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2-1

SECTION 2. AUDIO PART

AUDIO TROUBLESHOOTING GUIDE

1. Power Supply Circuit

Insert power cord.

Check power plug and power

supply circuit.

Turn power on.

Yes

Does red power led

turn on?

Check power supply circuit.

Is power on?

Check tracking servo circuit.

Does it play?

Check audio circuit.

Does it output

audio?

Check laser circuit.

Check focus circuit.

Check disc.

Does red power led

turn on?

Содержание ZH-T202SF Series

Страница 1: ...AL 1 AUDIO PART 2 DVD AMP PART 3 EXPLODED VIEWS 4 SPEAKER PART 5 REPLACEMENT PARTS LIST 6 Published January 2007 by Technical Publications Zenith Electronics Corporation 201 James Record Road Huntsvil...

Страница 2: ...1 7 SECTION 2 AUDIO PART AUDIO TROUBLESHOOTING GUIDE 2 1 WIRING DIAGRAM 2 4 BLOCK DIAGRAM 2 6 CIRCUIT DIAGRAMS 2 8 PRINTED CIRCUIT DIARGAMS 2 22 SECTION 3 DVD AMP PART ELECTRICAL TROUBLESHOOTING GUIDE...

Страница 3: ...beams may damage the eyes Absolutely never permit laser beams to enter the eyes Also NEVER switch ON the power to the laser output part lens etc of the pick up if it is damaged 5 Cleaning the lens sur...

Страница 4: ...replacing a component part first disconnect the power supply lead wire from the unit 2 All equipment measuring instruments and tools must be grounded 3 The workbench should be covered with a conducti...

Страница 5: ...rges sufficient to damage ESD devices 5 Do not use freon propelled chemicals These can generate electrical charges sufficient to damage ESD devices 6 Do not remove a replacement ESD device from its pr...

Страница 6: ...ss charater A F 1 6 for a while Use arrow key to move to appropriate position and make changes Press pause key once Change will be applied when power OFF ON NAME OPT 1 OPT 2 OPT 3 OPT 4 OPT 5 OPT 6 OP...

Страница 7: ...timing during 5s FLD OP 0 Use arrow key move to appropriate position and make changes Press ENTER key once FLD write ok or up ok Remote control 2 Front STOP push same timing FLD display E2P CLR or EP...

Страница 8: ...ing Range 87 5 108 0 MHz or 65 0 74 0 MHz 87 5 108 0 MHz Intermediate Frequency 10 7 MHz Signal to Noise Ratio 60 dB Mono Frequency Response 160 10 000 Hz AM MW Tuning Range 522 1 620 kHz or 520 1 720...

Страница 9: ......

Страница 10: ...g and power supply circuit Turn power on OK No Yes Yes Yes Yes Yes Yes No No No No Does red power led turn on Check power supply circuit Is power on Check tracking servo circuit Does it play Check aud...

Страница 11: ...S part Check pattern and resoldering Front B D ok Red LED turn off Check if PN1301 is ok Is the Digitron on correctly Check if the front power is ok 2 Check if all buttons are ok Check if the remote c...

Страница 12: ...R350 ok Refer to power SMPS No Replace R345 R350 No Yes Yes 1 Resolder or Replace RM301 Check if the power part of the front is ok Check if the remote control waveform of PN3101 pin11 is ok Check if R...

Страница 13: ......

Страница 14: ...2 4 2 5 WIRING DIAGRAM 061026...

Страница 15: ...2 6 2 7 BLOCK DIAGRAM 061026...

Страница 16: ...FER FROM THE ACTUAL CIRCUIT USED THIS WAY IMPLEMENTATION OF THE LATEST SAFETY AND PERFORMANCE IMPROVEMENT CHANGES INTO THE SET IS NOT DELAYED UNTIL THE NEW SERVICE LITERATURE IS PRINTED NOTE 1 Shaded...

Страница 17: ...2 10 2 11 2 COM MAIN CIRCUIT DIAGRAM 061026...

Страница 18: ...2 12 2 13 3 MOTOR SERVO CIRCUIT DIAGRAM 061026...

Страница 19: ...2 14 2 15 4 I O CIRCUIT DIAGRAM 061026...

Страница 20: ...2 16 2 17 5 MIC CIRCUIT DIAGRAM 061026...

Страница 21: ...2 18 2 19 6 FRONT JACK CIRCUIT DIAGRAM 070102...

Страница 22: ...2 20 2 21 7 FRONT CIRCUIT DIAGRAM 061026...

Страница 23: ...2 22 2 23 PRINTED CIRCUIT BOARD DIAGRAMS 1 MAIN P C BOARD DIAGRAM TOP VIEW...

Страница 24: ...2 24 2 25 2 MAIN P C BOARD DIAGRAM BOTTOM VIEW...

Страница 25: ...2 26 2 27 3 SMPS P C BOARD NOTE Warning Parts that are shaded are critical with respect to risk of fire or electrical shock...

Страница 26: ...2 28 2 29 4 FRONT JACK P C BOARD 5 FRONT P C BOARD...

Страница 27: ......

Страница 28: ...OGO Yes Yes Yes No No No No Tray close to closed position SLED moves to inner position 1 Judge whether have disc and disc type 2 Jump to related disc reading procedure 1 Execute Pressed Key IR Key 2 S...

Страница 29: ...e regulators or diode No 1 Check 27MHz system clock 2 Check system reset circuit 3 Check FLASH R W enable signal PRD RWR 4 Check FLASH Memory related circuit Check the AC voltage Power PCBA 110V or 22...

Страница 30: ...8380 IC501 Pins133 134 137 138 139 140 Check the load OPEN CLOSE switch Check the Tray control IO pins on ES8380 Check the Tray control MOTOR SERVO circuit IC401 Show LOGO Does Tray move inside when i...

Страница 31: ...of DRV_MUTE Check the related circuit of SLEGN Check the amp circuit on motor driver Motor Driver DRV_MUTE pin is high Motor Driver DRV_MUTE pin is High SLED and SLED output properly Check cable conn...

Страница 32: ...ndle control amp circuit of motor driver Laser off Check the RF connection between IP9009 and ES8380 Check the cable connection between spindle and main PCB Check cable connection between transistor o...

Страница 33: ...uit on motor driver Check the related circuit on ES8380 Check cable connection on pick up head Check RF signal waveform Check CD_DVDCT connection between IP9009 and ES8380 Proper signals on A B C D of...

Страница 34: ...Check connection between IC701 BCK LRCK ADATAO 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 PWM IC received correct...

Страница 35: ...ppear DVD Error at FLD Refer to SMPS Refer to oscillator circuit Check IC101 reset waveform Check 3 3V line Check power section circuit NO Check power part of Main B D Check oscillator of X101 Check i...

Страница 36: ...ND 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 PWR_CTL SYSTEM COM IC101 PIN2 5 2VA Power Cord in DVD_RES...

Страница 37: ...10 2 SDRAM CLOCK 1 ES8380 main clock is at 27MHz X501 IC502 PIN 38 DCLK 93MHz Vp p 2 2 Vmax 2 7V FIG 2 1 3 Flash R W enable signal during download Downloading FRD IC503 PIN 28 FWR IC503 PIN 11 FIG 1...

Страница 38: ...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 IC...

Страница 39: ...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 Tray open waveform OPENSW P401 PIN3 CLOSESW P401 PIN4 O...

Страница 40: ...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...

Страница 41: ...3 14 F IC401 PIN 13 CD_DVDCT IC501 PIN 133 RF IC501 PIN 160 FIG 7 2 DVD 7 DISC TYPE JUDGEMENT WAVEFORMS F IC401 PIN 13 CD_DVDCT IC501 PIN 133 RF IC501 PIN 160 FIG 7 1 DVD...

Страница 42: ...3 15 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...

Страница 43: ...3 16 CD_DVDCT IC501 PIN 133 FOO IC501 PIN172 F IC401 PIN 13 F IC401 PIN 14 FIG 8 2 CD 8 FOCUS ON WAVEFORMS CD_DVDCT IC501 PIN 133 FOO IC501 PIN172 F IC401 PIN 13 F IC401 PIN 14 FIG 8 1 DVD...

Страница 44: ...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 IC...

Страница 45: ...3 18 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...

Страница 46: ...3 19 2 Y IC501 PIN 113 FIG 11 2 1 Audio L R FIG 12 1 12 AUDIO OUTPUT FROM PWM IC IC701 PIN 1 7...

Страница 47: ...3 20 BCK IC501 PIN 124 LRCK IC501 PIN 117 ASDATA3 2 Audio related Signal ADATA0 IC501 PIN 118 FIG 12 2...

Страница 48: ...3 21 1 R620 TP611 or R621 TP612 2 R618 TP609 or R619 TP610 3 R612 TP603 or R613 TP604 4 R610 TP601 or R611 TP602 5 R614 TP605 or R615 TP606 6 R616 TP607 or R617 TP608 13 DVD AMP WAVEFORMS...

Страница 49: ......

Страница 50: ...061026 3 23 3 24 DVD AMP CIRCUIT DIAGRAM 1 MPEG CIRCUIT DIAGRAM...

Страница 51: ...061026 3 25 3 26 2 DSP AMP CIRCUIT DIAGRAM...

Страница 52: ...THE SERVICE PERSONNEL TO THE PRESENCE OF IMPORTANT SAFETY INFORMATION IN SERVICE LITERATURE 4 1 4 2 CABINET AND MAIN FRAME SECTION A B C A B A26 463 463 465 465 260 261 A44 463 463 473 A46 250 A47 C A...

Страница 53: ...4 3 4 4 DECK MECHANISM EXPLODED VIEW DP 10T 026 001 002 003 A01 020 018 014 013 017 435 012 A26 019 012 440 015B 015A 015 016 A02 439 012A 012A 010 432 030 025 024 439 431 435 430 021 036 A03...

Страница 54: ...4 5 PACKING ACCESSORY SECTION BATTERY 808 INSTRUCTION ASSEMBLY 801 REMOCON 900 824 ANTENNA LOOP AM 825 ANTENNA FM BAG 804 PACKING CASING 803 BOX 802 PACKING CASING 803 811 RCA CABLE VIDEO 1WAY...

Страница 55: ...T CENTER REAR SPEAKER SH22SF SY 852 853 850 851S WIRE84 WIRE83 WIRE82 WIRE81 WIRE80 A84 A83 A82 A81 A80 F R SPK F R SPK F L SPK CENTER SPK R R SPK R L SPK F L SPK R R SPK R L SPK REAR SPK FRONT CENTER...

Страница 56: ...5 2 4 LHS 96SB PASSIVE SUBWOOFER SPEAKER SH22SF WY 950 WIRE90 951 952 953 954 A90...

Страница 57: ......

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