Zenith XBV 443 Service Manual Download Page 20

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3-11

5. Y/C CIRCUIT

(1) No Video in EE Mode,

No Video in EE Mode

Check the Tuner Pin16V

Check the SW 5V, 5.3VA
Line.(Power Circuit)

Is I

C BUS signal applied

to the IC301 Pins73, 74?

Does the Video signal
appear at the IC301
Pin15?

Is 5.0V applied to the
IC301Pins4, 22, 47, 60, 84?

Does the Video signal
appear at the IC301
Pin29?

Does the Video signal
appear at the IC501
Pin52?

Does the Video signal
appear at the IC602
Pin7?

Check the path of the sig-
nal between the IC301 Pin
29 and IC501 Pins50.

Is there Vcc 5V on the
IC602 Pin6

Does the Video signal appear at
the IC602 Pin1(DVD MODE)

Replace the IC602.

Check the 5V.
(Power Circuit)

Check the C327.(AGC)

Check the System Circuit.

YES

Summary of Contents for XBV 443

Page 1: ......

Page 2: ...CONTENTS SECTION 1 SUMMARY SECTION 2 CABINET MAIN CHASSIS SECTION 3 ELECTRICAL SECTION 4 MECHANISM OF VCR PART SECTION 5 MECHANISM OF DVD PART SECTION 6 REPLACEMENT PARTS LIST...

Page 3: ...MARY CONTENTS PRODUCT SAFETY SERVICING GUIDELINES FOR VIDEO PRODUCTS 1 3 SERVICING PRECAUTIONS 1 4 General Servicing Precautions Insulation Checking Prodedure Electrostatically Sensitive Devices SPECI...

Page 4: ...YS WHEN THE HIGH VOLTAGE IS AT THE FACTORY SPECIFIED LEVEL THE PROPER VALUE IS GIVEN IN THE APPLICABLE SCHEMATIC OPERA TION AT HIGHER VOLTAGES MAY CAUSE A FAILURE OF THE PIC TURE TUBE OR HIGH VOLTAGE...

Page 5: ...g Metal pan els Input terminals Earphone jacks etc Electrostatically Sensitive ES Devices Some semiconductor solid state devices can be damaged easily by static electricity Such components commonly ar...

Page 6: ...or 4 Swichable VCR SPECIFICATIONS Head system Four head helical scan azimuth system Timer 12 hour display type with AM PM Tape speed SP 33 35 mm sec LP 16 67 mm sec SLP 11 12 mm sec Tape width 12 7 mm...

Page 7: ...2 1 SECTION 2 CABINET MAIN CHASSIS CONTENTS 1 EXPLODED VIEWS 2 2 1 Cabinet and Main Frame Section 2 2 2 Packing Accessory Section 2 3...

Page 8: ...LODED VIEWS 1 Cabinet and Main Frame Section A43 A60 260 A44 A26 A00 250 300 462 467 467 457 467 A46 A47 468 468 468 323 265 467 465 330 452 452 261A 261A 261A 261A 285 274 283 284 286 280 A 5 4 3 2 1...

Page 9: ...ccessory Section BATTERY 808 BAG 804 PACKING CASING 803 806 INSTRUCTION ASSEMBLY CABLE COAXIAL 810 CABLE ASS Y RF 801 REMOTE CONTROLLER ASSEMBLY 900 BOX 802 PACKING CASING 803 811 812 PLUG ASS Y 1WAY...

Page 10: ...GUIDE WAVEFORMS 3 56 1 System Clock X601 27Mhz 3 56 2 Initializing between MPEG and SDRAM 3 56 3 Initializing between MPEG and Flash 3 57 4 Reference Voltage 1 3 57 5 Reference Voltage 2 3 58 6 Check...

Page 11: ...GND 5 3VA 33VA GND 4VA 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 PMD01 PMD02 Vcc HF RF DVD_LD DVD_PD VOL DVD GND VC_INPUT Vcc HF F E A D C B F T T F Vcc GND CD_LD CD_PD VOL CD 1 2 3 4 5 6 7 8 9 10 11 12 13 14...

Page 12: ...time difference which is from the selected A B Head point of the H SW TP signal to the starting point of the vertical synchronized signal to 6 5H 0 5H 412 s 1H 63 s PG Adjustment Method a 1 Payback t...

Page 13: ...the F101 Use the same Fuse Is the F101 normal Is the R101 normal Is the BD101 normal NO NO NO NO NO NO NO NO NO Replace the BD101 Replace the R101 Is the D102 normal Replace the D118 MTK D112 ST Repl...

Page 14: ...0 Is the Q162 Base H NO NO Check the PWR CTL H signal from com YES YES YES 2 No 5V No 3 3V Check or Replace the D111 Check the PWR CTL H signal from com Is there about 3 7V at the IC152 pin1 Is there...

Page 15: ...lace YES 7 No 8V Check or Replace the D110 NO NO Check the PWR CTL H signal from com NO 33V Is the Vcc 12V supplied to Q165 Collector Check or Replace the D110 Is the Vcc 10V sup plied to Q165 Base Ch...

Page 16: ...the R531 Refer to SMPS 5 3VA troubleshooting Check the IC501 Pins22 23 24 25 Do T UP Reel Pulses appear at the point between R556 and R536 Replace the T UP Reel Sensor RS501 Check the CST SW and the p...

Page 17: ...um Motor 2 doesn t run Do the DFG Pulses appear at the PMC01 Pin11 Replace the DRUM M or CAP M Aren t the foil patterns and the Components between IC501 Pin 90 and PMC01 Pin11 short Replace the IC501...

Page 18: ...n77 and PMC01 Pin9 short Does the CFG signal come into the IC501 Pin87 Aren t the foil patterns and Components between IC501 Pin77 and PMC01 Pin9 short 2 SERVO CIRCUIT 3 When the Capstan Motor doesn t...

Page 19: ...llation occur at the IC501 Pins44 45 Replace the IC501 The I2 C waves don t come out Does Power appear at the Pull up impedence R569 R507 Replace the IC501 Refer to SMPS 5 3VA Trouble Shooting Replace...

Page 20: ...22 47 60 84 Does the Video signal appear at the IC301 Pin29 Does the Video signal appear at the IC501 Pin52 Does the Video signal appear at the IC602 Pin7 Check the path of the sig nal between the IC...

Page 21: ...Check the System Circuit IC501 Pin18 Check the V H S W level Check R328 Check the IC301 Refer to SYSTEM I2 C BUS CHECK Trouble Shooting Is the V H S W signal applied to the IC301 Pin70 Is V H S W H ab...

Page 22: ...he IC301 Pins 22 47 60 84 Is the Color signal applied to the IC301 Pin 57 Check the SW 5V 5 3V Line Power Circuit Replace the X301 Check the Color Pass Is normal the X301 3 58MHZ of oscillation Freque...

Page 23: ...he IC301 Pin76 Check EE Mode Check the system of REC H IC501 pin74 Replace the IC301 Check the SW 5V 5 3VA Line Power Circuit Check PB Mode Does the REC H 4V 5V signal appear at the Q303 Q307 Base Che...

Page 24: ...32 36 46 54 YES Check the IIC Clock and DATA at IC801 Pins37 38 YES Check the Audio of IC801 Pins78 80 YES Check the Audio of C804 C854 YES Check the JK601 Check the TU701 SIF Pin13 NO Check the DVD M...

Page 25: ...pe quality Is the RF Envelope at IC801 Pin23 over 3Vp p YES Check IC801 Pin37 Data Pin38 Clock YES Do Audio Signals appear at IC801 Pin80 L CH 78 R CH YES Do Audio Signals appear at JK601 Check Power...

Page 26: ...ear at IC801 Pin6 YES Do Audio signals appear at IC301 Pin76 Normal Audio YES Do OSC signals appear at P3D02 pins4 5 50Vp p YES YES Check Power NO Check ports of CPM IC501 Pins71 72 Check Audio input...

Page 27: ...NO Does the Video signal at the IC609 Pin 23 YES NO Check the signal flow from IC609 Pin23 to JK901 Pin Video out YES Check 33V line NO Check 5V line NO YES Does the Clock signal appear at TU701 Pin9...

Page 28: ...the Tuner SiF signal at IC801 Pin57 YES Check the Audio of IC801 Pins78 80 YES Check the Signal flow from IC801 Pins78 80 to JK901 Audio out L R YES Check the Tuner SIF of TU701 Pin13 NO 1 Check the...

Page 29: ...C163 R133 L122 C126 RECTIFIER SMOOTING BLOCK D118 D112 C129 C131 L124 L125 RECTIFIER SMOOTING BLOCK D111 C127 L123 C128 RECTIFIER SMOOTING BLOCK D113 C132 R119 CAP VCC D115 D117 DRUM VCC 12V 8V 5 3VA...

Page 30: ...5V CONTROL V IN RF AGC NC ENABLE CLOCK DATA AFT A OUT SIF TU 30V NC V OUT 999 GND 100 AFT 732 TU V OUT 875 MOD A IN 61 MOD CTL 107 5V 26 VCR H 971 MOD VEDIO 71 IIC CLK 72 IIC DATA 781 SIF OUT 1 2 3 4...

Page 31: ...K LPF BD BPF CCD LPF APC ACC DET L DET Main Conv2 Main Conv1 FBC Video ALC PB Mode 28 29 51 49 53 55 46 19 15 17 18 36 40 38 37 23 26 31 14 9 8 11 LINE 2 VIDEO IN LINE 1 VIDEO IN TV VIDEO IN 57 45 73...

Page 32: ...12 74 80 78 A OUT R DVD AUDIO System IC801 LA72670BM IC301 HA118725NF AMP EQ AMP 78 4 10 A OUT R MOD OUT DATA CLOCK R P HEAD N A IN 53 ENA 55 54 5 4 6 From u COM 80 A OUT L 2 OUTPUT SELECTOR EQ 3 2 S...

Page 33: ...B B Hi Fi PB A Hi Fi REC 57 12 74 11 73 9 71 6 4 26 27 80 A OUT L A OUT R 78 3 AUDIO INPUT BLOCK NORMAL AUDIO OUT To AVCP NORMAL AUDIO IN From AVCP SIF DVD A IN L DVD AUDIO DVD A IN R AV1 A IN L AV1 A...

Page 34: ...37760 MODE S1 I Limit MODE S2 MODE S3 MODE S4 T UP Sensor T UP Reel SUP Reel CST IN Vss AMP Vss OSD Vss SYSCON Vcc SYSCON Vcc SERVO CAP PWM CTL CTL CFG CAP REV H LD CTL V ENV V H SW30 DPG D V Sync 38...

Page 35: ...is defective IMPORTANT SAFETY NOTICE WHEN SERVICING THIS CHASSIS UNDER NO CIR CUMSTANCES SHOULD THE ORIGINAL DESIGN BE MODIFIED OR ALTERED WITHOUT PERMISSION FROM THE GO VIDEO ELECTRONICS CORPORA TIO...

Page 36: ...3 34 3 35 2 POWER SMPS CIRCUIT DIAGRAM 2 SR14301A DVW 7000 DVW 7000 Without...

Page 37: ...3 36 3 37 3 TU IF CIRCUIT DIAGRAM SR14305A DVW 7000 PB REC...

Page 38: ...ORM Y REC C REC Y PB Y PB C PB Y C PB C PB Y C REC SR14303A DVW 7000 R333 C350 C349 are defective No Color H SW Level is defective Video Noise L307 C349 are defective No Color C323 is defective Video...

Page 39: ...3 40 3 41 5 Hi Fi CIRCUIT DIAGRAM SR14304A DVW 7000 PB REC DVW 7000 Without 23 Pin is defective Hi Fi Audio is not appear IC801 Pins37 38 aredefective All Audio is not appear...

Page 40: ...3 42 3 43 6 JACK CIRCUIT DIAGRAM DVW 7000 Without DVW 7000 Without SR14306A DVW 7000...

Page 41: ...COM is unstable IC505 is defective VCR will not operate X501 is defective CLOCK SETTING will not operate X502 is defective COM will not operate ES501 ES502 LD501 are defective Auto Rew will not workin...

Page 42: ...501 Pin 90 REC PB DPG DFG DPG DFG IC501 Pin 97 PB CTL OUT IC501 Pin 94 REC WAVEFORMS IC301 Waveform IC301 Pin 9 100mV 10msec DIV VV EE Main De Emphasis out IC301 Pin 12 100mV 10msec DIV PB Main De Emp...

Page 43: ...9 2 52 2 52 5 08 5 17 1 95 5 19 0 5 14 5 19 0 4 7 0 2 54 9 18 2 48 5 19 2 07 0 1 31 0 I C 5 0 4 I C 5 0 5 I C 8 0 1 EE PLAY MODE PIN NO 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 3...

Page 44: ...PRINTED CIRCUIT DIAGRAMS 1 MAIN P C BOARD LOCATION GUIDE 3 50 3 51...

Page 45: ...3 52 3 53 2 MAIN P C BOARD LOCATION GUIDE...

Page 46: ...3 54 3 55 2 POWER P C BOARD LOCATION GUIDE NOTES Warning NOTES Parts that are shaded are critical NOTES With respect to risk of fire or NOTES electricial shock...

Page 47: ...EG STI5589 1 MPEG IC start oscilating 27Mhz after being installed VCC 2 MPEG IC and RF IC get the MRESET signal from VCR front com and they are initialized 3 And then MPEG IC generate SMI_CLK and send...

Page 48: ...fail If WE signal doesn t appear check the VCC and replace the Flash ROM VCC Power Cord in MRESET WE 3 Initializing between MPEG and Flash VCC 3 3V V_REFD 2 1V 9 PIN 10 PIN IC202 DSP STL6317 1 There i...

Page 49: ...oltage 2 LIMIT_SW CD_LD CLOSE_SW FM M D ASSY PMD02 PMD03 IC202 STL6317 IC201 L6560 Let s look over the initial action of M D 1 When the tray is closed CLOSE SW should be changed from 5V to 0V and DSP...

Page 50: ...ing the Video Signal 81 36 DSP RST PC o IC202 DSP IC IC203 MOTOR AMP IC IC601 MPEG Let s look over the initial step of DSP 1 First DSP IC receive the DSP Reset from MPEG 2 This reset signal get DSP in...

Page 51: ...laser on PI CD DVD CD_LD DVD_LD 4 9 Checking the second step of servo 2 DAC_PCMOUT3 DAC_PCM_CLK DAC_SCLK DAC_LRCK Analog audio IC601 MPEG STI5589 AUDIO 2DAC PCM1742 OP AMP Analog Audio Amplified MC458...

Page 52: ...MRESET is abnormal then check the front u com IC501 and replace it MRESET Pin130 of IC601 DSP_RST Pin 81 of IC202 3 3V power input The waveform when power on 11 Checking the reset port Waveforms as b...

Page 53: ...track jump This is the waveform of FE and collector outputs of Q205 and Q206 when to play DVD Section A CD_LD is ON and DVD_LD is OFF Section B DVD_LD is ON and CD_LD is OFF This is the waveform of FE...

Page 54: ...ugh those signals IC201 pin 9 F IC202 pin 28 SPINDLE The waveform F and SPM in the PLAY Mode 15 The status Focus and spindle motor This waveforms are showing The Downloading serve program The must imp...

Page 55: ...eform of clock inputs to IC201 17 Input Clock to IC202 IC202 DSP STL6317 IC201 Driver IC L6560 Pin 38 Pin 39 Pin 1 Pin 2 Tray open LOPEN LCLOSE Tray close MD Pin 4 Pin 5 LM LM DSP send tray open or tr...

Page 56: ...ow for FACT The waveform of FACT F and F 19 Focus Drive signal FACT MRESET signal is output from VCR COM when power is on so IC501 is initialized And those VCR COM and IC501 communicate each other thr...

Page 57: ...IC606 Buffer IC IC601 C642 C641 R600 X601 The waveform and the block diagram as below show a clock input and output between IC601 and X601 Clocks generated in X601 is output and input into pin126 of I...

Page 58: ...r Power Control 3 3V MPEG 1 8 Regulator RF IC Pick up Motor Drive MD Audio ADC DAC Front U com Buffer IC Reset IC Audio OP AMP Motor Drive IC VCR U com VCR U com IC604 74HCT244 Level Shift RF Signal A...

Page 59: ..._ERROR_EN RS_ERROR Frontend Interface sector processor CPRM DVD decryption Memory Interface Diagnostics Controller Micro Processor ST20 MPEG Decoder Sub picture OSD Audio Decoder Video Encoder DAC Aud...

Page 60: ...T3 ADAC_DATA ADAC_CLOCK DAC_RST DAC_SCLK DAC_LRCK DAC_PCM_CLK 2DAC INTERFACE SPDIF DSP_RST IRQ2 IIC_DATA IIC_CLK RS_ECCB_START RS_DATA RS_DVALID RS_BCLK RS_ERROR_EN RS_ERROR PROGRE_L 16 9 D2 T1 D2 T2...

Page 61: ...AUDIO Block Diagram IC401 PCM1742KE AUDIO 2ch DAC L R L R MPEG I F To VCR Hi Fi Jack Block IC402 MC4580 OP AMP LPF Buffer DAC_SCLK DAC_LRCK DAC_PCM_CLK ADAC_CLOCK ADAC_DATA ADAC ENA_2CH DAC_PCMOUT3 DV...

Page 62: ......

Page 63: ...e voltage for pick up Motor drive IC Plup Spindle Loading Motor not work Tray open close RF Amplified Filtered RF Amplified DVD reading fail CD reading fail The final signal for RF Servo DSP IC F E Fi...

Page 64: ...eset Main Servo data and clock 1 8V Regulator Video Buffer IC SDRAM 64M Ligo picture will not display MPEG IC 1 Initial Function 2 Video output 3 Audio output Level shuf IC Initial Function will be ab...

Page 65: ...CUIT DIAGRAM SR14309A DVW 7000 2CH L 2CH R 2Ch Audio digital to Analog convertor OP Amp for Amplifying Audio Siganl Transistor for zero mute Audio mute be send to VCR Serial Interface with main com MP...

Page 66: ...56 1 1 1 11 1 11 1 11 3 2 3 2 3 17 3 21 1 68 0 0 65 0 1 35 0 0 0 0 0 05 0 84 0 66 0 58 0 0 03 1 3 3 22 0 0 0 7 0 55 0 02 1 3 1 66 0 2 5 2 44 3 21 2 42 2 46 0 01 0 01 0 01 0 1 67 0 0 1 6 1 6 0 0 0 09 0...

Page 67: ...0 0 0 0 0 0 0 7 0 6 0 6 0 66 0 794 0 2 39 0 81 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 2 5 0 2 46 0 0 06 0 06 0 0 0 0 0 0 0 0 0 0 7 0 5 0 5 0 8 0 6 0 2 3 0 68 2 45 0 1 8 8 04 4 94 5 03 2 11 1 75 3 22 3 24...

Page 68: ......

Page 69: ...ECHANISM ADJUSTMENT Fixtures and tools for service 4 12 1 Check of Mechanism Assembly Mode 4 13 2 Previous Preparation for Deck Adjustment 4 14 3 Torque Measuring 4 14 4 Adjustment of Guide Roller Hei...

Page 70: ...A 5 T 17 19 Arm T up 1 hook A 5 T 20 Supporter capstan Chassis Hole A 6 B 17 18 21 Belt Capstan Motor Capstan 3 screws A 6 B 22 Lever F R Locking Tab A 6 B 21 22 23 Clutch Assembly D37 Washer A 6 B 24...

Page 71: ...arate cable flat from the Drum FPC and the Capstan Motor 2 Release 3 screws S1 on the bottom side of the chassis and separate the drum assembly 3 Release the hooks H1 H2 and separate both the holder F...

Page 72: ...SEMBLY OF DECK MECHANISM 4 3 B E C Plate Top Arm Assembly F L Gear Assembly Rack F L Opener Door Holder Assembly CST B H3 A B Lever Assembly S W H4 E Fig A 2 Fig A 2 1 Fig A 2 2 Fig A 2 5 Fig A 2 6 Fi...

Page 73: ...Disassembly of Gear Assembly Rack F L Fig A 2 3 1 Separate the hook H3 while leaning ahead the hook 3 after moving the gear assembly rack F L toward the arrow A direction 2 Separate the gear assembly...

Page 74: ...rm Assembly Cleaner Fig A 3 3 1 Separate the A part of Fig A 3 1 from the embossing of chassis and hold it up while turning it anti clockwise 11 Head F E Fig A 3 4 1 Separate the A part of the head F...

Page 75: ...hile holding it upward 14 Arm Assembly Tension Fig A 4 2 1 Release the spring tension the hook H7 from the arm assembly tension 2 After releasing the hook H8 of the base tension sepa rate it while hol...

Page 76: ...e 17 Opener Lid Fig A 5 2 1 Release the B part of the opener lid from the embossing of chassis 2 Disassemble the opener lid upward while turning it anti clockwise 18 Arm Assembly Pinch Fig A 5 3 1 Hol...

Page 77: ...90 deg clockwise with a driver for disassembly 21 Belt Capstan Fig A 6 2 Motor Capstan Fig A 6 3 1 Separate the belt Capstan 2 Undo 3 screws S6 on the bottom side of chassis and dis assemble it upwar...

Page 78: ...r Fig A 7 3 1 Release the hook H11 of the gear sector and then hold the gear sector upward 26 Brake Assembly Capstan Fig A 7 4 1 Release the locking tab L2 on the bottom side of the plate slider and t...

Page 79: ...assem bly P2 and the P3 are adjusted straightly and then corre spond the gear section groove A to the plate slider hole B 32 Base Assembly P2 Fig A 8 3 Base Assembly P3 Fig A 8 4 1 Disassemble the ba...

Page 80: ...se tension from the embossing of chassis 2 Hold the base tension upward while turning it anti clock wise 35 Arm assembly Idler Jog Fig A 9 2 1 Push both B C parts in Fig A 9 2 toward the arrow directi...

Page 81: ...D00 D006 4 Torque gauge adaptor Part No D09 R001 5 Post height adjusting driver Part No DTL 0005 6 Type driver 5 2 Alignment tape Part No NTSC DTN 0001 PAL DTN 0002 3 Torque gauge 600g Cm ATG Part No...

Page 82: ...frame and separate the deck assembly Check both the hole A of gear cam and the hole A of chassis correspond Fig C 1 5 Check the mode S W on the main P C board locates at a proper position as in B of t...

Page 83: ...les on the housing rail part of chassis to prevent detection of the end sensor If doing so proceeding to the stop mode is done In this status input signals of all modes can be received However operati...

Page 84: ...of oscilloscope to the RF envelope output point and the head switching output point 2 Tracking control playback Locate it at the center Set the RF output to the maximum value via the track ing contro...

Page 85: ...he A C head If it is Turn and adjust the tilt adjusting screw to ensure that the tape corresponds to the bottom guide of the P4 and recheck the tape path after pro ceeding play for 4 5 seconds 3 Where...

Page 86: ...n cutting off the REV mode CAUTIONS If the RF waveform is changed after adjusting the A C head perform fine adjustment to ensure the RF waveform is flat tened Adjustment Procedure 1 Connect the probe...

Page 87: ...ELOPE OUTPUT POINT V2 V1 V1 V1 V MAX 0 7 V1 V MAX 0 8 RF ENVELOPE OUTPUT HEAD RF SWITCHING OUTPUT POINT OSCILLOSCOPE Connection Diagram Waveform CH 2 CH 1 Checking Procedure 1 Check that locking time...

Page 88: ...VIEW Fig C 9 2 BOTTOM VIEW F E Head Video Head A C Head Pinch Roller Belt Capston Clutch Assembly A37 Fig C 9 3 Tape Transport System Pollution of Video Head or Tape Transport System Poor Sound Low S...

Page 89: ...C 9 4 Firstly try to use a cleaning tape 1 Use a cleaning patch if foreign materials are not removed with the cleaning tape due to severe dirty of the head Soak the cleaning patch in alcohol and put...

Page 90: ...Part PL 433 Yellow Gear Part PL 433 Yellow Boss Part Side Wall PL 433 Yellow Gear Part Side Application PL 433 Yellow Cam Part Side Application KG 684G Green Gear Sector Gear Cam Base Loading Gear Dri...

Page 91: ...PROTECTION MAINTENANCE AND CHECK OF VIDEO FUNCTION 4 22 Lever F R Base Tension GEAR AY P2 P3 LEVER F R Clutch Contact Part PL 433 Yellow Tension Arm Party Hinge Part PL 433 Yellow BASE TENSION PL 433...

Page 92: ...yscon checked NO YES YES YES YES NO NO 1 Deck Mechanism A NO NO NO No F R operates Is the current mode an F R mode Check the assembly position of the Mode S W Is normal voltage applied at the Vcc1 and...

Page 93: ...the spring pinch Replace the drum motor Check the Servo Syscon Check the Syscon com No cassette loading is done Insert the cassette Check the holder assembly CST Does output of the CST IN S W change...

Page 94: ...ck the Syscon circuit Check the Syscon circuit Check the Syscon circuit Does the Capstan motor turn Is the Vctl terminal voltage of the drum motor at more than 2 3V Replace the drum motor Is the Vcc v...

Page 95: ...ly YES Is there short between the cassette switch terminal and the GND on the main P C B assembly Replace the main P C B assem bly or remove the short part NO Check the mode switch position and the Sy...

Page 96: ...mbly F L Check power supply of the L D motor Check the assembly status of the holder assembly cassette Replace the gear rack F L Does the gear rack F L operate Does the opener door operate Does the ar...

Page 97: ...4 28 EXPLODED VIEWS 100 A21 A23 A24 032 109 A22 054A 054 115 116 110 112 113 114 103 105 102 106 107 1 Front Loading Mechanism Section...

Page 98: ...EXPLODED VIEWS 4 29 008 011 031 079 017 032 024 406 031 021 028 029 026 A03 027 022 003 004 006 007 014 015 009 409 013 016 012 OPTIONAL PART A01 405 2 Moving Mechanism Section 1...

Page 99: ...EXPLODED VIEWS 4 30 052 517 061 056 518 052A 055 410 032 077 076 078 060 051 064 A11 A12 067 066 065 068 069 070 023 080 058 3 Moving Mechanism Section 2...

Page 100: ......

Page 101: ...2 1 1 3 Clamp Upper 5 2 2 Tray Disc 5 2 3 Base Assembly Sled 5 3 3 1 Gear Assembly Feed 5 3 3 2 Gear Assembly Middle 5 3 3 3 Gear Assembly Rack 5 3 4 Rubber Rear 5 3 5 Frame Assembly Up Down 5 4 6 Be...

Page 102: ...Up Down Belt Loading Gear Pulley Gear Loading Guide Up Down PWB Assembly Loading Base Main 2 Screws 2 Locking Tabs 4 Screws 1 Connector 1 Locking Tabs 1 Screw 1 Screw 1 Locking Tab 1 Locking Tab 1 Loc...

Page 103: ...amp Assembly Disc from the Holder Clamp 1 1 1 Plate Clamp 1 Turn the Plate Clamp to counterclockwise direction and then lift up the Plate Clamp 1 1 2 Magnet Clamp 1 1 3 Clamp Upper 2 Tray Disc Fig 5 2...

Page 104: ...ISM DISASSEMBLY 3 Base Assembly Sled Fig 5 3 1 Release 4 Screw S2 2 Disconnect the FFC Connector C1 3 1 Gear Assembly Feed 3 2 Gear Middle 3 3 Gear Assembly Rack 1 Release the Scerw S3 4 Rubber Rear F...

Page 105: ...ck the Locking Tab L4 in direction of arrow B and then separate the Gear Pulley from the Base Main 8 Gear Loading Fig 5 4 9 Guide Up Down Fig 5 4 1 Move the Guide Up Down in direction of arrow A as Fi...

Page 106: ......

Page 107: ...Exploded View 429 429 026 010 018 013 014 017 015 015A 011 430 431 011A 012 004 001 002 003 A01 A02 020 430 430 430 430 012 021 433 433 012 012 028 022 432 024 A03 A26 025 030 015B 015C 435 029 031 43...

Page 108: ......

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