Sony SRF-DR2000 Service Manual ▷ View online
– 5 –
– 6 –
SECTION 2
DISASSEMBLY
Note :
Follow the disassembly procedure in the numerical order given.
2-1. CABINET (REAR) REMOVAL
2-2. MAIN BOARD REMOVAL
r
The equipment can be removed using the following procedure.
Cabinet (Rear)
MICOM board, LCD1
Main board
Set
2
Screws (1.7x10)
1
3
4
5
6
7
8
Cabinet (Rear)
Cabinet (Front)
Lid, battery case
Claws
Claws
5
Removal solder
1
3
4
2
Claws
Claw
Main board
– 7 –
2-3. MICOM BOARD, LCD1 REMOVAL
3
4
2
Claw
MICOM board
Claws
Cabinet (Front)
1
Screws (1.7x5)
8
9
0
!¡
5
6
7
MICOM board
Holder (LCD)
LCD1
– 8 –
Adjustments Location :
SECTION 3
ELECTRICAL ADJUSTMENTS
FM Section
Setting :
VOLUME
: Maximum
1. Connect a capacitor (10
µ
F) between pin 1 of IC403 and ground.
2. Adjust RV401 for 76.2kHz – 75.8kHz reading on the frequency
counter.
• Repeat the procedures in each adjustment several times, and the
tracking adjustments should be finally the trimmer capacitors.
FM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
CT402
98.0MHz
FM VCO Adjustment
Procedure :
FM RF signal
generator
generator
TP FM IN
(BPF401
(BPF401
1
pin)
22.5kHz frequency
deviation by 400Hz signal.
Output level :
as low as possible
deviation by 400Hz signal.
Output level :
as low as possible
0.01 F
µ
set
16
Ω
phones jack
level meter
T401 : FM IF Alignment
RV401 : VCO Adjustment
CT402 : FM Tracking Adjustment
[MAIN BOARD]
(Side A)
(Side A)
IC403
RV401
1
5
6
10
R418
R428
76K
0.01
µ
F
1pF
10
µ
F
DC5V
2.4k
Ω
1M
Ω
S
2SK193-E
Servicing tool
frequency counter
[MAIN BOARD] (Side A)
FM IF ALIGNMENT
Adjust for a maximum reading on level meter.
T401
10.7MHz
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