Akai 29CTF05BS Service Manual page 40

A
No snow noise
Check pin 104 &
105 of IC 2100.
Normal
Noise or signal
appear.
YES
Does AV input at
AV1 & AV2 normal ?
NO
Check pin 71 & 78 of
YES
IC 2100. Does signal
or noise appear ?
NO
Check circuit
between AV-in
terminal and pin 71 &
78 of IC 2100.
Abnormal
Check TU 51 (Tuner),
SF 202 and its
related circuit.
Check IC 2100 and
its related circuits.
Check IC 2100 RGB
YES
out at pin 42, 43 & 44.
Is the output normal ?
NO
Check IC 2100 and
its related circuit.
4 – 5
Does signal output
YES
at pin 7, 8 & 9 of
IC 851 normal ?
NO
Check IC 851 at
input pin 1, 2 & 3
and its related
circuit.
29CTF05BS
Check the related
circuit of screen
heater (FBT) and
the CRT.