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7-11 User Controls Don't Work
Does DC 5V appear at Pin 8 of
CN201?
Yes
Does the DC level change at
the positive poles of C201 to
C217 when you push the
front panel buttons?
(See table 7-2)
Yes
Check IC201, IC202 and
RESET circuit.
Table 7-2. Front Panel Button
Location
C201
C202
C203
Horizontal Position
C211
C212
C213
C214
C216
C217
CKG7507L
No
No
Function
Horizontal Size
Vertical Position
Vertical Linearity
Pinbalance
Parallelogram
Trapezoid
Side Pincushion
Vertical Size
Check the button and CF201_2
connector Ass'y.
(SW1 ~ SW5 and SW6 ~ SW10)
Check IC201.
7 Troubleshooting
7-9
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