Sony SRF-HM01V Service Manual ▷ View online
SRF-HM01V
4
• This set can be disassembled in the order shown below.
2-1.
DISASSEMBLY FLOW
SECTION 2
DISASSEMBLY
Note:
Follow the disassembly procedure in the numerical order given.
2-2.
MICROCOMPUTER BOARD
2-2. Microcomputer
Board
(Page 4)
2-4. Battery
Board
(Page 5)
2-3. MAIN Board
(Page 5)
2-5 . Putting the Sheet (A)
(Page 6)
SET
5
rubber key switch
4
MICROCOMPUTER board
2
cabinet (front) (R) assy
3
claw
3
claw
1
four screws
(1.7
(1.7
×
10)
SRF-HM01V
5
2-3.
MAIN BOARD
2-4.
BATTERY BOARD
3
MAIN Board
2
claw
2
claw
lever (A)
S1
1
Remove nine solders.
Note: When installing MAIN board,
fit lever (A) and switch (S1).
1
four screws
(1.7
(1.7
×
10)
4
claw
3
Remove eleven solders.
Note: When installing BATTERY board,
fit lever (A) and switch (S401).
5
BATTERY board
2
front cabinet (L) assy
4
claw
lever (A)
S401
SRF-HM01V
6
2-5.
PUTTING THE SHEET (A)
Put the sheet (A) positioning its corner to the corner of C26
in the main board so that the pin of CF2 is completely covered.
in the main board so that the pin of CF2 is completely covered.
C26
CF2
IC
main board
7
SRF-HM01V
SECTION 3
ELECTRICAL ADJUSTMENTS
AM VCO VOLTAGE ADJUSTMENT
Adjustment Part
Frequency Display
Reading on Digital Voltmeter
L4
530 kHz
1.30
±
0.05 V
Confirmation
1710 kHz
8.10
±
1.00 V
AM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter
L3
590 kHz
CT3
1490 kHz
FM VCO VOLTAGE ADJUSTMENT
Adjustment Part
Frequency Display
Reading on Digital Voltmeter
Confirmation
TV 2ch (59.75 MHz)
1.91
±
0.50 V
Confirmation
108.0 MHz
11.70
±
1.00 V
FM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter
L2
TV 2ch (59.75 MHz)
CT2
108.0 MHz
TV VCO VOLTAGE ADJUSTMENT
Adjustment Part
Frequency Display
Reading on Digital Voltmeter
Confirmation
WEATHER 2ch
3.00
±
0.50 V
(162.4 MHz)
Confirmation
TV 13ch
8.10
±
1.00 V
(215.75 MHz)
TV TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter
CT1
TV 10ch (197.75 MHz)
0 dB=1
µ
V
[AM]
Setting:
BAND: AM
BAND: AM
[FM/TV]
Setting:
BAND: FM, TV or WEATHER
BAND: FM, TV or WEATHER
• Repeat the procedures in each adjustment several times for a
maximum reading on level meter.
• Remove FM wire antenna in FM adjsutments.
Adjustment Location:
AM RF signal
generator
30% amplitude
modulation by
400 Hz signal
Output level: as low as possible
modulation by
400 Hz signal
Output level: as low as possible
Put the lead-wire
antenna close to
the set.
antenna close to
the set.
+
–
–
level meter
set
16
Ω
headphone
FM RF signal
generator
22.5 kHz frequency
deviation by 400 Hz
signal
Output level: as low as possible
deviation by 400 Hz
signal
Output level: as low as possible
+
–
–
level meter
headphone
set
16
Ω
0.01
µ
F
TP (ANT)
+
–
–
digital voltmeter
MAIN board
TP (VT)
TP (GND)
– MAIN Board (Conductor Side) –
TP
(ANT)
TP
(GND)
TP
(VT)
IC201
CT1
TV Tracking
Adjustment
TV Tracking
Adjustment
L4
AM VCO Voltage Adjustment
AM VCO Voltage Adjustment
L3
CT3
CT3
AM Tracking Adjustment
L2
CT2
CT2
FM Tracking Adjustment