29A-FX8 29A-FX5
TROUBLE SHOOTING TABLE (Continued) !"#$%&'()
Circuits to be checked:
? A/V circuit.CC
? Video output.
? Peripheral circuit of Bus Line.
No snow noise.
Check pin (19) of TU201.TU201(19)
NormalAbnormal
Noise or signal Check TUNER and
appear.its related parts.
Is AV1, AV2 or AV3 Yes12
Check Q200, Q201, Q203 Q200, Q201, Q203
input normal?3
and their peripheral circuit.
30No
Does pin (5) of IC402 NoCheck IC402, IC451 and IC402(5)IC402, IC451
or signal appear?their peripheral circuit.
Yes
Does pin (15) of Are pin (8) waveforms of IC3801, IC3802, IC3803
YesIs IC2801 RGB out YesIC2801(15)IC2801 RGB
IC2801 noise or IC3801, IC3802, IC3803 (8)
Normal?
signal appear?normal?
NoNoYesNo
Check Q2402, Check the Check IC3801,
Check IC2801 and Q2402, Q2404, IC3801,
Q2404, Q2411, peripheral circuits IC3802, IC3803 IC2801
their peripheral Q2411, IC2801(FBT) CRTIC3802, IC3803
IC2801 and their of screen heater and their peripheral
circuits.
peripheral circuit.(FBT) and the CRT.circuits.
E30C30 |