Integra DLV-100, Service Manual

Page: 13 / 48

TROUBLESHOOTING
2. MAIN PWB, SUB PWB (PWC-4448A)
• Are the following voltage inputs available at POPA (connection between POWER unit and POPA)?
Pin No. Related circuits
1 +12V AUDIO circuit
2 GND GND
3 +5V RGB, VIDEO signal processing system
4 +5V RGB, VIDEO signal processing system
5 GND GND
6 GND GND
7 +5V CPU, FLASHROM, DRAM, G/A
8 +5V CPU, FLASHROM, DRAM, G/A
9 GND GND
10 GND GND
11 —
No
→
Connections of the POPA connector are defective. The POWER unit is defective.
Yes
• Are the following voltage inputs available at POPB (connection between POWER unit and POPB)?
Pin No. Related circuits
1 +12V Fan and formatter board
2 GND FANGND
3 +3.3V Formatter board
4 +3.3V Formatter board
5 +3.3V Formatter board
6 GND GND
7 GND GND
8 GND GND
No
→
Connections of the POPB connector are defective. The POWER unit is defective.
Yes
• Are the following signal outputs available at PODA (connection between Optical Engine unit and PODA)?
Pin No.
6, 8, 10, 12, 14, 16, 18
+3.3V
61, 63, 65 +12V
67, 69, 71 +5V
92 Horizontal sync signal (TTL)
31 Vertical sync signal (TTL)
33 Enable signal (TTL)
35 Clock sync signal (TTL)
37, 39, 41, 43, 96, 98, 100, 102 B-ch signal (TTL)
45, 47, 49, 51, 104, 106, 108, 110 R-ch signal (TTL)
53, 55, 57, 59, 114, 116, 118, 120 G-ch signal (TTL)
No
→
Connections of the PODA connector are defective. The MAIN or SUB PWB is defective.
Yes
• Optical engine unit out of order
• Miscellaneous. Problem in the MAIN and SUB PWBs.
Poor contact in the connector (POMA1–POMA2, POMB1–POMB2) between MAIN PWB and SUB PWB.
Inadequate soldering or cracks in PWB.
DLV-100