Read Panasonic BM-ET300A / BM-ET300AE Service Manual online
Q1
R4
39
R25
220
R3
47
R26
3.3k
R13
0.
1
C24
1mF
6.3V
D2
E2
2
1
2
1
C25
330uF
10V
C11
0.01uF
C6
3.3mF50V
C7
0.01uF
D8
C13
0.1uF
C1
0.68uF
CN2
1
2
3
3
4
5
6
7
8
7V
5.6V
3.3V
1.8V
GND
GND
GND
GND
Q4
1
2
3
4
L21
CN1
1
AC24 +12
2
3
AC24 GND
R7
220
AGND
R10
OPEN
L1
2.1uH
R12
0.
1
D7
1
2
3
D21
R6
100k
R23
10k
R5
8. 2
8. 2
C10
470pF
D3
C15
0.01uF
0.01uF
R15
39
VS2
L2
2.1uH
2.1uH
C14
220pF
D22
IC1
1
Compensation
2
Voltage_Feedback
3
Current_Sense
4
RT/CT
5
Gnd
6
OUT
7
VCC
8
Vref
R22
2.2k
T1
1
2
3
4
7
5
6
8
9
10
R14
100
L23
R8
1k
1k
C12C12
120uF120uF
16V16V
D23
R24
OPEN
F1
C29
330uF
10V
Z1
R21
47
D6
VS1
C23
1mF
6.3V
IC2
1
REF
2
A
3
K
D1
L22
C8
56uF25V
C27
680uF
6.3V
L24
R11
1.2k
C9
0.01uF
R9
10k
D5
C28
1uF
Q2
D
S
G
C21
680uF
10
V
Q3
R28
1k
C2
0.1uF
1
4
2
3
C22
1.2mF
10V
DGND
R27
1k
E1
C26
680uF
6.3V
C5
3.3mF50V
D24
D4
R2
10k
C3
0.01uF
0.01uF
C4
0.01uF
0.01uF
T1
POWER
TRANSFORMER
POWER
TRANSFORMER
POWER BOARD
1
2
3
4
5
6
A
B
C
D
Important safety notice
Components Identified by " " mark have special characteristics for safety.
When replacing any of these components, use only manufacturer's specified parts.
When replacing any of these components, use only manufacturer's specified parts.
< INDEX >
POWER BOARD
POWER BOARD
IC1
B4/C4
IC2
A5/A6
Q1
C3
Q2
C4
Q3
B3
Q4
B5
D1
D3
D2
D3
D3
D3
D4
C3
D5
C3
D6
C4
D7
C3
D8
C4
D21
D5
D22
C5
D23
C5
D24
C5
TO
TERMINAL
BOARD
. . . . . . CN1
TO
MAIN BOARD
. . . . . . . CN6
MAIN BOARD
. . . . . . . CN6
– 4-5 –
SCHEMATIC DIAGRAM OF POWER BOARD
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