19
1.2 Charger board
（
Long backup time model
）
:
Item
Checked components
DVM function
Reference Value
Fail Condition
1 F1
Ω
0
Ω
open
(E,C)
Ω
≈
1M
Ω
short
2
Q301
Q105
(G,E)
Ω
10k
Ω
short or open
3 D303 DIODE
≈
0.4V
0V
4 R315
Ω
10
Ω
open
5 R319
Ω
1k
Ω
open
6 D106 DIODE
≈
0.4V
0V
7
R112 , R159
Ω
10
Ω
open
(A,K)
Ω
≈
1M
Ω
short
8 Q04
(G,K)
Ω
≈
12
Ω
short
9
R320, R321, R322,
R340,R339, R341
Ω
≈
0.5/6
Ω
open
2. PSDR board
2.1 SCR part:
Item
Checked components
DVM Function
Reference Value
Fail Condition
1 F301,
F302
Ω
0
Ω
open
(A, K)
Ω
≈
1.4M
Ω
short
2
Q301
Q302
(G, K)
Ω
≈
10
Ω
short
2.2 Boost part:
Item
Checked components
DVM Function
Reference Value
Fail Condition
(E, C)
Ω
≈
800k
Ω
short
1
Q306, Q308
、
Q310
Q307, Q309
、
Q311
(G, E)
Ω
15.8k
Ω
short or open
2 D308,
D310 DIODE
≈
0.35V
0V
3
R325, R331, R334, R342
、
R337
、
R328
Ω
10
Ω
open
4
R390, R388, R389
、
R393
、
R392
、
R391
Ω
2.2
Ω
open
4
D302, D304, D306, D303
、
D305
、
D307
DIODE
≈
12
Ω
open
2.3 Battery boost part:
