14
TROUBLE SHOOTING CHARTS
A
B
A
B
GO TO
YES
DOES Q701(POWER ON/OFF TR)
OPERATE?
NO
NO POWER
GO TO
CHECK
IN/OUT VOLTAGES
OF IC801(130VOLT REG)
IN: 150V
DC
OUT: 130V
DC
2WATT
4
R816 15K
CHECK
DOES
SHUT DOWN
CIRCUIT
OPERATE?
#30
(7.5V
DC
)
30
26
5
4
24
Q402
H. OUTPUT
T402
F.B.T
CHECK
ALL THE POINTS
THEN CHANGE
IC701
CHECK
Q402
COLLECTOR
D406
D403
IC701
NORMAL: 5V
RESET: 0V
12V
CHECK
12V LINE
Q706
RESET
IF #26 NORMAL
& NO OUTPUT AT
#23 THEN
CHANGE IC501
CHECK TP7
(MAIN B+
LINE)
103V
DC
16
12
42
36
LC864616A
PWR
CONTROL
KEY
KEY OPERATE?
CHECK DIODE
D701 & SWITCH
KEY BOARD
OPEN LOAD
THEN CHECK
#42 ON STATE
4 ~5V
Q701
POWER
CONTROL
T801
R808
CHECK
LEAD
SOLDERING
L801
LINE FILTER
CHECK
F801
125V 4A
Q802
REGULATOR
5V
SHOULD
BE
4.3V-5.2V
