Sony SRF-H11 Service Manual page 9

FM 2nd OSC Adjustment
Procedure :
1. Turn the set to optional frequency.
2. Connect an electrolytic capacitor (10µF/16V) between pin !¡
of IC1 and ground.
3. Connect the frequency counter to @¢ pin and GND of IC1 as
shown the figure below.
4. Adjust L4 for 56.5 – 57.0MHz reading on the frequency
counter.
(SIDE A)
MAIN BOARD
10 µF/16V
FERRITE-BAR
ANTENNA
C25
C28
Q1
15 10
BCE
R8
IC1
C26
C15
16 20
C29
C14
C30
C9
C11
L6
frequency counter
1 µ F
Adjustment Location : MAIN board (See page 10)
L7
AM
R4
C19
C31
C22 C17
L8
C18
5 1
25 30
R3
L3
L4
R2
C1
C6
-1 -2
L5
FM VCO Adjustment
Procedure :
FM RF signal
generator
Carrier frequency : 98MHz
Modulation : no modulation
Output level : 1mV (60dB)
1. Connect an electrolytic capacitor (10µF/16V) between pin !¡
of IC1 and ground.
2. Connect the frequency counter to !ª pin and GND of IC1 as
shown the figure below.
3. Turn the set to 98MHz.
4. Adjust L6 for 37.95 – 38.05kHz reading on the frequency
counter.
(SIDE A)
MAIN BOARD
10 µF/16V
C25
C28
Q1
15
BCE
R8
C26
C15
16
C29
C14
C30
C9
C11
L6
frequency counter
1 µ F
Adjustment Location : MAIN board (See page 10)
SRF-H11
SRF-H11
SRF-H11
FM
WIRE ANTENNA
input
0.01µF
set
L7
AM
FERRITE-BAR
ANTENNA
R4
C19
C31
C22 C17
L8
C18
10 5 1
IC1
20 25 30
R3
L3
L4
R2
C1
C6
-1 -2
L5
FM
wire antenna
input
9