Zenith ZHD-311 Manuale Utente

SERVICE MANUALProduct Type: DVD/CD RECEIVERChassis: DP9Manual Series: ZHD-311, LHS-25SCS, LHS-25SCWManual Part #:Model Line: DProduct Year: 2005GENE

2-33. FRONT CIRCUIT (2/2)

2-4 2-5BLOCK DIAGRAM

2-6 2-7SCHEMATIC DIAGRAMS 1. POWER SCHEMATIC DIAGRAMA B C D E F G H I J K L M N O P Q R ST

2-8 2-92. MICOM SCHEMATIC DIAGRAMA B C D E F G H I J K L M N O P Q R ST

2-10 2-113. FRONT SCHEMATIC DIAGRAMA B C D E F G H I J K L M N O P Q R ST

2-12 2-134. DSP&AMP SCHEMATIC DIAGRAMA B C D E F G H I J K L M N O P Q R ST

2-14 2-155. DSP SCHEMATIC DIAGRAMA B C D E F G H I J K L M N O P Q R ST

2-16 2-176. KARAOKE SCHEMATIC DIAGRAM(KARAOKE MODEL ONLY)A B C D E F G H I J K L M N O P Q R ST

2-18 2-19WIRING DIAGRAM

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

2-20 2-21PRINTED CIRCUIT BOARD DIAGRAMS1. MAIN/DVD P.C. BOARD DIAGRAM (TOP)

2-22 2-232. MAIN/DVD P.C. BOARD DIAGRAM (BOTTOM)

2-24 2-253. FRONT P.C. BOARD

2-26 2-274. SMPS P.C. BOARD LOCATION GUIDE5. KARAOKE P.C. BOARD (KARAOKE MODEL ONLY)

3-1ELECTRICAL TROUBLESHOOTING GUIDE1. System operation flowPower OnNoYesYesYesNoNoNoShow LOGOTray Closed?Tray Close to Closed positionSLED Moves to In

3-22. Test & debug flowTESTCheck the POWER PARTNoYesNoYesNoNoYesYesCheck the POWER PARTCheck the regulators or diode(D501).1. Check 27MHz system c

3-3A, 115.

3-4B

3-5CES6698.ES6698.ES6698.

3-6D

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

3-7ECheck connection between IC300 ABCK, ALRCK,ASDATCheck the related circuit of PWM.(Check Audio out Pins52, 54, 55, 59,62, 68NormalPWM IC out?(IC300

3-83. AUDIO µ-COM Circuit(DVD & AMP)YESDoes CD/DVD appearat FLD?Does CD/DVD appearat FLD?OKDoes Loading appearat FLD?POWER ONYES YESYESDoes no Dis

3-9DETAILS AND WAVEFORMS ON SYSTEM TEST AND DEBUGGING1. SYSTEM 27MHz CLOCK,RESET,FLASH R/W SIGNAL1) ES6698FD main clock is at 27MHz(X501)3.8V, 27MHzFI

3-102. SDRAM CLOCK1) ES6698FD main clock is at 27MHz(X501)(IC503 PIN 38)DCLK = 93MHz, Vp-p=2.2, Vmax=2.7VFIG 2-14) Flash R/W enable signal during down

3-113. TRAY OPEN/CLOSE SIGNAL1) Tray open/close waveformOPEN((PDM03 PIN7)CLOSE(PDM03 PIN8)TROPEN(IC402 PIN 4)TRCLOSE(IC402 PIN 5)FIG 3-12) Tray close

3-124. SLED CONTROL RELATED SIGNAL (NO DISC CONDITION)FMSO(2.0V/1.4V/1.0V)(IC501 PIN 19)STBY(5V) – (IC401 PIN 50)SL+(4.7V/3.6V/1.9V)(IC404 PIN 12)SL-(

3-135. LENS CONTROL RELATED SIGNAL(NO DISC CONDITION)FOSO(1.5V/1.4V/1.3V)(IC501 PIN 12)F+(4.0V/3.6V/3.2V)(IC404 PIN 14)F-(4.0V/3.6V/3.2V)(IC404 PIN 13

3-14F+(IC404 PIN 14)FE(IC401 PIN 40)RFL(IC401 PIN 19)FIG 7-2 (DVD)7. DISC TYPE JUDGEMENT WAVEFORMSF+(IC404 PIN 14)FE(IC401 PIN 40)RFL(IC401 PIN 19)FIG

3-15F+(IC404 PIN 14)FE(IC401 PIN 40)RFL(IC401 PIN 19)FIG 7-3 (CD)F+(IC404 PIN 14)FE(IC401 PIN 40)RFL(IC401 PIN 19)FIG 7-4 (CD)

3-16FE(IC401 PIN 40)FOSO(IC501 PIN12)F+(IC404 PIN 14)F-(IC404 PIN 13)FIG 8-2 (CD)8. FOCUS ON WAVEFORMSFE(IC401 PIN 40)FOSO(IC501 PIN12)F+(IC404 PIN 14

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

3-179. SPINDLE CONTROL WAVEFORMS (NO DISC CONDITION)DMSO(1.4V/1.8V)(IC501 PIN 18)SP-(3.6V/2.4V)(IC404 PIN 18)SP+(3.6V/4.8V)(IC404 PIN 17)FIG 9-110. TR

3-1811. RF WAVEFORMRFOP(2.3V/1.1V)(IC401 PIN 55)RFON(0.8V/2.0V)(IC401 PIN 57)FIG 11-1TE(IC401 PIN 39)TRSO(IC501 PIN 13)T-(IC404 PIN 16)T+(IC404 PIN 15

3-1912. ES6698FD VIDEO OUTPUT WAVEFORMS1) Full colorbar signal(COMPOSIT)(IC501 PIN 110)FIG 12-12) Y(IC501 PIN 113)FIG 12-2

3-201) Audio L/RFIG 13-113. AUDIO OUTPUT FROM PWM IC(IC300 PIN 68, 49)2) Audio related SignalASDAT0(IC501 PIN 117)ABCK(IC501 PIN 123)ALRCK(IC501 PIN 1

3-211)• R315 → FRONT L2)• R310 → FRONT R3)• R316 → REAR4)• R324 → REAR5)• R303 → CENTER6)• R317 → WOOFER14. DVD & AMP WAVEFORMS

A B C D E F G H I J K L M N O P Q R ST3-22 3-23DVD PART SCHEMATIC DIAGRAMS1. DVD MPEG & DSP SCHEMATIC DIAGRAM

A B C D E F G H I J K L M N O P Q R ST3-24 3-252. RF & SERVO SCHEMATIC DIAGRAM

3. KARAOKE SCHEMATIC DIAGRAMA B C D E F G H I J K L M N O P Q R ST3-26 3-27

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

• CABINET AND MAIN FRAME SECTIONA43KARAOKE OPTION279305320A44465463A47A46463463463351463463463A26283452A41274274452A50261261261OPTIONAL PART4-1 4-2SEC

• DECK MECHANISM EXPLODED VIEW026001002003A01020018014013017435012019012440015B015A015016A02439012A012A010432030025024431435430021035A439035036A03A260

5-1SECTION 5. SPEAKER SECTION• MODEL : LHS-25SCS853854852851850A800A : LGEMS(MEXICO) , LGEPS(PANAMA) , LGEPR(PERU) , LGECL(CHILE)A : PETERSBURG(LITHUA

5-2• MODEL : LHS-25SCW953954955956958957950951952A900LOCA. NO. PART NO. DESCRIPTION SPECIFICATION950 3720RMF085D PANEL,FRONT SPK LHS-25SCW MOLD S33-74

1-5GENERALPower supply Refer to main labelPower consumption Refer to main labelWeight 2.5 kgExternal dimensions (W x H x D) 360 x 56 x 310 mmOpera

2-1SECTION 2. AUDIO PARTAUDIO TROUBLESHOOTING GUIDE1. POWER SUPPLY CIRCUIT

2-22. FRONT CIRCUIT (1/2)PIN3PIN4PIN9: -27.5 FL-: -32.4 VKK: -23.7 FL+: +5.0CN902 CN902