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Internal Use Only
Website http://biz.lgservice.com
SERVICE MANUAL
Stylish Home Cinema System
SERVICE MANUAL
MODEL: HT32S (HT32S-D0, SH34S-F/W)
MODEL: HT32S
(HT32S-D0, SH34S-F/W)
CAUTION
BEFORE SERVICING THE UNIT, READ THE "SAFETY PRECAUTIONS"
IN THIS MANUAL.
P/NO : AFN70208650 FEBRUARY, 2009
CONTENTS
SECTION 1 SUMMARY
SERVICING PRECAUTIONS .............................................................................................................................1-2
ESD PRECAUTIONS ..........................................................................................................................................1-4
SERVICE INFORMATION FOR EEPROM .........................................................................................................1-5
HOW TO UPDATE AUDIO MICOM & DVD PROGRAMS .................................................................................1-6
SPECIFICATIONS ..............................................................................................................................................1-7
SECTION 2 ELECTRICAL PART
TROUBLESHOOTING GUIDE ...........................................................................................................................2-1
1. POWER SUPPLY CIRCUIT .......................................................................................................................2-1
2. FRONT CIRCUIT (1/2) ...............................................................................................................................2-2
3. FRONT CIRCUIT (2/2) ...............................................................................................................................2-3
4. SYSTEM OPERATION FLOW ...................................................................................................................2-4
5. TEST & DEBUG FLOW .............................................................................................................................2-5
6. AMP PROTECTION .................................................................................................................................2-11
7. AUDIO -COM CIRCUIT(DVD & AMP) ...................................................................................................2-12
DETAILS AND WAVEFORMS ON SYSTEM TEST AND DEBUGGING ........................................................2-13
1. SYSTEM 27MHZ CLOCK,RESET ...........................................................................................................2-13
2. SDRAM CLOCK .......................................................................................................................................2-14
3. TRAY OPEN/CLOSE SIGNAL .................................................................................................................2-14
4. SLED CONTROL RELATED SIGNAL (NO DISC CONDITION) .............................................................2-15
5. LENS CONTROL RELATED SIGNAL (NO DISC CONDITION) .............................................................2-16
6. LASER POWER CONTROL RELATED SIGNAL (NO DISC CONDITION) ............................................2-16
7. DISC TYPE JUDGEMENT WAVEFORMS ..............................................................................................2-17
8. FOCUS ON WAVEFORMS......................................................................................................................2-18
9. SPINDLE CONTROL WAVEFORMS (NO DISC CONDITION) ...............................................................2-18
10. TRACKING CONTROL RELATED SIGNAL (SYSTEM CHECKING) ......................................................2-19
11. ES8391 VIDEO OUTPUT WAVEFORMS ................................................................................................2-20
12. AUDIO OUTPUT FROM PWM IC ............................................................................................................2-21
13. DVD & AMP WAVEFORMS .....................................................................................................................2-22
WIRING DIAGRAM ...........................................................................................................................................2-23
BLOCK DIAGRAM ...........................................................................................................................................2-25
CIRCUIT DIAGRAMS .......................................................................................................................................2-27
1. SMPS CIRCUIT DIAGRAM......................................................................................................................2-27
2. MPEG CIRCUIT DIAGRAM .....................................................................................................................2-29
3. SERVO CIRCUIT DIAGRAM ...................................................................................................................2-31
4. INTERFACE P2 CIRCUIT DIAGRAM ......................................................................................................2-33
5. AUDIO MICOM CIRCUIT DIAGRAM .......................................................................................................2-35
6. AMP PWM CIRCUIT DIAGRAM ..............................................................................................................2-37
7. HDMI TX CIRCUIT DIAGRAM .................................................................................................................2-39
8. IPOD CIRCUIT DIAGRAM .......................................................................................................................2-41
9. FRONT TIMER CIRCUIT DIAGRAM .......................................................................................................2-43
10. TOUCH CIRCUIT DIAGRAM ...................................................................................................................2-45
11. TOUCH SLIDE CIRCUIT DIAGRAM .......................................................................................................2-47
12. POWER KEY CIRCUIT DIAGRAM ..........................................................................................................2-49
13. EJECT KEY CIRCUIT DIAGRAM ............................................................................................................2-51