Sony Walkman WM-EX170 Service Manual

— 17 —
5-6. IC BLOCK DIAGRAMS
GND
IREF
2
VREF
3
INB
4
OUTB
5
6
7
DCB
DETB
1
V+
SW
13
VEXT
12
INA
OUTA
8
DCA
DETA
BIAS
Circuit
Bch BLOCK
Ach BLOCK
Gm
SUM
(same Ach)
+
–
Weight
+
–
G1G2 V/I
9
1011
14
IC331 NJM2185V
IC601 LB1979V
20
19 18 17 16 15 14 13 12 11
1
2 3 4 5 6 7 8 9 10
CURRENT DETECT
OUTPUT
PRE
DRIVER
MIX
WAVEFORM
DETECT
CURRENT/MOTIVE
LOGIC
SOFT
SW
REFERENCE VOLTAGE
FOR SPEED CONTROL
MOTIVE POWER
DETECT
POWER SUPPLY
BIAS
REFERENCE
VOLTAGE
OSCILLATOR
CIRCUIT
SPEED
DETECT
FC GND FC RI OUT VSP IN+ VREF S/S COM OSC
WB
VCC
NC
U OUT
V OUT
W OUT
P-GND
VB
UB
GND

Sony Walkman WM-EX170 Specifications

General

Brand	Sony
Model	Walkman WM-EX170
Category	Cassette Player
Language	English