Bang & Olufsen BeoLab 3500 MKII 1601, Service Manual

Page: 15 / 24

7.
Wiring diagram
Wiring diagram 7. 7. Wiring diagram
SWITCH MODE
POWER SUPPLY
TRANSFORMER LEFT
PLUG PCB
MICRO
COM-
PUTER
NTC
+9V
-9V
GND
BASS R
TREB R
PLIM
PMUTE
PFAIL
A
C
2
1
A
C
2-
1
A
C
2-
1
A
C
2-
1
A
C
2
G
A
C
2
G
A
C
2
G
A
C
2
G
A
C
2
2
A
C
2-
2
A
C
2-
2
A
C
2-
2
A
C
2-
1
A
C
2-
1
A
C
2-
1
A
C
2-
1
A
C
2
G
A
C
2
G
A
C
2
G
A
C
2
G
A
C
2-
2
A
C
2-
2
A
C
2-
2
A
C
2-
2
18V
GND
+9V
-18V
GND
-9V
13V
A
C
A
C
3
2
A
C
3
G
A
C
3
G
13V
A
C
A
C
3
1
13V
A
C
A
C
3
1
A
C
3
G
A
C
3
G
13V
A
C
A
C
3
2
ML?
MCL
SDA SCL GND B
A
S
L
GND TREB
L
PLIM PMUT
E
PF
AI
L
N.C. N.C.
+9
V
-9V
MLL-
MLL+
MLR- MLR+ MCLL- MCLL+ MCLR- MCLR+
ML?
MCL
SDA
SCL
GND
BAS L
GND
TREB L
PLIM
PMUTE
PFAIL
N.C.
N.C.
+9V
-9V
MLL-
MLL+
MLR-
MLR+
PL in R
GND REF
PL in L
GND
+5V ST
.B
Y
GND
-5V ST
.B
Y
GND
B
A
S
L
GND
TREB
L
GND +9V -9
V
PLIM PMUT
E
PF
AI
L
PON
+5V ST.BY
GND
-5V ST.BY
GND
BAS L
GND
TREB L
GND
+9V
-9V
PLIM
PMUTE
PFAIL
PON
M
LR
X
ML
TX
MLD+ MLD- STROBE IRR
X
MUTE TIME
R
PO
N
-5V ST
.B
Y
OE DA
TA
CL
OCK
GND GND
+5
VA
ST
.B
Y
+5V ST
.B
Y
L_LE
V
PMUT
E
L LEV
PFAIL
MLCON
MCLRX
MCLTX
MLRX
MLTX
PLIM
DATA
CLOCK
OE
GND
GND
+5V
TIMER
MUTE
IRRX
STROBE
L LEV
PFAIL
MLCON
MCLRX
MCLTX
MLRX
MLTX
SDA
PLIM
DATA
CLOCK
OE
GND
GND
+5V
TIMER
MUTE
IRRX
STROBE
MLD- MLD+ SP ON
V
ML
8V5 u?15V
V
ML
-8V5 u?-15V
MLL- MLL+ MLR- MLR+ PL in
R
GND REF PL in
L
GNDD PL data
+9V
-9V
GND
BAS L
TREB L
PLIM
PMUTE
PFAIL
REL1
REL2
GND
10V
A
C
1
1
A
C
1
1
A
C
1
1
A
C
1
1
A
C
1
G
A
C
1
G
A
C
1
G
A
C
1
G
A
C
1
2
A
C
1
2
A
C
1
2
A
C
1
2
A
C
1
1
A
C
1
1
A
C
1-
1
A
C
1
1
A
C
1
G
A
C
1
G
A
C
1
G
A
C
1
G
A
C
1
2
A
C
1
2
A
C
1
2
A
C
1-
2
NTC
POWER AMPLIFIER
22
2
20
34
36
POWER AMPLIFIER
22
LF SUPPLY AND CONTROL
31
19
TRANSFORMER RIGHT
21
CROSS FIELD PCB
32
DISPLAY AND IR RECEIVER
35
ST
K
EY
25
25
P1
P2
P25
P8
P3
P4
P23
P24
P21
P22
P20
230VAC
230VAC
230VAC
230VAC
P19
P7
P3
P8
STKEY
NC
STKEY
SDA
NC
P1
P4
P5
P6
P9
P2
P10
230
VA
C
230
VA
C
P11 P12
P14
P13
P17 P18
P15
P16 P2
P1
P3
P4
P8
NC
NC
CP1
20
19 18 17 16 15 14 13 12 11 10
9 8 7 6 5 4 3 2 1
1
2
3
4 1
2
3
4
1 2
12 11 10
9 8 7 6 5 4 3
20
19 18 17 16 15
14
13 12 11 10
9 8 7 6 5 4 3 2 1
1
2
1
2 +
-
-
+
1
2
1
2
3
4
5
6
7
8 8
7
6
5
4
3
2
1
12 11 10
9 8 7
6 5 4
3 2 1
4 3
2 1
4
3 2
1
12 11 10
9 8 7 6 5 4 3 2 1
6 1
6 1
2
3
4
5 5
4
3
2
DC/DC
CONVERTER
1 2 3
4
5 6 7 8
9
10 11 12
1
10
9 8 7 6
5 4
3 2
GND
12
11
10
9
8
7
6
5
4
3
2
1
1
10
9
8
7
6
5
4
3
2
14
13
12
11
10
9
8
7
6
5
4
3
2
1
1
2 3 4 5 6 7 8 9
10 11 12 13 14
1 2 3
11
12 13 14 10
9 8 7 6 5 4
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
22
21
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
12 11 10
9 8 7 6 5 4 3 2 1
1
2
3
4
5
6
7
8
8
7
6
5
4
3
2
1
1
14 13 12 11 10
9 8 7 5 6 4 3 2
1
2
1
2
-
+
+
-
LEFT
RIGHT
3
3 N.C.
N.C.
MAINS
1 2