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C. Error Detection Process
1. Raster free
If +B is normal
Abnarmal
Check to see if voltage
is nomal when W936 is
broken.
Abnormal
Check to see if CPU
voltage is normal.
Check to see if shoet
circuit of output voltage
to ground occurs.
Check to see if 300V
is available.
Nomal
Inspect bulb filament, video
emission and shield grid voltage.
None
Insoect R933 and R505.
Inspect V403 and T401.
Ispect V402
Check to see if output
available at 40 foot
of N201.
Check to see if
CRT cathode
voltage is normal.
Check to see if R,G
anf B signal output
available at N201.
Inspect TDA6107
and peripheral
circuits.
2. Horizontal bright lines
Check to see if audio frequency signal output
available at 46 and 47 foot of N201.
Not
Inspect R258 and C233
Inspect N201
Available
Check to see if 16V and 47V
are normal.
Abnormal
Inspect R413 and R408.
Inspect T444.
Normal
Inspect N301 and
peripheral circuits.
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