5
(4) Lit in green
NO
NO
Can you hear the sound of
Is the potential maintained at
IC9501 and peripheral
AC relay ON when the main
the [H] level at Pin 79 of
circuits are out of order.
power circuit is turned ON?
IC9501 (MAIN PWB)?
YES
YES
NO
Is the potential maintained at
Pull out the PM connector
the [H] level at Pin 3 of the
and check the potential at
PM connector?
Pin 3 (MAIN PWB). If the
[H] level is perceived, the
POWER unit is out of order.
If the potential is kept at the
YES
[L] level, IC9501 and periph-
eral circuits are out of order.
Failure in the POWER unit?
YES
Does it take more than 5 seconds
IC9501 (MAIN PWB) and pe-
when the main power circuit is
ripheral circuits are out of order.
turned on and then turned off?
NO
NO
Is the potential maintained at
the [H] level at Pin 3 of the PM
connector?
YES
NO
Is the potential maintained at
Failure in the periphery of the
the [H] level at Pin 1 of the PD
PDP module.
connector?
YES
YES
Is the power supply available
Failure in the HV system of the
when the PD, PH, and AD
PDP module and the POWER
connectors are disconnected?
unit, or in the periphery of the
D+5V circuit.
NO
Disconnect the PV, PQ, PN, and PA connectors, one after another
(with all others kept connected), and check whether the power supply functions normally.
• When it functions: Failure in the circuit on the disconnected connector side.
• When it does not function: Failure in the POWER unit.
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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