88
Installation and Maintenance
Service Manual
18K
Test1
Test2
Test3
Test4
Test5
E
G
I
H
F
D
B
A
C
L
Test9
Test6
K
J
Tset7
M
N
Test11
Test10
Test8
S
T
Test12
1. Key detection point
Test NO
Test point
Corresponding component
7HVWYDOXHXQGHUQRUPDO
condition
Test 1
Between A and C
1HXWUDODQGOLYHZLUHV
160V~265V
Test 2
Between B and C
1HXWUDODQGOLYHZLUHV
160V~265V
Test 3
Between D and E
'&EXVEDUHOHFWURO\WLFFDSDFLWRU
DC 180V~380V
Test 4
Between F and G
Electrolytic capacitor of power
DC 180V~380V
Test 5
Two ends of diode D15
',30PRGXODU9SRZHUVXSSO\
DC 14.5V~15.6V
Test 6
Two ends of electrolytic
capacitor C715
&9SRZHUVXSSO\
DC 12V~13V
Test 7
Two ends of electrolytic
capacitor C710
&9SRZHUVXSSO\
DC 5V
Test 8
Two ends of electrolytic
capacitor C226
&9SRZHUVXSSO\
DC 3.3V
Test 9
7ZRHQGVRIFKLSFDSDFLWRU
C912
&9SRZHUVXSSO\
DC 15V~18V
Test 10
Between M to GND
3RLQW0RI5WRJURXQGVLJQDOVHQGLQJSRUWRI2'8
)OXFWXDWHEHWZHHQa9
Test 11
Between N to GND
3RLQW1RI5WRJURXQGVLJQDOUHFHLYLQJSRUWRI2'8
)OXFWXDWHEHWZHHQa9
Test 12
Between S and T
3RZHUVXSSO\RIFRPPXQLFDWLRQULQJ
DC 56V
