Toshiba SD-42HKSB Service Manual page 88

D.
CHECK A
Fig.5. RF
waveform
Check RF Eye-Pattern.
RF : 1.5-1.6V(TP2A0)
YES
Is the eye-pattern vivid?
YES
• Check IC201 Pin165.
• Check the clock at the IC201 Pins37, 59.
END
NO
Check IC2A1 Pin3.
Does the
NO
sawtooth waveform emit
at IC2A1 Pin36?
YES
Replace IC201.
• Both are normal : IC201 is defective
No signal: Pick-up is defective
NO
Does the 1.6V emit?
Check IC201 Pin84.
No signal at IC201 : IC201 is defective
- 2-46 -
NO
Replace IC2A1.
YES