Sony icf m 770 ls service manual
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Extracted text from sony icf m 770 ls service manual (Ocr-read)
Page 2
ICF-M770L/M77OS/M77OSL
TABLE OF CONTENTS
1. SERVICING NOTE ................................................. 2
2. GENERAL .................................................................. 3
3. DISASSEMBLY
3-1 Disassentbly Flow 4
3-2 Cabinet Rear Assy 4
373. Chassis Assy. 5
3-4 MAIN Board 5
4. ELECTRICAL ADJUSTMENTS ........................ 6
. DIAGRAMS
57]. Block Diagram ............................................................... S
572. Note for Primed Wiring Boards and
Schematic Diagrams ....................................................... 9
573. Primed Wiring Boards
7 MAIN/JACK/POWER/INLET Boards 7 .................... 10
574. Schematic Diagram
7 MAIN/JACK/POWER/INLET Boards 7 11
575. Primed Wiring Board 7 KEY Board 7 12
576. Schematic Diagram 7 KEY Board 7 . I3
577. IC Pin Function Description .......................................... l4
6. EXPLODED VIEWS
6-1. Cabinet (From) Section .. 15
672. Cabinet (Rear) Section 16
673. Chassis Section ............................................................... l7
7. ELECTRICAL PARTS LIST .............................. 18
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.
SAFETY-RELATED COMPONENT WARNING !!
COMPONENTS IDENTIFIED BY MARK A OR DOTTED
LINE WITH MARK A 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 PUB-
LISHED BY SONY.
SECTION 1
SERVICING NOTE
HOW TO CHANGED THE CERAMIC FILTERS
This model is used two ceramic filters of CFZ and CF3.
You must use same type of color marked ceramic filters in order to
meet same specifications.
Therefore, the ceramic filter must be changed two pieces together
since its supply two pieces in one package as a spare parts.
Mark Center frequency
CF2
red 10.70 MHz
mark
blue 10.67 MHz
orange 10.73 MHz
CF3
black 10.64 MHz
white 10.76 MHz