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Allegro ABR521 Service Manual

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VCR+DVD RECORDER
MODEL : ABR521
P/NO : 3829RGN004P
APRIL, 2005

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Summary of Contents for Allegro ABR521

  • Page 1 VCR+DVD RECORDER MODEL : ABR521 P/NO : 3829RGN004P APRIL, 2005...

  • Page 2: Table Of Contents

    SECTION 1 SUMMARY CONTENTS PRODUCT SAFETY SERVICING GUIDELINES FOR VIDEO PRODUCTS ..... 1-2 SERVICING PRECAUTIONS ....................1-3 THE STEPS FOR CHANGE THE OPTION CODE ............1-4 UP-DATING PROGRAM ......................1-5 SPECIFICATIONS ........................1-7...

  • Page 3: Product Safety Servicing Guidelines For Video Products

    PRODUCT SAFETY SERVICING GUIDELINES FOR VIDEO PRODUCTS IMPORTANT SAFETY NOTICE A.C. Voltmeter This manual was prepared for use only by properly trained audio-video service technicians. When servicing this product, under no circumstances should the original design be modified or altered without permission from ALLEGRO Electronics Corporation.

  • Page 4: Servicing Precautions

    SERVICING PRECAUTIONS CAUTION: Before servicing the VCR + DVD RECODER cov- Electrostatically Sensitive (ES) Devices ered by this service data and its supplements and addends, Some semiconductor (solid state) devices can be damaged read and follow the SAFETY PRECAUTIONS. NOTE: if easily by static electricity.

  • Page 5: The Steps For Change The Option Code

    Note : This procedure must be done when IC304(On digital Board) or Digital Boardassy Push Switch POWER ON/ OFF at remocon or timer keyborad Select DVD MODE at the set DETECT NEW EEPROM (OPTION EDIT SCREEN) use remocon or timer keyborad ABR521 NAME OPT1 Push REC+ PLAY OPT2 at timer keyboard...

  • Page 6: Up-Dating Program

    UP-DATING PROGRAM BURNING DISC • For up-dating the DVD program using the disc, it must burning the disc which include the DVD software. • For recorder combi set which using the disc downloader program are DVD Program and Loader Program. •...
  • Page 7 DVD UPGRADE INSTRUCTION FORMAT NO 1 1. Press POWER KEY to turn on. 2. After booting, insert the upgrade disc, and you will see massage like [FIGURE 1] 3. Press “REC” key (front or remote) 3 times and you will see as [FIGURE 2] with remote Chose one of them then Press enter 4.

  • Page 8: Specifications

    SPECIFICATIONS General Power requirements AC 120V, 60 Hz Power consumption Dimensions (approx.) 430 X 78.5 X 354 mm (w x h x d) Mass (approx.) 5.7 kg Operating temperature 5°C to 35°C Operating humidity 5 % to 90 % Television system NTSC color system Recording format NTSC...
  • Page 9 SECTION 2 EXPLODED VIEWS CONTENTS EXPLODED VIEWS ........................2-2 1. Cabinet and Main Frame Section ...................2-2 2. Deck Mechanism Section (RL-05) ..................2-3 3. Packing Accessory Section ....................2-4...

  • Page 10: Exploded Views

    EXPLODED VIEWS 1. Cabinet and Main Frame Section...

  • Page 11: Deck Mechanism Section (Rl-05)

    2. Deck Mechanism Section (RL-05)

  • Page 12: Packing Accessory Section

    3. Packing Accessory Section OPTIONAL PARTS 810 CABLE ASS'Y RF CABLE(COAXIAL) PLUG ASS'Y 1WAY PLUG ASS'Y 2WAY BATTERY REMOCON INSTRUCTION ASSEMBLY FILTER PACKING PACKING BOX CARTON...
  • Page 13 SECTION 3 ELECTRICAL CONTENTS OVERALL WIRING DIAGRAM VDR PART ......3-2 VCR PART VDR ELECTRICAL TROUBLESHOOTING GUIDE ................3-66 1. POWER(SMPS) CIRCUIT ........3-66 ELECTRICAL ADJUSTMENT 2. NO COMPONENT VIDEO SIGNAL WHEN PROCEDURES ............3-3 PLAYING DISC ............3-68 3. NO COMPOSITE / S-VIDEO SIGNAL WHEN VCR ELECTRICAL TROUBLESHOOTING PLAYING DISC ............3-69 4.

  • Page 14: Overall Wiring Diagram

    OVERALL WIRING DIAGRAMS PN302 PM601 PM602 P103 PN301...

  • Page 15: Vcr Part

    VCR PART ELECTRICAL ADJUSTMENT PROCEDURES 1. Servo Adjustment 1) PG Adjustment • Test Equipment a) OSCILLOSCOPE : NTSC SP TEST TAPE • Adjustment And Specification MODE MEASUREMENT POINT ADJUSTMENT POINT SPECIFICATION V.Out PLAY R/C TRK JIG KEY 6.5 ± 0.5H H/SW(TP) •...

  • Page 16: Vcr Electrical Troubleshooting Guide

    VCR ELECTRICAL TROUBLESHOOTING GUIDE 1. Power(SMPS) CIRCUIT Is the D127 NO 5.3VA. Replace the D127 normal? Replace the F101 Is the D128 Is the F101 normal? Replace the D128 (Use the same Fuse) normal? Is the BD101 Power Line of Main Replace the BD101 Normal? PCB(VCR) is short...
  • Page 17 VCR ELECTRICAL TROUBLESHOOTING GUIDE (To Cap, Drum Motor ) No 12VA No REG 12V Is the Vcc(13V) Check or Replace Is the Vcc(13V) sup- Check or Replace supplied to C130? the D126 plied to Q126Collector? the D126 Is the D132 Is the Vcc(33V) sup- Check the ‘PWR CTL Replace the D132...
  • Page 18 VCR ELECTRICAL TROUBLESHOOTING GUIDE No 28V (HSR) Check or Replace Is the Vcc(30V) supplied to Q120 Collector? the D129 Check or Replace Is the Vcc(30V) sup- plied to Q120 Base? the ZD153 Check the ‘HSR “H” Is the Vcc(33V) supplied to Q121 Collector? signal from µ-com Check or Replace the...

  • Page 19: System/Key Circuit

    VCR ELECTRICAL TROUBLESHOOTING GUIDE 2. SYSTEM/KEY CIRCUIT (1) AUTO STOP Auto Stop Check the Drum Motor Does the H/SW waveform appear at IC501 Pin18? signal. Do the T-UP Reel Pulses Does 5.0V appear at the Check the Power Circuit. appear at IC501 Pin80? RS501? Replace the T/UP Reel Replace the IC501.

  • Page 20: Servo Circuit

    VCR ELECTRICAL TROUBLESHOOTING GUIDE 3. SERVO CIRCUIT (1) Unstable Video in PB MODE Does the Noise level of the screen change periodically? Readjust the height of the Do the CTL pulses appear Is adjusting the height of CTL Head. at IC501 Pin97? the CTL Head accurate? Does the CFG waveform appear at the IC501 pin87?
  • Page 21 VCR ELECTRICAL TROUBLESHOOTING GUIDE 2. SERVO CIRCUIT (3) When the Capstan Motor doesn’t run, When the Capstan Motor doesn’t run, Refer to “SMPS(CAPSTAN/12Volt) Does 12VA appear at PMC01? Trouble Shooting”. Does 2.8V appear at PMC01 Pin9? Check the PMC01 and the Capstan Does the PWM signal appear at IC501 Pin77? Motor Ass’y.
  • Page 22 VCR ELECTRICAL TROUBLESHOOTING GUIDE 2. SERVO CIRCUIT (4) Keys do not work Keys do not work Is 5V applied to IC501 Refer to “SMPS 5.3VA Pin99? Trouble Shooting”. Does FLD change when Replace the defective a function button is switches. pressed? 3-10...

  • Page 23: Y/C Circuit

    VCR ELECTRICAL TROUBLESHOOTING GUIDE 4. Y/C CIRCUIT (1) No Video in EE Mode, No Video in EE Mode Does the Video signal Check the Tuner Part appear at IC301 Pin15? Is REG 5.0V applied to Check the 5.0V, 5.3VA IC301Pins4, 22, 47, 50, 52, Line.
  • Page 24 VCR ELECTRICAL TROUBLESHOOTING GUIDE 3. Y/C CIRCUIT (2) When the Y(Luminance) signal doesn’t appear on the screen in PB Mode, Is 5.0V 5.3VA applied to IC301 Check the line of the 5.0V 5.3V Line. (Power Circuit) Pins22, 47, 50, 52, 60, 84, 92? Refer to ‘SYSTEM I Is I C BUS signal applied to...
  • Page 25 VCR ELECTRICAL TROUBLESHOOTING GUIDE 3. Y/C CIRCUIT (3) When the C(Color) signal doesn’t appear on the screen in PB Mode, Is 5.0V 5.3VA applied to the IC301 Check the line of the 5.0V 5.3VA Line. (Power Circuit) Pins22, 47, 50, 52, 60, 84, 92. Does the Color signal Does the X301 appear at IC301...
  • Page 26 VCR ELECTRICAL TROUBLESHOOTING GUIDE 3. Y/C CIRCUIT (4) When the Video signal doesn’t appear on the screen in REC Mode, Is the EE signal normal? Check EE Mode. Is 5.0V 5.3VA applied to Check the line of the 5.0V the IC301 Pins22, 47, 50, 5.3VA line.

  • Page 27: Hi-Fi Circuit

    VCR ELECTRICAL TROUBLESHOOTING GUIDE 5. Hi-Fi CIRCUIT (1) No Sound(EE Mode) No Sound. Check the AV1 Audio of IC801 Check the AV1 Jack. Pins9, 14. Check the AV2 Audio of IC801 Check the AV2 Jack. Pins10, 15 Check the DVD Audio of IC801 Check the DVD Audio out.
  • Page 28 VCR ELECTRICAL TROUBLESHOOTING GUIDE 3. Y/C CIRCUIT (2) Hi-Fi Playback PB mode No Sound. Check the Vcc of IC801 Check Power 5.0V, 12V. (Pins25, 40, 51, 58) Check the Hi-Fi Selection switch. Check IC501 Pin27 Is the head Switching signal (A.H/SW) IC801 Pin27 ok? (IC801 Pin41) and the Tape quality.
  • Page 29 VCR ELECTRICAL TROUBLESHOOTING GUIDE Hi-Fi REC. It can’t be recorded Hi-Fi Audio signal. Check Vcc of IC801. (Pins25, 40, 51, 58) Check Power 5V, 12V. Check ports of µ-COM. Check IC801 Pin42(Data), Pin43(CLOCK). (IC501 pins 71, 72) Do Audio signals appear at IC801 Check Audio input signal of IC801 Pins53, 57? Pins2, 4, 9, 10, 14, 15, 48.

  • Page 30: Tuner/If Circuit

    VCR ELECTRICAL TROUBLESHOOTING GUIDE 7. Tuner/IF CIRCUIT No Video on TV screen. Is Tuner mode selected? changer to Tuner mode using remocon. Is “TV” displayed on FLD displayed Set TV/VCR SW to VCR using remocon. Is +5V applied to TU701 Pin 3? Check 5V Line.
  • Page 31 VCR ELECTRICAL TROUBLESHOOTING GUIDE No TV sound. Check the Vcc of IC801(Pin58). Check Power (Vcc 12V) Check IC801 Pin 43(DATA), Check IC501 Pin 71(CLOCK), Pin 72(DATA) Pin 42(CLOCK) “HIGH”? Check TU701 Pin 13 Check IC801 Pin 48(TUNER SIF). (TUNER Audio Output) Replace IC801.

  • Page 32: Block Diagrams

    BLOCK DIAGRAMS 1. POWER(SMPS) BLOCK DIAGRAM RECTIFIER & T101 TH01 SMOOTING BLOCK BD101 TO VCR (D128,C133,R130) RECTIFIER & (P101) SMOOTING BLOCK 5.3VA (D127,C131,L125,C132) RECTIFIER & SNUBBER 5.0V SMOOTING BLOCK BLOCK HSR S/W Block C103 (D126,C136,L122,C130) Cap Vcc (D101,C105 (Q120,ZD153,C135, C106,R103) RECTIFIER &...

  • Page 33: Avcp Block Diagram

    2. AVCP BLOCK DIAGRAM 1) PB Mode 2) REC Mode 3-22 3-23...

  • Page 34: System Block Diagram

    3. SYSTEM BLOCK DIAGRAM TO/FROM DECK TO/FROM DECK TO/FROM AVCP TO/FROM AVCP 5.3VA MODE S/W MS501 95 94 87 12 9 18 13 16 CV IN I-Limit COMP IN MODE S1 MODE S1 MODE S2 REC 'H' MODE S2 MODE S3 MODE S4 C.ROT MODE S3...

  • Page 35: Jack Block Diagram

    4. JACK BLOCK DIAGRAM VIDEO SW IC To Hi-Fi To.AVCP IC601 To.AVCP JK601 A/V JACK From AVCP AV1 Video in AV1 Audio in PMD02 To TUNER (L/R) 1) Front Video IC601 MOD VIDEO VIDEO AMP IC 3) Mixed Video 5) VDR CVBS Video Out 7) VCR Video 9) Y (Super)

  • Page 36: Stuner/Mtz Block Diagram

    5. STUNER/MTZ BLOCK DIAGRAM 716 MOD A.IN MOD CTL 106 5V VCR 'H' 671 MOD VEDIO TU.V.OUT IIC CLK IIC DATA 781 SIF OUT LGXBR446 (LGEUS) 3-28 3-29...

  • Page 37: Avcp Block Diagram

    6. AVCP BLOCK DIAGRAM 1) EE Mode 2) PB Mode 3) REC Mode 3-30 3-31...

  • Page 38: Circuit Diagrams

    CIRCUIT DIAGRAMS IMPORTANT SAFETY NOTICE CIRCUIT. SPECIAL COMPONENTS ARE SHADED ON NOTE : THE SCHEMATIC FOR EASY IDENTIFICATION. 1. Shaded( ) parts are critical for safety. Replace only WHEN SERVICING THIS CHASSIS, UNDER NO CIR- THIS CIRCUIT DIAGRAM MAY OCCASIONALLY DIF- with specified part number.
  • Page 39 2. TUNER CIRCUIT DIAGRAM 3-34 3-35...

  • Page 40: A/V Circuit Diagram

    3. A/V CIRCUIT DIAGRAM WAVEFORM 3-36 3-37...

  • Page 41: Hi-Fi Circuit Diagram

    4. Hi-Fi CIRCUIT DIAGRAM 3-38 3-39...

  • Page 42: System Circuit Diagram

    5. SYSTEM CIRCUIT DIAGRAM WAVEFORM 3-40 3-41...

  • Page 43: Jack Circuit Diagram

    6. JACK CIRCUIT DIAGRAM 3-42 3-43...

  • Page 44: Timer Circuit Diagram( 2 Tool )

    7. TIMER CIRCUIT DIAGRAM( 2 TOOL ) 3-44 3-45...

  • Page 45: Timer Circuit Diagram( 3 Tool, 8 Tool )

    8. TIMER CIRCUIT DIAGRAM( 3 TOOL, 8 TOOL ) 3-46 3-47...

  • Page 46: Timer Circuit Diagram( 4 Tool )

    9. TIMER CIRCUIT DIAGRAM( 4 TOOL ) 3-48 3-49...

  • Page 47: Timer Circuit Diagram( 6 Tool )

    10. TIMER CIRCUIT DIAGRAM( 6 TOOL ) 3-50 3-51...

  • Page 48: Timer Circuit Diagram( 7 Tool )

    11. TIMER CIRCUIT DIAGRAM( 7 TOOL ) 3-52 3-53...

  • Page 49: Waveforms

    WAVEFORMS ✦ IC301 Oscilloscope Waveform ✦ IC501 Waveform Photographs IC301 Pins 8, 9 IC301 Pins 15, 17, IC301 Pin 31 IC301 Pin 98 V.HSW DV.SYNC CTL(+) CTL(-) PB mode 19, 21 PB/REC mode REC mode (IC501 Pin 18) (IC501 PIN 13) (IC501 Pin 95) (IC501 Pin 94) 1V/10mS...

  • Page 50: Circuit Voltage Chart

    • CIRCUIT VOLTAGE CHART MODE MODE MODE MODE MODE MODE MODE MODE PLAY PLAY PLAY PLAY PLAY PLAY PLAY PLAY PIN NO. PIN NO. PIN NO. PIN NO. PIN NO. PIN NO. PIN NO. PIN NO. I C 3 0 1 2.07 2.09 4.98...

  • Page 51: Printed Circuit Diagrams

    PRINTED CIRCUIT DIAGRAMS 1. VCR P.C.BOARD 3-58 3-59...

  • Page 52: Smps P.c.board

    2. SMPS P.C.BOARD LOCATION GUIDE 3-60 3-61...

  • Page 53: Jack P.c.board

    3. JACK P.C.BOARD ( 2 TOOL, 3 TOOL ) ( 6 TOOL ) LOCATION GUIDE LOCATION GUIDE ( 4 TOOL, 8 TOOL ) LOCATION GUIDE 3-62 3-63...

  • Page 54: Key P.c.board

    5. KEY P.C.BOARD 6. Timer P.C.BOARD ( 2 TOOL ) ( 2 TOOL ) ( 3 TOOL ) ( 3 TOOL ) ( 4 TOOL ) ( 4 TOOL ) ( 6 TOOL ) ( 6 TOOL ) ( 7 TOOL ) ( 7 TOOL ) ( 8 TOOL ) ( 8 TOOL )

  • Page 56: Vdr Part

    VDR PART VDR ELECTRICAL TROUBLESHOOTING GUIDE 1. Power(SMPS) CIRCUIT No 3.8VA No 3.3V Is the F101 Replace the F101 Is there about 3.8V Check or Replace Normal? (Use the same Fuse) at the IC154 pin1? the D122 Is the BD101 Is there about 3.3V~ 5V Check the ‘DVD PWR CTL Replace the BD101...
  • Page 57 VDR ELECTRICAL TROUBLESHOOTING GUIDE No 2.5V No 5.0V Is there about 3.8V Check or Replace Is there about 5.5V Check or Replace at the IC152 pin1? the D122 at the IC151 pin1? the D124 Is there about 3.3V~ Check the ‘DVD PWR CTL Is there about 3.3V~ 5V Check the ‘DVD PWR CTL 5V at the IC152 pin4?

  • Page 58: No Component Video Signal When Playing Disc

    VDR ELECTRICAL TROUBLESHOOTING GUIDE 2. No Component video signal when playing DISC Component : No Y Signal Component : No Pb Signal Component : No Pr Signal R905, C923 R904, C922 R903, C921 IC601 – 10 IC601 – 12 IC601 – 14 Check input Check input Check input...

  • Page 59: No Composite / S-Video Signal When Playing Disc

    VDR ELECTRICAL TROUBLESHOOTING GUIDE 3. No COMPOSITE / S-VIDEO signal when playing DISC COMPOSIT : No Signal S-VIDEO : No Y Signal S-VIDEO : No C Signal R911, C927 R902, C920 R901, C919 IC601 – 4 IC601 – 6 IC601 – 2 Check input Check input Check input...

  • Page 60: No Tv, External Input Video Signal

    VDR ELECTRICAL TROUBLESHOOTING GUIDE 4. No TV, External Input video signal No : S-JACK No : TV signal No : AV1 signal No : AV2 signal signal TU701 1-19 IC501 – 1, 3, 8 Check signal IC802 - 1 IC802 - 3 IC301 - 17 check in the And circuit...

  • Page 61: When Playing Disc, No Audio Output

    VDR ELECTRICAL TROUBLESHOOTING GUIDE 5. When playing DISC, no audio output 7. No OPTICAL / DIGITAL output Check IC802 power PN303-1 signal IC802 – 15, 18 Check VCR PART and other circuits normal Check audio signals Check FFC Cable IC802-10 Check Check AV_RST1 and Signal flow High?

  • Page 62: No External Input 1, 2 Audio

    VDR ELECTRICAL TROUBLESHOOTING GUIDE 8. No External Input 1, 2 audio 9. No External Input 3 audio Audio output even <when playing DISC, Audio output even <when playing DISC, When playing DISC no audio output> check When playing DISC no audio output> check PN304-19~22 Check Check FFC Cable PN5401 –...

  • Page 63: Block Diagrams

    BLOCK DIAGRAMS 1. VDR SET TOTAL BLOCK DIAGRAM D_control R_Pr_OUT B_Pb_OUT G_Y_OUT C_OUT Y_OUT CVBS_OUT YC_MIXER V2_IN V_VCR_IN IEC958 A_OUT A2_IN A_IN Serial Comm. Int_Prog VDR_reset_L 3-73...

  • Page 64: Vdr Main H/ W Block Diagram

    2. VDR MAIN H/ W BLOCK DIAGRAM A2_IN V2_IN 3-74 3-74...

  • Page 65: Power Block Diagram

    3. POWER BLOCK DIAGRAM 3-75...

  • Page 66: Audio In/ Out Block Diagram

    4. AUDIO IN/ OUT BLOCK DIAGRAM 3-76...

  • Page 67: Cpu & Control Register Block Diagram

    5. CPU & CONTROL REGISTER BLOCK DIAGRAM 3-77 3-77...

  • Page 68: Video In/ Out Block Diagram

    6. VIDEO IN/ OUT BLOCK DIAGRAM 3-78 3-78...

  • Page 69: Dv 1394 In/Out Block Diagram

    7. DV 1394 IN/OUT BLOCK DIAGRAM 3-79...

  • Page 70: Memory Card In/ Out Block Diagram

    8. MEMORY CARD IN/ OUT BLOCK DIAGRAM 3-80...

  • Page 72: Circuit Diagrams

    CIRCUIT DIAGRAMS 1. BGA 308P CIRCUIT DIAGRAM 3-81 3-82...

  • Page 73: Ddr & B To B Connector Circuit Diagram

    2. DDR & B TO B CONNECTOR CIRCUIT DIAGRAM 3-83 3-84...

  • Page 74: Power, Flash, Connector Circuit Diagram

    3. POWER, FLASH, CONNECTOR CIRCUIT DIAGRAM 3-85 3-86...

  • Page 75: Rst, Control/Status_Reg., Atapi

    4. RST, CONTROL/STATUS_REG., ATAPI, HOST_CPLD, LATCH CIRCUIT DIAGRAM 3-87 3-88...

  • Page 76: Video_In, Video_Out Circuit Diagram

    5. VIDEO_IN, VIDEO_OUT CIRCUIT DIAGRAM 3-89 3-90...

  • Page 77: Dv1394, Hdmi Circuit Diagram

    6. DV1394, HDMI CIRCUIT DIAGRAM 3-91 3-92...

  • Page 78: Audio In/Out Circuit Diagram

    7. AUDIO IN/OUT CIRCUIT DIAGRAM 3-93 3-94...

  • Page 79: Waveforms

    • WAVEFORMS X101 IC5101 IC502 PN303 IC802 IC802 13.5MHz PIN42 PIN29 PIN1 PIN4 PIN2 IEC958 ADAC_MCLK ADAC_SCLK IC502 IC502 PN304 IC802 IC804 IC802 PIN40 PIN74 PIN5 PIN3 PIN4 PIN1 CVBS_OUT VI_CLK 14.318MHz ADAC_LRCK ADC_SDATA(AI_D0) DAC_SDATA(AO_D0) PN304 PN304 PN304 IC502 PN7401 PN7401 PIN9 PIN11...

  • Page 80: Circuit Voltage Chart

    • CIRCUIT VOLTAGE CHART MODE MODE MODE MODE MODE MODE MODE PIN NO. PIN NO. PIN NO. PIN NO. PIN NO. PIN NO. PIN NO. I C 1 2 0 1 0.19 0.19 0.19 0.04 0.04 3.24 3.254 3.253 0.004 0.006 3.24 3.18...

  • Page 81: Printed Circuit Diagrams

    PRINTED CIRCUIT DIAGRAMS 1. VDR P.C.BOARD(TOP VIEW) 3-99 3-100...

  • Page 82: Vdr P.c.board(Bottom View)

    2. VDR P.C.BOARD (BOTTOM VIEW) 3-101 3-102...
  • Page 84 SECTION 4 MECHANISM OF VCR PART(D-37) CONTENTS DECK DECK MECHANISM ADJUSTMENT MECHANISM PARTS LOCATIONS • Fixtures and tools for service ....4-12 1. Mechanism Assembly Mode Check ..4-13 • Top View............4-1 2. Previous Preparation for • Bottom View ..........4-1 Deck Adjustment ........4-14 3.

  • Page 85: Top View

    DECK MECHANISM PARTS LOCATIONS • Top View Procedure Ref. Posi Part Fixing Type Draw- tion Starting ings 1 Drum Assembly 3 screws 2 Plate Top 2 hooks 3 Holder Assembly CST 6 chasses 4 Gear Assembly Rack F/L 1 hook 2,3,4 5 Opener Door Chassis Hole...
  • Page 86 DISASSEMBLY AND ASSEMBLY OF DECK MECHANISM Drum Assembly Flat Cable (S1) (S1) (S1) Cap, FPC Holder FPC Fig. A-1 Cautions in assembly of FPC 1. Disassembly of Drum Assembly (Figure A-1) 1) Separate the flat cable from the Drum FPC and the Capstan Motor.
  • Page 87 DISASSEMBLY AND ASSEMBLY OF DECK MECHANISM Plate Top (Fig. A-2-1) (B') Holder Assembly CST (Fig. A-2-2) Arm Assembly F/L (Fig. A-2-5) Lever Assembly S/W (Fig. A-2-6) (H4) Opener Door (Fig. A-2-4) (H3) Gear Assembly Rack F/L (Fig. A-2-3) Fig. A-2...

  • Page 88: Disassembly Of Gear Assembly

    DISASSEMBLY AND ASSEMBLY OF DECK MECHANISM 2. Disassembly of Plate Top (Fig. A-2-1) 4. Disassembly of Gear Assembly Rack F/L (Fig. A-2-3) 1) Separate the right part while leaning back the (B) part of 1) Separate the hook (H3) while leaning ahead the hook (3) the plate top toward the arrow direction.
  • Page 89 DISASSEMBLY AND ASSEMBLY OF DECK MECHANISM Arm Assembly Cleaner (Fig. A-3-3) (H5) Gear Wheel (Fig. A-3-2) Base Assembly A/C Head Motor Assembly L/D (S5) (Fig. A-3-5) (Fig. A-3-1) Head F/E (C1) (Fig. A-3-4) (S4) Fig. A-3 8. Motor Assembly L/D (Fig. A-3-1) 10.
  • Page 90 DISASSEMBLY AND ASSEMBLY OF DECK MECHANISM Arm Assembly Tension (Fig. A-4-2) (H7) Reel T (Fig. A-4-3) Reel S (Fig. A-4-3) Spring Tension Brake Assembly T Spring Tension (Fig. A-4-1) (H8) (H6) Fig. A-4 13. Brake Assembly T (Fig. A-4-1) 15. Reel S/Reel T (Fig. A-4-3) 1) Release the spring tension from the lever spring hook 1) Disassemble the reel S/ reel T while holding it up (com- (H6).
  • Page 91 DISASSEMBLY AND ASSEMBLY OF DECK MECHANISM Opener Lid (Fig. A-5-2) Arm Assembly Pinch (Fig. A-5-3) Base Assembly P4 (Fig. A-5-1) (H9) Arm T/up (Fig. A-5-4) Chassis Fig. A-5 16. Base Assembly P4 (Fig. A-5-1) 18. Arm Assembly Pinch (Fig. A-5-3) 1) Release the (A) part of the base assembly P4 from the 1) Hold the arm assembly pinch up.
  • Page 92 DISASSEMBLY AND ASSEMBLY OF DECK MECHANISM Suppoter Capstan (Fig. A-6-1) Belt Capstan (Fig. A-6-2) Motor Capstan (Fig. A-6-3) Washer(W1) Clutch Assembly D37 (Fig. A-6-5) (L1) (L1) Lever F/R (Fig. A-6-4) Chassis (S6) Fig. A-6 20. Supporter, Capstan (Fig. A-6-1) 22. Lever F/R (Fig. A-6-4) 1) Turn the supporter and Capstan by 90 deg.
  • Page 93 DISASSEMBLY AND ASSEMBLY OF DECK MECHANISM (H10) (H11) Gear Sector Gear Cam (Fig. A-7-3) (Fig. A-7-2) (W2) Washer (W2) Brake Assembly Capstan Gear Cam Hole(B) Plate Slider (Fig. A-7-4) Gear Drive (L2) (Fig. A-7-5) (Fig. A-7-1) Gear Drive Hole(A) Lever Tension (Fig.
  • Page 94 DECK MECHANISM DISASSEMBLY Gear assembly P2 Hole Gear assembly P3 Hole Gear Assembly P3 (Fig. A-8-2) Gear Assembly P2 (Fig. A-8-1) (H13) (H12) Lever Tension Boss Plate slider Hole(B) (H14) Base Loading (Fig. A-8-5) Chassis Base Assembly P3 (Fig. A-8-4) Base Assembly P2 (Fig.
  • Page 95 DISASSEMBLY AND ASSEMBLY OF DECK MECHANISM Base Tension (Fig. A-9-1) Arm Assembly Idler Jog (Fig. A-9-2) Chassis Fig. A-9 34. Base Tension (Fig. A-9-1) 35. Arm assembly Idler Jog (Fig. A-9-2) 1) Release the (A) part of the base tension from the 1) Push both (B), (C) parts in Fig.

  • Page 96: Fixtures And Tools For Service

    DECK MECHANISM ADJUSTMENT • Fixtures and Tools for Service 1. Cassette Torque Meter 2. Alignment tape 3. Torque gauge SRK-VHT-303(Not SVC part) Part No NTSC:DTN-0001 600g.Cm ATG Part No:D00-D006 PAL:DTN-0002 Part No:D00-D002 4. Torque gauge adaptor 5. Post height adjusting driver 6.

  • Page 97: Mechanism Assembly Mode Check

    DECK MECHANISM ADJUSTMENT 1. Mechanism Assembly Mode Check Purpose of adjustment : To make tools normally operate by positioning tools accurately. Fixtures and tools used VCR (VCP) status Checking Position • Eject Mode • Blank Tape (empty tape) • Mechanism and Mode Switch (with cassette withdrawn) 1) Turn the VCR on and take the tape out by pressing the 4) Undo the screw fixing the deck and the main frame, and...
  • Page 98 DECK MECHANISM ADJUSTMENT 2. Previous Preparation for Deck Adjustment (Preparation to load the VCR (VCP) with cassette tape not inserted) 1) Take the power cord from the consent. If doing so, proceeding to the stop mode is done. In this 2) Separate the top cover and the plate assembly top.

  • Page 99: Guide Roller Height Adjustment

    DECK MECHANISM ADJUSTMENT 4. Guide Roller Height Adjustment Purpose of adjustment : To ensure that the bottom surface of the tape can travel along with the tape lead line of the lower drum by constantly and adjusting and maintaining the height of the tape. 4-1.
  • Page 100 DECK MECHANISM ADJUSTMENT 5. Audio/Control (A/C) Head Adjustment Purpose of adjustment : To ensure that audio and control signals can be recorded and played according to the contract tract by constantly maintaining distance between tape and head, and tape tension between the P3 post and the P4 post.
  • Page 101 DECK MECHANISM ADJUSTMENT 5-2. Tape Path Check between Pinch Roller and travel it stably to ensure there is no crumbling or fold- ing of the tape. Take up Guide (Check in the Rev Mode) 1) Check the tape pass status between the pinch roller and 2) Check there is folding of the tape at the bottom or top the take-up guide.(Check there is crumpling of the tape of the take-up guide in cutting-off the REV mode...
  • Page 102 DECK MECHANISM ADJUSTMENT 7. Adjustment after Drum Assembly (Video Heads) Purpose of adjustment : To adjust and stabilize the height change, X-distance change, etc depending on the guide roller after assembling the drum. Fixtures and tools used Connection position VCR (VCP) status Adjustment position •...
  • Page 103 PROTECTION, MAINTENANCE AND CHECK OF VIDEO FUNCTION 1. Checking Points prior to Repair Following abnormal phenomena may be repaired by removal of foreign materials and oil supply. Check oiling is required at the checking set or cleaning status is complete. Determine that necessity of checking and repair the set exists after checking the using period of the set together with the user.

  • Page 104: Essential Check And Repair

    PROTECTION, MAINTENANCE AND CHECK OF VIDEO FUNCTION 2. Essential Check and Repair 4. Tools for Check and Repair Recording density of the video is far higher than the audio. (1) Grease: Floil G-3114 (KANTO) or equivalent grease Therefore video parts are very precise so as to allow only (Green) error of 1/1000mm or so in order to maintain compatibility (2) Grease: Kanto G-754, PL-433 (Yellow)
  • Page 105 PROTECTION, MAINTENANCE AND CHECK OF VIDEO FUNCTION 5-2) Grease Applications (2) Regular Grease Application Apply grease to the designated application position (1) Grease Application Method every 500 hour. Apply grease by using a cloth swab or brush. Care must be exercised so that excess quantity should not be used.
  • Page 106 PROTECTION, MAINTENANCE AND CHECK OF VIDEO FUNCTION Lever, F/R, Base, Tension GEAR AY, P2 & P3 PL-433 LEVER, F/R BASE, TENSION Clutch Contact Part (PL-433, Yellow) Tension Arm Party Hinge Part (PL-433, Yellow) 4-22...

  • Page 107: Deck Mechanism

    MECHANISM TROUBLESHOOTING GUIDE 1.Deck Mechanism Auto REW doesn't work. Is the supply to the END sensor END sensor "H"? “H”: more than 3.5V “L”: less than 0.7V~1V Is the Vcc. voltage of End sen- Check the syscon power. sor 5V? Replace End sensor.
  • Page 108 MECHANISM TROUBLESHOOTING GUIDE AUTO STOP. (PLAY/CUE/REV) Check aligment positions (page 4-14) Check Pinch spring. In Play/Cue/Rev is the pinch roller in contact with the cap- Is the output of DFG, DPG OK? Replace Drum Motor. stan shaft. Are there T/up and supply reel Check Servo, Syscon.
  • Page 109 MECHANISM TROUBLESHOOTING GUIDE In PB mode Tape Presence not sensed. Is the Pinch Roller attached to Check Alignment positions the Capstan Motor Shaft? (page 4-14) Does the T/Up Reel turn? Is the Belt ok? Replace the Belt. Check the clutch and the Idler Does the Capstan Motor turn? Assembly.

  • Page 110: Front Loading Mechanism

    MECHANISM TROUBLESHOOTING GUIDE 2. Front Loading Mechanism Cassette cannot be inserted. Does the Lever Assembly Is the Lever Assembly Switch Replace or add the Lever Switch work? Spring damaged or omitted? Assembly Switch Spring. Does the CST IN Switch work Replace CST IN Switch.
  • Page 111 MECHANISM TROUBLESHOOTING GUIDE Cassette will not load. Does the CST insert? Does the CST insert? Replace the Lid Opener. Does the F/L Gear Rack work? Replace the F/L Rear Rack. Does the Door Opener work? Does the F/L Arm Assembly work? Is the Door opener assembled correctly? Does the L/D Motor work? Replace the F/L Arm Assembly.
  • Page 112 EXPLODED VIEWS 1. Front Loading Mechanism Section 4-28...
  • Page 113 EXPLODED VIEWS 2. Moving Mechanism Section (1) OPTIONAL PART 4-29...
  • Page 114 EXPLODED VIEWS 3. Moving Mechanism Section (2) 4-30...
  • Page 116 SECTION 5 RL-05 LOADER PART CONTENTS ELECTRICAL TROUBLESHOOTING GUIDE ......................5-2 WAVEFORMS .................................5-16 1. POWER & RESET SIGNAL ............................5-16 2. MAIN CLOCK1 FOR IC202 (16.9MHZ)........................5-16 3. SDRAM CLOCK .................................5-17 4. TRAY OPEN/CLOSE SIGNAL 1..........................5-17 5. TRAY OPEN/CLOSE SIGNAL 2..........................5-18 6. SLED MOVE SIGNAL 1 .............................5-18 7.

  • Page 117: Electrical Troubleshooting Guide

    ELECTRICAL TROUBLESHOOTING GUIDE Reset or Power Check. Check it after connecting the power cable only for NO Reset or Power ON. •Check the power(5V,12V)short. Are the pin 4, 1 of LCN202 •Check the power cable. +12V, +5V respectively after the power •Repair the power part.
  • Page 118 System Check Load tray without inserting disc. Does tray operate normally? Go to “Tray operating is abnormal” Does pick-up move to inside? Go to “Sled operating is abnormal” Go to “Focus Actuator operating is Does pick-up lens move abnormal” up/down? Go to “Laser operating is abnormal”...
  • Page 119 Tray operating is abnormal Tray open doesn ’t work. Is the Input voltage 0V at LIC301 •Check the connection of LIC301 pin 106. pin 60 when push the •Replace the EJECT SW. EJECT SW? Is there tray •Replace the LIC502. control signal input? •Check the communication line between (LIC502 pin46)
  • Page 120 Sled operating is abnormal Is there sled control signal output? Replace the LIC301 (LIC301 pin 126, 127) Is there •Replace the IC102. sled drive signal input? •Check the LR532, LR533. (LIC502 pin 29, 30) Is there Is DRV-CTRL1 sled drive voltage output? signal “H”? (LIC502 pin 37~40) (LIC502 pin35)
  • Page 121 Spindle operating is abnormal Is there Is there spindle control DSP spindle control signal input? output(LIC301 pin 123)? (LIC502 pin 26) •Replace the LIC301 Replace the LIC301. Is there Is there spindle drive voltage output? SFG signal input? (LIC502 pin 11,13,16) (LIC301 pin 53) Replace the Spindle Motor •Replace the LIC102.
  • Page 122 Focus Servo is unstable Is FE signal output normal in Focusing Replace the LIC201. Up/Down? (LIC201 pin 87) Is FDRV signal output normal in Focusing •Check the R534. Up/Down? •Replace the LIC201. (LIC301 pin 124) Go to “Focus Actuator operating is abnormal” Focus Actuator operating is abnormal.
  • Page 123 Track Servo is unstable Is TE signal Is pick-up output normal in focusing (E, F, G, H)output normal? ON and tracking OFF? (LCN201 pin 5, 8, 9, 12) (LIC201 pin 85) Replace the LIC201. •Check the pick-up FFC. •Replace the pick-up. •After replacing Perform 5.
  • Page 124 Recognition Fail Case 1: CD-ROM Fail Check pick-up read power Go to “LD CHECK”. is 0.9~1.3mW? Does focus servo Go to “Focus Servo is unstable”. operate normally? Check pick-up •Check the pick-up FFC and LCN201. RF signal LIC201(Pin113) is •Replace the pick-up unit. 500~1000mVpp? Check RFEQO waveform Replace the LIC201...
  • Page 125 Recognition Fail Case 2:DVD Fail Check pick-up read power Go to “LD CHECK”. was 0.9~1.1mW? Is LIC201 pin 51(CD/DVD) level Replace the LIC201. was about 0V? Is there RF signal at LCN201pin 13,14. Replace the pick-up. Is there RF signal Replace the LIC201 at LIC201 pin 95.
  • Page 126 LD CHECK (Laser operating is abnormal) Perform 6. Optical Power Setting parameter check from‘How to use Test tool’. Execute “C.Laser Power Setup”of Is ALPC parameters “How to use Test Tool” valid? Perform 4. LD Test check from ‘How to use Test tool’. Check reference voltage.
  • Page 127 CD/DVD ? Select Mode: CD, Test and perform Select Mode: DVD, Test and perform Test from 4. LD Test of ‘How to use Test from 4. LD Test of ‘How to use Test tool’ Test tool’ Check the input of CD/DVD. Check the input of CD/DVD.
  • Page 128 Select Mode: DVD, Test and perform Select Mode: DVD, Test and perform Test from 4. LD Test of ‘How to use Test from 4. LD Test of ‘How to use Test tool’ Test tool’ Check the input of CD/DVD. Check the input of CD/DVD. (pin 17 of LCN201 : ‘L’) (pin 17 of LCN201 : ‘L’) Check the input of VWDC.
  • Page 129 In case of writing fail. Normal Case Check the media Check disc label. DVD ±R/RW? Does the disc Remove the dust,fingerprint and have any dust,scratch, if the disc has long width scratch, fingerprint …? change it. Finalized Disc? Eject disc. If DVD ±R disc,use new DVD ±...
  • Page 130 Writing Part Check Load tray with DVD ±R/RW disc. Press the “REC” key. Does writing finish without any error? Is the written file Eject tray. read normally? Go to “LD CHECK”. Is the re-written file read normally? Is SHAPCRE input signal pulse? (LIC01 pin 62) Check and replace the connection of Check and replace LIC201, LIC301.

  • Page 131: Waveforms

    WAVEFORMS 1. POWER & RESET Signal 12 V(LCN302 PIN4) 5V(LCN302 PIN 1) /HRST(LIC303 PIN 3) /SYSRST(LIC303 PIN2) POWER IN 2. Main Clock1 for IC202 (16.9MHz) LX301(LIC301 PIN 2) GND LEVEL 5-16...

  • Page 132: Sdram Clock

    3. SDRAM Clock MCLK(LIC304 PIN 35) 4. TRAY OPEN/CLOSE SIGNAL 1 /EJECT-KEY (LR504) TRAY-CTRL (LIC502 PIN46) TRAY+(LCN504 PIN 3) TRAY-(LCN504 PIN 4) CLOSE OPEN 5-17...

  • Page 133: Tray Open/Close Signal 2

    5. TRAY OPEN/CLOSE SIGNAL 2 /EJECT-KEY(LR504) TRAY-CTRL(LIC502 PIN46) /OPEN-SW(LCN504 PIN 1) /LOAD-SW (LCN504 PIN 2) CLOSE OPEN 6. SLED MOVE SIGNAL 1 SDRV2(LIC502 PIN31) SDRV1(LIC107 PIN29) A+(LCN501PIN 2) A-(LCN1501 PIN 1) ZOOM 5-18...

  • Page 134: Sled Move Signal 2

    7. SLED MOVE SIGNAL 2 SDRV2(LIC502 PIN31) SDRV1(LIC107 PIN29) A+(LCN501PIN 2) A-(LCN1501 PIN 1) 8. FOCUS SEARCH SIGNAL FDRV (LIC502 PIN 5) F+ (LIC502 PIN 52) F- (LIC502 PIN 51) 5-19...

  • Page 135: Laser Turn On Signal

    9. LASER TURN ON SIGNAL F+ (LIC502 PIN 52) LDEN-DVD(LCN201 PIN17) VRDC(LCN201PIN 34) 5-20...

  • Page 136: Disc Type Judgement Waveform (Cd Series)

    10. DISC TYPE JUDGEMENT WAVEFORM (CD SERIES) FDRV(LIC502 PIN 5) FE(LIC201 PIN87) TE(LIC201 PIN85) RF(LIC201PIN 113) 11. DISC TYPE JUDGEMENT WAVEFORM (CD&CD-R) FDRV(LIC502 PIN 5) FE(LIC201 PIN87) TE(LIC201 PIN85) RF(LIC201PIN 113) 5-21...

  • Page 137: Disc Type Judgement Waveform (Cd-Rw)

    12. DISC TYPE JUDGEMENT WAVEFORM (CD-RW) FDRV(LIC502 PIN 5) FE(LIC201 PIN87) TE(LIC201 PIN85) RF(LIC201PIN 113) 13. DISC TYPE JUDGEMENT WAVEFORM (DVD SERIES) FDRV(LIC502 PIN 5) FE(LIC201 PIN87) TE(LIC201 PIN85) RF(LIC201PIN 113) 5-22...

  • Page 138: Disc Type Judgement Waveform (Dvd_Single&R)

    14. DISC TYPE JUDGEMENT WAVEFORM (DVD_SINGLE&R) FDRV(LIC502 PIN 5) FE(LIC201 PIN87) TE(LIC201 PIN85) RF(LIC201PIN 113) 15. DISC TYPE JUDGEMENT WAVEFORM (DVD _DUAL) FDRV(LIC502 PIN 5) FE(LIC201 PIN87) TE(LIC201 PIN85) RF(LIC201PIN 113) 5-23...

  • Page 139: Disc Type Judgement Waveform (Dvdrw)

    16. DISC TYPE JUDGEMENT WAVEFORM (DVDRW) FDRV(LIC502 PIN 5) FE(LIC201 PIN87) TE(LIC201 PIN85) RF(LIC201PIN 113) 17. SPINDLE WAVEFORM1 MDRV (LIC502 PIN 26) REFOUT (LIC502 PIN 42) SFG((LIC502 PIN43) 5-24...

  • Page 140: Spindle Waveform2

    18. SPINDLE WAVEFORM2 U((LIC502 PIN11) V((LIC502 PIN13) W((LIC502 PIN16) SFG(LIC502 PIN43) 19. FOCUS ON SIGNAL(CD) FDRV (LIC301 PIN 124) FE (LIC201 PIN87) TDRV (LIC301 PIN 125) TE (LIC201 PIN85) 5-25...

  • Page 141: Focus On Signal(Dvd)

    20. FOCUS ON SIGNAL(CD) FDRV (LIC301 PIN 124) FE (LIC201 PIN87) TDRV (LIC301 PIN 125) TE (LIC201 PIN85) 21. FOCUS ON SIGNAL(DVD) FDRV (LIC301 PIN 124) FE (LIC201 PIN87) TDRV (LIC301 PIN 125) TE (LIC201 PIN85) 5-26...

  • Page 142: Track Off Signal(Cd)

    22. FOCUS ON SIGNAL (DVD) FDRV (LIC301 PIN 124) FE (LIC201 PIN87) TDRV (LIC301 PIN 125) TE (LIC201 PIN85) 23. TRACK OFF SIGNAL(CD) TE (LIC106 PIN85) TZC(LIC106 PIN74) MIRRBCA(LIC106 PIN77) 5-27...

  • Page 143: Track Off Signal(Dvd)

    24. TRACK OFF SIGNAL(DVD) TE (LIC106 PIN85) TZC(LIC106 PIN74) MIRRBCA(LIC106 PIN77) 25. Tilt Driver signal(Disc reading) TILTDRV(LIC502 PIN47) TILT+(LIC502 PIN50) TILT-(LIC502 PIN49) 5-28...

  • Page 144: Rf Waveform(Dvd)

    26. RF WAVEFORM(DVD) RFP(LIC201 PIN2) RFO(LIC201PIN 113) RFI(LIC201 PIN 95) 27. RF WAVEFORM(CD) RFP(LIC201 PIN2) RFO(LIC201PIN 113) RFI(LIC201 PIN 95) 5-29...

  • Page 145: Wobble(Dvd-R/Rw)_Reading

    28. WOBBLE(DVD-R/RW)_READING AWOBBLE(LIC201 PIN81) LPP/HEAD(LIC201 PIN 73) 29. WOBBLE(DVD+R/RW)_READING& WRITING => X1 SPEED AWOBBLE(LIC201 PIN81) LPP/HEAD(LIC201PIN 73) 5-30...

  • Page 146: Ld Enable(Dvd)

    30. LD Enable(DVD) CD/DVD(LCN201 PIN 17) LDEN(LCN PIN 38) 31. LD Enable(CD) CD/DVD(LCN201 PIN 17) LDEN(LCN102 PIN 38) 5-31...
  • Page 147 32. Laser Power(reading) _ DVD+RW VRDC(LCN201 PIN 34) VWDC(LCN201 PIN 36) VWDC2(LCN201 PIN 35) OPCTRG(LIC301 PIN 151) 33. Laser Power(Erase) _ DVD+RW VRDC(LCN201 PIN 34) VWDC(LCN201 PIN 36) VWDC2(LCN201 PIN 35) OPCTRG(LIC301 PIN 151) 5-32...

  • Page 148: Laser Power(Writing)_Initial State

    34. Laser Power(Writing) _ initial state VRDC(LCN201 PIN 34) VWDC(LCN201 PIN 36) VWDC2(LCN102 PIN 35) OPCTRG(LIC301 PIN 151) 35.Laser Power(Writing)_Processing VRDC(LCN201 PIN 34) VWDC(LCN201 PIN 36) VWDC2(LCN201 PIN 35) 5-33...

  • Page 149: The Difference Of Dvd-R/Rw, Dvd+R/Rw Discs And Dvd-Rom

    The difference of DVD-R/RW, DVD+R/RW discs and DVD-ROM 1. Recording Layer • DVD-ROM (Read Only Disc) 0.4 um • DVD+R/RW Disc 5-34...

  • Page 150: Disc Specification

    2. Disc Specification 3. Disc Materials 1) DVD-ROM < Single Layer > < Dual Layer > 5-35...
  • Page 151 2) Recording format using organic dye material ( DVD-R / DVD+R ) The format that records data through the creation of recorded marks by changing the organic dye material with a laser beam. Disc structure Recording principles [ Recording ] Recording is done by changing the organic dye layer and the substrate with a laser When a strong laser is applied to a disc, the temperature of the organic dye material goes up, the dye is decomposed and the substrate changes at the same time.
  • Page 152 3) Recording format using phase-change recording material ( DVD-RW / DVD+RW ) • Data is recorded by changing the recording layer from the amorphous status to the crystalline status, and played back by reading the difference of the reflection coefficient. Amorphous: Non-crystalline.
  • Page 153 To make recordings, it is necessary to modulate the write pulse, which is called “Write Strategy”. There can be many types in Write Strategy. Typically Write Strategy for DVD ±R has NMP(Non Multi-Pulse) type and MP(Multi-Pulse) type. In NMP type each single mark is created by subsequent separated short pulses. In MP type each single mark is created by one continuous pulse.

  • Page 154: Organization Of The Inner Drive Area, Outer Drive Area, Lead-In Zone And Lead-Out Zone

    4. Organization of the Inner Drive Area, Outer Drive Area, Lead-in Zone and Lead-out Zone 1) Layout of DVD-RO M disc Disc Center Diameter 120 mm Diameter 44mm Diameter 33mm Diameter 22mm Diameter 16mm Diameter 15mm Center Clamping 3th transition Inform ation Zone hole Zone...
  • Page 155 3) Layout of DVD+RW disc Disc Center Diameter 120 mm Diameter 44mm Diameter 33mm Diameter 22mm Diameter 16mm Diameter 15mm Center Clamping 3th transition Inform ation Zone hole Zone area 1th transition area 2th transition area area Unrecorded Disc Lead-in Zone Data Zone Lead-out Zone Outer Disc...
  • Page 156 4) Layout of DVD-R/RW disc Disc Center Diameter 120 mm Diameter 44mm Diameter 33mm Diameter 22mm Diameter 16mm Diameter 15mm Center Clamping 3th transition Unrecorded Disc hole Area area 1th transition area 2th transition area area Inform ation Area R-Information Lead-in Lead-out Data Recordable Area...

  • Page 157: Alpc(Automatic Laser Power Control) Circuit

    5. ALPC(Automatic Laser Power Control) Circuit 1) Block Diagram IC 106 ( uPC3330 ) RLDON ‘H’ CN 102 IC 201 SHAPCRE S/H & VRDC VRDC VR DCG & Gain Optical Pick-up VR DC_ HOP -7521T FPDVC uPD63630 FPDVR EF PDIN Write Strategy Write...

  • Page 158: How To Use Test Tool

    How to use test tool 1. ALPC Measurement System Configuration In order to measure and adjust DVD RW optical power, The following measurement equipments are needed. Compulsory equipment ➀ Optical Power meter & Sensor (ADVANTEST, TQ8210/Q82017A or equivalent ➁ Personal Computer (Pentium 3, 500MHz Above, , RAM:64M Above, Win98 Above) ➂...
  • Page 159 2. ALPC Program Configuration ALPC Program consists of total 4 files. ALPC.exe LgBada.dll modelnm.txt WNASPI32.DLL These 4 files should be located in one directory. ALPC.exe is a program execution file. modelmn.txt is a configuration file. Determine how to connect The following contents are included when you open "modelnm.txt" file. The following contents are included when you open LGE connect=0 connect=0 is the item which you can determine whether you use Serial or ATAPI.
  • Page 160 3. Running ALPC Program When running ALPC.exe file, the following screen appears. CD/DVD Selection ALPC Setup or LD Display what is selected Test Selection in modelnm.txt Result output window Laser Power Setup window Laser Read Laser Write Laser off When Laser EEPROM Used When inputting Power On...
  • Page 161 4 LD Test * Test DVD LD * Test DVD CD ➀ Select DVD mode ➀ Select CD mode ➁ Select Test mode ➁ Select Test mode ➂ Click ➂ Click Test Test Section VRDC VR_FPD VWDC1 VW_FPD VW2-1 VW2-2 2.4±0.08 0.53±0.22 0.02±0.01...

  • Page 162: Optical Power Setting

    5. Optical Power Setting When replacing Travers ass’y including Pick-up or Loader PCB, Optical Power Setting should be performed for Pick-up and Loading PCB’s matching. ➀ DVD LD optocal Power Setting • Select DVD and Setup mode • Push . (Read Power On. Strong Red light can be seen from pick up optical lens.) •...
  • Page 163 6. Optical Power Setting Parameter Check Use when defective happens even though LD test result is normal. When defective can be found but power test result is OK, You need to check current settings whether they are proper or not. In this case, Pressing will display ALPC Parameter Info window and show current optical power settings recorded in EEPROM(IC302).
  • Page 164 [VALID ALPC Parameters] <CD> <DVD> 1) CD-R READ Reference DAC : 70 ~ 100 1) DVD-R READ Reference DAC : 42 ~ 107 2) CD-RW READ Reference DAC : 70 ~ 100 2) DVD-RW READ Reference DAC : 42 ~ 107 3) VWDC1 : 35 ~ 65 4) VWDC1 Offset...
  • Page 165 Appendix. How to measure optical power Optical power measurement is measuring actual optical power coming out from an object lens with LD turned on. thus, In order to measure optical power, LD should to be turned on and environment need to be dark enough. If necessary, Cover the top side of the sensor with black paper or hand when measuring.

  • Page 166: Block Diagrams

    BLOCK DIAGRAMS 1. OVERALL BLOCK DIAGRAM 5-51...

  • Page 167: Dsp Block Diagram

    2. DSP BLOCK DIAGRAM L.P.F 5-52...

  • Page 168: Μ-Com Block Diagram

    3. µ-COM BLOCK DIAGRAM 5-53...

  • Page 169: Rf Block Diagram

    4. RF BLOCK DIAGRAM 5-54...

  • Page 170: Circuit Diagrams

    CIRCUIT DIAGRAMS 1. RF CIRCUIT DIAGRAM 5-55 5-56...

  • Page 171: Dsp Circuit Diagram

    2. DSP CIRCUIT DIAGRAM 5-57 5-58...

  • Page 172: Μ-Com Circuit Diagram

    3. µ-COM CIRCUIT DIAGRAM 5-59 5-60...

  • Page 173: Circuit Voltage Chart

    CIRCUIT VOLTAGE CHART MODE MODE MODE MODE MODE MODE MODE MODE MODE MODE MODE STATE STATE STATE STATE STATE STATE STATE STATE STATE STATE STATE PIN NO. PIN NO. PIN NO. PIN NO. PIN NO. PIN NO. PIN NO. PIN NO. PIN NO.

  • Page 174: Printed Circuit Diagrams

    PRINTED CIRCUIT DIAGRAMS 1. MAIN P.C.BOARD LOCATION GUIDE 5-63 5-64...
  • Page 175 2. MAIN P.C.BOARD LOCATION GUIDE 5-65 5-66...

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