Sony SRF-H11 (serv.man2) Service Manual ▷ View online
5
SRF-H11
SECTION 3
DISASSEMBLY
Note : Follow the disassembly procedure in the numerical order given.
3-1. BELT REMOVAL
3-2. DRIVER (HEADPHONE) (R) REMOVAL
r
The equipment can be removed using the following procedure.
Belt
Set
DRIVER (Headphone) (R)
Main board
DRIVER (Headphone) (L)
Audio board
Belt
1
Claws
1
Claws
3
Claws
4
Tapping screw (B1.7x8)
4
Tapping screw
(B1.7x8)
Cap (L)
Hook (L)
Cap (R)
3
Claws
Hook (R)
Lead wire
2
2
Main (L) assy
Main (R) assy
Driver
(headphone)
(headphone)
Main (R) assy
5
Remve solder
2
screw
(+BVTP1.7x 6)
1
Ear pad (R)
3
4
3-3. DRIVER (HEADPHONE) (L) REMOVAL
Driver
(headphone)
(headphone)
Main (L) assy
5
Remve solder
2
screw
(+BVTP1.7 x 6)
1
Ear pad (L)
3
4
6
SRF-H11
3-4. MAIN BOARD REMOVAL
3-5. AUDIO BOARD REMOVAL
Main board
Cabinet (front) R
Cabinet (rear) R
4
Remve solder
1
Three screws
(+BVTT1.7 x 8)
2
Claw
2
Claw
3
5
Audio board
Cabinet (front) L
Cabinet (rear) L
5
Remve solder
3
Screw
(+BVTT1.7 x 8)
3
Two screws
(+BVTT1.7 x 8)
Lid,
battery case
battery case
1
Knob
(volume)
4
2
6
7
SRF-H11
SECTION 4
Gear (tuning capacitor) installation
Note : Follow the installation procedure in the numerical order given.
1 Turn the PVC shaft all the way counterclockwise.
2 Set the gear (VC) onto the PVC shaft and secure it with screw.
2 Set the gear (VC) onto the PVC shaft and secure it with screw.
PVC shaft
Gear (VC)
2
Screw
(1.7 x 3)
Main board
1
8
SRF-H11
TUNER SECTION
• POWER switch
: ON
• VOL
: MAX
AM Section
BAND switch
: AM
FM Section
BAND switch
: FM
SECTION 5
ELECTRICAL ADJUSTMENTS
AM RF signal
generator
generator
30% amplitude modulation by 400Hz
signal.
Output level : as low as possible
signal.
Output level : as low as possible
Put the lead-wire
antenna close to
the set.
antenna close to
the set.
FM RF signal
generator
generator
22.5kHz frequency deviation
by 400Hz signal.
Output level : as low as possible
by 400Hz signal.
Output level : as low as possible
FM WIRE
ANTENNA input
ANTENNA input
0.01 F
µ
set
16Ω
speaker output
level meter
AM FREQUENCY COVERAGE ADJUSTMENT
Adjust for a maximum reading on level meter.
L5
520kHz
CT1-3
1,650kHz
AM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L7
620kHz
CT1-4
1,400kHz
FM FREQUENCY COVERAGE ADJUSTMENT
Adjust for a maximum reading on level meter.
L8
86.5MHz
CT1-1
109.5MHz
FM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L3
86.5MHz
CT1-2
109.5MHz
• Repeat the procedures in each adjustment several times, and the
frequency coverage and tracking adjustments should be finally
done by the trimmer capacitors.
done by the trimmer capacitors.
Adjustment Location : MAIN board (See page 10)
0 dB=1µ V
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