  • Page 148 Measuring Measuring point Item instruments & Mode Adjustment parts ( Adjustment procedure Input signals Adjustment level ( 39 PAL LINE IN WFM (PAL) or C OUT (Y/C jack) (75 (1)Set the INPUT SELECT SW to LINE or Y/C. REC C level oscilloscope ADJUST terminated)
  • Page 149 Measuring point ( * ) Measuring Adjustment parts ( - ) Item instruments & Mode Adjustment procedure Adjustment level ( + ) Input signals * Y OUT (Y/C jack) (75 ! 42 PAL LINE IN WFM (PAL) or (1) Set the INPUT SELECT SW to LINE or Y/C. EE Y level oscilloscope ADJUST...

  • Page 150: Rewrite Board Schematic Diagram

    REWRITE BOARD SCHEMATIC DIAGRAM AG-DV2500 Initial Parameter Not used Not used ON : Enable to rewrite VTR (MSD) ON : Enable to rewrite SYS CPU Not used ON : Enable to rewrite VTR (MSD) CPU ((Note) Not used Not used (Note : When rewriting the VTR (MSD) firmware, both of switch S1 - 1 and 4 should be set to “ON”.
  • Page 151 TECHNICAL DESCRIPTION CONTENTS PRODUCT OUTLINE ........................4-1 MECHANISM..........................4-1 4.2.1 Mechanism out line ......................4-1 4.2.2 Regarding standard cassette ...................4-1 4.2.3 Cassette housing operation outline..................4-2 4.2.4 Switches ...........................4-4 4.2.5 Reel motor........................4-4 4.2.6 Tension..........................4-4 4.2.7 Mode sensor ........................4-5 SYSTEM CONTROL........................4-5 4.3.1 Outline ..........................4-5 4.3.2 Communication specifications..................4-5 4.3.3 Communication timing......................4-5...

  • Page 152: Product Outline

    SECTION 4 TECHNICAL DESCRIPTION PRODUCT OUTLINE (1) DV Standard/Mini cassette compatible (2) 4.5 hours consecutive recording/playback possible using Standard cassette (DV270) (3) 5.25-inch half hight bay size compact design (mechanism unit only) (4) Layout-free with horizontal and vertical positioning capability MECHANISM 4.2.1 Mechanism out line Item...

  • Page 153: Cassette Housing Operation Outline

    4.2.3 Cassette housing operation outline (1) Inserted cassette type detection In its initial state, the reel disk is in the standard position, and only when a mini cassette is inserted it changes to the mini cassette position. As explained in Section 2, it is the reel change plate (Fig. 4.2.5) that changes the position of the reel disk. As previously compared in 4.2.1, the thickness of standard and mini cassettes differ.
  • Page 154 (2) Mini Cassette Incorrect Insertion Prevention Function Sub Flap Fig. 4.2.5 Sub Flap Sub flaps are attached on the cassette guide assembly located on the bottom end of the cassette housing door. These two sub flaps are designed to open when both are pressed simultaneously, and in the case of a mini cassette it is impossible for both to be pressed at the same time.

  • Page 155: Switches

    4.2.4 Switches This is a description of how the various switches equipped on the mechanism operate, as shown in table 4.2.2. Switch name Operation Location Cassette intake detection switch Fig. 4.2.6 Cassette eject detection switch Fig. 4.2.6 S1 (Mecha board) Standard cassette detection switch Fig.

  • Page 156: Mode Sensor

    4.2.7 Mode sensor The AG-DV2500’s mode sensor adopts the variable resistor method (MECHA board VR1) which uses changes in resistance to detect the position of the mechanism. The changed voltage, brought about by changes in the resistance value due to mechanism position, is sent to DV/CPU IC302 to made to the A/D conversion.

  • Page 157: Syscon (Ic2001) Cpu Port Functions

    4.3.4 SYSCON (IC2001) CPU port functions Pin No. Port Name Reference Description TP2004 Not used HOUSING_SW H : Insert cassette tape CASS_SW L : Complate to intake cassette tape DAC_CS (H) IC201 chip select 165_CS IC2006/IC2007 chip select 4094_CS IC3009/IC3010 chip select AUD_DACTL_CS (L) IC1006 (AUDIO DA) chip select 66311_DATA...
  • Page 158 Pin No. Port Name Reference Description P41/AN1 METER_CH1 AUDIO indicator P40/AN0 METER_CH2 Vref Analog reference AVCC Analog power Mode terminal 0 Pullup (not used) Mode terminal 1 Pullup (not used) OSC2 Subclock (32.768kHz) X2002 OSC1 Subclock (32.768kHz) Reset input From IC2004 Pullup (not used) STBY Standby...

  • Page 159: Msd Cpu (Ic302) Port Functions

    4.3.5 MSD CPU (IC302) port functions Pin No. Port Name Reference Description OPEN Not used OPEN Not used D_GND GND for digital P01/D1 STD_CASS_SW Standard cassette switch P05/D5 START_SEL_2 Standard sensor sensibility selection P11/D9 REEL_FWD_CTL Reel motor direction control NC (VDDF) VOUT_25 Power for digital D_GND...
  • Page 160 Pin No. Port Name Reference Description P62/IRQ10 Not used P80/ICR0 DRUM_FG DRUM_FG P81/ICR1 CAP_FG CAP_FG PT2/SBT9 OPEN Not used PS1/SBO4 MDA_IN For MDA communication PU0/WE2/SCAS OPEN Not used PS3/SBI5 OPEN Not used VOUT VOUT_25 Power for VDD and VDDF P00/D0 TAPE_LED For TAPE_LED D_GND...
  • Page 161 Pin No. Port Name Reference Description P91/ICR9 Interface with IC103 PR3/A22/KI3/SCKE GND (10k) Not used PR5/A24/KI5/SDCLKI GND (10k) Not used PQ2/A18 DV_RST Interface with IC103 PS0/SBI4 MDA_CS For MDA communication PR7/KI7/PWM5 GND (10k) Not used 119 — 127 OPEN Not used PA1/SBO6 OPEN Not used...
  • Page 162 Pin No. Port Name Reference Description 195 — 203 OPEN Not used D_GND GND for digital PD0/TM10IO OPEN Not used PC1/SY0OT1 OPEN Not used VDD2 AL_3VSYS Power for digital PC6/SY1OT2/SBT8 OPEN Not used OSCO 40MHz FRQS VTR_TAUX For rewrite PK7/TM37IO MONI_CHG Interface with P/R CKSEL...
  • Page 163 Pin No. Port Name Reference Description OPEN Not used TRST VSS (10k) Not used PF0/TM24IOA OPEN Not used PE2/TM21IOA DRUM_FG DRUM_FG PE0/TM20IOA GND (10k) Not used PF1/TM24IOB OPEN Not used PP1/ADM9/A9 ADM9 Interface with 3.5LSI PJ0/EXMOD0 GND (10k) Memory mode selection PO4/ADM4/A4 ADM4 Interface with IC103...
  • Page 164 Pin No. Port Name Reference Description D_GND GND for digital PN0/WE0/SDQM0 Interface with IC103 PM1/CS1 OPEN Not used PI7/AN23 GND (10k) Not used PI3/AN19 GND (10k) Not used PH3/AN11 HOUS_CURRENT Tension sensor PG5/AN5 MIC_1 AD for MIC IDBOARD detection AVDD AL_3VSYS Power for analog D_GND...

  • Page 165: Rs-422A Command List

    4.3.6 RS-422A command list COMMAND FROM CONTROLLER RETURN FROM CMD Data CMD DATA CMD Data CMD NAME NAME Count Count Local Disable Device Type Request Device Type Local Enable Stop Play StillÅiJVC OnlyÅj Standby Off Standby On Eject Fast Fwd Jog Fwd ACK (Switch to shuttle) Var Fwd...
  • Page 166 BLOCK DIAGRAMS SCHEMATIC DIAGRAMS CIRCUIT BOARD DIAGRAMS NOTE: BE SURE TO MAKE YOUR ORDERS OF REPLACEMENT PARTS ACCORDING TO PARTS LIST, SECTION 6 CONTENTS 5.1 INDEX TO PAGES OF MAIN BOARDS AND CIRCUIT BOARD LOCATION ........5-1 5.1.1 Circuit board location .......................5-1 5.2 SYSTEM CONTROL BLOCK DIAGRAM ..................5-2 5.3 VIDEO BLOCK DIAGRAM ......................5-3 5.4 AUDIO BLOCK DIAGRAM ......................5-4...

  • Page 167: Index To Pages Of Main Boards And Circuit Board Location

    5.1 INDEX TO PAGES OF MAIN BOARDS AND CIRCUIT BOARD LOCATION 5.1.1 Circuit board location DV/CPU BOARD MECHA CONN BOARD ASSEMBLY ASSEMBLY 1 MDA/DC BOARD ASSEMBLY MECHA BOARD ASSEMBLY DV CONN BOARD ASSEMBLY MIC BOARD ASSEMBLY FRONT BOARD MAIN BOARD ASSEMBLY ASSEMBLY Page of diagram...

  • Page 168: System Control Block Diagram

    5.2 SYSTEM CONTROL BLOCK DIAGRAM SYSTEM CONTROLL MECHA CONTROLL 1 1 DV/CPU BLOCK BLOCK LED driver (IC2008) OPE LED (IC1) DRUM MECHA (IC11) OPE KEY Para Seri SIO(MS BUS) (IC2006,2007) REEL (IC21) MSD CPU (IC2002) VIDEO IC302 SYSCON CPU MN103S33N (IC2003) (IC301) Seri Para...

  • Page 169: Video Block Diagram

    5.3 VIDEO BLOCK DIAGRAM...

  • Page 170: Audio Block Diagram

    5.4 AUDIO BLOCK DIAGRAM...

  • Page 171: Overall Wiring Diagram

    5.5 OVERALL WIRING DIAGRAM CN111 (MDA/DC) CN101 (DV/CPU)

  • Page 172: Dv Unit Overall Wiring Diagram

    5.6 DV UNIT OVERALL WIRING DIAGRAM...

  • Page 173: Main Schematic Diagram

    5.7 MAIN SCHEMATIC DIAGRAM 1/6 NTSC -1.5 -2.1 -0.2 -4.9 -4.9 Composite ( CPS ) NTSC CPS Y -1.2 -4.9 -1.8 -8.4 -4.9 Y/C SEP NTSC -0.8 -0.2 -1.4 -0.2 -0.4 -0.7 -0.8 -0.2 CPS C -0.8 -0.1 -0.7 -0.9 -0.8 -8.4 NTSC...
  • Page 174 MAIN SCHEMATIC DIAGRAM 2/6 TP206 TP206 NTSC TP205 TP205 NTSC Y/C Y -0.1 -0.2 CPS Y SEP Y Y/C C -1.6 -0.4 -0.2 -0.2 -0.2 -1.0 -1.4 -2.0 -1.7 -0.9 -2.1 CPS C -4.9 SEP C ENC C ENC Y TP207 TP207 NTSC...
  • Page 175 MAIN SCHEMATIC DIAGRAM 3/6 (Page 5-25) (3.0) (1.5) (3.0) -8.4 AUD 2/4 -8.4 -7.4 -7.4 -8.4 AUD 1/3 -8.4 AUD 1/3 AUD 2/4 -8.4...
  • Page 176 MAIN SCHEMATIC DIAGRAM 4/6...
  • Page 177 MAIN SCHEMATIC DIAGRAM 5/6 IMPORTANT SAFETY NOTICE: COMPONENTS IDENTIFIED WITH THE MARK HAVE THE SPECIAL CHARACTERISTICS FOR SAFETY. WHEN REPLACING ANY OF THESE COMPONENTS, USE ONLY THE SAME TYPE. 12.0 11.1 11.1 11.8 10.1 12.0 10.1 10.0 11.1 11.2 11.3 12.0 11.9 12.0...
  • Page 178 MAIN SCHEMATIC DIAGRAM 6/6 (Page 5-16) (Page 5-16, 5-18)

  • Page 179: Main Circuit Board

    5.8 MAIN CIRCUIT BOARD SIDE A ADDRESS TABLE OF BOARD PARTS Each address may have an address error by one interval. A-1C Side Y axis X axis A-8D Q605 A-1E B-5A R248 A-2D R379 A-4E R1052 B-7A A-5A Q606 A-6D B-5B R249 B-2D...
  • Page 180 SIDE B R2148 A-4G B-4A C229 B-2C C604 A-7D C3024 B-7G S4001 A-11G R2149 A-4G B-4A C230 A-1D C605 A-6D C3025 A-6F R2150 A-4G A-4A C231 A-1D C606 A-4D C3026 B-6G A-4A R2151 A-4G B-4B C232 A-2D C607 A-5D C3027 B-8H A-5B R2152...

  • Page 181: Dv/Cpu Schematic Diagram

    5.9 DV/CPU SCHEMATIC DIAGRAM 1/4 BIAS GAIN...
  • Page 182 DV/CPU SCHEMATIC DIAGRAM 2/4 FROM/TO MAIN CN4003 (Page 5-12) COMP SHUFF DE COMP DE SHUFF DE FORMAT FROM/TO FORMAT MAIN CN4002 (Page 5-12) VITERBI C142 DV EQ FROM/TO MAIN CN4003 (Page 5-12) FROM/TO DV CONN CN201 (Page 5-25)
  • Page 183 DV/CPU SCHEMATIC DIAGRAM 3/4...
  • Page 184 DV/CPU SCHEMATIC DIAGRAM 4/4 CN108 (Page 5-24) FROM MDA DC CN105 (Page 5-27) CN104 (Page 5-27) FROM/TO MAIN CN4002 (Page 5-12) CN106 (Page 5-27)

  • Page 185: Dv/Cpu Circuit Board

    5.10 DV/CPU CIRCUIT BOARD ADDRESS TABLE OF BOARD PARTS Each address may have an address error by one interval. SIDE A A-1C Side Y axis X axis A-2D R136 A-2C R339 A-2G R473 B-1G C119 A-2E C439 A-1B A-2C R137 A-2C R340 A-2G...

  • Page 186: Mda/Dc Circuit Board

    5.11 MDA/DC CIRCUIT BOARD ADDRESS TABLE OF BOARD PARTS Each address may have an address error by one interval. SIDE A A-1C Side Y axis X axis IC11 B-2D R120 B-2D R328 A-3G C142 B-2D C422 A-3A IC12 B-2A R121 B-2D R329 B-2G...

  • Page 187: Mda/Dc Schematic Diagram

    5.12 MDA/DC SCHEMATIC DIAGRAM 1/4 MECHA CONN CN112 (Page 5-27)
  • Page 188 MDA/DC SCHEMATIC DIAGRAM 2/4 CN105 (Page 5-18) CN116 (Page 5-27)
  • Page 189 MDA/DC SCHEMATIC DIAGRAM 3/4 IMPORTANT SAFETY NOTICE: COMPONENTS IDENTIFIED WITH THE MARK HAVE THE SPECIAL CHARACTERISTICS FOR SAFETY. WHEN REPLACING ANY OF THESE COMPONENTS, USE ONLY THE SAME TYPE. FROM MAIN CN3001 ( Page 5-11 )
  • Page 190 MDA/DC SCHEMATIC DIAGRAM 4/4 CN108 ( Page 5-18 )

  • Page 191: Fdm (Front, Dv Conn & Mic) Schematic Diagrams

    5.13 FDM (FRONT, DV CONN & MIC) SCHEMATIC DIAGRAMS (Page 5-16) (Page 5-9 ) (Page 5-12)

  • Page 192: Fdm (Front, Dv Conn & Mic) Circuit Boards

    5.14 FDM (FRONT, DV CONN & MIC) CIRCUIT BOARDS FRONT CIRCUIT BOARD ADDRESS TABLE OF BOARD PARTS SIDE A Each address may have an address error by one interval. A-1C Side Y axis X axis A-3E A-3D LD13 A-3D A-2F LD14 A-2F A-1A...

  • Page 193: Mecha & Mecha Conn Schematic Diagrams

    5.15 MECHA & MECHA CONN SCHEMATIC DIAGRAMS MECHA CONN CN112 (Page 5-21) CN104 (Page 5-18) MECHA CONN CN116 (Page 5-22) CN106 (Page 5-18) MECHA...

  • Page 194: Mecha & Mecha Conn Circuit Boards

    5.16 MECHA & MECHA CONN CIRCUIT BOARDS MECHA CIRCUIT BOARD SIDE A...
  • Page 195 MECHA CONN CIRCUIT BOARD SIDE B SIDE A...

  • Page 196: Ic Block Diagrams

    5.17 IC BLOCK DIAGRAMS...
  • Page 206 EXPLODED VIEWS & REPLACEMENT PARTS LIST CONTENTS SERVICING FIXTURES & TOOLS MECHANISM PARTS ASSEMBLY....................PRT-1 CABINET PARTS ASSEMBLY ......................PRT-3 PACKING PARTS ASSEMBLY......................PRT-5 ELECTRICAL REPLACEMENT PARTS LIST .................PRT-7 SERVICING FIXTURES & TOOLS...

  • Page 207: Mechanism Parts Assembly

    MECHANISM PARTS ASSEMBLY MECHA CONN BOARD ASSEMBL Apply the screw lock Apply the screw lock Apply the screw lock Red marking Apply the screw lock Fold to shaft of No.24 Bottom side Bottom side MECHA BOARD ASSEMBL Bottom side Bottom side...
  • Page 208 MECHANISM PARTS ASSEMBLY Ref.No. Part No. Part Name & Description Remarks Ref.No. Part No. Part Name & Description Remarks QSD0006-001 DEW SENSOR LL30247-001A MECHANISM ASS'Y LL30275-001A SUP P.BASE ASSY LL20081-001A TAPE GUARD LL30277-001A SUP P.B.PLATE WJT0085-001A WIRE LL40284-001A G.ROLLER ASS'Y LL40370-001A P.ARM F.ASS'Y LL30278-001A...

  • Page 209: Cabinet Parts Assembly

    CABINET PARTS ASSEMBLY Components identified with the mark have the special characteristics for safety. When replacing any of these components, use only the same type. Note) Valley fold Electrode surface Plate V/CPU BOARD ASSEMBL From Head cleaner From From Mode Motor Drum CONN BO ASSEMBLY...
  • Page 210 CABINET PARTS ASSEMBLY Ref.No. Part No. Part Name & Description Remarks Ref.No. Part No. Part Name & Description Remarks LL30318-001A CENTER BRACKET LL20089-001A SIDE FRAME (L) LL20090-001A SIDE FRAME (R) LL30319-001A FRONT BRACKET LL40366-001A BRACKET LL40363-001A KNOB LL20092-003A BOTTOM COVER LL20092-004A TOP COVER LL40390-003A...

  • Page 211: Packing Parts Assembly

    PACKING PARTS ASSEMBLY Components identified with the mark have the special characteristics for safety. When replacing any of these components, use only the same type. PRT-5...
  • Page 212 PACKING PARTS ASSEMBLY Ref.No. Part No. Part Name & Description Remarks Ref.No. Part No. Part Name & Description Remarks LLT029-001A OPERATING INSTRUCTIONS 1 FOR AG-DV2500P LLT030-001A OPERATING INSTRUCTIONS 1 FOR AG-DV2500E QPB02403404 POLYETHYLENE BAG LL10073-001A STAND SS45331 FOOT LL40373-001A QPA01502005...
  • Page 213 ELECTRICAL REPLACEMENT PARTS LIST Ref.No. Part No. Part Name & Description Remarks Ref.No. Part No. Part Name & Description Remarks NDC31HJ-8R0X C.CAPACITOR LK1173B0C MAIN P.C.BOARD 1 (RTL) C67,68 NDC31HJ-102X C.CAPACITOR 50V 1000U NCB31CK-104X C.CAPACITOR 16V 0.1U LK2129B0A1 FRONT P.C.BOARD 1 (RTL) NEH90JM-476X E.CAPACITOR 6.3V C71-73...
  • Page 214 Ref.No. Part No. Part Name & Description Remarks Ref.No. Part No. Part Name & Description Remarks C261 NEH90JM-476X E.CAPACITOR 6.3V C1009,10 NEH91CM-106X E.CAPACITOR C262,63 NCB31HK-103X C.CAPACITOR 50V 0.01U C1011 NEH91CM-476X E.CAPACITOR C264,65 NCB31CK-104X C.CAPACITOR 16V 0.1U C1012 NEH90JM-476X E.CAPACITOR 6.3V C267 NDC31HJ-150X C.CAPACITOR...
  • Page 215 Ref.No. Part No. Part Name & Description Remarks Ref.No. Part No. Part Name & Description Remarks C3040 NCB31HK-103X C.CAPACITOR 50V 0.01U IC1017 TC4W53FU C3041,42 NCB11EK-105X C.CAPACITOR IC2002 RS5C314 C3043-45 NCB11AK-106X C.CAPACITOR IC2003 M95320-WMN6 C3046 NCS31EJ-102X C.CAPACITOR 25V 1000P IC2004 RN5VD26AA C3047-49 NCB11AK-106X C.CAPACITOR...
  • Page 216 Ref.No. Part No. Part Name & Description Remarks Ref.No. Part No. Part Name & Description Remarks 2SC4617 TRANSISTOR NRSA63D-471X M.RESISTOR CH 1/16W 470 2SA1774 TRANSISTOR NRSA63D-101X M.RESISTOR CH 1/16W 100 Q20,21 2SC4617 TRANSISTOR NRSA63D-331X M.RESISTOR CH 1/16W 330 DTC124EUA TRANSISTOR NRSA63D-101X M.RESISTOR CH 1/16W 100 Q23-26...
  • Page 217 Ref.No. Part No. Part Name & Description Remarks Ref.No. Part No. Part Name & Description Remarks R108 NRSA63J-152X M.RESISTOR CH 1/16W 1.5K R303 NRSA63J-222X M.RESISTOR CH 1/16W 2.2K R109 NRSA63D-182X M.RESISTOR CH 1/16W 1.8K R304 NRSA63J-221X M.RESISTOR CH 1/16W 220 R110 NRSA63D-102X M.RESISTOR CH 1/16W...
  • Page 218 Ref.No. Part No. Part Name & Description Remarks Ref.No. Part No. Part Name & Description Remarks R611 NRSA63D-332X M.RESISTOR CH 1/16W 3.3K R2024 NRSA63J-332X M.RESISTOR CH 1/16W 3.3K R612 NRSA63J-104X M.RESISTOR CH 1/16W 100K R2025,26 NRSA63J-0R0X M.RESISTOR CH 1/16W R613 NRSA63J-0R0X M.RESISTOR CH 1/16W R2031,32...
  • Page 219 Ref.No. Part No. Part Name & Description Remarks Ref.No. Part No. Part Name & Description Remarks R3045 NRSA63J-332X M.RESISTOR CH 1/16W 3.3K R201-04 NRSA63J-0R0X M.RESISTOR CH 1/16W R3046 NRSA63D-472X M.RESISTOR CH 1/16W 4.7K R3048 NRSA63D-332X M.RESISTOR CH 1/16W 3.3K R3049 NRSA63D-152X M.RESISTOR CH 1/16W 1.5K R3050...
  • Page 220 Ref.No. Part No. Part Name & Description Remarks Ref.No. Part No. Part Name & Description Remarks C301,02 NCB31CK-104X C.CAPACITOR 16V 0.1U K103 NQR0265-001X FERAITE BEAD C303 NCF31AZ-105X C.CAPACITOR K401,02 NQR0265-001X FERAITE BEAD C304 NCB31CK-104X C.CAPACITOR 16V 0.1U C305 NCF31AZ-105X C.CAPACITOR L1-L4 NQL044K-100X COIL...
  • Page 221 Ref.No. Part No. Part Name & Description Remarks Ref.No. Part No. Part Name & Description Remarks R330-34 NRSA63J-103X M.RESISTOR CH 1/16W 10K C142 NCB31CK-104X C.CAPACITOR 16V 0.1U R335 NRSA63J-0R0X M.RESISTOR CH 1/16W C143 NCB31CK-223X C.CAPACITOR 16V 0.022U R336-52 NRSA63J-103X M.RESISTOR CH 1/16W 10K C144 NCB31CK-473X C.CAPACITOR...
  • Page 222 Ref.No. Part No. Part Name & Description Remarks Ref.No. Part No. Part Name & Description Remarks DAP222 DIODE R124,25 NRSA63J-102X M.RESISTOR CH 1/16W MA3110L ZENER DIODE R126 NRSA63J-274X M.RESISTOR CH 1/16W 270K DAP222 DIODE R127 NRSA63J-272X M.RESISTOR CH 1/16W 2.7K MA3020 ZENER DIODE R128...
  • Page 223 Ref.No. Part No. Part Name & Description Remarks Ref.No. Part No. Part Name & Description Remarks R402,03 NRSA63J-0R0X M.RESISTOR CH 1/16W R404 NRSA63D-472X M.RESISTOR CH 1/16W 4.7K R405 NRSA63D-332X M.RESISTOR CH 1/16W 3.3K R406,07 NRSA63D-472X M.RESISTOR CH 1/16W 4.7K R408 NRSA63D-473X M.RESISTOR CH 1/16W 47K R409...
  • Page 224 5.4 AUDIO BLOCK DIAGRAM...
  • Page 225 5.2 SYSTEM CONTROL BLOCK DIAGRAM SYSTEM CONTROLL MECHA CONTROLL 1 1 DV/CPU BLOCK BLOCK LED driver (IC2008) OPE LED (IC1) DRUM MECHA (IC11) OPE KEY Para Seri SIO(MS BUS) (IC2006,2007) REEL (IC21) MSD CPU (IC2002) VIDEO IC302 SYSCON CPU MN103S33N (IC2003) (IC301) Seri Para...
  • Page 226 5.3 VIDEO BLOCK DIAGRAM...
  • Page 227 5.10 DV/CPU CIRCUIT BOARD ADDRESS TABLE OF BOARD PARTS Each address may have an address error by one interval. SIDE A A-1C Side Y axis X axis A-2D R136 A-2C R339 A-2G R473 B-1G C119 A-2E C439 A-1B A-2C R137 A-2C R340 A-2G...
  • Page 228 5.14 FDM (FRONT, DV CONN & MIC) CIRCUIT BOARDS FRONT CIRCUIT BOARD ADDRESS TABLE OF BOARD PARTS SIDE A Each address may have an address error by one interval. A-1C Side Y axis X axis A-3E A-3D LD13 A-3D A-2F LD14 A-2F A-1A...
  • Page 229 5.8 MAIN CIRCUIT BOARD SIDE A ADDRESS TABLE OF BOARD PARTS Each address may have an address error by one interval. A-1C Side Y axis X axis A-8D Q605 A-1E B-5A R248 A-2D R379 A-4E R1052 B-7A A-5A Q606 A-6D B-5B R249 B-2D...
  • Page 230 SIDE B R2148 A-4G B-4A C229 B-2C C604 A-7D C3024 B-7G S4001 A-11G R2149 A-4G B-4A C230 A-1D C605 A-6D C3025 A-6F R2150 A-4G A-4A C231 A-1D C606 A-4D C3026 B-6G A-4A R2151 A-4G B-4B C232 A-2D C607 A-5D C3027 B-8H A-5B R2152...
  • Page 231 5.11 MDA/DC CIRCUIT BOARD ADDRESS TABLE OF BOARD PARTS Each address may have an address error by one interval. SIDE A A-1C Side Y axis X axis IC11 B-2D R120 B-2D R328 A-3G C142 B-2D C422 A-3A IC12 B-2A R121 B-2D R329 B-2G...
  • Page 232 5.16 MECHA & MECHA CONN CIRCUIT BOARDS MECHA CIRCUIT BOARD SIDE A...
  • Page 233 MECHA CONN CIRCUIT BOARD SIDE B SIDE A...
  • Page 234 Sec. 3 Electrical Adjustments Sec. 4 Technical Description DV VIDEO CASSETTE RECORDER Sec. 5 Block Diagrams/ AG-DV2500P/E Schematic Diagrams/ Circuit Board Diagrams Sec. 6 Exploded Views & Replacement Parts List © 2003 Matsushita Electric Industrial Co., Ltd. All rights reserved.
  • Page 235 Any attempt to service or repair the product or products dealt with in this service information by anyone else could result in serious injury or death. AG-DV2500P - 2 -...
  • Page 236 AG-DV2500E - 3 -...
  • Page 237 SAFETY PRECAUTIONS GENERAL GUIDELINES ELECTROSTATICALLY SENSITIVE (ES) DEVICES 1. When servicing, observe the original lead dress. If a Some semiconductor (solid state) devices can be damaged short circuit is found, replace all parts which have been easily by static electricity. Such components commonly are over-heated or damaged by the short circuit.
  • Page 238 AG-DV2500P - 5 -...
  • Page 239 AG-DV2500E - 6 -...
  • Page 240 - 7 -...
  • Page 241 FCD0303BYNK130...
  • Page 242 SECTION 4 TECHNICAL DESCRIPTION PRODUCT OUTLINE (1) DV Standard/Mini cassette compatible (2) 4.5 hours consecutive recording/playback possible using Standard cassette (DV270) (3) 5.25-inch half hight bay size compact design (mechanism unit only) (4) Layout-free with horizontal and vertical positioning capability MECHANISM 4.2.1 Mechanism out line Item...
  • Page 243 4.2.3 Cassette housing operation outline (1) Inserted cassette type detection In its initial state, the reel disk is in the standard position, and only when a mini cassette is inserted it changes to the mini cassette position. As explained in Section 2, it is the reel change plate (Fig. 4.2.5) that changes the position of the reel disk. As previously compared in 4.2.1, the thickness of standard and mini cassettes differ.
  • Page 244 (2) Mini Cassette Incorrect Insertion Prevention Function Sub Flap Fig. 4.2.5 Sub Flap Sub flaps are attached on the cassette guide assembly located on the bottom end of the cassette housing door. These two sub flaps are designed to open when both are pressed simultaneously, and in the case of a mini cassette it is impossible for both to be pressed at the same time.
  • Page 245 4.2.4 Switches This is a description of how the various switches equipped on the mechanism operate, as shown in table 4.2.2. Switch name Operation Location Cassette intake detection switch Fig. 4.2.6 Cassette eject detection switch Fig. 4.2.6 S1 (Mecha board) Standard cassette detection switch Fig.
  • Page 246 4.2.7 Mode sensor The AG-DV2500’s mode sensor adopts the variable resistor method (MECHA board VR1) which uses changes in resistance to detect the position of the mechanism. The changed voltage, brought about by changes in the resistance value due to mechanism position, is sent to DV/CPU IC302 to made to the A/D conversion.
  • Page 247 4.3.4 SYSCON (IC2001) CPU port functions Pin No. Port Name Reference Description TP2004 Not used HOUSING_SW H : Insert cassette tape CASS_SW L : Complate to intake cassette tape DAC_CS (H) IC201 chip select 165_CS IC2006/IC2007 chip select 4094_CS IC3009/IC3010 chip select AUD_DACTL_CS (L) IC1006 (AUDIO DA) chip select 66311_DATA...
  • Page 248 Pin No. Port Name Reference Description P41/AN1 METER_CH1 AUDIO indicator P40/AN0 METER_CH2 Vref Analog reference AVCC Analog power Mode terminal 0 Pullup (not used) Mode terminal 1 Pullup (not used) OSC2 Subclock (32.768kHz) X2002 OSC1 Subclock (32.768kHz) Reset input From IC2004 Pullup (not used) STBY Standby...
  • Page 249 4.3.5 MSD CPU (IC302) port functions Pin No. Port Name Reference Description OPEN Not used OPEN Not used D_GND GND for digital P01/D1 STD_CASS_SW Standard cassette switch P05/D5 START_SEL_2 Standard sensor sensibility selection P11/D9 REEL_FWD_CTL Reel motor direction control NC (VDDF) VOUT_25 Power for digital D_GND...
  • Page 250 Pin No. Port Name Reference Description P62/IRQ10 Not used P80/ICR0 DRUM_FG DRUM_FG P81/ICR1 CAP_FG CAP_FG PT2/SBT9 OPEN Not used PS1/SBO4 MDA_IN For MDA communication PU0/WE2/SCAS OPEN Not used PS3/SBI5 OPEN Not used VOUT VOUT_25 Power for VDD and VDDF P00/D0 TAPE_LED For TAPE_LED D_GND...
  • Page 251 Pin No. Port Name Reference Description P91/ICR9 Interface with IC103 PR3/A22/KI3/SCKE GND (10k) Not used PR5/A24/KI5/SDCLKI GND (10k) Not used PQ2/A18 DV_RST Interface with IC103 PS0/SBI4 MDA_CS For MDA communication PR7/KI7/PWM5 GND (10k) Not used 119 — 127 OPEN Not used PA1/SBO6 OPEN Not used...
  • Page 252 Pin No. Port Name Reference Description 195 — 203 OPEN Not used D_GND GND for digital PD0/TM10IO OPEN Not used PC1/SY0OT1 OPEN Not used VDD2 AL_3VSYS Power for digital PC6/SY1OT2/SBT8 OPEN Not used OSCO 40MHz FRQS VTR_TAUX For rewrite PK7/TM37IO MONI_CHG Interface with P/R CKSEL...
  • Page 253 Pin No. Port Name Reference Description OPEN Not used TRST VSS (10k) Not used PF0/TM24IOA OPEN Not used PE2/TM21IOA DRUM_FG DRUM_FG PE0/TM20IOA GND (10k) Not used PF1/TM24IOB OPEN Not used PP1/ADM9/A9 ADM9 Interface with 3.5LSI PJ0/EXMOD0 GND (10k) Memory mode selection PO4/ADM4/A4 ADM4 Interface with IC103...
  • Page 254 Pin No. Port Name Reference Description D_GND GND for digital PN0/WE0/SDQM0 Interface with IC103 PM1/CS1 OPEN Not used PI7/AN23 GND (10k) Not used PI3/AN19 GND (10k) Not used PH3/AN11 HOUS_CURRENT Tension sensor PG5/AN5 MIC_1 AD for MIC IDBOARD detection AVDD AL_3VSYS Power for analog D_GND...
  • Page 255 4.3.6 RS-422A command list COMMAND FROM CONTROLLER RETURN FROM CMD Data CMD DATA CMD Data CMD NAME NAME Count Count Local Disable Device Type Request Device Type Local Enable Stop Play StillÅiJVC OnlyÅj Standby Off Standby On Eject Fast Fwd Jog Fwd ACK (Switch to shuttle) Var Fwd...
  • Page 256 5.9 DV/CPU SCHEMATIC DIAGRAM 1/4 BIAS GAIN...
  • Page 257 DV/CPU SCHEMATIC DIAGRAM 2/4 FROM/TO MAIN CN4003 (Page 5-12) COMP SHUFF DE COMP DE SHUFF DE FORMAT FROM/TO FORMAT MAIN CN4002 (Page 5-12) VITERBI C142 DV EQ FROM/TO MAIN CN4003 (Page 5-12) FROM/TO DV CONN CN201 (Page 5-25)
  • Page 258 DV/CPU SCHEMATIC DIAGRAM 3/4...
  • Page 259 DV/CPU SCHEMATIC DIAGRAM 4/4 CN108 (Page 5-24) FROM MDA DC CN105 (Page 5-27) CN104 (Page 5-27) FROM/TO MAIN CN4002 (Page 5-12) CN106 (Page 5-27)
  • Page 260 5.6 DV UNIT OVERALL WIRING DIAGRAM...

  • Page 261: Electrical Replacement Parts List

    ELECTRICAL REPLACEMENT PARTS LIST Ref.No. Part No. Part Name & Description Remarks Ref.No. Part No. Part Name & Description Remarks NDC31HJ-8R0X C.CAPACITOR LK1173B0C MAIN P.C.BOARD 1 (RTL) C67,68 NDC31HJ-102X C.CAPACITOR 50V 1000U NCB31CK-104X C.CAPACITOR 16V 0.1U LK2129B0A1 FRONT P.C.BOARD 1 (RTL) NEH90JM-476X E.CAPACITOR 6.3V C71-73...
  • Page 262 Ref.No. Part No. Part Name & Description Remarks Ref.No. Part No. Part Name & Description Remarks C261 NEH90JM-476X E.CAPACITOR 6.3V C1009,10 NEH91CM-106X E.CAPACITOR C262,63 NCB31HK-103X C.CAPACITOR 50V 0.01U C1011 NEH91CM-476X E.CAPACITOR C264,65 NCB31CK-104X C.CAPACITOR 16V 0.1U C1012 NEH90JM-476X E.CAPACITOR 6.3V C267 NDC31HJ-150X C.CAPACITOR...
  • Page 263 Ref.No. Part No. Part Name & Description Remarks Ref.No. Part No. Part Name & Description Remarks C3040 NCB31HK-103X C.CAPACITOR 50V 0.01U IC1017 TC4W53FU C3041,42 NCB11EK-105X C.CAPACITOR IC2002 RS5C314 C3043-45 NCB11AK-106X C.CAPACITOR IC2003 M95320-WMN6 C3046 NCS31EJ-102X C.CAPACITOR 25V 1000P IC2004 RN5VD26AA C3047-49 NCB11AK-106X C.CAPACITOR...
  • Page 264 Ref.No. Part No. Part Name & Description Remarks Ref.No. Part No. Part Name & Description Remarks 2SC4617 TRANSISTOR NRSA63D-471X M.RESISTOR CH 1/16W 470 2SA1774 TRANSISTOR NRSA63D-101X M.RESISTOR CH 1/16W 100 Q20,21 2SC4617 TRANSISTOR NRSA63D-331X M.RESISTOR CH 1/16W 330 DTC124EUA TRANSISTOR NRSA63D-101X M.RESISTOR CH 1/16W 100 Q23-26...
  • Page 265 Ref.No. Part No. Part Name & Description Remarks Ref.No. Part No. Part Name & Description Remarks R108 NRSA63J-152X M.RESISTOR CH 1/16W 1.5K R303 NRSA63J-222X M.RESISTOR CH 1/16W 2.2K R109 NRSA63D-182X M.RESISTOR CH 1/16W 1.8K R304 NRSA63J-221X M.RESISTOR CH 1/16W 220 R110 NRSA63D-102X M.RESISTOR CH 1/16W...
  • Page 266 Ref.No. Part No. Part Name & Description Remarks Ref.No. Part No. Part Name & Description Remarks R611 NRSA63D-332X M.RESISTOR CH 1/16W 3.3K R2024 NRSA63J-332X M.RESISTOR CH 1/16W 3.3K R612 NRSA63J-104X M.RESISTOR CH 1/16W 100K R2025,26 NRSA63J-0R0X M.RESISTOR CH 1/16W R613 NRSA63J-0R0X M.RESISTOR CH 1/16W R2031,32...
  • Page 267 Ref.No. Part No. Part Name & Description Remarks Ref.No. Part No. Part Name & Description Remarks R3045 NRSA63J-332X M.RESISTOR CH 1/16W 3.3K R201-04 NRSA63J-0R0X M.RESISTOR CH 1/16W R3046 NRSA63D-472X M.RESISTOR CH 1/16W 4.7K R3048 NRSA63D-332X M.RESISTOR CH 1/16W 3.3K R3049 NRSA63D-152X M.RESISTOR CH 1/16W 1.5K R3050...
  • Page 268 Ref.No. Part No. Part Name & Description Remarks Ref.No. Part No. Part Name & Description Remarks C301,02 NCB31CK-104X C.CAPACITOR 16V 0.1U K103 NQR0265-001X FERAITE BEAD C303 NCF31AZ-105X C.CAPACITOR K401,02 NQR0265-001X FERAITE BEAD C304 NCB31CK-104X C.CAPACITOR 16V 0.1U C305 NCF31AZ-105X C.CAPACITOR L1-L4 NQL044K-100X COIL...
  • Page 269 Ref.No. Part No. Part Name & Description Remarks Ref.No. Part No. Part Name & Description Remarks R330-34 NRSA63J-103X M.RESISTOR CH 1/16W 10K C142 NCB31CK-104X C.CAPACITOR 16V 0.1U R335 NRSA63J-0R0X M.RESISTOR CH 1/16W C143 NCB31CK-223X C.CAPACITOR 16V 0.022U R336-52 NRSA63J-103X M.RESISTOR CH 1/16W 10K C144 NCB31CK-473X C.CAPACITOR...
  • Page 270 Ref.No. Part No. Part Name & Description Remarks Ref.No. Part No. Part Name & Description Remarks DAP222 DIODE R124,25 NRSA63J-102X M.RESISTOR CH 1/16W MA3110L ZENER DIODE R126 NRSA63J-274X M.RESISTOR CH 1/16W 270K DAP222 DIODE R127 NRSA63J-272X M.RESISTOR CH 1/16W 2.7K MA3020 ZENER DIODE R128...
  • Page 271 Ref.No. Part No. Part Name & Description Remarks Ref.No. Part No. Part Name & Description Remarks R402,03 NRSA63J-0R0X M.RESISTOR CH 1/16W R404 NRSA63D-472X M.RESISTOR CH 1/16W 4.7K R405 NRSA63D-332X M.RESISTOR CH 1/16W 3.3K R406,07 NRSA63D-472X M.RESISTOR CH 1/16W 4.7K R408 NRSA63D-473X M.RESISTOR CH 1/16W 47K R409...
  • Page 272 SECTION 3 ELECTRICAL ADJUSTMENTS PRECAUTIONS FOR ELECTRICAL ADJUSTMENTS 3.1.3 Signals required for adjustments NTSC and PAL color bar signals are required on “3.3 VIDEO Electrical adjustments should be performed only when they are SYSTEM ADJUTMENT”. required, for example, during maintenance. Electrical adjust- ments that are possible only after mechanism adjustments NTSC: should be performed after completing these.
  • Page 273 3.1.4 Notes for adjustments 3.1.5 Adjustment menu Since the AG-DV2500 is compatible with the recording and play- (1) Operation method Use the ADJUST MENU for adjustments. The operating method back of the NTSC and PAL signals, it is required that both NTSC and PAL be adjusted.
  • Page 274 [PAL] Y level White Sync Burst YL/B CY/R G/MG Type [mVp-p] [mV] [mV] [mVp-p] [mVp-p] [mVp-p] [mVp-p] 1000 Y 100%, color 100% level Y 100%, color 75% level 1000 YL/B: Yellow and Blue level. CY/R: Cyan and Red level. G/MG: Green and Magenta level. Table 3.1.4 (2) Adjustment items and initial data The initial values are merely the typical values, which are written automatically after the EEP-ROM replacement, etc.
  • Page 275 DVC UNIT ADJUSTMENTS Preparation : Connect the Rewrite board (VFK1846) to CN4004 on the Main board. Connect it in the ori- entation shown in Fig. 3.2, so that the test point surface (component mounting surface) faces to- ward the rear. NOTE : DVC UNIT ADJUSTMENTS can be completed if NTSC mode is performed.
  • Page 276 Measuring point ( * ) Measuring Adjustment parts ( - ) Item instruments & Mode Adjustment procedure Adjustment level ( + ) Input signals (4) Measure TP6 (SPA) by triggering TP5 (HID) and confirm that the values a and b are within the specified ranges.
  • Page 277 Measuring Measuring point Item instruments & Mode Adjustment parts ( Adjustment procedure Input signals Adjustment level ( ME SP VCO Recording tape • Self-REC/ Monitor display (Notes) offset (brand-new tape) PLAY [PLAY] and [STOP] • Be sure to use a brand-new tape for the ME adjustment •...
  • Page 278 Measuring Measuring point Item instruments & Mode Adjustment parts ( Adjustment procedure Input signals Adjustment level ( FS PLL 48 Frequency TP4 (FS PLL) (1)Select ADJUST MENU No. 110, "FS PLL 48 kHz adjust- counter ADJUST GND: TP1 (GND) kHz". ment No input MENU, 110.
  • Page 279 VIDEO SYSTEM ADJUSTMENTS • Use NTSC signals for the NTSC adjustments and PAL signals for the PAL adjustments. • Use the specified signals to make adjustments whenever possible. When there are no specified signals, please refer to the “3.1.4 Notes for adjustments”. •...
  • Page 280 Measuring Measuring point Item instruments & Mode Adjustment parts ( Adjustment procedure Input signals Adjustment level ( NTSC PB WFM (NTSC) or C OUT (Y/C jack) (75 (1)Set the INPUT SELECT SW to LINE or Y/C. BURST level oscilloscope ADJUST terminated) (2)Select ADJUST MENU No.
  • Page 281 Measuring Measuring point Item instruments & Mode Adjustment parts ( Adjustment procedure Input signals Adjustment level ( NTSC Y/C IN WFM (NTSC) or C OUT (Y/C jack) (75 (1)Set the INPUT SELECT SW to LINE or Y/C. REC C level oscilloscope ADJUST terminated)
  • Page 282 Measuring point ( * ) Measuring Adjustment parts ( - ) Item instruments & Mode Adjustment procedure Adjustment level ( + ) Input signals * C OUT (Y/C jack) (75 ! 10 NTSC LINE IN WFM (NTSC) or (1) Set the INPUT SELECT SW to LINE or Y/C. ADJUST (2) Select ADJUST MENU No.
  • Page 283 Measuring point ( * ) Measuring Adjustment parts ( - ) Item instruments & Mode Adjustment procedure Adjustment level ( + ) Input signals * Y OUT (Y/C jack) (75 ! 13 NTSC LINE IN WFM (NTSC) or (1) Set the INPUT SELECT SW to LINE or Y/C. ADJUST (2) Select ADJUST MENU No.
  • Page 284 Measuring point ( * ) Measuring Adjustment parts ( - ) Item instruments & Mode Adjustment procedure Adjustment level ( + ) Input signals * Y OUT (Y/C jack) (75 ! 16 NTSC PB WFM (NTSC) or (1) Set the INPUT SELECT SW to LINE or Y/C. SETUP level oscilloscope ADJUST...
  • Page 285 Measuring Measuring point Item instruments & Mode Adjustment parts ( Adjustment procedure Input signals Adjustment level ( 19 NTSC PB WFM (NTSC) or C OUT (Y/C jack) (75 (1)Set the INPUT SELECT SW to LINE or Y/C. BURST level oscilloscope ADJUST terminated) (2)Select ADJUST MENU No.
  • Page 286 Measuring Measuring point Item instruments & Mode Adjustment parts ( Adjustment procedure Input signals Adjustment level ( 22 NTSC Y/C IN WFM (NTSC) or C OUT (Y/C jack) (75 (1)Set the INPUT SELECT SW to LINE or Y/C. REC SETUP oscilloscope ADJUST terminated)
  • Page 287 Measuring point ( * ) Measuring Adjustment parts ( - ) Item instruments & Mode Adjustment procedure Adjustment level ( + ) Input signals * C OUT (Y/C jack) (75 ! 25 NTSC LINE IN WFM (NTSC) or (1) Set the INPUT SELECT SW to LINE or Y/C. ADJUST (2) Select ADJUST MENU No.
  • Page 288 Measuring point ( * ) Measuring Adjustment parts ( - ) Item instruments & Mode Adjustment procedure Adjustment level ( + ) Input signals * Y OUT (Y/C jack) (75 ! 28 NTSC LINE IN WFM (NTSC) or (1) Set the INPUT SELECT SW to LINE or Y/C. (2) Select ADJUST MENU No.
  • Page 289 Measuring point ( * ) Measuring Adjustment parts ( - ) Item instruments & Mode Adjustment procedure Adjustment level ( + ) Input signals (2) PAL circuit adjustments Set the [NTSC /PAL] switch of rear panel to “PAL”. * Y OUT (Y/C jack) (75 ! 30 PAL PB Y WFM (PAL) or (1) Set the INPUT SELECT SW to LINE or Y/C.
  • Page 290 Measuring Measuring point Item instruments & Mode Adjustment parts ( Adjustment procedure Input signals Adjustment level ( 33 PAL PB WFM (PAL) or C OUT (Y/C jack) (75 (1)Set the INPUT SELECT SW to LINE or Y/C. BURST level oscilloscope ADJUST terminated) (2)Select ADJUST MENU No.
  • Page 291 Measuring Measuring point Item instruments & Mode Adjustment parts ( Adjustment procedure Input signals Adjustment level ( 36 PAL Y/C IN WFM (PAL) or C OUT (Y/C jack) (75 (1)Set the INPUT SELECT SW to LINE or Y/C. REC C level oscilloscope ADJUST terminated)
  • Page 292 Measuring Measuring point Item instruments & Mode Adjustment parts ( Adjustment procedure Input signals Adjustment level ( 39 PAL LINE IN WFM (PAL) or C OUT (Y/C jack) (75 (1)Set the INPUT SELECT SW to LINE or Y/C. REC C level oscilloscope ADJUST terminated)
  • Page 293 Measuring point ( * ) Measuring Adjustment parts ( - ) Item instruments & Mode Adjustment procedure Adjustment level ( + ) Input signals * Y OUT (Y/C jack) (75 ! 42 PAL LINE IN WFM (PAL) or (1) Set the INPUT SELECT SW to LINE or Y/C. EE Y level oscilloscope ADJUST...
  • Page 294 REWRITE BOARD SCHEMATIC DIAGRAM AG-DV2500 Initial Parameter Not used Not used ON : Enable to rewrite VTR (MSD) ON : Enable to rewrite SYS CPU Not used ON : Enable to rewrite VTR (MSD) CPU ((Note) Not used Not used (Note : When rewriting the VTR (MSD) firmware, both of switch S1 - 1 and 4 should be set to “ON”.
  • Page 295 5.13 FDM (FRONT, DV CONN & MIC) SCHEMATIC DIAGRAMS (Page 5-16) (Page 5-9 ) (Page 5-12)
  • Page 296 5.17 IC BLOCK DIAGRAMS...
  • Page 306 5.1 INDEX TO PAGES OF MAIN BOARDS AND CIRCUIT BOARD LOCATION 5.1.1 Circuit board location DV/CPU BOARD MECHA CONN BOARD ASSEMBLY ASSEMBLY 1 MDA/DC BOARD ASSEMBLY MECHA BOARD ASSEMBLY DV CONN BOARD ASSEMBLY MIC BOARD ASSEMBLY FRONT BOARD MAIN BOARD ASSEMBLY ASSEMBLY Page of diagram...

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