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20
CH 2 : Focus Up / Down FE
CH 3 : S curve
CH 4 : Focus Servo On
If the power of IC101 and GND, soldering
is normal when you check, replace IC101.
If the power of IC201 and GND, soldering
is normal when you check, replace IC401.
If the power of IC201 and GND, constant
is normal when you check, replace IC201.
The below waveform(CH B) is
outputted in ICIC401 45, 46pin ?
FOCUS UP / DOWN ?
Dose the S-curve below come out of the
76(TP:FE)pin of IC101after insertion of a disc ?
Is the waveform above input
through the 128pin of IC201 ?
Y
Y
If the power of IC201 and GND, soldering
is normal when you check, replace IC201.
N
N
The below waveform(CH B) is
outputted in IC201 132pin ?
N
N
N
N
Y
1. Is the FPC Wire inserted normally
into the CN10?
2. Isn’t the FPC wire disconnected ?
Y
1. Try again after a normal insertion of the
connector into FPC Wire.
2. Try again after replace of FPC Wire.
Replace Pick-up.
Y
Y
No FOCUS LOCK
Summary of Contents for SW-248B
Page 5: ...4 Disassembly Diagram ...
Page 15: ...14 Block Diagram ...
Page 25: ...24 Circuit Diagram Main ...
Page 26: ...25 Circuit Diagram Front ...