Sony WM-FX483 - IC301 LA4585 M; IC331 NJM2185 V; IC601 MM1370

— 12 —
IC601 MM1370
20 19 18 17 16 15 14 13 12
7 8 1096541 2
3
11
OUTPUT
BIAS
CIRCUIT
CURRENT
CONTROL
VELOCITY
CONTROL
START-UP •
OSCILLATION
CIRCUIT
START-UP
CONTROL
CIRCUIT
ERROR AMP
PHASE SELECT
CIRCUIT
PRE DRIVER
START-UP
LOGIC
FORWARD/REVERSE
SELECT SWITCH
GND-2 FC RI OUT VSP IN+ VREF STAR
T
COM OSC
PU
VCC
DR
U
V
W
P-GND
PV
PW
GND-1
IC301 LA4585M
28 18
29
17
16
15
14
13
12
10
8 9
11
30
31
32
33
34
35
36
25 24 23 222627 21 20
R.F
REF
REF
REF
REF
19
REF
REF
LOW
BOOST
SYS.
CONT
DET
DET
MIX.2
MIX.1
6 74 5321
PWR.C
PWR.1
PWR.2
MIX IN (R)
HP IN (R)
LP1
L.B.GAIN
M.B.ON/OFF
LP2
DET1
FWD/REV
PWR IN (R)
MIX OUT (R)
MIX OUT (L)
RIPPLE
REF
FWD (L)
FWD (R)
REV (R)
REV (L)
NF (L) NF (R) MIX IN (L) HP IN (L) SW OUT (L) SW OUT (R) PRE OUT (L) PRE OUT (R) PRE GND
PRE MUTE
POWER MUTE
PWR OUT (R)
VCC
COM
PWR GND
PWR OUT (L)
AVLS
DET2
PWR IN (L)
PRE2 PRE1
IC331 NJM2185V
14 13 12 11 10 9 8
4321 5 6 7
WEIGHT
G2 G1 V/I
BIAS
CIRCUIT
Bch BLOCK (same Ach)
VCC ON/OFF VEXT INR OUTR DCR DETR
GND IREF
VREF
INL
O
UTL
DCL
DETL
SUM
Gm
Ach BLOCK