JVC AV-14F704 Service Manual page 15

NO RASTER
Does the RASTER
appear at maximum
BRIGHT/CONTRAST ?
No
Is the high voltage of
ANODE 27KV~28KV ?
No
Is collector voltages
of Q405 DC115V and
Q402 DC27V ?
No
Is the waveform at base
of Q402 normal ?
No
Is the waveform at pin
8 of IC601 normal ?
No
Check IC601 and associated circuit.
Yes
Is the voltage of pin 1 of
CP801 DC180V ?
No
Check the 180V line.
Yes
Is the heater voltage at
pin 4 of J801 AC6.4V ?
No
Check the HEATER circuit.
Yes
Yes
Yes
No. 52130
Yes
Check the output circuit and
associated circuit.
Yes
Contact defects of CRT or CRT
Socket.
Check FB401 and associated circuit.
Check Q402 and check peripheral
circuit.
Check the circuit from pin 8 of
IC601 to Q402.
AV-14F704
15