6 Exploded View and Parts List
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6-1 LW15E33C

LW15E33C/LW17E34C
6 Exploded View & Parts List

6-2 LW17E34C

5 Troubleshooting

5-1 No Power

Does proper DC 14 V appear at DC jack connected to CN12? No Check SMPS PCB and adapter.
Does proper DC 5 V appear at Pin 2 of IC11?

Check IC11.

Does proper DC 14V appear at Pin 1 of IC11?
Does proper DC 3.3 V appear at Pin 3 of IC14?

Check IC14.

Does proper DC 2.5 V appear at Pin 4 of IC109 and IC17?

Check IC109 and IC17.

Check IC23.

LW15E33C/LW17E34C

5-2 No Video (PC Signal)
Power indicator is green. Yes Does the signal appear at IC134, IC135, IC136 of R, G, B input? Yes No Check CN11.
Does the clock pulse appear at X21?
Check X21 and related circuit of X21.
Does the clock pulse appear at output of <RA35~RA39, RA310>15 <RA35~RA39, RA310, RA313~318>17?
Check related circuit of IC32.
Does the clock pulse appear at output of <R611~R620>15 <R611~R620, R61~R69, R610>17?
Replace <R611~R620>15 <R611~R620, R61~R69, R610>17.

Replace LCD panel.

5-3 No Picture (TV, Video, S-Video)
Check Pin 55, 56 (S-Video) and Pin 52 (VCR) and Pin 74 and Pin 53 (RF-CVBS) of IC401 (VSP9407). Yes
Check CN41 (Tuner) and CN26 (VCR connector).
Does the signal appear at RA33, RA34, RA311, RA312?
Check IC401 (VSP9407) and related circuit.
Does signal appear at <RA35~RA39, RA310>15 <RA35~RA39, RA310, RA313~RA318>17 of related IC32?
Check IC32 and related circuit.
Yes Check IC61, 62 and <R611, R612, ~R620>15 <R611, R612, ~R620, R61~R69, R610>17.

5-4 No Sound

Does the signal appear at Pin 67 (Tuner sound signal) and Pin 57, 56 (PC sound) and Pin 51, 50 (VCR sound) of IC53 (MSP3421G)?
Check CN11 (PC conector) and CN26 (VCR connector).
Does the signal appear at Pin 27, 28 of IC53 (MSP3421G)?
Does the signal appear at L53~L56?
Check IC55 (Audio amp) and related circuit.

Replace the speaker.