Sony WM-FX251

– 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/Former Type Discrimination
[MAIN BOARD] (Conductor Side)
Former Type : 1-663-023-13
New Type : 1-667-170-14
1. ELECTRICAL ADJUSTMENTS
! : Indicates changed portion.
Page Former Type New Type
8
FM Tuning 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
FM Tuning 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
AM Tuning Voltage 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