Service manual

3.2.5 Linearity Failure
3.2.5.1 Horizontal Linearity Failure
Expected failure point
IC102 on the MAIN PWB or peripheral circuits
Preset Fh CS8 CS7 CS6 CS5 CS4 CS3 CS2 CS1
No. [kHz] Pin 64 Pin 63 Pin 62 Pin 61 Pin 60 Pin 59 Pin 58 Pin 57
Q562 Q561 Q566 Q565 Q568 Q567 Q563 Q564
1 31.5 H L L L L L
L
L
2 46LLLHLHLH
3 60LHLLHLHH
4 69HLHLLHHH
5 80L LHHLHHH
6 91HLHLHHHH
7 93LHHLHHHH
8 106HL LHHHHH
9 112L L HHHHHH
CS switching FET Q561 to Q568 are H: Off, L: ON
NG
Expected failure point
●
Relation of Character S capacitor changeover
Q561- Q568, C564- C568, C576-C578 or C580 on the MAIN PWB or
peripheral circuits
●Relation of linearity coil control
Q560, L561, IC101 or peripheral circuits
Check the horizontal frequency band selector.
Check voltage at Pins 57-64 of IC102 on the MAIN PWB.
OK
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