SRF-FQ9 - Sony Audio Service Manual (repair manual)

Model: SRF-FQ9
Pages: 10
Size: 185.29 KB
Type: PDF
Document: Service Manual
Brand: Sony
Device: Audio
File: srf-fq9.pdf
Date: 2018-11-20

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MICROFILM
SERVICE MANUAL
FM STEREO/AM RADIO
US Model
Canadian Model
E Model
SPECIFICATIONS
SRF-FQ9

Notes on chip component replacement
• Never reuse a disconnected chip component.
• Notice that the minus side of a tantalum capacitor may
be damaged by heat.
Ver 1.0  1998. 08

– 2 –
SECTION  1
GENERAL
This section is extracted from
instruction manual.

– 3 –
MAIN BOARD
DIAL  POINTER  SETTING
Note:
 Follow the disassembly procedure in the numerical order given.
SECTION  2
DISASSEMBLY
Note:
 Follow the assembly procedure in the numerical order given.
1
two screws
(P2 
×
 8)
4
main board
2
four claws
3
cabinet (rear)
2
two claws
5
cabinet (front)
pointer
1
Mount the pointer as 
shown in the figure 
A
.
4
main board
cabinet (front)
3
Turn CV1 fully in the 
arrow direction.
2
Mount the knob (TUNE) 
as shown in the figure 
B
.
knob (TUNE)

fig. 
B

fig. 
A

– 4 –
SECTION  3
ELECTRICAL  ADJUSTMENTS
AM  FREQUENCY  COVERAGE  ADJUSTMENT
Adjust for a maximum reading on level meter.
L3
520 kHz
CT3
1750 kMHz
AM  TRACKING  ADJUSTMENT
Adjust for a maximum reading on level meter.
L5
600 kHz
CT4
1400 kHz
FM  FREQUENCY  COVERAGE  ADJUSTMENT
Adjust for a maximum reading on level meter.
L6
86.5 MHz
CT1
109.5 MHz
FM  TRACKING  ADJUSTMENT
Adjust for a maximum reading on level meter.
L1
86.5 MHz
CT2
109.5 MHz
AM Section

Setting:
BAND switch: AM
FM Section

Setting:
BAND switch: FM
• Repeat the procedures in each adjustment several times, and the
frequency coverage and tracking adjustments should be finally
done by the timmer capacitors.
AM RF signal
generator
Put the lead-wire
antenna close to 
the set.
30% amplitude modulation
by 400 Hz signal
Output level: as low as posible
FM RF signal
generator
22.5 kHz frequency deviation
by 400 Hz signal.
Output level: as low as possible
0.01 
µ
F
TP (RF IN)
set
headphone jack ( 
2
)
level meter
24 
Ω
+
–
2nd OSC Adjustment

Setting:
BAND switch: FM

Procedure:
1. Connect the frequency counter to TP (OSC).
2. Adjust L2 for 56.75 MHz reading on the frequency counter.

Specification: 56.5 MHz to 57.0 MHz
Connection:
FM STEREO (38 kHz) Adjustment

Setting:
BAND switch: FM

Procedure:
1. Connect 10 µF Capacitor to TP (38 kHz) and TP (GND).
2. Connect the frequency counter to TP (VCO).
3. Adjust L4 for 38 kHz reading on the frequency counter.
4. Disconnect 10 µF Capacitor in step 1.

Specification: 37.95 kHz to 38.05 kHz
Connection:
frequency counter
1 
µ
F/50 V
TP (OSC) (IC1 PIN 
@¢
)
+
+
–
IC1
TP
(GND)
TP
(38 kHz)
+
10 
µ
F
– Conductor Side –
frequency counter
1 
µ
F/50 V
TP (VCO) (IC1 PIN 
!ª
)
+
+
–

Display

Download Sony SRF-FQ9 Service Manual (Repair Manual)

Here you can read online and download Sony SRF-FQ9 Service Manual in PDF. SRF-FQ9 service manual will guide through the process and help you recover, restore, fix, disassemble and repair Sony SRF-FQ9 Audio. Information contained in service manuals typically includes schematics / circuit diagrams, wiring diagrams, block diagrams, printed wiring boards, exploded views, parts list, disassembly / assembly, pcb.

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