Sony Walkman SRF-S84, Service Manual

Page: 8 / 14

SRF-S84
8 8
CT1
CT2
CT3
CV1
CV2
CV3
C1
C3
C4
L2
C5
CT4
CV4
C6
C7
C8
C9
C10
C11
C24
C25
C26 C27 C28
R6
R7
C29
R8
C35 C36
C37
L7
1
µ
H
1
µ
H
1
µ
H
L9
C38
C39
C40
C41 C42
L1
L10
1
µ
H
C13
C14
R2
C17
C18
L6
R3
C19 C20
C21
C22
R4 C33
C34
R15
R16
C30 C31
C32
C43
C44 R11
Q1
L11
20
µ
H
L3
R10 R9
C23
C12
J1
L8
R1
C16
L4
L5
C2
18p
4.7
16V
100p
3p
1500p
1
0.22
5600p
0.22
0.015
0.47
0.47
0.047 1000p 0.1
150k
150k
1
50V
4.7k
0.1 0.1
100
4V
100
4V
220
4V
0.1
100p 100p
1
2p
1k
100
4V
1
6.8
2.2
35V 4.7
16V
1
10
6.3V
68k 0.47
0.47
0
0
1
50V
10
6.3V
100
4V
22
6.3V
0.1 1k
2SB1218A
100k 100k
1
0.015 220
120p
18p
FM/AM FRONT-END
IF DET,FM MPX
FM IF MUTE DET OUT MPX IN PD1 PD2 ST IND AGC GND +VCC
FM RF
OL AGC
AM OSC
TUN IND
PLL1 PLL2
VCO CONT
R OUT
L OUT
TV 1ST OSC FM 1ST OSC AGC AFC AM RF IN FE GND
FM RF IN
TV RF IN
+VCC FE
IMAGE ADJ
FM 2ND LOCAL
PLL VCO
MUTE
SWITCH
OUT 1
POWER
GND
OUT 2
VCC
POWER SWITCH IN 1 IN 2 REF REF GND
POWER AMP
IC3
IC1
VCC GND
IN 1 IN 2
HP 1 HP 2
LP IN
LP GAIN
LP OUT
OUT 1 OUT 2 DET IN DET IN
IC2
MEGA BASS
AMP
REG
FM ST
FM MONO
AM
S1
BAND
S1-1
S1-2
S2-2
ON
POWER
MEGABASS
OFF
S2
S2-1
FM
TRACKING
TRACKING
AM
FREQUENCY
COVERAGE
FM
AM
FREQUENCY
COVERAGE
FM
2ND OSC
VCO
L4
TUNE
CV1-4
CT3,L5
CT1,L6
CT4,L3
L2 CT2,L1
RV1
DRY BATTERY
REF
CXA1129N-T4
LA3550M-TE-L
LA4535M-TE-L
VOLUME
(IEC DESIGNATION R03)
1PC 1.5V
SIZE"AAA"
5-3. SCHEMATIC DIAGRAM
Note:
• All capacitors are in
µ
F unless otherwise noted. pF:
µµ
F 50 WV or
less are not indicated except for electrolytics and tantalums.
• All resistors are in
Ω
and 1 /
4
W or less unless otherwisespecifed.
• A : B+ Line.
•
H
: adjustment for repair.
• Power voltage is dc 1.5 V and fed with regulated dc power
supply from battery terminal.
• Voltages are dc with respect to ground under no-signal (detuned)
conditions.
no mark : FM
(
) : AM
• Voltages are taken with a VOM (Input impedance 10 M
Ω
).
Voltage variations may be noted due to normal production
tolerances.
• Signal path.
F
: FM
f
: AM