Sony WM-EX402 Service Manual page 9

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• IC Block Diagrams
IC301 LA4585M-TLM
27
26
25 24 23 22
PRE2
28
REV (L)
REV (R)
29
FWD (R)
30
FWD (L)
31
REF
32
REF
33
R.F
RIPPLE
MIX.1
MIX OUT (L)
34
MIX OUT (R)
35
36
PWR IN (R)
REF
DET
1
2
3
IC601 MM1370XVBE
20
19
18 17 16 15
OUTPUT
BIAS
CIRCUIT
CURRENT
CONTROL
FORWARD/REVERSE
SELECT SWITCH
3
1 2
21 20
19
PRE1
REF
REF
LOW
BOOST
MIX.2
REF
DET
SYS.
REF
CONT
PWR.1
PWR.2
PWR.C
4
5
6
7
8
9
14 13
12
11
ERROR AMP
START-UP •
OSCILLATION
VELOCITY
CIRCUIT
CONTROL
START-UP
START-UP
CONTROL
LOGIC
CIRCUIT
PHASE SELECT
CIRCUIT
PRE DRIVER
4
5
6
7
8
9
10
IC302 NJM2185AV-TE2
14
13 12
18
MIX IN (R)
17
HP IN (R)
CIRCUIT
16
LP1
15
L.B.GAIN
14
M.B.ON/OFF
1
LP2
13
12
DET1
11
FWD/REV
10
PRE MUTE
– 14 –
11
10 9
G2
G1
SUM
WEIGHT
Gm
BIAS
Ach BLOCK
Bch BLOCK (same Ach)
2
3
4
5
6
8
V/I
7

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