Sony ICF-7800 Service Manual

ICF-7800
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FM/AM
3-BAND
RECEIVER
SPECIFICATIONS
Power
Requirements:
6V
dc,
four
batteries
size
AA
Outputs:
Earphone
(minijack)
............
1
(IEC
Designation
R6)
Recording
(minijack)............
1
240V
ac,
50Hz
with
optional
AC
MPX
OUT
(minijack)
...........
1
Adaptor & Charger AC-15
(for UK model)
110V or 220V ac, 50/60 Hz with
optional AC Power Pack AC-456C
(for AEP model)
220—240V ac (100 or 110—127V
adjustable), 50/60 Hz with optional
AC Adaptor & Charger AC-4W
(for © model)
12V car battery with Sony Car Battery
Cord DCC-127H (optional)
Approximate Dimensions:
Power Consumption: 6VA with the AC-15
8.5VA at 50Hz with the AC-456C
6.5VA at 60Hz with the AC-456C
9VA at 50Hz with the AC-4W
9VA at 60Hz with the AC-4wW
Frequency Range: FM 87.5—108 MHz
SW 3.9—12MHz (77-25 m)
MW 530—1,605 kHz
including projecting parts and controls
Weight: Approx. 780g, 1lb 12 0z
including batteries
Aerials: FM telescopic antenna
FM/SW telescopic antenna
MW built-in ferrite-rod antenna
Speaker: Approx. 7.7cm (3 inches) dia.
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Sony ICF-7800 Specifications

General

Tuning System	Analog
FM Frequency Range	87.5 - 108 MHz
Battery Type	4 x AA
Headphone Jack	Yes
Bands	FM, SW
SW Frequency Range	3.9 MHz
Power Source	AC and Battery
Speaker	Built-in
Antenna	Telescopic

Summary

ICF-7800 Specifications

Power Requirements and Consumption

Details power sources, consumption, and adapter compatibility.

Frequency Range and Aerials

Lists supported radio bands and antenna types.

SECTION 1 OUTLINE

1-1. Block Diagram Overview

SECTION 1 CIRCUIT DESCRIPTION

Electronic Timer Functionality

Explains the operation and components of the built-in timer.

SECTION 1 CIRCUIT DESCRIPTION (Continued)

SECTION 2 DIAL FILM CALIBRATION

Dial Film Calibration Steps

SECTION 3 ADJUSTMENTS - FM

FM Section Alignment Procedures

Procedures for tuning FM section IF and tracking.

SECTION 3 ADJUSTMENTS - FM (Continued)

FM Frequency Coverage Tuning

Fine-tuning FM bands for accurate reception.

SECTION 3 ADJUSTMENTS - AM

AM Section Alignment Procedures

Procedures for tuning AM section IF and tracking.

SECTION 3 ADJUSTMENTS - AM (Continued)

AM Frequency Coverage Tuning

Fine-tuning AM bands for accurate reception.

Timer Adjustment and Calibration

Setting and calibrating the timer function for operation.

SECTION 3 ADJUSTMENTS - TIMER

Timer Adjustment Verification

Detailed steps for verifying timer calibration accuracy.

SECTION 4 DIAGRAMS - SCHEMATIC

Schematic Diagram Overview

SECTION 4 DIAGRAMS - SCHEMATIC (Continued)

Detailed Schematic Component View

SECTION 6 ELECTRICAL PARTS LIST

Semiconductor and Capacitor List

SECTION 6 ELECTRICAL PARTS LIST (Continued)

Resistors, Switches, and Jacks List