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Philips VR550 Service Manual

Video cassette recorder
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Video Cassette Recorder
Service
Service
Service
Service Manual
Contents
Chapter
Sec. 1:
Adjustment Procedure
Schematic Diagrams and CBA's
Exploded Views
Mechanical and Electrical Parts Lists
Sec. 2: Standard Maintenance
Mechanism Alignment Procedures
Disassembly / Assembly of Mechanism
Deck Exploded Views
Safety regulations require that the set be restored to its original
condition and that parts which are identical with those specified
be used.
Published by BK 2004 Video Service Department
VR550
Survey of versions:
/02
PAL B/G
/07
PAL I, UK/IRELAND
/16
PAL B/G, Spain
/39
PAL/SECAM-BG+PAL/SECAM-L/L',FRANCE
/58
PAL-BG/DK+SECAM-BG/DK,EAST-EURO
Printed in Japan
c Copyright reserved
/02/07/16
Subject to modification
GB
3103 785 22260

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  Summary of Contents for Philips VR550

  • Page 1 Video Cassette Recorder Service VR550 /02/07/16 Service Service Service Manual Contents Survey of versions: PAL B/G Chapter PAL I, UK/IRELAND PAL B/G, Spain Sec. 1: Adjustment Procedure PAL/SECAM-BG+PAL/SECAM-L/L',FRANCE Schematic Diagrams and CBA's Exploded Views PAL-BG/DK+SECAM-BG/DK,EAST-EURO Mechanical and Electrical Parts Lists Sec.
  • Page 2: Table Of Contents

    MAIN SECTION VIDEO CASSETTE RECORDER Sec. 1: Main Section I Adjustment Procedures I Schematic Diagrams and CBA’s I Exploded Views I Mechanical and Electrical Parts List TABLE OF CONTENTS IMPORTANT SAFETY PRECAUTIONS ............1-1-1 STANDARD NOTES FOR SERVICING .
  • Page 3: Important Safety Precautions

    IMPORTANT SAFETY PRECAUTIONS Product Safety Notice J. Use care that foreign objects (screws, solder drop- lets, etc.) do not remain inside the set. Some electrical and mechanical parts have special K. Crimp type wire connector safety-related characteristics which are often not evi- The power transformer uses crimp type connectors dent from visual inspection, nor can the protection they which connect the power cord and the primary side...
  • Page 4 Safety Check after Servicing Chassis or Secondary Conductor Examine the area surrounding the repaired location for damage or deterioration. Observe that screws, parts, and wires have been returned to their original posi- Primary Circuit Terminals tions. Afterwards, do the following tests and confirm the specified values to verify compliance with safety standards.
  • Page 5: Standard Notes For Servicing

    STANDARD NOTES FOR SERVICING Circuit Board Indications Pb (Lead) Free Solder When soldering, be sure to use the Pb free solder. a. The output pin of the 3 pin Regulator ICs is indi- cated as shown. How to Remove / Install Flat Pack-IC Top View Bottom View 1.
  • Page 6 3. The flat pack-IC on the CBA is affixed with glue, so With Soldering Iron: be careful not to break or damage the foil of each (1) Using desoldering braid, remove the solder from all pin or the solder lands under the IC when removing pins of the flat pack-IC.
  • Page 7 (4) Bottom of the flat pack-IC is fixed with glue to the 2. Installation CBA; when removing entire flat pack-IC, first apply (1) Using desoldering braid, remove the solder from soldering iron to center of the flat pack-IC and heat the foil of each pin of the flat pack-IC on the CBA so up.
  • Page 8 Instructions for Handling Semi-conductors Electrostatic breakdown of the semi-conductors may occur due to a potential difference caused by electro- static charge during unpacking or repair work. 1. Ground for Human Body Be sure to wear a grounding band (1MΩ) that is prop- erly grounded to remove any static electricity that may be charged on the body.
  • Page 9: Function Indicator Symbols

    FUNCTION INDICATOR SYMBOLS Note: The following symbols will appear on the indicator panel to indicate the current mode or operation of the VCR. On-screen modes will also be momentarily displayed on the tv screen when you press the operation buttons. Display panel MODE INDICATOR ACTIVE...
  • Page 10 TV screen Note: OSD for mechanical error will be displayed for 5 sec. after the mechanical error occurs. When reel and capstan mechanism is not functioning When the drum is not working properly correctly EJECT R EJECT D Fig. 1 Fig.
  • Page 11: Preparation For Servicing

    PREPARATION FOR SERVICING How to Enter the Service Mode About Optical Sensors Caution: An optical sensor system is used for the Tape Start and End Sensors on this equipment. Carefully read and follow the instructions below. Otherwise the unit may operate erratically. What to do for preparation Insert a tape into the Deck Mechanism Assembly and press the PLAY button.
  • Page 12: Operating Controls And Functions

    To eliminate the TV’s sound. Press again to restore the volume. – TV-VOL TV-VOL To adjust the TV’s volume. TV-PROG. + TV-PROG. – To select a programme number on the TV. You can use this remote control to operate some functions of Philips TVs. 1-5-1 HG470IB...
  • Page 13 Front of your VCR STANDBY/ON PROGRAMME RECORD STOP/EJECT PLAY To switch off or on, interrupt menu function. STANDBY/ON PROGRAMME+ PROGRAMME- To select the programme number. During normal or slow motion playback, press to adjust the tracking. RECORD To record the TV channel selected at this moment. FWD.
  • Page 14: Signal Name Abbreviations

    SIGNAL NAME ABBREVIATIONS Signal Name Function Signal Name Function CLKSEL Clock Select (GND) SCART 16Pin Control Signal Playback/Record Control Signal CTL (+) SCART 1 8Pin Output Control 8POUT-1 Signal Playback/Record Control Signal CTL (-) SCART 2 8Pin Output Control 8POUT-2 Signal CTLAMPout To Monitor for CTL AMP Output...
  • Page 15 Signal Name Function Signal Name Function MOD-A Modulator Audio Output Signal Video Envelope Comparator V-ENV Signal N-A-PB Normal Audio Playback V-IN Video Signal Input N-A-REC Normal Audio Recording V-OUT Video Signal Output OSCin Clock Input for letter size OSCout Clock Output for letter size VIDEO Video Signal OSD-V-IN...
  • Page 16: Cabinet Disassembly Instructions

    CABINET DISASSEMBLY INSTRUCTIONS 1. Disassembly Flowchart (1): Identification (location) No. of parts in the figures (2): Name of the part This flowchart indicates the disassembly steps to gain (3): Figure Number for reference access to item(s) to be serviced. When reassembling, (4): Identification of parts to be removed, unhooked, follow the steps in reverse order.
  • Page 17 (S-2) (S-1) (S-3) (S-1) (S-2) (S-2) (S-4) [3] VCR Chassis Unit (S-3) (S-2) [1] Top Case (S-1) Fig. D1 (L-2) (L-2) Fig. D3 [4] Jack CBA (S-5) Desolder [2] Front Assembly (L-1) Fig. D2 Fig. D4 1-7-2 HG470DC...
  • Page 18 [7] Cylinder Shield Cylinder Assembly FE Head (S-7) SW507 ACE Head LD-SW Assembly [6] Main CBA [5] Deck Assembly [5] Deck Assembly Cam Gear [6] Main CBA Hole Shaft (S-6) Hole LD-SW [6] Main CBA (S-6) Fig. D6 TOP VIEW From Capstan Motor From...
  • Page 19: Electrical Adjustment Instructions

    ELECTRICAL ADJUSTMENT INSTRUCTIONS General Note: "CBA" is an abbreviation for Head Switching Position Adjustment "Circuit Board Assembly." Purpose: NOTE: To determine the Head Switching point during 1.Electrical adjustments are required after replacing playback. circuit components and certain mechanical parts. Symptom of Misadjustment: It is important to do these adjustments only after all repairs and replacements have been com- May cause Head Switching noise or vertical jitter...
  • Page 20 Adjustment Points and Test Points Main CBA Top View AUDIO BLOCK POWER SUPPLY TUNER BLOCK BLOCK Hi-Fi BLOCK VIDEO BLOCK V-OUT POWER SYSCON/TIMER SERVO BLOCK BLOCK TP507 TP502 S-INH RF-SW TP301 C-PB VR501 TP501 SW-POINT TEST POINT INFORMATION : Indicates a test point with a jumper wire across a hole in the PCB. TEST POINTS NOT USED IN ELECTRICAL ADJUSTMENTS Test Point Used in:...
  • Page 21: Block Diagrams

    BLOCK DIAGRAMS Servo/System Control Block Diagram HG470BLS 1-9-1...
  • Page 22 Video Block Diagram HG470BLV 1-9-2...
  • Page 23 Audio Block Diagram HG470BLA 1-9-3...
  • Page 24 Hi-Fi Audio Block Diagram HG470BLH 1-9-4...
  • Page 25 Power Supply Block Diagram HG470BLP 1-9-5...
  • Page 26: Schematic Diagrams / Cba's And Test Points

    SCHEMATIC DIAGRAMS / CBA'S AND TEST POINTS Standard Notes Notes: WARNING 1. Do not use the part number shown on these draw- ings for ordering. The correct part number is Many electrical and mechanical parts in this chassis shown in the parts list, and may be slightly different have special characteristics.
  • Page 27 Main 1/6 Schematic Diagram Parts Location Guide Ref No. Position Ref No. Position Ref No. Position CAPACITORS CONNECTORS RESISTORS C501 C862 R522 C502 CL501 R523 C506 CL502 R524 C508 CL504 R525 C510 DIODES R526 C511 D501 R527 C512 D502 R528 C513 D552 R529...
  • Page 28 REC MODE MODEL MARK 0.00 ~ 0.51V POWER STOP/EJECT (2.5) 0.51 ~ 0.92V CH DOWN VR550/02 THE SAME VOLTAGE FOR INDICATES THAT THE VOLTAGE 0.92 ~ 1.27V CH UP PLAY VR550/07 IS NOT CONSISTENT HERE. BOTH PLAY & REC MODES.
  • Page 29 Main 2/6 & Sensor Schematic Diagrams Models and Marks MODE: SP/REC “ “ = SMD PLAY MODE REC MODE MODEL MARK (2.5) VR550/02 THE SAME VOLTAGE FOR INDICATES THAT THE VOLTAGE VR550/07 BOTH PLAY & REC MODES. IS NOT CONSISTENT HERE. VR550/16 1-10-6 1-10-5 HG470SCM2...
  • Page 30 MAIN 2/6 Schematic Diagram Parts Location Guide Ref No. Position Ref No. Position CAPACITORS RESISTORS C538 R539 C540 R540 C561 R541 C562 R542 C564 R543 C701 R544 C702 R545 C704 R546 C706 R547 C708 R548 C716 R549 C717 R566 CONNECTORS R701 CL505 R702...
  • Page 31 MAIN 3/6 Schematic Diagram Parts Location Guide Ref No. Position Ref No. Position Ref No. Position Ref No. Position CAPACITORS CAPACITORS TRANSISTORS RESISTORS C251 C347 Q401 R402 C252 C351 Q402 R403 C253 C352 Q403 R404 C254 C401 Q405 R407 C302 C402 Q406 R408...
  • Page 32 Main 3/6 Schematic Diagram MODE: SP/REC “ “ = SMD PLAY MODE REC MODE (2.5) THE SAME VOLTAGE FOR INDICATES THAT THE VOLTAGE BOTH PLAY & REC MODES. IS NOT CONSISTENT HERE. 1-10-9 1-10-10 HG470SCM3...
  • Page 33 Main 4/6 & Jack Schematic Diagrams MODE: SP/REC “ “ = SMD PLAY MODE REC MODE (2.5) INDICATES THAT THE VOLTAGE THE SAME VOLTAGE FOR BOTH PLAY & REC MODES. IS NOT CONSISTENT HERE. HG470SCM4 1-10-11 1-10-12...
  • Page 34 MAIN 4/6 Schematic Diagram Parts Location Guide Ref No. Position CAPACITORS C157 C158 CONNECTORS CL151 CL152 DIODES D153 D154 D155 D156 TRANSISTOR Q153 RESISTOR R158 TEST POINT JACK Schematic Diagram Parts Location Guide Ref No. Position Ref No. Position CAPACITORS TRANSISTORS C101 Q101...
  • Page 35 MAIN 5/6 Schematic Diagram Parts Location Guide Ref No. Position Ref No. Position Ref No. Position CAPACITORS DIODES RESISTORS C002 D023 AA-1 R008 C003 D051 BB-2 R009 C004 D052 CC-3 R011 C005 D053 BB-2 R012 C006 D055 BB-2 R013 C007 D056 AA-2 R014...
  • Page 36 Comparison Chart of Models and Marks MODEL MARK CAUTION ! CAUTION ! VR550/02 MODE: SP/REC PLAY MODE For continued protection against fire hazard, Fixed voltage ( or Auto voltage selectable ) power supply circuit is used in this unit. VR550/07 REC MODE replace only with the same type fuse.
  • Page 37 Main 6/6 Schematic Diagram MODE: SP/REC PLAY MODE REC MODE (2.5) INDICATES THAT THE VOLTAGE THE SAME VOLTAGE FOR BOTH PLAY & REC MODES. IS NOT CONSISTENT HERE. “ “ = SMD 1-10-17 1-10-18 HG470SCM6...
  • Page 38 Main CBA Top View CAUTION ! BECAUSE A HOT CHASSIS GROUND IS PRESENT IN THE POWER CAUTION ! For continued protection against fire hazard, SUPPLY CIRCUIT , AN ISOLATION TRANSFORMER MUST BE USED. Fixed voltage ( or Auto voltage selectable ) power supply circuit is used in this unit. replace only with the same type fuse.
  • Page 39 Main CBA Bottom View CAUTION ! BECAUSE A HOT CHASSIS GROUND IS PRESENT IN THE POWER CAUTION ! For continued protection against fire hazard, SUPPLY CIRCUIT , AN ISOLATION TRANSFORMER MUST BE USED. Fixed voltage ( or Auto voltage selectable ) power supply circuit is used in this unit. replace only with the same type fuse.
  • Page 40 Main CBA Parts Location Guide Ref No. Position Ref No. Position Ref No. Position Ref No. Position Ref No. Position Ref No. Position Ref No. Position Ref No. Position Ref No. Position CAPACITORS CAPACITORS CAPACITORS CAPACITORS RESISTORS RESISTORS RESISTORS RESISTORS C002 C337 C479...
  • Page 41 Jack CBA Top View Jack CBA Parts Location Guide Ref No. Position Ref No. Position CAPACITORS TRANSISTORS C101 Q101 C102 Q102 C103 RESISTORS C104 R101 C105 R103 C107 R104 C108 R106 C109 R108 C110 R109 C111 R110 C112 R112 C113 R113 C115 R115...
  • Page 42 Comparison Chart of Models and Marks MODE: SP/REC “ “ = SMD PLAY MODE MODEL MARK REC MODE VR550/02 (2.5) VR550/07 THE SAME VOLTAGE FOR INDICATES THAT THE VOLTAGE VR550/16 IS NOT CONSISTENT HERE. BOTH PLAY & REC MODES. AFV Schematic Diagram Parts Location Guide Ref No.
  • Page 43 AFV CBA Top View AFV CBA Bottom View AFV CBA Parts Location Guide Ref No. Position CAPACITORS DIODE COILS RESISTORS CRYSTAL OSCILLATOR 1-10-30 1-10-29 BHC400F01093...
  • Page 44: Waveforms

    WAVEFORMS (TP301 of Main CBA) UPPER (TP502 of Main CBA) LOWER C-PB 10mV x 10 RF-SW 0.5V x 10 5msec (J23 of Main CBA) UPPER (TP502 of Main CBA) LOWER V-OUT 0.1V x 10 RF-SW 0.5V x 10 50usec (J23 of Main CBA) V-OUT E-E 10usec 50mV x 10...
  • Page 45: Wiring Diagram

    WIRING DIAGRAM 1-12-1 HG470WI...
  • Page 46: System Control Timing Charts

    SYSTEM CONTROL TIMING CHARTS Mode SW : LD-SW LD-SW Position detection A/D Input voltage Limit Symbol (Calculated voltage) 3.76V~4.50V (4.12V) 4.51V~5.00V (5.00V) 0.00V~0.25V (0.00V) 1.06V~1.50V (1.21V) 0.66V~1.05V (0.91V) 1.99V~2.60V (2.17V) 1.51V~1.98V (1.80V) 3.20V~3.75V (3.40V) 0.26V~0.65V (0.44V) 4.51V~5.00V (5.00V) 2.61V~3.19V (2.97V) Note : Note: RS: Loading FWD (LM-FWD “H”, LM-REV “L”)
  • Page 47 Still/Slow Control Frame Advance Timing Chart 1) SP Mode 18 RF-SW The first rise of RF-SW after a rise in F-AD signal F-AD (Internal Signal) "H" "H" "Z" C-DRIVE "L" "L" Stop detection (T2) Acceleration Detection (T1) Slow Tracking Value PB CTL Reversal Limit Value 20ms...
  • Page 48 2) LP/SLP Mode 18 RF-SW The first rise of RF-SW after a rise in F-AD signal F-AD (Internal Signal) "H" "H" "Z" C-DRIVE "L" "L" Stop detection (T2) Acceleration Detection (T1) Slow Tracking Value PB CTL Reversal Limit Value 20ms 78 C-F/R 16 H-A-SW 15 ROTA...
  • Page 49 EJECT ST-S/ END-S "OFF" CASS.LOAD LD-FWD 0.2s LD-REV 0.7s LD-FWD 0.4s LD-FWD 0.5s LD-REV STOP(A) PLAY LD-FWD PLAY LD-FWD LD-REV 0.2s LD-FWD PLAY PLAY PAUSE (SLOW) LD-FWD STILL(SLOW) PLAY LD-REV 0.2s LD-FWD PLAY STOP /EJECT LD-REV STOP(A) 1-13-4 HG470TI...
  • Page 50 STOP(A) STOP LD-REV 0.2s LD-FWD STOP /EJECT LD-FWD 2.5s LD-FWD 0.5s LD-REV STOP(A) LD-REV 0.2s LD-FWD STOP /EJECT LD-FWD 2.5s LD-FWD 0.5s LD-REV STOP(A) LD-FWD PAUSE LD-FWD 2.5s Short REV LD-REV 0.2s LD-FWD REC PAUSE REC or PAUSE STOP /EJECT LD-FWD 1.0s LD-REV...
  • Page 51: Ic Pin Function Descriptions

    IC PIN FUNCTION DESCRIPTIONS IC501( SERVO / SYSTEM CONTROL IC ) Signal Active Function Name Level “H” ≥ 4.5V, “L” ≤ 1.0V SCART 2 RGB 27 OUT RGB- Signal Active Through Control Function THROUGH Name Level Signal Input Signal from Pin 28 OUT LINE- Audio Mute Control IN SC2-IN...
  • Page 52 Signal Active Signal Active Function Function Name Level Name Level Composite IN P-DOWN-L Power Voltage Down IN C-SYNC PULSE Synchronized Pulse Detector Signal SCART 1 8Pin Capstan Motor 59 OUT 8POUT-1 IN C-FG PULSE Output Control Rotation Detection Signal Pulse SCART 2 8Pin N.U.
  • Page 53: Lead Identifications

    LEAD IDENTIFICATIONS KIA339F EL 2SC2785(F,H,J) 2SA1015-GR(TPE2) LM339DT BA1F4M-T 2SA1020(Y) BN1F4M-T 2SC1815-BL(TPE2) BN1L4M-T 2SC1815-GR(TPE2) KRA103M 2SC1815-Y(TPE2) KRA104M 2SC2120-Y(TPE2) KRC103M 2SC3266-Y(TPE2) KTA1266(GR) KTA1267(GR,Y) KTA1281(Y) KTC3203(Y) KTC3199(BL,GR,Y) KTC3205(Y) PT6958-FN-TP E C B E C B EL817A 2SK3566 EL817B BR24L02F-WE2 EL817C CAT24WC02JI LTV-817B-F LTV-817C-F PS2561A-1(Q,W) LA71750EM-MPB-E QSZAC0RMB188...
  • Page 54: Electrical Parts List

    PRODUCT SAFETY NOTE: Products marked with a h have special characteristics important to safety. Before replacing any of these components, read carefully the product safety notice in this service manual. Don't degrade the safety of the product through improper servicing. NOTES: Parts that not assigned part numbers (-----------) are not available.
  • Page 55 ELECTRICAL PARTS LIST Pos. 12 NC Description C303 ELECTROLYTIC CAP. 1UF/50V M H7 C304 ELECTROLYTIC CAP. 1UF/50V M H7 C305 CHIP CERAMIC CAP. F Z 0.22UF/16V C307 CHIP CERAMIC CAP.(1608) B K 0.047UF/50V C308 CHIP CERAMIC CAP.(1608) B K 0.022UF/50V C309 CHIP CERAMIC CAP.(1608) F Z 0.1UF/50V C310...
  • Page 56 ELECTRICAL PARTS LIST Pos. 12 NC Description C457 ELECTROLYTIC CAP. 10UF/16V M H7 C458 ELECTROLYTIC CAP. 4.7UF/25V M H7 C459 CHIP CERAMIC CAP.(1608) B K 0.01UF/50V C460 CHIP CERAMIC CAP.(1608) B K 4700PF/50V C461 ELECTROLYTIC CAP. 22UF/10V M H7 C462 CHIP CERAMIC CAP.(1608) B K 0.01UF/50V C463 CHIP CERAMIC CAP.(1608) B K 0.01UF/50V...
  • Page 57 ELECTRICAL PARTS LIST Pos. 12 NC Description C704 CHIP CERAMIC CAP.(1608) B K 0.01UF/50V C706 CHIP CERAMIC CAP.(1608) F Z 0.1UF/50V C708 CHIP CERAMIC CAP.(1608) B K 0.01UF/50V C716 CHIP CERAMIC CAP. F Z 0.22UF/16V C717 CHIP CERAMIC CAP. F Z 0.22UF/16V C771 CHIP CERAMIC CAP.(1608) F Z 0.1UF/50V C772...
  • Page 58 ELECTRICAL PARTS LIST Pos. 12 NC Description FP562 9965 000 23357 LED DISPLAY LFU-4421-2003A IC’s IC001 4822 130 11655 PHOTOCOUPLER LTV-817B-F IC301 9965 000 12180 IC:Y/C/A LA71750EM-MPB-E IC451 9965 000 16618 IC:HIFI LA72648M-MPB-E IC501 9965 000 23358 SYSCON IC M3776AMCA-AB4GP IC503 9965 000 16620 IC:EEPROM CAT24WC02JI IC561...
  • Page 59 ELECTRICAL PARTS LIST Pos. 12 NC Description R005 CARBON RES. 1/6W G 680 OHM R006 METAL OXIDE FILM RES. 1W J 1.8 OHM R007 CARBON RES. 1/6W J 22K OHM R008 CARBON RES. 1/6W J 100K OHM R009 CARBON RES. 1/6W G 3.3K OHM R011 CARBON RES.
  • Page 60 ELECTRICAL PARTS LIST Pos. 12 NC Description R334 CHIP RES.(1608) 1/10W 0 OHM R351 CHIP RES.(1608) 1/10W J 180 OHM R352 CHIP RES.(1608) 1/10W J 150 OHM R355 CARBON RES. 1/4W J 680 OHM R357 CHIP RES.(1608) 1/10W J 220 OHM R358 CHIP RES.(1608) 1/10W J 1.5K OHM R360...
  • Page 61 ELECTRICAL PARTS LIST Pos. 12 NC Description R511 CHIP RES.(1608) 1/10W J 100K OHM R513 CHIP RES.(1608) 1/10W J 2.2K OHM R514 CHIP RES.(1608) 1/10W J 820 OHM R516 CHIP RES.(1608) 1/10W J 330K OHM R517 CHIP RES.(1608) 1/10W J 560 OHM R518 CHIP RES.(1608) 1/10W J 470 OHM R520...
  • Page 62 ELECTRICAL PARTS LIST Pos. 12 NC Description R787 CHIP RES.(1608) 1/10W J 2.2K OHM R851 CHIP RES.(1608) 1/10W J 1.5K OHM R852 CHIP RES.(1608) 1/10W J 1K OHM R853 CHIP RES.(1608) 1/10W J 1K OHM RS501 9965 000 12191 REMOTE RECEIVER MIM-93M9DKF SA001 9965 000 08602 SURGE ABSORBER CNR-10D471K SWITCHES...
  • Page 63 ELECTRICAL PARTS LIST Pos. 12 NC Description R101 CARBON RES. 1/4W J 820 OHM R103 CARBON RES. 1/4W J 820 OHM R104 CARBON RES. 1/6W J 4.7K OHM R106 CARBON RES. 1/6W J 4.7K OHM R108 CARBON RES. 1/4W J 68 OHM R109 CHIP RES.(1608) 1/10W J 75 OHM R110...
  • Page 64: Exploded Views

    EXPLODED VIEWS Front Panel 1-17-1 HG470FEX...
  • Page 65 Cabinet 2L011 2B18 2L011 2L011 See Electrical Parts List for parts with this mark. Some Ref. Numbers are not in sequence. 2L011 JACK CBA 2L011 2L012 2L022 2L042 2L021 2L021 2L021 2L021 2L051 2L022 2L041 2L021 SENSOR CBA AFV CBA 2L031 2L041 MAIN CBA...
  • Page 66 [ A,C ] [ B ] X36A X36B X36C X45A X20G X20H X20I X20J X20K X36D X36E X36F X45B X36G X36H X36I X45C X36J X36K [ B ] Unit Comparison Chart of Models and Marks Model Mark VR550/02 VR550/07 VR550/16 1-17-3 HG470PEX...
  • Page 67: Mechanical Parts List

    PRODUCT SAFETY NOTE: Products marked with a h have special characteristics important to safety. Before replacing any of these components, read carefully the product safety notice in this service manual. Don’t degrade the safety of the product through improper servicing. MECHANICAL PARTS LIST Pos.
  • Page 68 DECK MECHANISM SECTION VIDEO CASSETTE RECORDER Sec. 2: Deck Mechanism Section I Standard Maintenance I Mechanism Alignment Procedures I Disassembly / Assembly of Mechanism I Deck Exploded Views I Deck Parts List TABLE OF CONTENTS STANDARD MAINTENANCE ............. . 2-1-1 SERVICE FIXTURE AND TOOLS .
  • Page 69: Standard Maintenance

    STANDARD MAINTENANCE Service Schedule of Components H: Hours : Check I: Change Deck Periodic Service Schedule Ref.No. Part Name 1,000 H 2,000 H 3,000 H 4,000 H Cylinder Assembly Loading Motor Assembly Pulley Assembly Tension Lever Assembly B587 ACE Head Assembly B573, B574 Reel S, Reel T Capstan Motor...
  • Page 70 Cleaning Cleaning of ACE Head Clean the head with a cotton swab. Cleaning of Video Head Procedure Clean the head with a head cleaning stick or chamois 1.Remove the top cabinet. cloth. 2.Dip the cotton swab in 90% isopropyl alcohol and Procedure clean the ACE Head.
  • Page 71: Service Fixture And Tools

    SERVICE FIXTURE AND TOOLS J-1-1, J-1-2 Ref. No. Name Part No. Adjustment J-1-1 Alignment Tape 9965 000 14514 Head Adjustment of ACE Head J-1-2 Alignment Tape 9965 000 14516 Azimuth and X Value Adjustment of ACE Head / (2 Head model) Adjustment of Envelope Waveform 9965 000 14515 (4 Head model)
  • Page 72: Mechanical Alignment Procedures

    MECHANICAL ALIGNMENT PROCEDURES Explanation of alignment for the tape to correctly run B. Method to place the Cassette Holder in the tape- starts on the next page. Refer to the information below loaded position without a cassette tape on this page if a tape gets stuck, for example, in the 1.
  • Page 73 1. Tape Interchangeability Alignment Note: To do these alignment procedures, make sure that the Tracking Control Circuit is set to the preset position every time a tape is loaded or unloaded. (Refer to page 2-3-4, procedure 1-C, step 2.) Equipment required: Dual Trace Oscilloscope VHS Alignment Tape (9965 000 14515) Guide Roller Adj.
  • Page 74 1-A. Preliminary/Final Checking and 4. If creasing or snaking is apparent, adjust the Tilt Alignment of Tape Path Adj. Screw of the ACE Head. (Fig. M6) Purpose: To make sure that the tape path is well stabilized. Azimuth Adj. Screw Symptom of Misalignment: If the tape path is unstable, the tape will be damaged.
  • Page 75 5. To shift the CTL waveform, press CH UP or CH 5. When Guide Rollers [2] and [3] (Refer to Fig. M3) DOWN button on the remote control unit. Then are aligned properly, there is no envelope drop make sure that the maximum output position of PB either at the beginning or end of track as shown in ±...
  • Page 76 1-D. Azimuth Alignment of Audio/Con- trol/ Erase Head Purpose: To correct the Azimuth alignment so that the Audio/ Control/Erase Head meets tape tracks properly. Symptom of Misalignment: If the position of the Audio/Control/Erase Head is not properly aligned, the Audio S/N Ratio or Frequency Response will be poor.
  • Page 77: Disassembly/Assembly Procedures Of Deck Mechanism

    DISASSEMBLY/ASSEMBLY PROCEDURES OF DECK MECHANISM Before following the procedures described below, be sure to remove the deck assembly from the cabinet. (Refer to CABINET DISASSEMBLY INSTRUCTIONS on page 1-7-1.) All the following procedures, including those for adjustment and replacement of parts, should be done in Eject mode;...
  • Page 78 REMOVAL INSTALLATION STEP START- REMOVE/*UNHOOK/ /LOC. PART ADJUSTMENT Fig. No. UNLOCK/RELEASE/ CONDITION UNPLUG/DESOLDER BT Arm DM2H, DM14H *(P-5) [33] [26] Loading Arm (SP) (+)Refer to Alignment [34] [26] DM2H, DM14H Assembly Sec.Page 2-5-1 Loading Arm (TU) (+)Refer to Alignment [35] [34] DM2H, DM14H Assembly...
  • Page 79 Top View [44] [45] [49] [46] [14] [13] [11] [15] [38] [10] [12] [37] [36] [43] [32] [41] [31] [40] [42] Fig. DM1H Bottom View [19] [35] [34] [25] [23] [24] [26] [27] [22] [28] [20] [33] Fig. DM2H 2-4-3 U29PHSDA...
  • Page 80 (S-1) (S-1) (L-1) (L-3) (L-2) (S-1A) (P-1) Installation of [3] and [6] First, insert [6] diagonally in [3] as shown below. Then, install [6] in [3] while pushing (L-1) in a direction of arrow. After installing [6] in [3], confirm that pin A of [3] enters hole A of [6] properly.
  • Page 81 [11] (S-4A) (L-4) [49] (P-3) [13] [50] Removal of [11] [12] (L-12) 1) Remove screw (S-4A). 2) Unhook spring (P-2). [10] Release (L-4) while (P-2) holding [12] with a finger. Loosen a finger holding [12] and remove [11]. (S-2) Pin of [12] Pin of [10] Groove of [27] When reassembling [10] and...
  • Page 82 Installation of [13] and [12] (S-5) [14] (S-6) [13] [15] Hook spring (P-3) up to [12] and [13], then install then to (P-3) the specified position so that [12] will be floated slightly while holding [12] and [13]. (Refer to Fig. A.) [12] Fig.
  • Page 83 (C-1) turn [22] (S-8) [20] (L-6) [21] [19] Cap Belt Pin on [22] Installation position of Cap Belt [20] Cap Belt [27] Position of pin on [22] Fig. DM12H [19] View for A Fig. DM11H 2-4-7 U29PHSDA...
  • Page 84 Installation of [26] [26] (C-3) Position of Mode Lever when installed Pin of [33] Pin of [37] (S-9) Pin of [36] (L-8) [23] (L-7) Bottom View [24] (C-5) [26] (C-4) (C-2) [28] [27] [25] [29] [30] Align [26] and [27] as shown. First groove on [27] [27] First tooth on [47]...
  • Page 85 [38] [36] [43] (P-6) turn [39] (L-10) turn [42] turn [47] [48] Slide [37] Fig. DM17H (C-7) [41] (C-6) [40] Fig. DM15H [45] [44] [46] (L-11) Fig. DM16H 2-4-9 U29PHSDA...
  • Page 86: Alignment Procedures Of Mechanism

    ALIGNMENT PROCEDURES OF MECHANISM The following procedures describe how to align the Alignment 1 individual gears and levers that make up the tape load- Loading Arm (SP) and (TU) Assembly ing/unloading mechanism. Since information about the state of the mechanism is provided to the System Install Loading Arm (SP) and (TU) Assembly so that Control Circuit only through the Mode Switch, it is their triangle marks point to each other as shown in...
  • Page 87: Deck Exploded Views

    DECK EXPLODED VIEWS Deck Mechanism View 1 Mark Description Floil G-684G or Multemp MH-D (Blue grease) SLIDUS OIL #150 B494 L1467 L1191 B553 B411 B567 L1053 B410 L1051 Chassis Assembly Top View (Lubricating Point) B501 L1450 L1450 L1466 B121 B126 B492 B571 Chassis Assembly...
  • Page 88 Deck Mechanism View 2 Mark Description Floil G-684G or Multemp MH-D (Blue grease) B587 B521 B487 SLIDUS OIL #150 B416 B591 SANKOUL FG84M (Yellow grease) B590 B522 L1406 B148 B573 B499 B508 B574 B592 B585 B558 B518 B564 B557 B414 B572 B565 L1151...
  • Page 89 Deck Mechanism View 3 Mark Description Floil G-684G or Multemp MH-D (Blue grease) L1321 SLIDUS OIL #150 B347 L1321 B355 B354 B483 L1341 B425 B482 B562 B300 B563 B313 B529 B360 B359 B361 B555 B303 Some Ref. Numbers are not in sequence. B514 2-6-3 U29P4HSDEX...
  • Page 90: Deck Parts List

    DECK PARTS LIST DECK PARTS LIST Pos. 12 NC Description Pos. 12 NC Description 9965 000 23362 CYLINDER ASS. PAL B518 4822 532 13159 P.S.W CUT 1.6X4.0X0.5T 9965 000 23363 LOADING MOTOR B521 9965 000 17220 REV BRAKE SPG(HI) 9965 000 16631 PULLEY ASS.(HI) B522 9965 000 08483...