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KS-AX7700
QQ
3 7 63 1515 0
3.1 Adjustment method
(1) Check the voltage and frequency of the secondary toroidal
coil.
FREQUENCY:24.35kHz±10Hz
VOLTAGE VALUE:55Vp-p
TE
L 13942296513
(2) Measure the secondary toroidal coil, if the standard
frequency value of 24.35 kHz ±10 Hz is not attained,
measure the R760 terminal, then adjust the VR701 so that
the R760 terminal becomes 24.25 kHz± 10Hz.
NOTE:
When measuring, adjust and apply power with no
signal or load on each board.
DC/DC CONVERTER SECOND GENERATOR SWITCHING
TEST ITEM
VOLTAGE TEST
FREQUENCY CHECK
www
1-6 (No.49809)
http://www.xiaoyu163.com
SPECIFICATION
88Vp-p±2.5V
OSCILLOSCOPE
VOLT/DIV: 10
TIME/DIV: 10msec
VARIABLE: MINIMUM
24.350KHz±10Hz
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ao
y
.
i
http://www.xiaoyu163.com
SECTION 3
8
Adjustment
FREQUENCY COUNTER
TEST SET
Main board
Q Q
3
6 7
1 3
CONDITION
u163
.
2 9
9 4
2 8
POWER SUPPLY
14.4V
(+)
(-)
Measuring
Points
1 5
0 5
8
2 9
9 4
88Vp-p
±2.5V
m
co
9 9
2 8
9 9
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