Read Sony ICF-C273 Service Manual online
ICF-C273
2
TABLE OF CONTENTS
Specifications ........................................................................... 1
1. GENERAL
Location and Function of Controls .................................... 3
2. DISASSEMBLY
2-1. Switch Board, Cabinet (Upper) .................................. 6
2-2. Alarm Board, jog Board .............................................. 7
2-3. Main Board ................................................................. 7
2-4. Trans Board ................................................................ 8
2-2. Alarm Board, jog Board .............................................. 7
2-3. Main Board ................................................................. 7
2-4. Trans Board ................................................................ 8
3. ELECTRICAL ADJUSTMENTS
............................. 9
4. DIAGRAMS
4-1.IC Block Diagrams ..................................................... 11
4-2.Block Diagrams ......................................................... 12
4-3. Printed Wiring Board –Main section (1/2)– ............. 13
4-4. Printed Wiring Board –Main section (2/2)– ............. 14
4-5. Schematic Diagram –Main section (1/2)– ................ 15
4-6. Schematic Diagram –Main section (2/2)– ................ 16
4-2.Block Diagrams ......................................................... 12
4-3. Printed Wiring Board –Main section (1/2)– ............. 13
4-4. Printed Wiring Board –Main section (2/2)– ............. 14
4-5. Schematic Diagram –Main section (1/2)– ................ 15
4-6. Schematic Diagram –Main section (2/2)– ................ 16
5. EXPLODED VIEW
5-1.Cabinet (Upper) Section ............................................ 17
5-2.Cabinet (Lower) section ............................................ 18
5-2.Cabinet (Lower) section ............................................ 18
6. ELECTRICAL PARTS LIST
................................... 19
SAFETY-RELATED COMPONENT WARNING!!
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 PARTS WHOSE
PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR IN
SUPPLEMENTS PUBLISHED BY SONY.
REPLACE THESE COMPONENTS WITH SONY PARTS WHOSE
PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR IN
SUPPLEMENTS PUBLISHED BY SONY.
• HOW TO CHANGE THE CERAMIC FILTER
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.
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
CF3
CF2
no mark
blue
orange
black
white
10.70MHz
10.67MHz
10.73MHz
10.64MHz
10.76MHz
Mark
Center
frequency
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