Page 1
5 Troubleshooting
5-1 No Power
Does proper DC 14 V appear at
DC jack connected to CN801?
Yes
Does proper DC 5 V appear at
Pin 1 of IC803?
Yes
Does proper DC 14V appear at
Pin 2 of IC803?
Yes
Does proper DC 3.3 V appear at
Pin 1 of IC804?
No
Check SMPS PCB and Adapter.
No
Check IC803.
No
Check IC803.
No
Check IC804.
Yes
Does proper DC 2.5 V appear at
Pin 4 of IC105?
Yes
Check IC908.
ES15A*/ES17A* 5-1
No
Check IC105.
Page 2
5 Troubleshooting
5-2 No Video (PC Signal)
Power indicator is green.
Yes
Does the signal appear
at C106, C107, C108
of R, G, B input?
Yes
Does the clock pulse
appear at X100?
Yes
Does the clock pulse appear at
output of RA102 ~ RA107?
Yes
Does the clock pulse
appear at R401?
No
Check CN100.
No
Check X100 and related circuit of X100.
No
Check related circuit of IC102.
No
Check R401 and related circuit of R401.
Yes
Does the clock pulse appear at
output of R605 ~ R614?
Yes
Replace LCD Panel.
5-2 ES15A*/ES17A*
No
Replace R605 ~ R604.
Page 3
5-3 No Picture (TV, Video, S-Video, Scart Video)
5 Troubleshooting
Check Pin 71, 72 (S-Video)
and Pin 73 (VCR) and Pin 74
(Scart-Vin) and Pin 75 (RF-CVBS)
of IC201 (VPC3230D).
Yes
Does the signal appear at
RA200 ~RA203?
Yes
Does the signal appear at
RA300 ~ RA303 of related
IC300 (FLI2200)?
Yes
No
No
No
Check the CN806 (Tuner) and the
CN200 (Scart connector) and the
CN802 (VCR connector).
Check the IC201 (VPC3230D)
and related circuit of IC201.
Check the IC300 and
related circuit of IC300.
Check the IC400 and R422 ~ R426.
ES15A*/ES17A* 5-3
Page 4
5 Troubleshooting
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) and Pin 48, 47 (Scart
sound) of IC 700 (MSP3451)?
Yes
No
Check the CN803 (PC conector) and the
CN802 (VCR connector) and the CN200
(Scart connector and the CN806 (Tuner).
Does the signal appear at Pin 27,
28 of IC700 (MSP3451)?
Yes
Does the signal appear
at L702 ~L705?
Yes
Replace the speaker.
No
No
Check the IC700 and
related circuit of IC700.
Check the IC702 (Audio amp) and
related circuit of IC702.
5-4 ES15A*/ES17A*
Loading...