Cut-Off Coarse Adjustment - Hitachi 36SDX88B Service Manual

Preparation for adjustment Adjustment procedure Notes
c) Trapezoid adjustment
Adjustment code : DO9
d) Parallelogram adjustment
F'
\
I
\
\
\
J
\
\
\
1
a
Adjustment code : DO7
3.2 Cut-off Coarse Adjustment Adj. point
Preparation for adjustment Adjustment procedure Notes
(4 ) Connect probe of the
(1) Change I IC data of adjustment
Release vertical deflection
oscilloscope to pin 1 of No. PO5 so that the voltage of ECT stop in a beeline after
ECT connector on CPT connector pin 1 become the same adjustment.
PWB. voltage as shown below.
(2) Set vertical deflection (2) Write same data of adjustment Begin cut-off adjustment on
stop in a beeline. No. PO5 to No. PO6 and No. PO7 after this data as a start which is
finish adjustment item 1.
written here when final
adjustment.
v=3.1
I!I 0.05vDC
80