TROUBLE SHOOTING TABLE (Continued)TROUBLE SHOOTING TABLE (Continued)
NO PICTUREB
No snow noise.
Does the snow noise appear
Yeson the picture tube at max No
Snow noise increase.
contrast and brightness B
control?
Check pin (6) and (7) IC800.
Does 5V appear at pin (6) and (7) NoCheck IC600, L200, TU200
of TU200 (TUNER).etc.
YesNormalAbnormal
Does 33V appear at pin (9) of No
Check IC1751, L201 etc.Noise or signal Check TU200(TUNER),
TU200.
appear.SF200 and its related parts.
Yes
Check TU200, TP201 etc.
Is AV1, AV2, AV3 or Yes
Check Q455 and its
input normal?
peripheral circuit.
No
19
Check pin (43) of
NoiseCheck IC400 and its
IC400 noise or signal
peripheral circuit.
appear?
Signal
Check pin (39) of Are pin (7), (8) and (9) of
SignalCheck IC800 RGB Yes
IC800 noise or signal IC850.
out Normal?
appear?
NoiseNoYesNo
Check IC400, Q401 Check IC800 and Check the Check IC850 and
and their peripheral its peripheral circuit.peripheral circuits their peripheral
circuit.of screen heater circuit.
(FBT) and the CRT.
29B-FG5 29B-FX5
19-119-2 |
ACEC
