Sony ICF C112 Service Manual
ICF-C112
SERVICE MANUAL
Ver 1.0 2003. 03
SPECIFICATIONS
Time display:
12-hour system
Frequency range:
FM: 87.5 - 108 MHz
AM: 530 - 1710 kHz
Speaker:
Approx. 6.6 cm (2 5/8 inches) dia., 8 ohm
Power output:
120 mW (at 10% harmonic distortion)
Power requirements:
120 V AC, 60 Hz
For the power backup function: 9 V DC, one 6F22 battery
Battery life:
Approx. 14 hours, using Sony 006P (6F22) battery
Dimensions:
Approx. 135 × 100 × 130 mm (w/h/d)
3/8 × 4 × 5 1/8 inches) incl. projecting parts and controls
(5
Mass:
Approx. 570 g (1 lb 4 oz) not incl. battery
Design and specifications are subject to change without notice.
E Model
9-877-123-01
2003C0400-1
© 2003. 03
FM/AM CLOCK RADIO
Sony Corporation
Personal Audio Company
Published by Sony Engineering Corporation
1
ICF-C112
Notes on Chip Component Replacement
• Never reuse a disconnected chip component.
• Notice that the minus side of a tantalum capacitor may be dam-
aged by heat.
TABLE OF CONTENTS
1. SERVICING NOTES
1-1. Cord Dressing (Power Cord)............................................... 3
1-2. Pointer Alignment ............................................................... 3
2. GENERAL
Installing the Battery ............................................................... 4
Setting the Clock ..................................................................... 4
Operating the Radio................................................................. 4
Setting the Alarm..................................................................... 4
Setting the Sleep Timer ........................................................... 4
3. DISASSEMBLY
3-1. Panel (Front)........................................................................5
3-2. Cabinet (Upper) Single Assy...............................................6
3-3. Main Board Section ............................................................ 6
3-4. Main Board, LED101, Switch Board .................................. 7
4. ELECTRICAL ADJUSTMENTS................................... 8
5. DIAGRAMS
5-1. Block Diagram .................................................................. 11
5-2. Printed Wiring Boards ....................................................... 12
5-3. Schematic Diagram ........................................................... 13
5-4. IC Block Diagrams............................................................ 14
6. EXPLODED VIEWS
6-1. Cabinet (Upper) Section.................................................... 15
6-2. Main Board Section .......................................................... 16
7. ELECTRICAL PARTS LIST ........................................ 17
SAFETY-RELATED COMPONENT W ARNING!!
COMPONENTS IDENTIFIED BY MARK 0 OR DOTTED LINE
WITH MARK 0 ON THE SCHEMATIC DIAGRAMS AND IN
THE PARTS LIST ARE CRITICAL TO SAFE OPERATION.
REPLACE THESE COMPONENTS WITH SONY P ARTS WHOSE
PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR
IN SUPPLEMENTS PUBLISHED BY SONY.
2
1-1. CORD DRESSING
d
(POWER CORD)
1) Set the power cord as shown in the figure.
2) Mount the chassis with power cord retainer
board and screws (P 3 × 10).
Note: Tighten completely the screws (P 3 × 10).
ICF-C112
SECTION 1
SERVICING NOTES
screw P 3x10
power cord retainer boar
power cord
1-2. POINTER ALIGNMENT
1
pointer
6
P 3x10
2
knob (tuning)
chassis
5
MAIN board
4
3
3
ICF-C112
SECTION 2
GENERAL
This section is extracted
from instruction manual.
4
SECTION 3
DISASSEMBLY
Note : This set can be disassemble according to the following sequence.
SET
3-1. PANEL (FRONT)
(Page 5)
3-2. CABINET (UPPER) SINGLE ASSY
(Page 6)
3-3. MAIN BOARD SECTION
(Page 6)
3-4. MAIN BOARD, LED101, SWITCH BOARD
(Page 7)
ICF-C112
Note : Follow the disassembly procedure in the numerical order given.
3-1. P ANEL (FRONT)
claws
2
3
panel (front)
claws
1
P 2.6x8
5
ICF-C112
y
3-2. CABINET (UPPER) SINGLE ASSY
3
cabinet (upper) single ass
4
3-3. MAIN BOARD SECTION
2
P 3x30
1
Removal the solders.
2
CN1
1
P 3x30
3
P 3x10
4
MAIN board section
6
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