Read Sony ICF-704S Service Manual online
2
mark
Center
Frequency
Frequency
red
10.70 MHz
blue
10.67 MHz
orange
10.73 MHz
black
10.64 MHz
white
10.76 MHz
white/white
10.75 MHz
yellow
10.79 MHz
HOW TO CHANGE THE CERAMIC FILTERS
This model is used two ceramic filters of CF2, CF3 and CF4.
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 one 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 one package as a spare parts.
mark
mark
• white/white only
CF2
CF3
CF3
CF4
mark
mark
CF3
CF2
CF4
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.
damaged by heat.
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.
ICF-704S
TABLE OF CONTENTS
1. GENERAL
............................................................................ 3
2. DISASSEMBLY
2-1. Cabinet (Front) Assy ............................................................. 5
2-2. Chassis Section ..................................................................... 5
2-3. Main Board ........................................................................... 6
2-4. Setting the Pointer ................................................................. 6
2-2. Chassis Section ..................................................................... 5
2-3. Main Board ........................................................................... 6
2-4. Setting the Pointer ................................................................. 6
3. ELECTRICAL ADJUSTMENTS
MW Section ............................................................................. 7
SW Section .............................................................................. 7
FM Section .............................................................................. 8
SW Section .............................................................................. 7
FM Section .............................................................................. 8
4. DIAGRAMS
4-1. Note for Printed Wiring Boards and
Schematic Diagrams ............................................................. 9
4-2. Printed Wiring Board – Main Section – .............................. 10
4-3. Printed Wiring Boards – Power Section – ........................... 11
4-4. Schematic Diagram ............................................................. 12
4-3. Printed Wiring Boards – Power Section – ........................... 11
4-4. Schematic Diagram ............................................................. 12
5. EXPLODED VIEWS
5-1. Cabinet (Front) Section ....................................................... 13
5-2. Cabinet (Rear) Section ........................................................ 14
5-2. Cabinet (Rear) Section ........................................................ 14
6. ELECTRICAL PARTS LIST
......................................... 15
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