- 2 -
2. No Power
Plug in after pull out the Power Cord.
Check the voltage of C829 (B+)
No Power
POWER ON at St-By.
Check D826.
Check the voltage of C809.
Check the voltage at pin 9 of IC801.
Check IC801 and peripheral
components.
Check the voltage (B+) of C829.
POWER ON
POWER LATCH
No POWER ON.
Check the B+ voltage
Check R804, R807,
R812.
Check the voltage at pin
39 of IC001.
Check the voltage of
Q803 collector.
Check IC802, IC803.
Check Fuse and D801.
Check R805, R806.
Check Q800, ZD808.
Check secondary short.
Check IC804, D809
(5.6V Regulator)
Check IC004
(Reset IC)
Check
Q802~4,
ZD828
R825, R826
Check Q800, ZD808, D806, C811
Check IC802, IC803.
Check the voltage at pin 64 of IC001.
Check the voltage at pin 29 of IC001.
Check the waveform at pins 30
and 31 of IC001.
Check X001 and replace IC001.
ST-by
normal
normal
normal
normal
A:
38~42V
0V
120V
B:
C:
D:
E:
0V
normal
abnormal
abnormal
(ST-by Vcc)
abnormal
ST-by : 38-42V
NORMAL : 120V
about 1.4times of AC input voltage
ST-by : 6.5V
NORMAL : 8.5V
NORMAL
ST-by : 0V (Low)
NORMAL : 5V (High)
abnormal
ST-by : 0V
NORMAL : 80V
OVP operation
Reset voltage
X-TAL
u-COM Vcc
