Troubleshooting - Sony KDP-51WS550 Training Manual

Troubleshooting

To troubleshoot a video problem use the various inputs and outputs, along with the various video formats. By
using a particular input with a particular video format, circuits can be exercised and/or bypassed to determine
which circuit is causing the problem.
The following descriptions give what circuits are active and what circuits are bypassed for a given video input and
video format:
Video Inputs 1-6 (480i format):
Video Inputs 5, 6, or 7 (1080i format)
Video Inputs 1-6 (480i format)
Exercised: (Normal Picture Mode)
IC1501 AV switch (UA-board)
IC3101 A/D (BM-board)
IC3201 DRC (BM-board)
IC3301 MID circuit (BM-board)
IC3303 D/A (BM-board)
IC0401 Y/C CRT Drive (MA-board)
CRT Drive AMPS (CR, CG, CB boards)
Bypassed:
IC1506 Sub Comb (UA-board)
IC1507 YCT-Sub (UA-board)
Exercised: (Normal Picture Mode)
IC1501 AV switch (UA-board)
IC3101 A/D (BM-board)
IC3303 D/A (BM-board)
IC0401 Y/C CRT Drive (MA-board)
CRT Drive AMPS (CR, CG, CB boards)
Bypassed:
IC3201 DRC (BM-board)
IC3301 MID circuit (BM-board) Note: Basically a Feed-Through
IC1506 Sub Comb (UA-board)
IC1507 YCT-Sub (UA-board)
Exercised: (Twin Picture Mode. View Right-Side window)
IC1506 Sub Comb (UA-board)
IC1507 YCT-Sub (UA-board)
IC3301 MID circuit (BM-board)
IC3303 D/A (BM-board)
IC0401 Y/C CRT Drive (MA-board)
CRT Drive AMPS (CR, CG, CB boards)
Bypassed:
IC3101 A/D (BM-board)
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5. AX-1 Video Processing