Sony SRF-HM01V Service Manual ▷ View online
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
SRF-HM01V
9
9
SECTION 4
DIAGRAMS
4-1.
BLOCK DIAGRAM – TUNER Section –
14
LPF1
21
MODE1
22
MODE2
52
BAND1
53
BAND2
50
MONO/ST
38
OSC IN
23
OSC OUT
40
D0
13
16
MPX IN
12
DET OUT
AF
AMP
8
FM IF IN
10
AM IF IN
AM
DET
AM IF
AMP
FM IF
AMP
FM
DET
4
FM MIX
2
FM RF IN
1
TV RF IN
FM/TV
MIX
24
TV/FM OSC
30
TV RF OUT
29
FM RF OUT
D1
TV
TRACKING
CT1
L5
TV/FM
OSC
L2
FM RF
D4
D5
D2
CT2
FM TRACKING
CT2, L2
B. P. F.
BPF1
AM BAND
SWITCHING
Q2
FM WIRE
ANTTENA
TUNER
B+
TV/WB/FM
SENS
S1
LOCAL
DX
27
AM RF IN
AM RF
BUFFER
Q5
30
AM BAND
AM BAND
SWITCHING
Q6, 7
LOW-PASS
FILTER
Q301, 302
L3
AM FERRITE-ROD
ANTTENA
AM TRACKING
CT3, L3
D3
L4
AM OSC
AM VCO VOLTAGE
L4
BUFFER
AM
MIX
5
AM MIX
25
AM OSC
OSC
OSC
CF3
450kHz
CF2
10.7MHz
FM/AM/TV
POWER
SWITCH
FM
MPX
MONO/ST
SWITCHING
Q4
AM BAND
SWITCHING
Q3
15
BUFFER
Q8
11
QUAD
CF4
10.7MHz
SIGNAL PATH
: FM/TV (2
−
6ch)
: TV (7
−
13ch) /WEATHER
: AM
LOUT
ROUT
A
FM/TV FRONT-END,
FM/AM IF AMP,
FM MPX
IC1
SYSTEM CONTROLLER
IC301 (1/2)
LOUT
ROUT
TV/FM/WB
RF AMP
Q1
(Page 10)
DX/LOCAL
SWITCHING
Q9
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