Zenith DVB318, Руководство по обслуживанию

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3-1
SECTION 3
ELECTRICAL
CONTENTS
ELECTRICAL TROUBLESHOOTING GUIDE & WAVEFORMS
.................................. 3-2
1. System Clock X501 (27Mhz).....................................................................................................3-2
2. Initializing between MPEG and SDRAM ..................................................................................3-2
3. Initializing between MPEG(FLI2301B) and Flash ...................................................................3-3
4. Sil170B is nitialized by M-Reset and D-Reset ........................................................................3-3
5. Reference Voltage 1 ..................................................................................................................3-3
6. Reference Voltage 2 ..................................................................................................................3-4
7. Checking the initial step of M/D Ass’y ....................................................................................3-4
8. Checking the Video Signal .......................................................................................................3-5
9. Checking the first step of servo (1).........................................................................................3-5
10. Checking the second step of servo (2) .................................................................................3-6
11. Checking the output of Audio signal.....................................................................................3-6
12. Checking the reset port ..........................................................................................................3-7
13. Checking the focus & tracking servo....................................................................................3-7
14. Checking the track jump ........................................................................................................3-8
15. The status of CD_LD and DVD_LD in the PLAY MODE.......................................................3-8
16. The status Focus and spindle motor ....................................................................................3-9
17. DATA STREAM.........................................................................................................................3-9
18. Input Clock to IC202..............................................................................................................3-10
19. Tray Open and Close ............................................................................................................3-10
20. Focus Drive signal(FACT).....................................................................................................3-11
21. Signals for Front micom .......................................................................................................3-11
22. FACT and FE for DVD9 (Dual disc)......................................................................................3-12
23. System clock of MPEG IC ....................................................................................................3-12
24. 480P ........................................................................................................................................3-13
25. 720P ........................................................................................................................................3-13
26. 1080i .......................................................................................................................................3-14
BLOCK DIAGRAMS
................................................................................................................ 3-15
1. DVD Overall Block Diagram ...................................................................................................3-15
2. POWER Block Diagram ..........................................................................................................3-16
3. SERVO Block Diagram............................................................................................................3-17
4. MPEG Block Diagram .............................................................................................................3-18
5. GENESIS & DVI BLOCK Diagram ..........................................................................................3-19
6. AUDIO Block Diagram.............................................................................................................3-20
CIRCUIT DIAGRAMS
.............................................................................................................. 3-21
1. Power(SMPS) Circuit DIAGRAM ............................................................................................3-21
2. RF & SERVO Circuit DIAGRAM..............................................................................................3-23
3. SYSTEM Circuit DIAGRAM .....................................................................................................3-25
4. AUDIO & JACK Circuit DIAGRAM..........................................................................................3-27
5. Timer/5.1CH Circuit DIAGRAM...............................................................................................3-29
6. DVI Circuit DIAGRAM..............................................................................................................3-31
• CIRCUIT VOLTAGE CHART ......................................................................................................3-33
PRINTED CIRCUIT DIAGRAMS
.......................................................................................... 3-31
1. MAIN P.C.BOARD (TOP VIEW) ...............................................................................................3-39
2. MAIN P.C.BOARD (BOTTOM VIEW) .......................................................................................3-41
3. KEY P.C.BOARD ......................................................................................................................3-43
4. TIMER P.C.BOARD ..................................................................................................................3-43
5. POWER(SMPS) P.C.BOARD ...................................................................................................3-45
6. DVI P.C.BOARD........................................................................................................................3-46