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Zenith XBR411 Manual

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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
SPECIFICATIONS
...................................................................................................................... 1-5
1-1

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Summary of Contents for Zenith XBR411

  • Page 1 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 SPECIFICATIONS ........................1-5...
  • Page 2 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 LG Electronics Corporation.
  • Page 3 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 4 SPECIFICATIONS General Power requirements AC 100V, 50/60 Hz Power consumption Dimensions (approx.) 430 X 79 X 367 mm Mass (approx.) 5.5 kg Operating temperature 5 °C ~ 40 °C Standard Condition -20 °C ~ -60 °C Signal system NTSC VDR PART Read Disc Format DVD Disc : DVD Video Specification Book.
  • Page 5 SECTION 2 EXPLODED VIEWS CONTENTS EXPLODED VIEWS ........................2-2 1. Cabinet and Main Frame Section ...................2-2 2. Deck Mechanism (RL-02A)......................2-3 3. Packing Accessory Section ....................2-4...

  • Page 6: Exploded Views

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

  • Page 7: Deck Mechanism (Rl-02A)

    2. DECK MECHANISM SECTION(RL-02A)

  • Page 8: Packing Accessory Section

    3. Packing Accessory Section OPTIONAL PARTS 810 CABLE ASS'Y RF CABLE(COAXIAL) PLUG ASS'Y 1WAY BATTERY PLUG ASS'Y 2WAY REMOCON INSTRUCTION ASSEMBLY PACKING PACKING BOX CARTON...

  • Page 9: Table Of Contents

    SECTION 3 ELECTRICAL CONTENTS OVERALL WIRING DIAGRAM VDR PART ......3-2 VCR PART ELECTRICAL TROUBLESHOOTING GUIDE & WAVEFORMS ........3-60 ELECTRICAL ADJUSTMENT 1. POWER(SMPS) CIRCUIT ........3-60 PROCEDURES ............3-3 2. NO COMPONENT VIDEO SIGNAL WHEN PLAYING DISC ............3-62 VCR ELECTRICAL TROUBLESHOOTING 3. NO COMPOSIT / S-VIDEO SIGNAL WHEN GUIDE ................3-4 PLAYING DISC ............3-63...

  • Page 10: Overall Wiring Diagram

    OVERALL WIRING DIAGRAM...

  • Page 11: Vcr Part

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

  • Page 12: 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 13 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 14 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 15: System/Key Circuit

    VCR ELECTRICAL TROUBLESHOOTING GUIDE 2. SYSTEM/KEY CIRCUIT (1) AUTO STOP Auto Stop Check the Drum Motor Does the SW30 waveform appear at IC501 Pin18? signal. Do T/UP Reel Pulses Do the T-UP Reel Pulses Does 5V appear at the appear at the point appear at IC501 Pin80? RS501? between R556 and R536?

  • Page 16: 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 the height adjustment of CTL Head. at IC501 Pin97? the CTL Head accurate? Confirm the CFG Check Deck Motor.
  • Page 17 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? Check the PMC01 and the Capstan Does the PWM signal appear at IC501 Pin77? Motor Ass’y.

  • Page 18: Osd Circuit

    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 Pin78? Trouble Shooting”. Does FLD change when Replace the defective a function button is switches. pressed? 4.

  • Page 19: Y/C Circuit

    VCR ELECTRICAL TROUBLESHOOTING GUIDE 5. Y/C CIRCUIT (1) No Video in EE Mode, No Video in EE Mode Does the Video signal Check VDR Video Input appear at IC301 (PMD02 Pin 5), Tuner Video Pins28, 30, 32? Input (TU701 Pin24), Line Video Input (IC602 Pins 1, 3, 5, 7), respectively.
  • Page 20 VCR ELECTRICAL TROUBLESHOOTING GUIDE 3. Y/C CIRCUIT (2) When the Y(Luminance) signal doesn’t appear on the screen in PB Mode, Is 5V applied to IC301 Check the line of the REG 5V Line. (Power Circuit) Pins23, 44, 45, 52, 68, 77? Is the Y/C Bus siganl Refer to ‘SYSTEM Y/C applied to IC301 Pins53,...
  • Page 21 VCR ELECTRICAL TROUBLESHOOTING GUIDE 3. Y/C CIRCUIT (3) When the C(Color) signal doesn’t appear on the screen in PB Mode, Is 5V applied to IC301 Check the line of the REG 5V Line. (Power Circuit) Pins23, 44, 45, 52, 68, 77? Does the Color signal Is X301 (3.58MHz) appear at IC301...
  • Page 22 VCR ELECTRICAL TROUBLESHOOTING GUIDE 3. Y/C CIRCUIT (4) When the Video signal doesn’t appear on the screen in REC Mode, REC mode Is EE mode normal? Check the EE mode Is brightness normal? Is color normal? Is the brightness signal sup- Does signal appear at Check X301 oscillation IC301 Pins41, 50?

  • Page 23: Tuner/If Circuit

    VCR ELECTRICAL TROUBLESHOOTING GUIDE 6. Tuner/IF CIRCUIT (1) No Picture on the TV screen No picture on the TV screen Does the Video signal Is +33V applied to TU701 Check 33V line. appear at TU701 Pin16. Pin14? Is +5V applied to TU701 Check 5V line.
  • Page 24 VCR ELECTRICAL TROUBLESHOOTING GUIDE (B) No Sound No Sound. Check the Vcc of IC801 Pins15, 32, 36, Check 5.2V Line. Check the Tuner SiF signal at IC801 Check the Tuner SIF of TU701 Pin22. Pin57. Check the oscillator of IC801 Pin51. Replace X301 Check the IIC Clock and Data at IC801 Check the Audio of IC801 Pins78, 80.

  • Page 25: Hi-Fi Circuit

    VCR ELECTRICAL TROUBLESHOOTING GUIDE 7. Hi-Fi CIRCUIT (1) No Sound(EE Mode) No Sound. Check the DVD Audio of IC801 Check the VDR MODULE. (PMD02 Pins23, 25). Pins12, 74. Check the AV1 Audio of IC801 Check the RCA Jack. (JK601 Scart1 Audio in L, R). Pins11,73.
  • Page 26 VCR ELECTRICAL TROUBLESHOOTING GUIDE 3. Y/C CIRCUIT (2) Hi-Fi Playback PB mode No Sound. Check the Vcc of IC801 Check Power 5.2V, 9V. (Pins3, 15, 32, 36, 46, 54) Check the Hi-Fi Selection switch. Check IC501 Pin19 (A.H/SW) (IC801 Pin39) and the Tape quality. Is the RF Envelope at IC801 Pin23 over 2Vp-p? Check IC801 Pin37(Data),...
  • Page 27 VCR ELECTRICAL TROUBLESHOOTING GUIDE Hi-Fi REC. It can’t be recorded Hi-Fi Audio signal. Check Vcc of IC801. Check Power 5V, 9V. (Pins3, 15, 32, 36, 46, 54) Check ports of µ-COM. Check IC801 Pin37(Data), Pin38(CLOCK). (IC501 pins 71, 72) Check Audio input signal of IC801 Do Audio signals appear at IC801 Pins11, 73(AV1), 12, 74(VDR.A.), 9, Pins78, 80?

  • Page 28: 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 29: Tuner/Mtz Block Diagram

    2. TUNER/MTZ BLOCK DIAGRAM 875 MOD A.IN MOD CTL 106 5V VCR 'H' 671 MOD VEDIO TU.V.OUT IIC CLK IIC DATA 781 SIF OUT LGXBR446 (LGEUS) 3-22 3-23...

  • Page 30: Y/C Block Diagram

    3. Y/C BLOCK DIAGRAM (PB Mode) (REC Mode) 55 54 53 51 50 49 48 47 55 54 53 320FH SERIAL VX01 DECODER AUDIO C-ROT MUTE RF-SW HA SW CLAMP CLAMP EP REC EP PB 'A' CLAMP IC302 EP PB 'B' CLAMP TU/LINE1 MAIN...

  • Page 31: Normal Audio Block Diagram

    4. NORMAL AUDIO BLOCK DIAGRAM (EE Mode) (PB Mode) (REC Mode) LGXBR446 (LGEUS) 3-26 3-27...

  • Page 32: Jack Block Diagram

    5. 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 Video Out 5) VDR CVBS 7) VCR Video 9) Y (Super)

  • Page 33: Hi-Fi Block Diagram

    6. Hi-Fi BLOCK DIAGRAM Hi-Fi/ AUDIO INPUT 26 27 BLOCK DEMO DULATE FM MODU A.OUT 'L' DE MODU DVD A.IN 'L' A.OUT DVD AUDIO To VDR A.OUT 'R' DVD A.IN 'R' AV1 A.IN 'L' INPUT REAR JACK OUTPUT SELECT AV1 A.IN 'R' SELECT AV2 A.IN 'L' IC801...

  • Page 34: System Block Diagram

    7. SYSTEM BLOCK DIAGRAM TO/FROM DECK 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 C.ROT MODE S4 MODE S3 A.MUTE'H' DISPLAY...

  • Page 35: Circuit Diagrams

    CIRCUIT DIAGRAMS IMPORTANT SAFETY NOTICE CUIT. SPECIAL COMPONENTS ARE SHADED ON THE NOTE : 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 36: Tu/If Circuit Diagram

    2. TU/IF CIRCUIT DIAGRAM EE MODE(VIDEO) TU MODE(AUDIO) 3-36 3-37...

  • Page 37: A/V Circuit Diagram

    3. A/V CIRCUIT DIAGRAM IC301 doesn’t operate. IC301 Pins 53, 54, 55 are defective. PB COLOR Signal disappear. X301 is defective. PB COLOR Signal does not appear. IC301 Pin 57 is defective. Auto Tracking has failed. IC301 Pin 59 is defective. EE, PB Screen doesn’t appear.

  • Page 38: Jack Circuit Diagram

    4. JACK CIRCUIT DIAGRAM 3-40 3-41...

  • Page 39: Hi-Fi Circuit Diagram

    5. Hi-Fi CIRCUIT DIAGRAM 3-42 3-43...

  • Page 40: System Circuit Diagram

    6. SYSTEM CIRCUIT DIAGRAM µ-COM is unstable. Deck will not operate. Q501, Q503 are defective. MS501 is defective. µ-COM will not operate. X502 is defective. VCR will not operate. IC505 is defective. CLOCK SETTING will not operate. X501 is defective. Auto stop occures.

  • Page 41: Timer Circuit Diagram

    7. TIMER CIRCUIT DIAGRAM 3854R17328A 3-46 3-47...

  • Page 42: Front A/V, 1394 Jack Circuit Diagram

    8. FRONT A/V, 1394 JACK CIRCUIT DIAGRAM 3-48 3-49...

  • Page 43: Waveforms

    •WAVEFORM * IC301 WAVEFOM * IC501 WAVEFOM Stop : 10.0KS/s 280 Acqs Stop : 250KS/s 299 Acqs Stop : 10.0KS/s 18 Acqs Trigger Position: 12% Stop : 10.0KS/s 27 Acqs 1.00 V M 5.00ms 3.04 V 1.00 V M5.00ms 3.04 V 1.00 V M 200 s 3.04 V...

  • Page 44: Circuit Voltage Chart

    • CIRCUIT VOLTAGE CHART MODE MODE MODE MODE MODE PLAY Location PLAY PLAY PLAY PLAY PLAY PIN NO. PIN NO. PIN NO. PIN NO. PIN NO. I C 3 0 1 I C 7 0 1 0.68 0.93 Q301 4.97 4.91 4.26 4.96...

  • Page 45: Printed Circuit Diagrams

    PRINTED CIRCUIT DIAGRAMS 1. VCR P.C.BOARD LOCATION GUIDE 3-54 3-55...

  • Page 46: Power P.c.board

    2. POWER P.C.BOARD LOCATION GUIDE...

  • Page 47: Jack P.c.board

    5. JACK P.C.BOARD LOCATION GUIDE...

  • Page 48: 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 49 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 Check or Replace at the IC152 pin1? the D122 at the IC151 pin1? the D124 the D124 Is there about 3.3V~ Check the ‘DVD PWR CTL Is there about 3.3V~ 5V Check the ‘DVD PWR CTL...

  • Page 50: 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 R609, C613 R608, C612 R607, C611 IC610 – 10 IC610 – 12 IC610 – 14 Check input Check input Check input...

  • Page 51: Composit / S-Video Signal When Playing Disc

    3. No COMPOSIT / S-VIDEO signal when playing DISC COMPOSIT : No Signal S-VIDEO : No Y Signal S-VIDEO : No C Signal R606, C610 R602, C602 R601, C601 IC610 – 4 IC610 – 6 IC610 – 2 Check input Check input Check input C650...

  • Page 52: Tv, External Input Video Signal

    4. No TV, External Input video signal No : TV signal No : AV1 signal No : AV2 signal No : S-JACK signal TV 701-17 IC7711 – 1, 3, 8 Check signal And IC602 - 1 IC602 - 3 check circuit IC602 –...

  • Page 53: When Playing Disc, No Audio Output

    5. When playing DISC, no audio output 7. No OPTICAL / DIGITAL output IC802-14 : HIGH Check AV_RST1, PN303-1 signal Check VCR PART DAC RESET status power and other cir- normal IC802-11 I2C signal Check R154, R155, Check FFC Cable normal R851, R852 Signal flow...

  • Page 54: External Input 1 Audio

    8. No External Input 1 audio 9. No External Input 2 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 55: Block Diagrams

    BLOCK DIAGRAMS 1. VDR MAIN H/ W BLOCK DIAGRAM YC_MIXER A2_IN V2_IN 3-67...

  • Page 56: Power Block Diagram

    2. POWER BLOCK DIAGRAM 3-68...

  • Page 57: Audio In/ Out Block Diagram

    3. AUDIO IN/ OUT BLOCK DIAGRAM 3-69...

  • Page 58: Cpu & Control Register Block Diagram

    4. CPU & Control Register BLOCK DIAGRAM 3-70...

  • Page 59: Video In/ Out Block Diagram

    5. VIDEO IN/ OUT BLOCK DIAGRAM 3-71...

  • Page 60: Dv 1394 In/Out Block Diagram

    6. DV 1394 IN/OUT BLOCK DIAGRAM 3-72...

  • Page 61: Memory Card In/ Out Block Diagram

    7. MEMORY CARD IN/ OUT BLOCK DIAGRAM 3-73...

  • Page 62: Circuit Diagrams

    CIRCUIT DIAGRAMS 1. BGA 308P CIRCUIT DIAGRAM 3-74 3-75...

  • Page 63: Ddr & B To B Connector Circuit Diagram

    2. DDR & B TO B CONNECTOR CIRCUIT DIAGRAM 3-76 3-77...

  • Page 64: Power, Flash, Connector Circuit Diagram

    3. POWER, FLASH, CONNECTOR CIRCUIT DIAGRAM 3-78 3-79...

  • Page 65: Rst, Control/Status_Reg., Atapi

    4. RST, CONTROL/STATUS_REG., ATAPI, HOST_CPLD, LATCH CIRCUIT DIAGRAM 3-80 3-81...

  • Page 66: Video_In, Video_Out Circuit Diagram

    5. VIDEO_IN, VIDEO_OUT CIRCUIT DIAGRAM 3-82 3-83...

  • Page 67: Dv1394, Hdmi Circuit Diagram

    6. DV1394, HDMI CIRCUIT DIAGRAM 3-84 3-85...

  • Page 68: Audio In/Out Circuit Diagram

    7. AUDIO IN/OUT CIRCUIT DIAGRAM 3-86 3-87...

  • Page 69: Waveforms

    • WAVEFORMS X101 IC4009 IC502 PN303 IC802 IC802 13.5MHz PIN32 PIN29 PIN1 PIN3 PIN5 IEC958 ADAC_MCLK ADAC_SCLK PN304 IC502 IC502 IC802 IC802 IC802 PIN5 PIN40 PIN74 PIN4 PIN6 PIN7 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 70: 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 0.04 3.26 3.254 3.253 0.006 0.004 0.006...

  • Page 71: Printed Circuit Diagrams

    PRINTED CIRCUIT DIAGRAMS 1. VCR P.C.BOARD(TOP VIEW) LOCATION GUIDE 3-92 3-93...

  • Page 72: Power P.c.board (Bottom View)

    2. POWER P.C.BOARD (BOTTOM VIEW) LOCATION GUIDE 3-94 3-95...
  • Page 73 3-96 3-97...

  • Page 74: Rl-02A Loader Part

    RL-02A LOADER PART CONTENTS ELECTRICAL TROUBLESHOOTING GUIDE ....................3-98 WAVEFORMS ................................3-112 1. POWER & RESET SIGNAL............................3-112 2. MAIN CLOCK1 FOR IC202 (16.9MHZ) ........................3-112 3. MAIN CLOCK2 FOR IC302 (20MHZ) ........................3-113 4. SDRAM CLOCK................................3-113 5. TRAY OPEN/CLOSE SIGNAL 1 ..........................3-114 6. TRAY OPEN/CLOSE SIGNAL 2 ..........................3-114 7.

  • Page 75: Electrical Troubleshooting Guide

    RL-02A LOADER PART 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 CN202 •Check the power cable. +12V, +5V respectively after the power •Repair the power part.
  • Page 76 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? Does laser turn on? Go to “Laser operating is abnormal”...
  • Page 77 Tray operating is abnormal Tray open doesn ’t work. Is the Input voltage 0V at IC301 •Check the connection of IC301 pin 60. pin 60 when push the •Replace the EJECT SW. EJECT SW? •Check the connection of IC107 pin 19. Is there tray •Replace the IC103.
  • Page 78 Sled operating is abnormal Is there sled control signal output? Replace the IC107 (IC107 pin 8,9) Is there •Check the connection of IC105 pin 29, 30. sled drive signal input? •Replace the IC102. (IC102 pin 29, 30) •Check the R130, R131. Is there Is DRV-CTRL1 sled drive voltage output?
  • Page 79 Spindle operating is abnormal Is there Is there spindle control DSP spindle control signal input? output(IC201 pin 130)? (IC102 pin 26) •Check the R145,R143. •Replace the IC104 Replace the IC201. Is there Is there spindle drive voltage output? SFG signal input? (IC102 pin 11,13,16) (IC301 pin 28) Replace the Spindle Motor...
  • Page 80 Focus Servo is unstable Is FE signal output normal in Focusing Replace the IC106. Up/Down? (IC106 pin 87) Is FDRV signal output normal in Focusing •Check the R177. Up/Down? •Replace the IC106. (IC201 pin 131) Go to “Focus Actuator operating is abnormal” Focus Actuator operating is abnormal.
  • Page 81 Track Servo is unstable Is TE signal Is pick-up output normal in focusing (E, F, G, H)output normal? ON and tracking OFF? (CN102 pin 5, 8, 9, 12) (IC106 pin 85) Replace the IC107. •Check the pick-up FFC. •Replace the pick-up. •After replacing Perform 5.
  • Page 82 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 RF signal IC106(Pin113) •Check the pick-up FFC and CN102. RFO(TP161)is •Replace the pick-up unit. 500~1000mVpp? Check RFEQO waveform Replace the IC106...
  • Page 83 Recognition Fail Case 2:DVD Fail Check pick-up read power Go to “LD CHECK”. was 0.9~1.1mW? Is IC301 pin 46(LDEN-DVD)level Replace the IC301. was about 0V? Is there RF signal at CN102 Replace the pick-up. pin 13,14. Is there RF signal Replace the IC106 at IC106 pin 95.
  • Page 84 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 85 CD/DVD ? 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 LDEN-DVD. Check the input of LDEN-DVD.
  • Page 86 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 LDEN-DVD. Check the input of LDEN-DVD. (pin 17 of CN102 : ‘H’) (pin 17 of CN102 : ‘H’) Check the input of VWDC.
  • Page 87 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 ±R disc.
  • Page 88 Writing Part Check Load tray with DVD ±R/RW disc. Press the “REC” key. Do the IC302 pin 58,59 output toggle signals during writing? Check and replace the IC301. Does writing finish without any error? Is the written file Eject tray. read normally? Go to “LD CHECK”.

  • Page 89: Waveforms

    WAVEFORMS 1. POWER & RESET Signal 12 V(CN202 PIN4) 5 V(CN202 PIN 1) /HRST(IC202 PIN 3) /RST(IC202 PIN2) POWER IN 2. Main Clock1 for IC202 (16.9MHz) X201(IC201 PIN 3) GND LEVEL 3-112...

  • Page 90: Main Clock2 For Ic302 (20Mhz)

    3. Main Clock2 for IC302 (20MHz) X300(IC301 PIN 13) 4. SDRAM Clock 3-113...

  • Page 91: Tray Open/Close Signal 1

    5. TRAY OPEN/CLOSE SIGNAL 1 /EJECT-KEY (SW 302 PIN1) TRAY-CTRL (IC102 PIN46) TRAY+(CN303 PIN 1) TRAY-(CN303 PIN 2) OPEN CLOSE 6. TRAY OPEN/CLOSE SIGNAL 2 /EJECT-KEY (SW 302 PIN1) TRAY-CTRL (IC102 PIN46) /OPEN-SW (CN303 PIN 4) /LOAD-SW (CN303 PIN 5) OPEN CLOSE 3-114...

  • Page 92: Sled Move Signal 1

    7. SLED MOVE SIGNAL 1 STEP1 (IC107 PIN8) STEP2 (IC107 PIN9) A+(CN100 PIN 2) A-(CN100 PIN 1) ZOOM 8. SLED MOVE SIGNAL 2 STEP1 (IC107 PIN8) STEP2 (IC107 PIN9) A+(CN100 PIN 2) A-(CN100 PIN 1) 3-115...

  • Page 93: Focus Search Signal

    9. FOCUS SEARCH SIGNAL FDRV (IC104 PIN13) F+ (IC102 PIN 52) F- (IC102 PIN 51) 10. LASER TURN ON SIGNAL F+ (IC102 PIN 52) LDEN-DVD(CN102 PIN17) VRDC(CN102 PIN 34) 3-116...

  • Page 94: Disc Type Judgement Waveform (Cd Series)

    11. DISC TYPE JUDGEMENT WAVEFORM (CD SERIES) F+ (IC102 PIN 52) FE (IC106 PIN87) ZOOM 12. DISC TYPE JUDGEMENT WAVEFORM (CD&CD-R) F+ (IC102 PIN 52) FE (IC106 PIN87) 3-117...

  • Page 95: Disc Type Judgement Waveform (Cd-Rw)

    13. DISC TYPE JUDGEMENT WAVEFORM (CD-RW) F+ (IC102 PIN 52) FE (IC106 PIN87) 14. DISC TYPE JUDGEMENT WAVEFORM (DVD SERIES) F+ (IC102 PIN 52) FE (IC106 PIN87) ZOOM 3-118...

  • Page 96: Disc Type Judgement Waveform (Dvd_Single&R)

    15. DISC TYPE JUDGEMENT WAVEFORM (DVD_SINGLE&R) F+ (IC102 PIN 52) FE (IC106 PIN87) 16. DISC TYPE JUDGEMENT WAVEFORM (DVD _DUAL) F+ (IC102 PIN 52) FE (IC106 PIN87) 3-119...

  • Page 97: Disc Type Judgement Waveform (Dvdrw)

    17. DISC TYPE JUDGEMENT WAVEFORM (DVDRW) F+ (IC102 PIN 52) FE (IC106 PIN87) 18. SPINDLE WAVEFORM1 MDRV (IC104 PIN 9) SRVC (IC104 PIN 10) SFG((IC102 PIN43) 3-120...

  • Page 98: Spindle Waveform2

    19. SPINDLE WAVEFORM2 U((IC101 PIN11) V((IC101 PIN13) W((IC101 PIN16) SFG((IC102 PIN43) 20. FOCUS ON SIGNAL(CD) F+ (IC102 PIN 52) FE (IC106 PIN87) T+ (IC102 PIN 54) TE (IC106 PIN85) ZOOM 3-121...

  • Page 99: Focus On Signal(Dvd)

    21. FOCUS ON SIGNAL(CD) F+ (IC102 PIN 52) FE (IC106 PIN87) T+ (IC102 PIN 54) TE (IC106 PIN85) 22. FOCUS ON SIGNAL(DVD) F+ (IC102 PIN 52) FE (IC106 PIN87) T+ (IC102 PIN 54) TE (IC106 PIN85) ZOOM 3-122...

  • Page 100: Track Off Signal(Cd)

    23. FOCUS ON SIGNAL (DVD) F+ (IC102 PIN 52) FE (IC106 PIN87) T+ (IC102 PIN 54) TE (IC106 PIN85) 24. TRACK OFF SIGNAL(CD) TE (IC106 PIN85) TZC(IC106 PIN74) MIRRBCA (IC106 PIN77) 3-123...

  • Page 101: Track Off Signal(Dvd)

    25. TRACK OFF SIGNAL(DVD) TE (IC106 PIN85) TZC(IC106 PIN74) MIRRBCA (IC106 PIN77) 26. Tilt Driver signal(Disc reading) TILTDRV(IC102 PIN47) TILT+(IC102 PIN50) TILT-(IC102 PIN49) 3-124...

  • Page 102: Rf Waveform(Dvd)

    27. RF WAVEFORM(DVD) RFP(IC106 PIN2) RFO(IC106 PIN 113) RFI(IC106 PIN 95) 28. RF WAVEFORM(CD) RFP(IC106 PIN2) RFO(IC106 PIN 113) RFI(IC106 PIN 95) 3-125...

  • Page 103: Wobble(Dvd-R/Rw)_Reading

    29. WOBBLE(DVD-R/RW)_READING AWOBBLE(IC106 PIN81) LPP/HEAD (IC106 PIN 73) 30. WOBBLE(DVD+R/RW)_READING&WRITING =>X1 SPEED AWOBBLE(IC106 PIN81) LPP/HEAD (IC106 PIN 73) 3-126...

  • Page 104: Ld Enable(Dvd)

    31. LD Enable(DVD) LDENDVD (CN102 PIN 17) LDENCD (CN102 PIN 38) 32. LD Enable(CD) LDENDVD (CN102 PIN 17) LDENCD (CN102 PIN 38) 3-127...

  • Page 105: Laser Power(Reading)_Dvd+Rw

    33. Laser Power(reading)_DVD+RW VRDC(CN102 PIN 34) VWDC1(CN102 PIN 36) VWDC2(CN102 PIN 35) OPECTRG (IC1201 PIN 165) 34. Laser Power(Erase)_DVD+RW VRDC(CN102 PIN 34) About VWDC1(CN102 PIN 36) 440mv VWDC2(CN102 PIN 35) OPECTRG (IC1201 PIN 165) 3-128...

  • Page 106: Laser Power(Writing)_Initial State

    35. Laser Power(Writing)_initial state VRDC(CN102 PIN 34) VWDC1(CN102 PIN 36) VWDC2(CN102 PIN 35) OPECTRG (IC1201 PIN 165) 36. Laser Power(Writing)_Processing VRDC(CN102 PIN 34) VWDC1(CN102 PIN 36) VWDC2(CN102 PIN 35) 3-129...

  • Page 107: 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 3-130...

  • Page 108: Disc Specification

    2. Disc Specification 3. Disc Materials 1) DVD-ROM < Single Layer > < Dual Layer > 3-131...
  • Page 109 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 110 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 111 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 112: 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 113 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 Inner Disc...
  • Page 114 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 115: 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 116: 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 ➂...
  • Page 117 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 118 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 Used When inputting When Laser EPROM Data to EFROM after Lser...
  • Page 119 4 LD Test Test for grasping good/bad, level of DVD LD and CD LD ➀ DVD LD Test Select “DVD” and “Test” ➁ Click Test ➂ CD LD Test Select “CD” and “Test” ➃ Click Test Section VRDC VR_FPD VWDC1 VW_FPD VW2-1 VW2-2...
  • Page 120 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 • Push . (Read Power On. Strong Red light can be seen.) •...
  • Page 121 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.
  • Page 122 [VALID ALPC Parameters] <CD> <DVD> 1) CD-R READ Reference DAC : 30 ~ 120 1) CD-R READ Reference DAC : 40 ~ 145 2) CD-RW READ Reference DAC : 80 ~ 250 2) CD-RW READ Reference DAC : 40 ~ 145 3) VWDC1 : 10 ~ 39 3) VWDC1...
  • Page 123 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 124: Block Diagrams

    BLOCK DIAGRAMS 1. Overall Block Diagram 3-147...

  • Page 125: Rf Block Diagram

    2. RF Block Diagram 3-148...

  • Page 126: Psp Block Diagram

    3. PSP Block Diagram 3-149...

  • Page 127: Micom Block Diagram

    4. MICOM Block Diagram 3-150...

  • Page 128: Circuit Diagrams

    CIRCUIT DIAGRAMS 1. RF CIRCUIT DIAGRAM 3-151 3-152...

  • Page 129: Dsp Circuit Diagram

    2. DSP CIRCUIT DIAGRAM 3-153 3-154...

  • Page 130: Μ-Com Circuit Diagram

    3. µ-COM CIRCUIT DIAGRAM 3-155 3-156...

  • Page 131: Circuit Voltage Chart

    CIRCUIT VOLTAGE CHART MODE MODE MODE MODE MODE STATE STATE STATE STATE STATE PIN NO. PIN NO. PIN NO. PIN NO. PIN NO. I C 1 0 1 I C 1 0 2 I C 1 0 3 I C 1 0 8 I C 1 0 4 I C 1 0 5 I C 1 0 6...

  • Page 132: Printed Circuit Diagrams

    PRINTED CIRCUIT DIAGRAMS 1. MAIN P.C.BOARD LOCATION GUIDE 3-159 3-160...
  • Page 133 2. MAIN P.C.BOARD LOCATION GUIDE 3-161 3-162...
  • Page 134 SECTION 4 MECHANISM OF VCR PART(D-37) CONTENTS POSITION DRAWING OF DECK DECK MECHANISM ADJUSTMENT MECHANISM PARTS • Fixtures and tools for service ....4-12 1. Check of Mechanism Assembly Mode ..4-13 • Top View............4-1 2. Previous Preparation for • Bottom View ..........4-1 Deck Adjustment ........4-14 3.
  • Page 135 POSITION DRAWING OF DECK MECHANISM PARTS • Top View Order Of Dis- Ref. Posi assembled Part Fixing Type Draw- tion Parts firstly ings Disassembled 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...
  • Page 136 DISASSEMBLY AND ASSEMBLY OF DECK MECHANISM Drum Assembly Cable Flat (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 cable flat from the Drum FPC and the Capstan Motor.
  • Page 137 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 138 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 139 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 140 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 141 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 142 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 143 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) (L2) Gear Drive (Fig. A-7-5) (Fig. A-7-1) Gear Drive Hole(A) Lever Tension (Fig.
  • Page 144 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 145 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 146 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 147 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 148 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 149 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 150 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 151 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 152 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 153 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 154 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 155 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 156 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 157 MECHANISM TROUBLESHOOTING GUIDE 1.Deck Mechanism No Auto Rewind operates. Is output of the end sensor “H”? “H”: 3.5V or less “L”: 0.7V –1V or less Is the end sensor Vcc applied at Check the Syscon power supply. Replace the end sensor. Is voltage at both ends of the Replace the LED.
  • Page 158 MECHANISM TROUBLESHOOTING GUIDE Auto Stop operates. (PLAY/CUE/REV) Check the assembly mode. Check the spring pinch. Does the pinch roller attached to the Capstan shaft turn in opera- Is output of the DFG, DPG Replace the drum motor. tion of the Play/Cue/Rev. normal? Does the T/UP or the supply Check the Servo, Syscon.
  • Page 159 MECHANISM TROUBLESHOOTING GUIDE No tape winding is done in play. Is the pinch roller attached to the Check the assembly mode? Capstan shaft in operation of play? Does the T/up reel operate? Is the Capstan belt hung? Hang the Capstan belt. Check the clutch and the idler Does the Capstan motor turn? assembly.
  • Page 160 MECHANISM TROUBLESHOOTING GUIDE 2. Front Loading Mechanism No cassette insert is done. Does the lever assembly Is the lever assembly switch Add or replace the lever switch operate? spring normal? assembly switches spring. Does the CST IN switch Replace the F/L switch. operate normally? Is the Vcc of the main P.C.B assembly?
  • Page 161 MECHANISM TROUBLESHOOTING GUIDE No safe adherence of tape is done. Is cassette insert done? Does the opener lid operate? Replace the opener lid. Does the gear rack F/L operate? Replace the gear rack F/L. Does the opener door operate? Check the assembly status of the Does the arm assembly F/L operate? opener door.
  • Page 162 EXPLODED VIEWS 1. Front Loading Mechanism Section 4-28...
  • Page 163 EXPLODED VIEWS 2. Moving Mechanism Section (1) OPTIONAL PART 4-29...
  • Page 164 EXPLODED VIEWS 3. Moving Mechanism Section (2) 4-30...

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