Sony ICFC-317 Service manual
ICF-C317
SERVICE MANUAL
Ver 1.0 2003.02
SPECIFICATIONS
Time display
12-hour system
Frequency range
Band ICF-C317
FM 87.5-108 MHz
AM 530-1 710 kHz
Speaker
Approx. 6.6 cm (2 5 ⁄ 8 inches) dia. 8 Ω
Power output
120 mW (at 10 % harmonic distortion)
Australian Model
Battery life
Approx. 20 hours using Sony 006P (6F22) battery
DimensionsIndicador de alarma
Approx. 146 x 69.5 x 145 mm (w/h/d)
(5 3 ⁄ 4 x 2 3 ⁄ 4 x 5 3 ⁄ 4 inches) not incl. projecting parts and
controls
Mass
Approx. 556 g (1 lb 3.7 oz) not incl. battery
Design and specifications are subject to change without notice.
Power requirements
230 V AC, 50 Hz
For the power backup function: 9 V DC, one 6F22 battery
9-877-121-01
2003B0200-1
© 2003.02
FM/AM CLOCK RADIO
Sony Corporation
Personal Audio Company
Published by Sony Engineering Corporation
ICF-C317
TABLE OF CONTENTS
Specifications ........................................................................... 1
1. GENERAL
Location and Function of Controls .................................... 3
2. DISASSEMBLY
2-1. Cabinet (Upper) Dual ASSY ...................................... 4
2-2. Dual Assy Main Board ............................................... 4
3. DIAL POINTER INSTALLATION ............................ 5
4. ELECTRICAL ADJUSTMENT ................................. 6
5. DIAGRAMS
5-1. Printed Wiring Boards ................................................ 7
5-2. Schematic Diagram ..................................................... 8
6. EXPLODED VIEW ........................................................ 9
7. ELECTRICAL PARTS LIST .................................... 10
SAFETY CHECK-OUT
After correcting the original service problem, perform the
following safety check before releasing the set to the customer :
Check the antenna terminals, metal trim, “metallized” knobs,
screws, and all other exposed metal parts for AC leakage. Check
leakage as described below.
LEAKAGE TEST
The AC leakage from any exposed metal part to earth ground and
from all exposed metal parts to any exposed metal part having a
return to chassis, must not exceed 0.5mA (500 microampers).
Leakage current can be measured by any one of three methods.
1. A commercial leakage tester, such as the Simpson 229 or RCA
WT-540A. Follow the manufacturers’ instructions to use these
instruments.
2. A battery-operated AC milliammeter. The Data Precision 245
digital multimeter is suitable for this job.
3. Measuring the voltage drop across a resistor by means of a VOM
or battery-operated AC voltmeter. The “limit” indication is 0.75V,
so analog meters must have an accurate low-voltage scale. The
Simpson 250 and Sanwa SH-63Trd are examples of a passive
VOM that is suitable. Nearly all battery operated digital
multimeters that have a 2V AC range are suitable. (See Fig. A)
To Exposed Metal
Parts on Set
0.15 µF
Fig. A. Using an AC voltmeter to check AC leakage.
• HOW TO CHANGE THE CERAMIC FILTER
1.5kΩ
Earth Ground
AC
voltmeter
(0.75V)
This model is used two ceramic filters of CF2 and CF3.
You must use same type of color marked ceramic filters in
order to meet same specifications.
Therefore, the ceramic filter must change two pieces together
since it's supply two pieces in package as a spare parts.
mark
mark
Mark
Center
frequency
red 10.70MHz
CF2
CF3
blue 10.67MHz
orange 10.73MHz
black 10.64MHz
white 10.76MHz
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY MARK ! OR DOTTED LINE WITH
MARK ! ON THE SCHEMATIC DIAGRAMS AND IN THE PARTS
LIST ARE CRITICAL TO SAFE OPERATION.
REPLACE THESE COMPONENTS WITH SONY PARTS WHOSE
PA RT NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR IN
SUPPLEMENTS PUBLISHED BY SONY.
2
LOCATION AND FUNCTION OF CONTROLS
Function selector
ICF-C317
SECTION 1
GENERAL
This section is extracted from
instruction manual.
AC power cord
FM wire antenna
ICF-C317
There is a tactile dot beside volume to show the
direction to turn up the volume.
3
ICF-C317
0
DISASSEMBLY
z
The equipment can be removed using the following procedure.
Transformer board
Cabinet (upper) dual ASSYSet
Main board
SECTION 2
Note : Follow the disassembly procedure in the numerical order given.
2-1. CABINET (UPPER) DUAL ASSY
3
Screw +BTP 2.6x10
Cabinet (upper) dual ASSY
4
Panel (front)
5
Screws
2-2. TRANSFORMER BOARD, MAIN BOARD
3
Screws +BTP 2.6x10
6
Knob (tuning)
6
Transformer board
5
2
Screw +BTP 2.6x10
To speaker
4
1
Screws +BTP 2.6x1
1
Remove solder
Main board
2
Screws +BTP 2.6x10
Retainer board
4
Cabinet (lower)
SECTION 3
DIAL POINTER INSTALLATION
Note : Follow the installation procedure in the numerical order given.
Knob (tuning)
Hole
5
Turn the knob (VOL) to the arrow direction fully
ICF-C317
Pointer
1
4
Install the main board
2
3
CV1
Marking
4
Knob (VOL)
A
Marking portion
of the knob (VOL)
within arrow
marked area,
then attach it
A
2
Turn the shaft of CV1 to the
arrow direction fully
RV1
3
Turn the RV1 to the arrow direction fully
1
Turn the knob (tuning) to the
arrow direction fully
Knob
(tuning)
5
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