LG ZHD-311 Service Manual
LG ZHD-311 Manual
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- LG ZHD-311 | Service Manual - Page 1
SERVICE MANUAL MODEL : ZHD-311 LHS-25SCS/LHS-25SCW SERVICE MANUAL Product Type: DVD/CD RECEIVER Chassis: DP9 Manual Series: ZHD-311, LHS-25SCS, LHS-25SCW Manual Part #: Model Line: D Product Year: 2005 Model Series: ZHD-311 Printed in U.S.A CONTENTS GENERAL 1 AUDIO PART 2 DVD & AMP PART 3 - LG ZHD-311 | Service Manual - Page 2
• SERVICING PRECAUTIONS 1-2 • ESD PRECAUTIONS 1-4 • SPECIFICATIONS 1-5 SECTION 2. AUDIO PART • AUDIO TROUBLESHOOTING GUIDE 2-1 • BLOCK DIAGRAM 2-4 • SCHEMATIC DIAGRAMS 2-6 • WIRING DIAGRAM 2-18 • PRINTED CIRCUIT DIARGAMS 2-20 SECTION 3.DVD & AMP PART • ELECTRICAL TROUBLESHOOTING GUIDE - LG ZHD-311 | Service Manual - Page 3
SECTION 1. GENERAL SERVICING PRECAUTIONS NOTES REGARDING HANDLING OF THE PICK-UP 1. Notes for 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. NEVER look directly at the laser beam, and - LG ZHD-311 | Service Manual - Page 4
excessive dust. 2. Notes for repair 1) Before replacing a component part, first disconnect the power supply lead wire from the unit 2) possibility of damage by static electricity.) 4) To prevent AC leakage, the metal part of the soldering iron should be grounded. 5) Workers should be grounded by an - LG ZHD-311 | Service Manual - Page 5
chip components. The following techniques should be used to help reduce the incidence of component damage caused by static WITH APROWHEAD SYMBOL. WITHIN AN EQUILATERAL TRIANGLE, IS INTENDED TO ALERT THE SERVICE PERSONNEL TO THE PRESENCE OF UNINSULATED "DANGEROUS VOLTAGE" THAT MAY BE OF SUFFICIENT - LG ZHD-311 | Service Manual - Page 6
*: 30W + 30W (6Ω at 1 kHz, THD 10 %) Subwoofer*: 70W (8Ω at 30 Hz, THD 10 %) MONITOR MIC Jacks (ø3.5mm) (KARAOKE MODEL ONLY)) SPEAKERS Type Impedance Frequency Response Sound Pressure Level Rated Input Power Max. Input Power Net Dimensions (W x H x D) Net Weight Satellite Speaker (LHS-25SCS) 1 Way - LG ZHD-311 | Service Manual - Page 7
- LG ZHD-311 | Service Manual - Page 8
SECTION 2. AUDIO PART AUDIO TROUBLESHOOTING GUIDE 1. POWER SUPPLY CIRCUIT 2-1 - LG ZHD-311 | Service Manual - Page 9
2. FRONT CIRCUIT (1/2) PIN3 PIN4 PIN9 : -32.4 VKK : -27.5 FL: -23.7 FL+ : +5.0 CN902 CN902 2-2 - LG ZHD-311 | Service Manual - Page 10
3. FRONT CIRCUIT (2/2) 2-3 - LG ZHD-311 | Service Manual - Page 11
- LG ZHD-311 | Service Manual - Page 12
BLOCK DIAGRAM 2-4 2-5 - LG ZHD-311 | Service Manual - Page 13
SCHEMATIC DIAGRAMS 1. POWER SCHEMATIC DIAGRAM A B C D E F G H I J K L M N O P Q R S T 2-6 2-7 - LG ZHD-311 | Service Manual - Page 14
2. MICOM SCHEMATIC DIAGRAM A B C D E F G H I J K L M N O P Q R S T 2-8 2-9 - LG ZHD-311 | Service Manual - Page 15
3. FRONT SCHEMATIC DIAGRAM A B C D E F G H I J K L M N O P Q R S T 2-10 2-11 - LG ZHD-311 | Service Manual - Page 16
4. DSP& SCHEMATIC DIAGRAM A B C D E F G H I J K L M N O P Q R S T 2-12 2-13 - LG ZHD-311 | Service Manual - Page 17
5. DSP SCHEMATIC DIAGRAM A B C D E F G H I J K L M N O P Q R S T 2-14 2-15 - LG ZHD-311 | Service Manual - Page 18
6. KARAOKE SCHEMATIC DIAGRAM(KARAOKE MODEL ONLY) A B C D E F G H I J K L M N O P Q R S T 2-16 2-17 - LG ZHD-311 | Service Manual - Page 19
WIRING DIAGRAM 2-18 2-19 - LG ZHD-311 | Service Manual - Page 20
PRINTED CIRCUIT BOARD DIAGRAMS 1. MAIN/DVD P.C. BOARD DIAGRAM (TOP) 2-20 2-21 - LG ZHD-311 | Service Manual - Page 21
2. MAIN/DVD P.C. BOARD DIAGRAM (BOTTOM) 2-22 2-23 - LG ZHD-311 | Service Manual - Page 22
3. FRONT P.C. BOARD 2-24 2-25 - LG ZHD-311 | Service Manual - Page 23
4. SMPS P.C. BOARD LOCATION GUIDE 5. KARAOKE P.C. BOARD (KARAOKE MODEL ONLY) 2-26 2-27 - LG ZHD-311 | Service Manual - Page 24
SECTION 3. DVD & AMP PART ELECTRICAL TROUBLESHOOTING GUIDE 1. System operation flow Power On 1. 8082 initializes SERVO, DSP & RISC registers 2. Write RISC code to SDRAM 3. Reset RISC Show LOGO Yes 1. Stop Playback & Open Tray 2. Display tray open message & LOGO No Receive Yes CLOSE Key? 3-1 - LG ZHD-311 | Service Manual - Page 25
on the Power PCBA Is the DC Voltage outputs OK? No (-34V,-9V,36V,5.6V ,5V,8V,9V,2.5V, 3.3V) Yes Check the POWER PART Check the POWER PART Are 3.3V and 5V DC No outputs normal on main PCBA? Yes Update FLASH(IC500) No successfully? Yes A Check the regulators or diode - LG ZHD-311 | Service Manual - Page 26
A , 115. 3-3 - LG ZHD-311 | Service Manual - Page 27
B 3-4 - LG ZHD-311 | Service Manual - Page 28
C ES6698. ES6698. ES6698. 3-5 - LG ZHD-311 | Service Manual - Page 29
D 3-6 - LG ZHD-311 | Service Manual - Page 30
E PWM IC received correct data stream? Normal PWM IC out?(IC300) Check connection between IC300 ABCK, ALRCK, ASDAT Check the related circuit of PWM.(Check Audio out Pins52, 54, 55, 59,62, 68 Check Digital Amp circuit (IC301, IC302) 3-7 - LG ZHD-311 | Service Manual - Page 31
power part of Main NO appear at FLD? B/D. YES YES Refer to SMPS. Check if DVD an Audio Micom Insert is OK. YES NO Check oscillator of X101. Refer to oscillator Circuit. YES Check Power. YES NO Check if IC101 Pin80 NO is high. YES Check IC101 Reset Waveform. Check DVD Module. Check - LG ZHD-311 | Service Manual - Page 32
DETAILS AND WAVEFORMS ON SYSTEM TEST AND DEBUGGING 1. SYSTEM 27MHz CLOCK,RESET,FLASH R/W SIGNAL 1) ES6698FD main clock is at 27MHz(X501) 3.8V, 27MHz FIG 1-1 2) ES6698FD reset is high active. Power Cord in FIG 1-2 3-9 5.2VA PWR_CTL(SYSTEM µ-COM) IC501 PIN83) M_RESET(IC501 PIN 207) URST(IC501 PIN - LG ZHD-311 | Service Manual - Page 33
4) Flash R/W enable signal during download(Downloading) FRD(IC500 PIN 28) FWR(IC500 PIN 11) 2. SDRAM CLOCK FIG 1-4 1) ES6698FD main clock is at 27MHz(X501) DCLK = 93MHz, Vp-p=2.2, Vmax=2.7V (IC503 PIN 38) FIG 2-1 3-10 - LG ZHD-311 | Service Manual - Page 34
3. TRAY OPEN/CLOSE SIGNAL 1) Tray open/close waveform 2) Tray close waveform FIG 3-1 FIG 3-2 3-11 OPEN((PDM03 PIN7) CLOSE(PDM03 PIN8) TROPEN(IC402 PIN 4) TRCLOSE(IC402 PIN 5) OPEN((PDM03 PIN7) CLOSE(PDM03 PIN8) TROPEN(IC402 PIN 4) TRCLOSE(IC402 PIN 5) - LG ZHD-311 | Service Manual - Page 35
3) Tray open waveform OPEN(PDM03 PIN7) CLOSE(PDM03 PIN8) TROPEN(IC402 PIN 4) TRCLOSE(IC402 PIN 5) FIG 3-3 4. 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-(5.3V/3.7V/2.5V) (IC404 PIN 11) FIG 4-1 - LG ZHD-311 | Service Manual - Page 36
5. 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) FIG 5-1 6. LASER POWER CONTROL RELATED SIGNAL(NO DISC CONDITION) FIG 6-1 3-13 MDI1(0V/180mV) (IC401 PIN 26) LD01(5.0V//3.5V) IC401 PIN 20) LD02 - LG ZHD-311 | Service Manual - Page 37
7. DISC TYPE JUDGEMENT WAVEFORMS F+(IC404 PIN 14) FE(IC401 PIN 40) RFL(IC401 PIN 19) FIG 7-1 (DVD) FIG 7-2 (DVD) 3-14 F+(IC404 PIN 14) FE(IC401 PIN 40) RFL(IC401 PIN 19) - LG ZHD-311 | Service Manual - Page 38
F+(IC404 PIN 14) FE(IC401 PIN 40) RFL(IC401 PIN 19) FIG 7-3 (CD) FIG 7-4 (CD) 3-15 F+(IC404 PIN 14) FE(IC401 PIN 40) RFL(IC401 PIN 19) - LG ZHD-311 | Service Manual - Page 39
8. FOCUS ON WAVEFORMS FE(IC401 PIN 40) FOSO(IC501 PIN12) F+(IC404 PIN 14) F-(IC404 PIN 13) FIG 8-1 (DVD) FE(IC401 PIN 40) FOSO(IC501 PIN12) F+(IC404 PIN 14) F-(IC404 PIN 13) FIG 8-2 (CD) 3-16 - LG ZHD-311 | Service Manual - Page 40
9. 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 9-1 10. TRACKING CONTROL RELATED SIGNAL(System checking) TE(IC401 PIN 39) TRSO(IC501 PIN 13) T-(IC404 PIN 16) T+(IC404 PIN 15) FIG 10-1(DVD) 3-17 - LG ZHD-311 | Service Manual - Page 41
11. RF WAVEFORM TE(IC401 PIN 39) TRSO(IC501 PIN 13) T-(IC404 PIN 16) T+(IC404 PIN 15) FIG 10-2(CD) RFOP(2.3V/1.1V) (IC401 PIN 55) RFON(0.8V/2.0V) (IC401 PIN 57) FIG 11-1 3-18 - LG ZHD-311 | Service Manual - Page 42
12. ES6698FD VIDEO OUTPUT WAVEFORMS 1) Full colorbar signal(COMPOSIT) (IC501 PIN 110) 2) Y FIG 12-1 (IC501 PIN 113) FIG 12-2 3-19 - LG ZHD-311 | Service Manual - Page 43
13. AUDIO OUTPUT FROM PWM IC 1) Audio L/R (IC300 PIN 68, 49) 2) Audio related Signal FIG 13-1 ASDATA3 FIG 13-2 3-20 ASDAT0(IC501 PIN 117) ABCK(IC501 PIN 123) ALRCK(IC501 PIN 116) - LG ZHD-311 | Service Manual - Page 44
14. DVD & AMP WAVEFORMS 1) 2) • R315 → FRONT L 3) • R310 → FRONT R 4) • R316 → REAR 5) • R324 → REAR 6) • R303 → CENTER • R317 → WOOFER 3-21 - LG ZHD-311 | Service Manual - Page 45
- LG ZHD-311 | Service Manual - Page 46
DVD PART SCHEMATIC DIAGRAMS 1. DVD MPEG & DSP SCHEMATIC DIAGRAM A B C D E F G H I J K L M N O P Q R S T 3-22 3-23 - LG ZHD-311 | Service Manual - Page 47
2. RF & SERVO SCHEMATIC DIAGRAM A B C D E F G H I J K L M N O P Q R S T 3-24 3-25 - LG ZHD-311 | Service Manual - Page 48
3. KARAOKE SCHEMATIC DIAGRAM A B C D E F G H I J K L M N O P Q R S T 3-26 3-27 - LG ZHD-311 | Service Manual - Page 49
- LG ZHD-311 | Service Manual - Page 50
SECTION 4. EXPLODED VIEWS • CABINET AND MAIN FRAME SECTION 463 463 463 KARAOKE OPTION 283 452 A26 274 A41 A43 452 274 A50 279 261 261 463 463 463 A47 465 261 A44 320 A46 305 OPTIONAL PART 351 463 4-1 4-2 - LG ZHD-311 | Service Manual - Page 51
(MECH) PULLEY PWB(PCB) ASSEMBLY,TOTAL GEAR GUIDE FRAME BASE MOTOR ASSEMBLY GEAR GEAR TRAY GEAR PWB(PCB) ASSEMBLY,TOTAL CABLE,FLAT SHAFT SCREW,DRAWING SCREW,DRAWING SCREW,DRAWING SCREW,DRAWING SCREW,DRAWING SCREW,DRAWING NSP : Non SVC Parts SPECIFICATION HOME THEATER LH-TK750/550/250 REMARKS DISC - LG ZHD-311 | Service Manual - Page 52
SECTION 5. SPEAKER SECTION • MODEL : LHS-25SCS A800 851 852 854 853 850 A : LGEMS(MEXICO) , LGEPS(PANAMA) , LGEPR(PERU) , LGECL(CHILE) A : PETERSBURG(LITHUANIA) , SAKAL(ISRAEL) , B : LGECB(COLOMBIA) LOCA. NO. PART NO. A B DESCRIPTION SPECIFICATION 850 3701RM0168A O O NET ASSEMBLY SPK - LG ZHD-311 | Service Manual - Page 53
A900 PART NO. 3720RMF085D 5208RM0056B 4766RM0097A 3701RM0060A 353M050C 6400WSMH01A 3091RMW164A 3610RM0009A 6871RU9271F 6401RM0227A DESCRIPTION PANEL,FRONT DUCT FELT NET ASSEMBLY SCREW,DRAWING SPEAKER,WOOFER CABINET ASSEMBLY FOOT PWB(PCB) ASSEMBLY,SUBSET(AUDIO SPEAKER ASSEMBLY 5-2 SPECIFICATION
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SERVICE MANUAL
Product Type:
DVD/CD RECEIVER
Chassis: DP9
Manual Series: ZHD-311,
LHS-25SCS, LHS-25SCW
Manual Part #:
Model Line: D
Product Year: 2005
GENERAL
AUDIO PART
DVD & AMP PART
EXPLODED VIEWS
SPEAKER PART
REPLACEMENT PARTS LIST
1
2
3
4
5
6
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Published May
2005
by Technical Publications
Zenith Electronics Corporation
201 James Record Road
Huntsville, Alabama 35824-1513
Copyright © 2005 by Zenith Electronics Corporation
Printed in U.S.A
Model Series:
CONTENTS
ZHD-311
MODEL : ZHD-311
LHS-25SCS/LHS-25SCW
SERVICE MANUAL