NEC PlasmaSync 50MP1, Руководство пользователя

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7
1
No pictures available only in the NTSC mode (ternary Y/C separation defective)
NO
Is a composite signal available Failure in Q5302 to Q5305.
at Pin 88 of IC5313?
(See Fig. 8.)
YES
YES YES
Are the Y/C signals available Are the Y/C signals available Failure in IC5306 to IC5309.
at TP5310/TP5311? (Similar at TP5309/TP5308?
waveforms in Figs. 9 and 10) (See Figs. 9 and 10.)
NO NO
Does oscillation take place at Q5320 to Q5327 and peripheral
Pins 30 and 31 of IC5313? circuits are out of order.
(See Fig. 11.)
YES
YES YES
Is power fed to IC5313? Is power fed to IC5312? IC5313 or IC5312 is out of
order.
NO
IC5316 and peripheral circuits
are out of order.
NO
YES
IC5313 and peripheral circuits IC5316 and peripheral circuits
are out of order. are out of order.
Conditions:
1. During the reception of
VIDEO NTSC C-BAR
2. Mode VIDEO
64us
20MHz sine wave
2.3Vpp
16ms
0.9Vpp
Burst section ; 300mVpp
Fig. 8
Signal VIDEO at Pin 8 of IC5313 Fig. 9
Signal Y at TP5308 Fig. 10
Signal C at TP5309
Fig. 11
Oscillation waveform at Pin 30 of IC5313
1Vpp