Sony Walkman WM-EX170 Service Manual

WM-EX170/EX172
SECTION 5
DIAGRAMS
5-1. BLOCK DIAGRAM
— 7 — — 8 —
IC301
28
L
R
29
32
35
RV301
VOLUME
HP901
PLAYBACK
HEAD
M901
REEL/CAPSTAN
MOTOR
34
24 18
15
23
4
11
13
5
10
19
36
1
8
4
LIMIT
NORMAL
PRE + POWER AMP
IC331
DOLBY NR
IC601
MOTOR DRIVE
MAIN BOARD
J302
J301
DC IN 3V
PHONES
S305
AVLS
D150
BATT
S302
(POWER)
17
15
14
4U
W
IN+
13
S/S
V
VREF
5
6
21 22
3
7
RV601
TAPE SPEED
S303
NORM
VREF
PRE
OUT2
L
MIX IN 2L
MIX
OUT L
MIX
OUT R
PWR
IN2 L
PWR
IN1 R
HP IN 2L
MIX IN 1R
HP IN 1R
PRE
OUT1
R
VREF
25
6
RV351
HIGH
RV352
LOW
S351
MEGA BASS
OFF – ON
14
VREFVREF
S352
DOLBY NR
ON – OFF
S351
MEGA BASS
OFF – ON
VREF
M.B
ON/OFF
LOW
BOOST
GAIN
COM
VCC
AVLS
PWR
OUT
1(R)
PWR
OUT
2(L)
MEGA BASS UNIT MEGA BASS UNIT
EX170 MODELEX172 MODEL
26
(TAPE SELECTOR)
CrO
2 /METAL
EX172 MODEL
EX170 MODEL
EX170
MODEL
EX170
MODEL
IN L
IN R
OUT L
OUT R
20
DRY BATTERY
SIZE "AA"
(IEC DESIGNATION R6)
2PCS, 3V
ON/OFF
• Signal path.
E : PB

Sony Walkman WM-EX170 Specifications

General

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