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Zenith ZH-T202SF Series Service Manual

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SERVICE MANUAL
Product Type: DVD HOME THEATER SYSTEM
Chassis: DP10-T
Manual Series: ZH-T202SF
Manual Part #: AFN32633706
Model Line: C
Product Year: 2007
CONTENTS
..................................................
GENERAL
..............................................
AUDIO PART
......................................
DVD & AMP PART
...................................
EXPLODED VIEWS
........................................
SPEAKER PART
REPLACEMENT PARTS LIST
Published January 2007
by Technical Publications
Zenith Electronics Corporation
201 James Record Road
Huntsville, Alabama 35824-1513
Copyright © 2007 by Zenith Electronics Corporation
Printed in CANADA
Model Series:
ZH-T202SF
1
2
3
4
5
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6

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  • Page 1 DVD & AMP PART ........EXPLODED VIEWS ........SPEAKER PART ....REPLACEMENT PARTS LIST Published January 2007 by Technical Publications Zenith Electronics Corporation 201 James Record Road Huntsville, Alabama 35824-1513 Copyright © 2007 by Zenith Electronics Corporation Printed in CANADA...

  • Page 2: Table Of Contents

    [CONTENTS] ❍ SECTION 1. GENERAL • SERVICING PRECAUTIONS ..........1-2 •...

  • Page 3: Servicing Precautions

    SECTION 1. GENERAL SERVICING PRECAUTIONS NOTES REGARDING HANDLING OF THE PICK-UP 1. Notes for transport and storage 1) The pick-up should always be left in its conductive bag until immediately prior to use. 2) The pick-up should never be subjected to external pressure or impact. Storage in conductive bag Drop impact 2.
  • Page 4 NOTES REGARDING COMPACT DISC PLAYER REPAIRS 1. Preparations 1) Compact disc players incorporate a great many ICs as well as the pick-up (laser diode). These components are sensitive to, and easily affected by, static electricity. If such static electricity is high voltage, components can be damaged, and for that reason components should be handled with care.

  • Page 5: Esd Precautions

    ESD PRECAUTIONS Electrostatically Sensitive Devices (ESD) Some semiconductor (solid state) devices can be damaged easily by static electricity. Such components commonly are called Electrostatically Sensitive Devices (ESD). Examples of typical ESD devices are integrated circuits and some field-effect transistors and semiconductor chip components. The following techniques should be used to help reduce the incidence of component damage caused by static electricity.

  • Page 6: Service Information For Eeprom

    SERVICE INFORMATION FOR EEPROM (DVD PART) POWER ON DETECT NEW EEPROM DVD LOGO Status (NO Disk status) (OPTION EDIT SCREEN) NAME OPT 1 Remote control OPT 2 Pause key-->1-->4-->7-->2 in order. OPT 3 OPT 4 OPT 5 OPT 6 Press number 0~9, Press charater OPT 7 A~F (1~6 for a while) OPT 8...
  • Page 7 SERVICE INFORMATION FOR EEPROM (AMP PART) POWER ON FLD no disc status Remote control ‘2’ + Front ‘STOP’ DETECT NEW EEPROM push same timing during 5s (OPTION EDIT SCREEN) NAME OPT 1 OPT 2 FLD ‘OP-0…. OPT 3 OPT 4 OPT 5 Use arrow key ( ) move...

  • Page 8: Specifications

    SPECIFICATIONS GENERAL Power supply Refer to main label Power consumption Refer to main label Net Weight 2.4 kg External dimensions (W x H x D) 360 x 63 x 307 mm Operating conditions Temperature: 5°C to 35°C, Operation status: Horizontal Operating humidity 5% to 85% CD/DVD...

  • Page 10: Audio Troubleshooting Guide

    SECTION 2. AUDIO PART AUDIO TROUBLESHOOTING GUIDE 1. Power Supply Circuit Insert power cord. Check power plug and power Does red power led supply circuit. turn on? Turn power on. Check power supply circuit. Is power on? Does red power led Check laser circuit.
  • Page 11 2. Front circuit (1/2) Power on. Check if Reconnect it.(Refer to notice *1) Red LED turn off? PN1301 is ok? Check if the front Is the Digitron on Refer to SMPS part. power is ok?(*2) correctly? Check if all buttons are ok? Check if Check if the remote Check pattern and resoldering...
  • Page 12 3. Front circuit (2/2) Check if the Refer to power(SMPS). power part of the front is ok? Check if R345~R350 Refer to Replace R345 ~ R350. MICOM circuit. Check if the power Refer to power(SMPS). part of the front is ok? Check if the remote Refer to MICOM circuit.

  • Page 14: Wiring Diagram

    WIRING DIAGRAM 061026...

  • Page 15: Block Diagram

    BLOCK DIAGRAM 061026...

  • Page 16: Circuit Diagrams

    MODIFIED OR ALTERED WITHOUT PERMISSION IMPLEMENTATION OF THE LATEST SAFETY AND during Play mode. FROM THE ZENITH. ALL COMPONENTS SHOULD PERFORMANCE IMPROVEMENT CHANGES INTO BE REPLACED ONLY WITH TYPES IDENTICAL TO THE SET IS NOT DELAYED UNTIL THE NEW SERVICE THOSE IN THE ORIGINAL CIR- CUIT.
  • Page 17 2. µ-COM(MAIN) CIRCUIT DIAGRAM 061026 2-10 2-11...
  • Page 18 3. MOTOR & SERVO CIRCUIT DIAGRAM 061026 2-12 2-13...
  • Page 19 4. I/O CIRCUIT DIAGRAM 061026 2-14 2-15...
  • Page 20 5. MIC CIRCUIT DIAGRAM 061026 2-16 2-17...
  • Page 21 6. FRONT JACK CIRCUIT DIAGRAM 070102 2-18 2-19...
  • Page 22 7. FRONT CIRCUIT DIAGRAM 061026 2-20 2-21...
  • Page 23 PRINTED CIRCUIT BOARD DIAGRAMS 1. MAIN P.C. BOARD DIAGRAM ( TOP VIEW ) 2-22 2-23...
  • Page 24 2. MAIN P.C. BOARD DIAGRAM ( BOTTOM VIEW ) 2-24 2-25...
  • Page 25 3. SMPS P.C. BOARD NOTE: Warning Parts that are shaded are critical with respect to risk of fire or electrical shock. 2-26 2-27...
  • Page 26 4. FRONT JACK P.C BOARD 5. FRONT P.C.BOARD 2-28 2-29...

  • Page 28: Electrical Troubleshooting Guide

    SECTION 3. DVD & AMP PART ELECTRICAL TROUBLESHOOTING GUIDE 1. System operation flow POWER ON. 1. Initializes SERVO, DSP & RISC registers. 2. Write RISC code to SDRAM. 3. Reset RISC. Show LOGO. Tray closed? Tray close to closed position. SLED at inner side? SLED moves to inner position.
  • Page 29 2. Test & debug flow TEST. Check the AC voltage Check the POWER PART. Power PCBA (110V or 220V). Switch on the Power PCBA. Are the DC Voltage outputs OK? (12V, 5.6V, Check the POWER PART. 3.5V, 5V,7V, 34V). Are 3.5V and 5V DC Check the regulators or diode.
  • Page 30 Power On. Flash Check connection lines between FLASH & Show LOGO? Memory operates ES8380 and the FLASH access time whether properly? is suitable or not. Check connection lines between SDRAM SDRAM(IC502) & ES8380 and the SDRAM is works properly? damaged. ES8380 Check the related circuit of ES8380 VIDEO outputs...
  • Page 31 Does the SLED Motor Check the connection line of move to inner side when it is Driver DRV_MUTE DRV_MUTE. at outer position? pin is high? Motor Driver DRV_MUTE Check the related circuit of SLEGN. pin is High? SLED+ and SLED- output Check the amp circuit on motor driver.
  • Page 32 Check the laser power circuit on DVDLD or Laser turns on when CDLD output ES8380 and connecting to reading disc? power transistor.(Q405, Q406). property? Collector voltage of power Check the related circuit on laser transistor is OK? power transistor. (Q405, Q406) Check cable connection between transistor output and pick-up head.
  • Page 33 Proper Check connections between Focus on ok? signals on A, B, C, ES8380 and pick-up head. D of ES8380. Proper Check the related circuit on CD-DVDCT signal ES8380 CD-DVDCT. on ES8380. Check CD_DVDCT connection between IP9009 and ES8380. Proper Check the related circuit on CD-DVDCT signal Track On OK? ES8380.
  • Page 34 Normal Audio PWM IC Check connection between output when disc received correct data IC701 BCK, LRCK, ADATAO. playback? stream? Normal Check the related circuit of PWM IC out?(IC701). PWM.(Check Audio out Pins 54, 55, 58, 59, 61, 62, 67, 68, 70, 71, 74, 75. Check Digital Amp circuit (IC702, IC703).
  • Page 35 3. AUDIO µ-COM Circuit(DVD & AMP) POWER ON. Does CD/DVD appear Does AUX, SCART, OPT at FLD? and FM 87.5 appear at FLD. Does Loading appear Does it appear DVD Error at FLD? at FLD? Does no Disc or Time Check power part of Main Refer to SMPS.

  • Page 36: Details And Waveforms On System Test And Debugging

    DETAILS AND WAVEFORMS ON SYSTEM TEST AND DEBUGGING 1. SYSTEM 27MHz CLOCK,RESET,FLASH R/W SIGNAL 1) ES8380 main clock is at 27MHz(X501) 3.8V, 27MHz FIG 1-1 2) ES8380 reset is high active. Power Cord in 5.2VA PWR_CTL(SYSTEM µ-COM) (IC101 PIN2) DVD_RESET(IC101 PIN 41) MRST#(IC501 PIN 203) FIG 1-2...
  • Page 37 3) Flash R/W enable signal during download(Downloading) FRD(IC503 PIN 28) FWR(IC503 PIN 11) FIG 1-4 2. SDRAM CLOCK 1) ES8380 main clock is at 27MHz(X501) DCLK = 93MHz, Vp-p=2.2, Vmax=2.7V (IC502 PIN 38) FIG 2-1 3-10...
  • Page 38 3. TRAY OPEN/CLOSE SIGNAL 1) Tray open/close waveform OPENSW(P401 PIN3) CLOSESW(P401 PIN4) OPEN(IC401 PIN 1) CLOSE(IC401 PIN 2) FIG 3-1 2) Tray close waveform OPENSW(P401 PIN3) CLOSESW(P401 PIN4) OPEN(IC401 PIN 1) CLOSE(IC401 PIN 2) FIG 3-2 3-11...
  • Page 39 3) Tray open waveform OPENSW(P401 PIN3) CLOSESW(P401 PIN4) OPEN(IC401 PIN 1) CLOSE(IC401 PIN 2) FIG 3-3 4. SLED CONTROL RELATED SIGNAL (NO DISC CONDITION) SLO(2.0V/1.4V/1.0V) (IC501 PIN 173) DRV_MUTE(5V) – (IC401 PIN 21) SLED+(4.7V/3.6V/1.9V) (IC401 PIN 17) SLED-(5.3V/3.7V/2.5V) (IC401 PIN 18) FIG 4-1 3-12...
  • Page 40 5. LENS CONTROL RELATED SIGNAL(NO DISC CONDITION) FOO(1.5V/1.4V/1.3V) (IC501 PIN 172) F+(4.0V/3.6V/3.2V) (IC401 PIN 13) F-(4.0V/3.6V/3.2V) (IC401 PIN 14) FIG 5-1 6. LASER POWER CONTROL RELATED SIGNAL(NO DISC CONDITION) DVD MDI(0V/180mV) (IC501 PIN 152) DVDLDO501(5.0V//3.5V) (IC501 PIN 149) CDLDO(5.0V/3.6V) (IC501 PIN 150) FIG 6-1 3-13...

  • Page 41: Disc Type Judgement Waveforms

    7. DISC TYPE JUDGEMENT WAVEFORMS F+(IC401 PIN 13) CD_DVDCT(IC501 PIN 133) RF(IC501 PIN 160) FIG 7-1 (DVD) F+(IC401 PIN 13) CD_DVDCT(IC501 PIN 133) RF(IC501 PIN 160) FIG 7-2 (DVD) 3-14...
  • Page 42 F+(IC401 PIN 13) CD_DVDCT(IC501 PIN 133) RF(IC501 PIN 160) FIG 7-3 (CD) F+(IC401 PIN 13) CD_DVDCT(IC501 PIN 133) RF(IC501 PIN 160) FIG 7-4 (CD) 3-15...

  • Page 43: Focus On Waveforms

    8. FOCUS ON WAVEFORMS CD_DVDCT(IC501 PIN 133) FOO(IC501 PIN172) F+(IC401 PIN 13) F-(IC401 PIN 14) FIG 8-1 (DVD) CD_DVDCT(IC501 PIN 133) FOO(IC501 PIN172) F+(IC401 PIN 13) F-(IC401 PIN 14) FIG 8-2 (CD) 3-16...
  • Page 44 9. SPINDLE CONTROL WAVEFORMS (NO DISC CONDITION) SPINO(1.4V/1.8V) (IC501 PIN 171) SP-(3.6V/2.4V) (IC501 PIN 156) SP+(3.6V/4.8V) (IC501 PIN 155) FIG 9-1 10. TRACKING CONTROL RELATED SIGNAL(System checking) CD_DVDCT(IC501 PIN 133) TRO(IC501 PIN 174) TR-(IC401 PIN 12) TR+(IC401 PIN 11) FIG 10-1(DVD) 3-17...
  • Page 45 CD_DVDCT(IC501 PIN 133) TRO(IC501 PIN 174) TR-(IC401 PIN 12) TR+(IC401 PIN 11) FIG 10-2(CD) 11. ES8380 VIDEO OUTPUT WAVEFORMS 1) Full colorbar signal(COMPOSIT) (IC501 PIN 110) FIG 11-1 3-18...
  • Page 46 2) Y (IC501 PIN 113) FIG 11-2 12. AUDIO OUTPUT FROM PWM IC 1) Audio L/R (IC701 PIN 1, 7) FIG 12-1 3-19...
  • Page 47 2) Audio related Signal ASDATA3 ADATA0(IC501 PIN 118) BCK(IC501 PIN 124) LRCK(IC501 PIN 117) FIG 12-2 3-20...
  • Page 48 13. DVD & AMP WAVEFORMS • R620 → TP611 • R618 → TP609 R621 TP612 R619 TP610 • R612 → TP603 • R610 → TP601 R613 TP604 R611 TP602 • R614 → TP605 • R616 → TP607 R615 TP606 R617 TP608 3-21...

  • Page 50: Dvd & Amp Circuit Diagrams

    DVD & AMP CIRCUIT DIAGRAM 1. MPEG CIRCUIT DIAGRAM 061026 3-23 3-24...
  • Page 51 2. DSP & AMP CIRCUIT DIAGRAM 061026 3-25 3-26...

  • Page 52: Section 4. Exploded Views

    SECTION 4. EXPLODED VIEWS • CABINET AND MAIN FRAME SECTION NOTES) THE EXCLAMATION POINT WITHIN AN EQUILATERAL TRIANGLE IS INTENDED TO ALERT THE SERVICE PERSONNEL TO THE PRESENCE OF IMPORTANT SAFETY INFORMATION IN SERVICE LITERATURE. OPTIONAL PART P3502 MAIN CABLE1 SMPS...
  • Page 53 • DECK MECHANISM EXPLODED VIEW(DP-10T) 015B 015A 012A 012A...
  • Page 54 • PACKING ACCESSORY SECTION 811 RCA CABLE VIDEO(1WAY) 824 ANTENNA LOOP(AM) BATTERY 825 ANTENNA (FM) INSTRUCTION ASSEMBLY REMOCON PACKING, CASING PACKING, CASING...
  • Page 55 SECTION 5. SPEAKER SECTION • FRONT/CENTER/REAR SPEAKER (SH22SF-SY) OPTIONAL PART F.R SPK F.L SPK CENTER SPK R.R SPK R.L SPK WIRE80 F.R SPK WIRE81 F.L SPK WIRE82 CENTER SPK WIRE83 R.R SPK FRONT/CENTER SPK WIRE84 R.L SPK 851S REAR SPK...
  • Page 56 4. LHS-96SB • PASSIVE SUBWOOFER SPEAKER (SH22SF-WY) WIRE90...

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