SERVICE MANUAL SERVICE MANUAL MODEL : ZH-T202SF Product Type: DVD HOME THEATER SYSTEM Chassis: DP10-T Manual Series: ZH-T202SF Manual Part #: AFN32633706 Model Line: C Product Year: 2007 CONTENTS GENERAL .................................................. 1 AUDIO PART .............................................. 2 DVD & AMP PART...................................... 3 EXPLODED VIEWS ................................... 4 SPEAKER PART ........................................ 5 REPLACEMENT PARTS LIST .....
[CONTENTS] ❍ SECTION 1. GENERAL • SERVICING PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2 • ESD PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4 • SERVICE INFORMATION FOR EEPROM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5 • SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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. Repair notes 1) The pick-up incorporates a strong magnet, and so should never be brought close to magnetic materials.
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. 2) The pick-up is composed of many optical components and other high-precision components.
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. 1.
SERVICE INFORMATION FOR EEPROM (DVD PART) POWER ON DVD LOGO Status (NO Disk status) DETECT NEW EEPROM (OPTION EDIT SCREEN) NAME Remote control Pause key-->1-->4-->7-->2 in order. Press number 0~9, Press charater A~F (1~6 for a while) Use arrow key ( ) to move to appropriate position and make changes OPT OPT OPT OPT OPT OPT OPT OPT OPT OPT OPT OPT OPT OPT OPT OPT 1 2 3 4 5 6 7 8 9 A B C D E F G Press pause key once Change will be applied when power OFF-->ON.
SERVICE INFORMATION FOR EEPROM (AMP PART) POWER ON FLD no disc status Remote control ‘2’ + Front ‘STOP’ push same timing during 5s FLD ‘OP-0….
SPECIFICATIONS GENERAL Power supply Power consumption Net Weight External dimensions (W x H x D) Operating conditions Operating humidity Refer to main label Refer to main label 2.
SECTION 2. AUDIO PART AUDIO TROUBLESHOOTING GUIDE 1. Power Supply Circuit Insert power cord. Yes Does red power led turn on? No Check power plug and power supply circuit. Yes Turn power on. No Check power supply circuit. Is power on? Yes Does red power led turn on? No Check laser circuit. Check focus circuit. Yes Check disc. No Check tracking servo circuit. Does it play? Yes Does it output audio? No Check audio circuit.
2. Front circuit (1/2) Power on. No Check if PN1301 is ok? Red LED turn off? Yes Is the Digitron on correctly? No Reconnect it.(Refer to notice *1) Yes No Check if the front power is ok?(*2) Yes No Refer to SMPS part. Yes Check if all buttons are ok? 1 Yes Check if the remote control is ok? No 2 Check if RM301 is ok? Yes Front B/D ok.
3. Front circuit (2/2) 1 Check if the power part of the front is ok? No Refer to power(SMPS). Yes Check if R345~R350 ok? No Yes Refer to MICOM circuit. Replace R345 ~ R350. 2 Check if the power part of the front is ok? No Refer to power(SMPS). Yes Check if the remote control waveform of PN3101 pin11 is ok? Yes Refer to MICOM circuit. No Check if RM301 voltage is ok(5V)? No Yes Resolder or Replace RM301.
WIRING DIAGRAM 061026 2-4 2-5
BLOCK DIAGRAM 061026 2-6 2-7
CIRCUIT DIAGRAMS IMPORTANT SAFETY NOTICE 1. SMPS(POWER) CIRCUIT DIAGRAM NOTE) NOTE) NOTE) NOTE) WHEN SERVICING THIS CHASSIS, UNDER NO CIRCUMSTANCES SHOULD THE ORIGINAL DESIGN BE MODIFIED OR ALTERED WITHOUT PERMISSION FROM THE ZENITH. ALL COMPONENTS SHOULD BE REPLACED ONLY WITH TYPES IDENTICAL TO THOSE IN THE ORIGINAL CIR- CUIT. SPECIAL COMPONENTS ARE SHADED ON THE NOTE : SCHEMATIC FOR EASY IDENTIFICATION. 1. Shaded( ) parts are critical for safety.
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PRINTED CIRCUIT BOARD DIAGRAMS 1. MAIN P.C.
2. MAIN P.C.
3. SMPS P.C. BOARD NOTE: Warning Parts that are shaded are critical with respect to risk of fire or electrical shock.
4. FRONT JACK P.C BOARD 5. FRONT P.C.
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. Yes Tray closed? No Tray close to closed position. SLED at inner side? Yes No SLED moves to inner position. 1. Judge whether have disc and disc type. 2. Jump to related disc reading procedure. Recieve OPEN/ CLOSE Key? No 1. Execute Pressed Key & IR Key. 2. System operation routine loop. 1.
2. Test & debug flow TEST. Check the AC voltage Power PCBA (110V or 220V). No Check the POWER PART. Yes Switch on the Power PCBA. Are the DC Voltage outputs OK? (12V, 5.6V, 3.5V, 5V,7V, 34V). No Check the POWER PART. Yes Are 3.5V and 5V DC outputs normal on main PCBA? No Check the regulators or diode. Yes Update FLASH successfully? No 1. Check 2. Check 3. Check 4. Check 27MHz system clock. system reset circuit. FLASH R/W enable signal PRD, RWR. FLASH Memory related circuit.
A Power On. Show LOGO? Flash Memory operates properly? Check connection lines between FLASH & ES8380 and the FLASH access time whether is suitable or not. Check connection lines between SDRAM(IC502) & ES8380 and the SDRAM is damaged. SDRAM works properly? ES8380 VIDEO outputs properly? Check the related circuit of ES8380 IC501 Pins133, 134, 137, 138, 139, 140. Check AV cable connection to TV set.
B Does the SLED move to inner side when it is at outer position? No Motor Driver DRV_MUTE pin is high? No Check the connection line of DRV_MUTE. Yes Yes Motor Driver DRV_MUTE pin is High? No Check the related circuit of SLEGN. Yes SLED+ and SLED- output properly? No Check the amp circuit on motor driver. Yes Do not put in disc and close tray. Optical Lens has movements for searching Focus? Check the cable connection with MECHA.
C Laser turns on when reading disc? No DVDLD or CDLD output property? No Check the laser power circuit on ES8380 and connecting to power transistor.(Q405, Q406). No Check the related circuit on laser power transistor. No Check the related circuit on ES8380 RF signal. No Check the SPINDLE related circuit on ES8380. No Check the spindle control amp circuit of motor driver.
D Focus on ok? No Proper signals on A, B, C, D of ES8380. No Check connections between ES8380 and pick-up head. Yes Yes Proper CD-DVDCT signal on ES8380. No Check the related circuit on ES8380 CD-DVDCT. No Check the related circuit on ES8380. No Check the TRACK connection on ES8380 and motor driver. No Check the tracking control amp circuit on motor driver. Yes Check CD_DVDCT connection between IP9009 and ES8380. Proper CD-DVDCT signal on ES8380.
E Normal Audio output when disc playback? PWM IC received correct data stream? Check connection between IC701 BCK, LRCK, ADATAO. Normal PWM IC out?(IC701). Check the related circuit of PWM.(Check Audio out Pins 54, 55, 58, 59, 61, 62, 67, 68, 70, 71, 74, 75. Check Digital Amp circuit (IC702, IC703). TEST END.
3. AUDIO µ-COM Circuit(DVD & AMP) POWER ON. Does CD/DVD appear at FLD? NO Does AUX, SCART, OPT and FM 87.5 appear at FLD. YES Does Loading appear at FLD? NO NO YES Does no Disc or Time appear at FLD? NO Check power part of Main B/D. NO Refer to SMPS. YES NO Check if DVD an audio micom insert is OK. Check oscillator of X101. YES Refer to oscillator circuit. YES NO YES NO YES YES Check Power. Does it appear DVD Error at FLD? NO Check if IC101 Pin41 is high. Check IC101 reset waveform.
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.
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.
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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.
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.
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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
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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.
CD_DVDCT(IC501 PIN 133) TRO(IC501 PIN 174) TR-(IC401 PIN 12) TR+(IC401 PIN 11) FIG 10-2(CD) 11.
2) Y (IC501 PIN 113) FIG 11-2 12.
2) Audio related Signal ASDATA3 ADATA0(IC501 PIN 118) BCK(IC501 PIN 124) LRCK(IC501 PIN 117) FIG 12-2 3-20
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DVD & AMP CIRCUIT DIAGRAM 1.
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SECTION 4. EXPLODED VIEWS • CABINET AND MAIN FRAME SECTION 463 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.
• DECK MECHANISM EXPLODED VIEW(DP-10T) 001 002 003 A26 439 018 A01 014 A02 013 020 017 012 435 015B 015 015A 019 016 440 432 012 030 012A 010 026 439 024 025 431 036 435 012A A03 021 430 4-3 4-4
• PACKING ACCESSORY SECTION 811 824 ANTENNA LOOP(AM) RCA CABLE VIDEO(1WAY) 808 BATTERY 825 ANTENNA (FM) 801 INSTRUCTION ASSEMBLY 900 REMOCON 804 BAG 803 PACKING, CASING 803 PACKING, CASING 802 BOX 4-5
SECTION 5. SPEAKER SECTION • FRONT/CENTER/REAR SPEAKER (SH22SF-SY) OPTIONAL PART A80 A81 F.R SPK F.L SPK A82 CENTER SPK A83 R.R SPK A84 R.L SPK 852 WIRE80 F.R SPK 850 WIRE81 F.L SPK WIRE82 CENTER SPK WIRE83 R.R SPK FRONT/CENTER SPK 851 WIRE84 R.
4.
