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6. SMPS
DC 5V is not output.
YES
Is [U6503 : TOP267EG] dam-
Replace the [U6503 :
aged?
TOP267EG] and [D6503].
NO
YES
Is the fuse [F70] functioning
Is [U6503(TPO267EG), D6503,
properly?
C6506] damaged?
NO
YES
Are there any short circuits
Repair the short circuited area
caused by the soldering on
on the PCB.
the PCB?
NO
YES
Are any parts damaged?
Check the damaged parts.
Operation waveform for each part
YES
Replace the damaged part.
YES
Replace the damaged part.
94
A
After primary side rectification
(Caution: High voltage, electric shock)
(Caution: High voltage, electric shock)
C6512 0.01/250V
R6511
2.2M
(2.2M)
3
1
Europe/China=OPEN
D6503
R6512
D3SB60
2.2M
(2.2M)
C6511
0.01/250V
Z6503
HEATSINK
44741010600AS
D6526
1SR154
D6510
UDZSTE-1730B
U6503
R6514
TOP267EG
56K
7
1
D
V
C 3
S
X
F
5
2
4
R6516
6.8
C6515
47/25
D6507
UDZS6.8B
Q6501
RK7002B
R6534
D
1
OPEN
G
2
3
S
SMPS unit
A
(Unloaded)
A
Set
B
Primary drain
C
After secondary rectifications
R6513
22
Z6516
C6532
3X10_CBTS(S)-Z
R6550
C6536
OPEN
4700P
4700P
Z6515
2
1
HEAT_SINK(SMPS)-A
T6501
UNFIX110157Z1
SW_TRANS(STR28L-278)
1
10
D6515
KCQ60A06
11
3
D6527 1N4003
6
D6514
8
7
1N4003
5
C6519
22/50
4
R6523
U6501
3.3K
PC123X2YFZ1B
(1/2)
(2/2)
U6501
PC123X2YFZ1B
C6520
3300P/250V
C6522
OPEN
R6518
OPEN
J6501
SHORT
C6521
R6531
OPEN
OPEN
U6504
PC123X2YFZ1B
FG1
B
C
B
C
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