Sharp 20F630 User Manual

20F630
CU20F630
SHARP CORPORATION
This document has been published to be used for after
sales service only.
The contents are subject to change without notice.
In the interests of user-safety (Required by safety regulations in some countries ) the set should be restored to its
original condition and only parts identical to those specified should be used.
COLOR TELEVISION
Chassis No. GA-2
Page
» ELECTRICAL SPECIFICATIONS .........................................................................................................1
» IMPORTANT SERVICE SAFETY PRECAUTION .................................................................................2
» LOCATION OF USER'S CONTROL .....................................................................................................6
» INSTALLATION AND SERVICE INSTRUCTIONS ................................................................................7
» SERVICE MODE...................................................................................................................................8
» ADJUSTMENT METHOD ...................................................................................................................13
» CHASSIS LAYOUT .............................................................................................................................28
» BLOCK DIAGRAM ..............................................................................................................................30
» DESCRIPTION OF SCHEMATIC DIAGRAM......................................................................................40
» WAVEFORMS .....................................................................................................................................41
» SCHEMATIC DIAGRAMS ...................................................................................................................42
» PRINTED WIRING BOARD ASSEMBLIES ........................................................................................52
» REPLACEMENT PARTS LIST............................................................................................................55
» PACKING OF THE SET ......................................................................................................................62
CONTENTS
SPEAKER
SIZE ...................................................................5 x 12 cm, 2pcs
VOICE COIL IMPEDANCE ............................ 16 ohm at 400 Hz
ANTENNA INPUT IMPEDANCE
VHF/UHF.....................................................75 ohm Unbalanced
TUNING RANGES
VHF-Channels...............................................................2 thru 13
UHF-Channels ............................................................14 thru 69
CATV Channels ...........................................................1 thru 125
(EIA, Channel Plan U.S.A.)
POWER INPUT .....................................................AC 120 V, 60 Hz
POWER RATING .................................................................... 90W
PICTURE SIZE .......................................... 1,239 cm
2
(192sq inch)
CONVERGENCE ............................................................. Magnetic
SWEEP DEFLECTION .................................................... Magnetic
FOCUS ................................................................................. Uni-Bi
INTERMEDIATE FREQUENCIES
Picture IF Carrier Frequency ..................................... 45.75 MHz
Sound IF Carrier Frequency...................................... 41.25 MHz
Color Sub-Carrier Frequency .................................... 42.17 MHz
(Nominal)
AUDIO POWER
OUTPUT RATING ........................................2.5 W(RMS) x 2pcs
Specifications are subject to change without
prior notice.
ELECTRICAL SPECIFICATIONS
MODELS
SERVICE MANUAL
20F630
CU20F630
S52J320U-FS1/
1st Edition

Sharp 20F630 Specifications

General

Brand	Sharp
Model	20F630
Category	TV
Language	English

Summary

ELECTRICAL SPECIFICATIONS

IMPORTANT SERVICE SAFETY PRECAUTION

SERVICING OF HIGH VOLTAGE SYSTEM AND PICTURE TUBE

Precautions for handling high voltage systems and the picture tube during servicing.

BEFORE RETURNING THE RECEIVER (Fire & Shock Hazard)

Safety checks and leakage current test before returning the unit to the user.

SAFETY NOTICE

Importance of using original or equivalent safety-rated replacement parts.

INSTALLATION AND SERVICE INSTRUCTIONS

CIRCUIT PROTECTION

Details the receiver's fuse and circuit protection measures.

X-RADIATION PROTECTOR CIRCUIT TEST

Procedure to test the X-radiation protection circuit after service.

HIGH VOLTAGE CHECK

Verifies high voltage operation within safe design limitations.

SERVICE MODE

Service Mode Overview

Explains how to enter, clear, and navigate service modes.

Adjustment & Setting Modes

SELF ADJUSTMENT

H-VCO Self-Adjustment

Procedure for self-adjusting the Horizontal VCO.

RF-AGC Self-Adjustment

Procedure for self-adjusting the RF-AGC.

PIF-VCO Self-Adjustment

MTS-FILTER Adjustment

ADJUSTMENT METHOD

First Stage Adjustment Data

Second Stage Adjustment Data

Third Stage Adjustment Data

MODEL 20F630 BLOCK DIAGRAM: MAIN Unit

MODEL 20F630 BLOCK DIAGRAM: CRT Unit

MODEL 20F630 BLOCK DIAGRAM: MTS MODULE Unit

MODEL 20F630 SCHEMATIC DIAGRAM: MAIN Unit

PRINTED WIRING BOARD ASSEMBLIES

PARTS LIST

MAJOR COMPONENTS

PASSIVE COMPONENTS