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
Summary of Contents for PlasmaSync 50MP1
Page 1: ...USE THIS SERVICE MANUAL WHEN SERVICING Model PLA 50V1 ...
Page 10: ...PlasmaSync Plasma Monitor User s Manual NEC Technologies ...
Page 64: ...TROUBLESHOOTING 4 1 ...
Page 80: ...METHOD OF ADJUSTMENTS 5 1 ...
Page 98: ...CIRCUIT DESCRIPTION 6 1 ...
Page 113: ...METHOD OF DISASSEMBLY 7 1 ...
Page 134: ...PACKAGING 8 1 ...
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Page 147: ...PART LIST 9 1 ...
Page 158: ...CONNECTION DIAGRAMS 10 1 ...
Page 160: ...BLOCK DIAGRAMS 11 1 ...
Page 163: ...SCHEMATIC DIAGRAMS 12 1 ...
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