Sharp GF-4646 User Manual

SHARP SERVICE MANUAL #!I
OUTSTANDING RECEPTION THE WORLD OVER
ATSM682082RCS
.(PHOTO: GF-4646)
GENERAL
Power source:
(GF-4646)
(GF-4646A)
Speakers:
Output power:
(GF-4646)
Output power:
(GF-4646A)
Semiconductors:
Dimensions: Width;
Depth;
Height;
Weight:
GF-4646
GF-4646A
In the interests of user-safety the set should be
restored to its original condition and only parts
identical to those specified be used.
For the mechanical adjustment, refer to the RD-
620/A Service Manual already issued.
SPECIFICATIONS
AC 120V 60Hz
DC 9V (“D” type x 6)
AC 240V 50/60 Hz
DC 9V (UM/SUM-1 type x 6)
10 cm (4”) woofer x 2
Ceramic type tweeter x 2
MPO; 3.9W (1.95W + 1.95W)
(AC operation)
PMPO; IOW (5W + 5W)
(AC operation)
MPO; 7.2W (3.6 + 3.6W) (AC
operation)
TAPE RECORDER
Tape:
Compact cassette tape
Frequency response:
50Hz - 10,OOOHz
Signal/noise ratio: 45dB
Input sensitivity and impedance:
External mic.; 600 ohms
Loaded impedance:
Headphones; 8 ohms - 25 ohms
RADIO
Frequency range: FM; 87.6 MHz - 108 MHz
AM; 525 kHz - 1,605 kHz
RMS; 4.6W (2.3 + 2.3W) (DC
operation, 10% distortion)
5 ICS
4 transistors
11 diodes
2 LEDs
426mm (16-3/4”)
96mm (3-3/4”)
‘212mm (8-3/8”)
2.8 kg (6.1 tbs.) without batteries
Specifications for this model are subject to change without
prior notice.
SHARP CORPORATION
SHARP ELECTRONICS CORPORATION

Sharp GF-4646 Specifications

General

Brand	Sharp
Model	GF-4646
Category	Portable Stereo System
Language	English

Summary

General Specifications

Power, Speakers, and Physical Details

Details on power sources, speaker types, output power, semiconductors, dimensions, and weight.

Tape Recorder and Radio Performance

Specifications for tape recorder frequency response and radio reception ranges.

Component Identification

Names of Parts and Diagrams

Lists and illustrates all external and internal components of the unit.

AC Power Supply Cords

Details the specific AC power supply cords for GF-4646 and GF-4646A models.

Disassembly and Dial Cord Stringing

Disassembly Procedures

Steps for removing the front cabinet, mechanism block, main and power P.W.B.s.

Dial Cord Stringing Instructions

Instructions for correctly stringing the dial cord for the tuning mechanism.

Mechanical Alignment Procedures

Head Azimuth Adjustment

Procedure for adjusting the record/playback head azimuth for optimal output.

General Alignment Instructions

General guidelines for aligning the unit's receiver circuits.

AM IF/RF Alignment Steps

Detailed steps for aligning the AM Intermediate Frequency and Radio Frequency stages.

FM Alignment and Notes

FM IF/RF Alignment

Steps for aligning the FM Intermediate Frequency and Radio Frequency stages.

FM Stereo Alignment

Procedure for aligning the FM stereo reception circuitry.

Schematic Diagram Notes

Explanations and conventions used in the schematic diagrams.

Replacement Parts List

Electronic Components List

Lists integrated circuits, transistors, diodes, coils, transformers, filters, controls, capacitors, and resistors.

Mechanical and Miscellaneous Parts

Lists mechanical parts, screws, springs, mechanism components, and miscellaneous items.

Accessories and Documentation

Lists AC power cords, packing materials, operation manuals, and other documentation.

Component Diagrams and Company Information

Integrated Circuit and Transistor Diagrams

Pinout diagrams for key integrated circuits and transistors used in the unit.

Sharp Corporation Contact Information

Executive, regional, and parts center addresses for Sharp Corporation.