Toshiba CN27E90 Technical Training Manual page 137

(F) NO COLOR (AFTER Q501)
Check waveform at pin 13 of Q501.
Burst: 0.3 to 0.6 V
P-P
OK
Check power supply of Q501.
Pin 1=5V, Pins 22, 40, 46=9V
OK
Check waveform at pins 5, 6 of Q501.
Color bar: approx. 0.6V
OK
Check waveform at pins 51, 52 of Q501.
Color bar: approx. 0.6V
OK
Check waveform of I 2 C bus line.
OK
Check Q501.
NG
Check Q503 and A/V circuit.
NG
Check power/def circuit.
NG
Check Q501 and pins 10, 11
peripherals.
P-P
NG
Check C514, C515.
P-P
NG
Check I
data, micom memory, etc.
NG
137
C bus line, and check bus
2