Zenith ZH-T202SF Series Servisní příručka

SERVICE MANUALProduct Type: DVD HOME THEATER SYSTEMChassis: DP10-TManual Series: ZH-T202SFManual Part #: AFN32633706Model Line: CProduct Year: 2007GEN

2-1SECTION 2. AUDIO PARTAUDIO TROUBLESHOOTING GUIDE1. Power Supply CircuitInsert power cord.Check power plug and powersupply circuit.Turn power on.OKN

2-22. Front circuit (1/2)Power on.Reconnect it.(Refer to notice *1)Refer to SMPS part.Check pattern and resolderingFront B/D ok.Red LED turn off?Check

2-33. Front circuit (2/2)Refer toMICOM circuit.Check if thepower part of thefront is ok?Check ifR345~R350ok?Refer to power(SMPS).NoReplace R345 ~ R350

2-4 2-5WIRING DIAGRAM061026

2-6 2-7BLOCK DIAGRAM061026

061026IMPORTANT SAFETY NOTICEWHEN SERVICING THIS CHASSIS, UNDER NO CIR-CUMSTANCES SHOULD THE ORIGINAL DESIGN BEMODIFIED OR ALTERED WITHOUT PERMISSIONF

2-10 2-112. µ-COM(MAIN) CIRCUIT DIAGRAM 061026

2-12 2-133. MOTOR & SERVO CIRCUIT DIAGRAM 061026

2-14 2-154. I/O CIRCUIT DIAGRAM 061026

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

2-16 2-175. MIC CIRCUIT DIAGRAM061026

2-18 2-196. FRONT JACK CIRCUIT DIAGRAM070102

2-20 2-217. FRONT CIRCUIT DIAGRAM061026

2-22 2-23PRINTED CIRCUIT BOARD DIAGRAMS1. MAIN P.C. BOARD DIAGRAM ( TOP VIEW )

2-24 2-252. MAIN P.C. BOARD DIAGRAM ( BOTTOM VIEW )

2-26 2-273. SMPS P.C. BOARDNOTE: WarningParts that are shaded are critical withrespect to risk of fire or electrical shock.

2-28 2-294. FRONT JACK P.C BOARD5. FRONT P.C.BOARD

3-1ELECTRICAL TROUBLESHOOTING GUIDE1. System operation flowSECTION 3. DVD & AMP PART1. Initializes SERVO, DSP & RISC registers.2. Write RISC c

3-22. Test & debug flowYesYesYesYesNoSwitch on the Power PCBA.Replace FLASH.Check the POWER PART.NoCheck the POWER PART.NoCheck the regulators or

1-2SERVICING PRECAUTIONSNOTES REGARDING HANDLING OF THE PICK-UP1. Notes for transport and storage1) The pick-up should always be left in its conductiv

3-3APower On.Check AV cableconnection to TV set.Check connection lines between FLASH &ES8380 and the FLASH access time whetheris suitable or not.C

3-4BDo not put in disc and closetray.Does the SLEDmove to inner side when it isat outer position?Optical Lenshas movements forsearching Focus?CCheck t

3-5CLaser turns on whenreading disc?Put disc in?DCheck the laser power circuit onES8380 and connecting topower transistor.(Q405, Q406).Check the relat

3-6DFocus on ok?ECheck connections betweenES8380 and pick-up head.Check the related circuit onES8380 CD-DVDCT.Check the TRACK connectionon ES8380 and

3-7ENormal Audiooutput when discplayback?Check connection betweenIC701 BCK, LRCK, ADATAO.Check the related circuit ofPWM.(Check Audio outPins 54, 55,

3-83. AUDIO µ-COM Circuit(DVD & AMP)YESDoes CD/DVD appearat FLD?Does AUX, SCART, OPTand FM 87.5 appear at FLD.OKDoes Loading appearat FLD?POWER ON

3-9DETAILS AND WAVEFORMS ON SYSTEM TEST AND DEBUGGING1. SYSTEM 27MHz CLOCK,RESET,FLASH R/W SIGNAL1) ES8380 main clock is at 27MHz(X501)3.8V, 27MHzFIG

3-102. SDRAM CLOCK1) ES8380 main clock is at 27MHz(X501)(IC502 PIN 38)DCLK = 93MHz, Vp-p=2.2, Vmax=2.7VFIG 2-13) Flash R/W enable signal during downlo

3-113. TRAY OPEN/CLOSE SIGNAL1) Tray open/close waveformOPENSW(P401 PIN3)CLOSESW(P401 PIN4)OPEN(IC401 PIN 1)CLOSE(IC401 PIN 2)FIG 3-12) Tray close wav

3-124. 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 1

1-3NOTES REGARDING COMPACT DISC PLAYER REPAIRS1. Preparations1) Compact disc players incorporate a great many ICs as well as the pick-up (laser diode)

3-135. 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

3-14F+(IC401 PIN 13)CD_DVDCT(IC501 PIN 133)RF(IC501 PIN 160)FIG 7-2 (DVD)7. DISC TYPE JUDGEMENT WAVEFORMSF+(IC401 PIN 13)CD_DVDCT(IC501 PIN 133)RF(IC5

3-15F+(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)

3-16CD_DVDCT(IC501 PIN 133)FOO(IC501 PIN172)F+(IC401 PIN 13)F-(IC401 PIN 14)FIG 8-2 (CD)8. FOCUS ON WAVEFORMSCD_DVDCT(IC501 PIN 133)FOO(IC501 PIN172)F

3-179. 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 9-110

3-18CD_DVDCT(IC501 PIN 133)TRO(IC501 PIN 174)TR-(IC401 PIN 12)TR+(IC401 PIN 11)FIG 10-2(CD)11. ES8380 VIDEO OUTPUT WAVEFORMS1) Full colorbar signal(CO

3-192) Y(IC501 PIN 113)FIG 11-21) Audio L/RFIG 12-112. AUDIO OUTPUT FROM PWM IC(IC701 PIN 1, 7)

3-20BCK(IC501 PIN 124)LRCK(IC501 PIN 117)ASDATA32) Audio related SignalADATA0(IC501 PIN 118)FIG 12-2

3-211)• R620 → TP611orR621 TP6122)• R618 → TP609orR619 TP6103)• R612 → TP603orR613 TP6044)• R610 → TP601orR611 TP6025)• R614 → TP605orR615 TP6066)• R6

1-4ESD PRECAUTIONSElectrostatically Sensitive Devices (ESD)Some semiconductor (solid state) devices can be damaged easily by static electricity. Such

0610263-23 3-24DVD & AMP CIRCUIT DIAGRAM1. MPEG CIRCUIT DIAGRAM

0610263-25 3-262. DSP & AMP CIRCUIT DIAGRAM

OPTIONAL PARTNOTES) THE EXCLAMATION POINT WITHIN AN EQUILATERAL TRIANGLE IS INTENDED TO ALERT THE SERVICE PERSONNEL TO THE PRESENCE OF IMPORTANT SAFET

4-3 4-4• DECK MECHANISM EXPLODED VIEW(DP-10T)026001002003A01020018014013017435012A26019012440015B015A015016A02439012A012A01043203002502443943143543002

4-5• PACKING ACCESSORY SECTIONBATTERY808INSTRUCTION ASSEMBLY801REMOCON900824ANTENNA LOOP(AM)825ANTENNA (FM)BAG804PACKING, CASING803BOX802PACKING, CASI

5-1SECTION 5. SPEAKER SECTION• FRONT/CENTER/REAR SPEAKER (SH22SF-SY)852853850851SWIRE84WIRE83WIRE82WIRE81WIRE80A84A83A82A81A80F.R SPKF.R SPKF.L SPK CE

5-24. LHS-96SB• PASSIVE SUBWOOFER SPEAKER (SH22SF-WY)950WIRE90951952953954A90

1-5SERVICE INFORMATION FOR EEPROM (DVD PART)POWER ONDVD LOGO Status (NO Disk status)Remote control Pause key-->1-->4-->7-->2 in order.Pres

1-6SERVICE INFORMATION FOR EEPROM (AMP PART)POWER ONFLD no disc statusRemote control ‘2’ + Front ‘STOP’push same timing during 5sFLD ‘OP-0….Use arrow

1-7SPECIFICATIONSGENERALPower supply Refer to main labelPower consumption Refer to main labelNet Weight 2.4 kgExternal dimensions (W x H x D) 360 x 63