Sony Walkman WM-FX251 User manual

SERVICE MANUAL
CORRECTION-1
Correct your service manual as shown below.
WM-FX251
US Model
Canadian Model
AEP Model
E Model
Page INCORRECT CORRECT
Ref. No. Part No. Description Remark
101 3-013-560-11 BELT
167 3-014-709-01 SPRING (FR LEVER OW)
168 X-3372-959-1 CHASSIS COMP ASSY (GL-O)
Ref. No. Part No. Description Remark
22
!: indicates corrected portion.
Sony Corporation
Personal A&V Products Company
97L0590-1
Printed in Japan © 1997. 12
Published by Quality Engineering Dept.
(Shibaura)9-923-168-91
101 3-938-627-11 BELT
167 3-933-324-01 SPRING (FR LEVER)
168 X-3371-589-1 CHASSIS ASSY
$
$
$
23
(RPC-97011)

SERVICE MANUAL
WM-FX251
SUPPLEMENT-1
File this supplement with the service manual.
US Model
Canadian Model
AEP Model
E Model
Subject:Change of motor (M901)
•NEW / FORMER DISCRIMINATION
The direction of clamp screw holes is different.(Service manual see page 22, 27)
Mounting shape to the mechanism deck and to the exterior cabinet is not compatible.
Therefore, if the service of the set concerned requires the motor to be replaced, make
sure the shape of motor following the identification method shown below, then replace
it with the same type motor.
Ref. No. Part No. Description Remark
clamp screw hole
clamp screw hole
clamp screw hole
clamp screw hole
FORMER NEW
Ref. No. Part No. Description Remark
M901 1-698-839-11MOTOR (CAPSTAN/REEL)
Sony Corporation
Personal A&V Products Company
98G0583-1
Printed in Japan © 1998. 7
Published by Quality Engineering Dept.
(Shibaura)9-923-168-81
M901 1-763-073-11MOTOR (CAPSTAN/REEL)
(ENG-98005)
Ver 1.0 1998.07

– 2 – – 3 –
WM-FX251
SERVICE MANUAL
US Model
Canadian Model
AEP Model
E Model
SUPPLEMENT-2
File this supplement with the service manual.
Subject:Change of Main Board (Except East European Model)
(ENG-98009)
•New/FormerType Discrimination
[MAIN BOARD] (Conductor Side)
Former Type : 1-663-023-13
New Type : 1-667-170-14
1. ELECTRICAL ADJUSTMENTS
!: Indicates changed portion.
Page FormerType NewType
8
FMTuning Voltage Adjustment
( ): East European model
digital voltmete
r
+
–
  
MAIN board
(VT)
(GND)
FM TUNING VOLTAGE ADJUSTMENT
Adjust for a 9.0 (14.5 ± 0.5)Vdc reading on digital voltmeter
L3
108 MHz
+0.5
0
FMTuning Voltage Adjustment
digital voltmete
r
+
–
  
MAIN board
(VT)
(GND)
FM TUNING VOLTAGE ADJUSTMENT
Adjust for a 9.0 – 9.2 Vdc reading on digital voltmeter
L3
108 MHz
AMTuningVoltage Adjustment
AM TUNING VOLTAGE ADJUSTMENT
Adjust for a 1.4 ± 0.1 Vdc reading on digital voltmeter
L4
530 (531) kHz
( ): Except US, Canadian model
digital voltmete
r
+
–
  
MAIN board
(VT)
(GND)
AM Tuning Voltage Adjustment
AM TUNING VOLTAGE ADJUSTMENT
Adjust for a 1.0 – 1.1 Vdc reading on digital voltmeter
L4
530 (531) kHz
( ): Except US, Canadian model
digital voltmete
r
+
–
  
MAIN board
(VT)
(GND)
#
#
2. DIAGRAMS
•IC Block Diagram
IC1 TA2111F- (EL)
Ver 1.0 1998. 11