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§ Troubleshooting
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Does DC level change at pins
18 and 19 of 1C201 when you
push the front panel button?
Check the button
(SW201-SW205 and
SW206-SW210)
Yes
Does DC level change at
positive pole of C203 to
Check IC201.
Yes
C212 when you push the
Does DC 8V appear at
OK.
front panel button?
pins 5 and 26 of 1401?
{See table 9-1)
No
Yes
Check !C201,1C202 and
RESET circuit.
Table 9-1. Front Panel Button
Pinbalance
Vertical Linearity
Horizontal Size
Vertical Size
Horizontal Position
Vertical Position
Side Pincushion
Trapezoid
Parallelogram
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