JVC JX-S555, Руководство по обслуживанию

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JX-S555(J)
16 (No. 70251)
Symptom Check Results and Failures
16. Component
video signal is
not output.
(Y) Q401: Emitter
(Pb) Q402: Emitter
(Pr) Q403: Emitter
NO
YES
Check IC401, IC402 and their
surroundings.
Check 6 dB amp (Q404 to Q409,
Q413 to Q415), output buffer and
their surroundings.
O
(Y)
(Cb)
(Cr)
1.0 Vp-p
0.7 Vp-p
0.7 Vp-p
–
10 dBV
(0.32 Vrms)
17. Audio signals
are not output.
P
(L) IC806: Pins 6 & 7
(R) IC806: Pins 1 & 2
NO
YES
Go to check
Q
.
Check IC808, IC809 and their
surroundings.
–
10 dBV
(0.32 Vrms)
Q
(L) IC801 to IC805: Pins 7
(R) IC801 to IC805: Pins 1
NO
YES
Check IC801 to IC805 and
their surroundings.
Check IC101 and surroundings.
–
10 dBV
(0.32 Vrms)
18. Audio signals
are not output
at the Monitor.
R
(L) IC807 pins 6 & 7
(R) IC807 pins 1 & 2
NO
YES
Check IC807 and surroundings.
Check CN806 and wire.
14. Malfunction in
Y/C mixing of
CH1 to CH4
inputs.
Q107: Emitter
(Monitor output: Q115 emitter)
NO
YES
Check IC101 and surroundings.
Check IC103 and their surroundings.
M
2.0 Vp-p
15. Malfunction in
Y/C mixing of
CH5 input.
Q122: Emitter NO
YES
Check Q105, Q106, Q121,
Q122 and their surroundings.
Check IC103 and their surroundings.
N
2.0 Vp-p
Check Points Normal Voltage/Waveform