Zenith DVR313 Series, Service Manual

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3-1
SECTION 3
ELECTRICAL
CONTENTS
ELECTRICAL TROUBLESHOOTING GUIDE
......................................................................3-2
1. System Part .............................................................................................................................3-2
2. Disc recognition unavailable .................................................................................................3-2
3. No Audio Output in DISC Play ...............................................................................................3-3
4. No Optical / Digital Audio Output ..........................................................................................3-3
5. No Tuner Sound ......................................................................................................................3-4
6. No Outside Input 1 Audio ......................................................................................................3-5
7. No Outside Input 2 Audio ......................................................................................................3-6
8. No Signal of Component Screen in DISC Play ....................................................................3-7
9. No Signal of COMPOSIT / S-VIDEO Screen in Disc Play ....................................................3-8
10. No Signal of TV, outside input screen ................................................................................3-9
11. No Signal of DV(IEEE 1394) input (screen/audio) ...........................................................3-10
BLOCK DIAGRAMS
..................................................................................................................3-11
1. THE WHOLE OF H/W BLOCK DIAGRAM .............................................................................3-11
2. POWER (MAIN) BLOCK DIAGRAM ......................................................................................3-13
3. AUDIO IN/OUT BLOCK DIAGRAM ........................................................................................3-15
4. FLD/MICOM/TUNER BLOCK DIAGRAM ...............................................................................3-17
5. MICOM BLOCK DIAGRAM ....................................................................................................3-19
6. VIDEO IN/OUT BLOCK DIAGRAM ........................................................................................3-21
CIRCUIT DIAGRAMS
................................................................................................................3-23
1. POWER CIRCUIT DIAGRAM .................................................................................................3-23
2. FRONT CIRCUIT DIAGRAM...................................................................................................3-25
3. E5 BGA, POWER, UART2 CIRCUIT DIAGRAM....................................................................3-27
4. DDR SDRAM, FLASH CIRCUIT DIAGRAM...........................................................................3-29
5. RST, CONTROL/STATUS REG, ATAPI, HOST CPLD, LATCH CIRCUIT DIAGRAM ..........3-31
6. 1394, ETHERNET CONNECTOR CIRCUIT DIAGRAM .........................................................3-33
7. VIDEO IN/OUT CIRCUIT DIAGRAM ......................................................................................3-35
8. AUDIO IN/OUT NON-STD VIDEO CIRCUIT DIAGRAM ........................................................3-37
9. A/V, 1394 IN JACK CIRCUIT DIAGRAM................................................................................3-39
10. AUDIO IN/OUT CIRCUIT DIAGRAM ....................................................................................3-41
11. I/O MICOM CIRCUIT DIAGRAM ...........................................................................................3-43
12. TUNER/VIDEO IN/OUT CIRCUIT DIAGRAM .......................................................................3-45
• WAVEFORMS ...........................................................................................................................3-47
• CIRCUIT VOLTAGE CHART ...................................................................................................3-49
PRINTED CIRCUIT DIAGRAMS
............................................................................................3-53
1. MAIN P.C.BOARD(TOP SIDE)................................................................................................3-53
2. MAIN P.C.BOARD(BOTTOM SIDE)........................................................................................3-55
3. I/O P.C.BOARD .......................................................................................................................3-57
4. JACK P.C.BOARD ..................................................................................................................3-57
5. FRONT P.C.BOARD................................................................................................................3-59
6. KEY P.C.BOARD.....................................................................................................................3-59