Sanyo LCD-22XR9DZ, Service Manual

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1 Alignment flow
1.1 Voltage of power supply test
According to the wiring diagram specified by product specification, connect power board, digital
board, IR/key board and backlight board correctly; then power on and press key
‘ ‘
.Test
voltage of socket X801 each pin in turn listed as
Table 1.
Table 1
Voltage of X801 each pin
X801 Pin1 2 3 4 、 5 6 、 7 8 9 10 11 12 13
Voltage Note:1 Note:2 0 12 V±5% 0 NC 5 V±5% 0 5 V±5% 0 Note:3
Note:1 Control of backlight switch (
BLK_ON
): high level (
4.7±0.2V)
:
on
；
low level(
≤ 0.5V
):
off
2 Adjustment of backlight brightness (
ADJ_PWM
): continuous adjustment in factory menu
within
2-3.6V
3 Control of power switch (
PWR_ON/OFF
): high level (
3.3±0.2V
):
on
；
low level(
≤ 0.5V
):
off
Alignment instructions
Test equipment
PM5518 (video signal generator)
VG-848 (VGA,
YPbPr
signal generator)
VG-849 (
HDMI
digital video signal generator)
CA210 (color analyzer)