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Sharp SX76NF200 User Manual

Sharp SX76NF200
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1
SX76NF200
WARNING
The chassis in this receiver is partially hot. Use an isolation transformer between the line cord plug and power
receptacle, when servicing this chassis. To prevent electric shock, do not remove cover. No user – serviceable
parts inside. Refer servicing to qualified service personnel.
SERVICE MANUAL
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.
MODEL
SX76NF200
SHARP CORPORATION
COLOUR TELEVISION
Chassis No. GE-3A
Page
CONTENTS
» SPECIFICATIONS .............................................2
» IMPORTANT SERVICE NOTES........................ 2
» ADJUSTMENT PRECAUTIONS........................ 3
» TROUBLE SHOOTING FLOWCHART.............. 9
» WAVEFORMS .................................................. 13
» CHASSIS LAYOUT .......................................... 16
» BLOCK DIAGRAM ........................................... 18
» DESCRIPTION OF SCHEMATIC DIAGRAM .. 26
» SCHEMATIC DIAGRAM
Ë
CRT UNIT..................................................... 27
Ë
MAIN UNIT ................................................... 28
Ë
LED UNIT ..................................................... 35
Ë
KEY UNIT ..................................................... 35
Ë
POWER UNIT .............................................. 36
Ë
IP UNIT......................................................... 38
Ë
CONTROL UNIT .......................................... 40
Page
» PRINTED WIRING BOARD ASSEMBLIES ..... 42
» REPLACEMENT PARTS LIST
Ë
ELECTRICAL PARTS
MAIN UNIT ................................................... 52
POWER UNIT .............................................. 57
CRT UNIT..................................................... 60
IP UNIT......................................................... 61
CONTROL UNIT .......................................... 63
LED UNIT ..................................................... 63
KEY UNIT ..................................................... 63
Ë
MISCELLANEOUS PARTS .......................... 64
Ë
SUPPLIED ACCESSORIES.........................64
Ë
PACKING PARTS......................................... 64
Ë
CABINET PARTS ......................................... 64
Ë
CABINET PARTS LOCATION ...................... 64
» PACKING OF THE SET................................... 65
FEATURES
Ë
Full Auto Channel Preset and Auto Channel Skip
Ë
100 CH Program Memory
Ë
CATV (Hyper Band) Ready
<Used Frequency Synthesizer Tuner>
Ë
High Contrast Picture
Ë
TELETEXT(10 page)
Ë
ON Timer / OFF Timer / Reminder
Ë
Picture in Picture / Twin Screen
Ë
Blue Back Noise Mute
Ë
White Temperature Adjustment
Ë
100Hz SCAN / Progressive SCAN
Ë
Headphone Terminal
Ë
Stereo (NICAM / A2) Decoder
Ë
Rotation adjustment (picture tilt adjustment)
Ë
Component Input Terminal
S34Q9SX76NF20

Questions and Answers:

Sharp SX76NF200 Specifications

General IconGeneral
BrandSharp
ModelSX76NF200
CategoryTV
LanguageEnglish

Summary

SERVICE MANUAL

FEATURES

Lists the key features of the Colour Television.

CONTENTS

Provides an overview of the manual's sections and their page numbers.

SPECIFICATIONS

IMPORTANT SERVICE NOTES

Safety precautions for servicing high voltage systems and the picture tube.

X-RAY

Precautions to minimize X-ray radiation exposure during servicing.

BEFORE RETURNING THE RECEIVER

Safety checks to perform before returning the serviced TV to the user.

ADJUSTMENT PRECAUTIONS

Entering service mode

Instructions on how to enter the TV's service mode using different methods.

Service mode menu

Explains how to navigate and use the service mode menu for adjustments.

About "Reset TV-set"

Information on resetting the TV set and its effect on adjustment data.

Changing the NVM data

Details on how to input and modify Non-Volatile Memory (NVM) data.

Service Mode MENU

Vertical Geometry

Adjustment points for vertical picture geometry settings.

Horizontal Geometry

Adjustment points for horizontal picture geometry settings.

Tube Measurement (1)

Measurements related to tube characteristics, including cutoff settings.

Tube Measurement (2)

Further measurements related to tube characteristics, including OSD shift.

Tube Measurement (3)

Additional tube measurements, covering IBRM, CUT_DIS, CUT_GAIN, etc.

BCL and SVM

Adjustments for Brightness/Contrast Limit (BCL) and Sound/Video (SVM).

EHT

Adjustments related to the Extra High Tension (EHT) circuit.

Additional Settings

Settings for IF AGC, Auto AGC, and Rotation adjustments.

NVM Edit

Menu option for editing Non-Volatile Memory data.

Reset TV-set

Menu option to reset the TV set to default settings.

PIF ADJUSTMENT

Adjustment procedure for the Picture Intermediate Frequency (PIF).

CUT OFF, BKGD ADJUSTMENT

Adjustments for CRT cutoff and background settings.

WHITE BALANCE BACKGROUND

Adjustment for white balance and background colour temperature.

CUT OFF, BKGD ADJUSTMENT CONTINUED

Max Beam Check

Procedure to check the maximum beam current for the CRT.

SUB-CONTRAST (SUB-CONT)

Adjustment of sub-contrast for picture brightness and contrast.

SUB-BRIGHTNESS (SUB BRI)

Adjustment of sub-brightness for picture brightness levels.

PAL CHROMA ADJUSTMENT

Adjusting chroma settings for PAL colour system signals.

NTSC CHROMA ADJUSTMENT

Adjusting chroma settings for NTSC colour system signals.

HORIZONTAL, VERTICAL, DEFLECTION LOOP ADJUSTMENT

Adjustments for horizontal, vertical, and deflection loop parameters.

HORIZONTAL, VERTICAL, DEFLECTION LOOP ADJUSTMENT CONTINUED

TRAPEZE

Adjustment for horizontal trapezoidal distortion.

CUSHION

Adjustment for horizontal cushion distortion.

CORNER AMPLITUDE

Adjustment for the amplitude of picture corners.

CORNER AMPLITUDE (SIXTH)

Adjustment for the sixth harmonic of corner amplitude.

ANGLE

Adjustment for picture angle or tilt.

BOW

Adjustment for horizontal bow distortion.

S CORRECTION

Adjustment for S-correction, affecting vertical linearity.

FOCUS ADJUSTMENT

Procedure for adjusting picture focus for sharpness.

PROTECTOR OPERATION CHECKING

Checks for the operation of protective circuits.

A/V INPUT AND OUTPUT CHECKING

Checking the audio/video input and output signals.

FUNCTION OPERATION CHECKING (1) (VIDEO & AUDIO)

CONTRAST

Checking the contrast adjustment effect.

COLOUR

Checking the colour saturation adjustment effect.

BRIGHTNESS

Checking the brightness adjustment effect.

SHARPNESS

Checking the sharpness adjustment effect.

TINT

Checking the tint adjustment effect.

POWER SAVE

Checking the power save feature and LED indicator.

WHITE TEMP

Checking the white temperature option.

NORMAL

Details on normal settings for picture modes.

CHECKING FUNCTION OPERATION (2) (VIDEO & AUDIO) CONTINUED

Continued checks for video and audio function operations.

COLOUR SYSTEM

Checking colour system compatibility and proper operation.

SOUND SYSTEM

Checking sound system compatibility and proper operation.

VOLUME

Checking the volume adjustment effect.

BALANCE

Checking the left-to-right balance effect.

BASS

Checking the bass adjustment effect.

CHECKING FUNCTION OPERATION (2) (VIDEO & AUDIO) CONTINUED

TREBLE

Checking the treble adjustment effect.

SUPER BASS

Checking the super bass adjustment effect.

VOLUME Headphone

Checking headphone volume adjustment.

CHECKING FUNCTION OPERATION (WIDE MODE)

Procedures for checking operation in wide mode.

WIDE MODE

Checking wide mode changes (Panorama, Full, etc.).

V-SIZE

Checking the vertical size effect in wide mode.

V-SCROLL

Checking the vertical scroll effect in wide mode.

CHECKING FUNCTION OPERATION (Twin Screen, PinP)

Procedures for checking Twin Screen and Picture-in-Picture functions.

Twin Screen

Checking twin screen picture quality and colour level.

Pin P

Checking Picture-in-Picture picture quality, size, and position.

Pout P

Checking Picture-in-Picture quality and position.

FREEZE

Checking live and freeze picture functions.

CH-SCAN

Checking multi-picture display via channel scan.

CHECKING FUNCTION OPERATION (TEXT MODE)

Procedures for checking TEXT mode functions.

TEXT

Checking TEXT mode switching (Teletext, Mixed, Off).

TEXT key

Checking specific TEXT key functions (Half page, Hold, etc.).

CHECKING FUNCTION OPERATION (AV MODE)

Procedures for checking AV mode functions.

AV MODE key

Checking AV mode switching (Standard, Movie, Music, News).

TROUBLE SHOOTING FLOWCHART

NO PICTURE

Flowchart for diagnosing and resolving "No Picture" issues.

TROUBLE SHOOTING FLOWCHART

NO SOUND

Flowchart for diagnosing and resolving "No Sound" issues.

TROUBLE SHOOTING FLOWCHART

NO FUNCTION (NO SOUND AND NO PICTURE)

Flowchart for diagnosing combined "No Sound" and "No Picture" faults.

TROUBLE SHOOTING FLOWCHART

NO VERTICAL SCAN

Flowchart for diagnosing and resolving "No Vertical Scan" problems.

WAVEFORMS

Pin1 Vp-p= 1.6 V

Oscilloscope waveform at Pin 1, showing peak-to-peak voltage.

Pin2 Vp-p= 1.6 V

Oscilloscope waveform at Pin 2, showing peak-to-peak voltage.

Pin3 Vp-p= 1.6 V

Oscilloscope waveform at Pin 3, showing peak-to-peak voltage.

Pin4 Vp-p= 100 V

Oscilloscope waveform at Pin 4, showing peak-to-peak voltage.

Pin5 Vp-p= 140 V

Oscilloscope waveform at Pin 5, showing peak-to-peak voltage.

Pin6 Vp-p= 125 V

Oscilloscope waveform at Pin 6, showing peak-to-peak voltage.

Pin7 Vp-p= 8.4 V

Oscilloscope waveform at Pin 7, showing peak-to-peak voltage.

Pin8 Vp-p= 200 V

Oscilloscope waveform at Pin 8, showing peak-to-peak voltage.

Pin9 Vp-p= 1250 V

Oscilloscope waveform at Pin 9, showing peak-to-peak voltage.

Pin10 Vp-p= 8.2 V

Oscilloscope waveform at Pin 10, showing peak-to-peak voltage.

Pin11 Vp-p= 1.6 V

Oscilloscope waveform at Pin 11, showing peak-to-peak voltage.

Pin12 Vp-p= 1 V

Oscilloscope waveform at Pin 12, showing peak-to-peak voltage.

WAVEFORMS

Pin13 Vp-p= 3.8 V

Oscilloscope waveform at Pin 13, showing peak-to-peak voltage.

Pin14 Vp-p= 48 V

Oscilloscope waveform at Pin 14, showing peak-to-peak voltage.

Pin15 Vp-p= 4 V

Oscilloscope waveform at Pin 15, showing peak-to-peak voltage.

Pin16 Vp-p= 5.2 V

Oscilloscope waveform at Pin 16, showing peak-to-peak voltage.

Pin17 Vp-p= 0.4 V

Oscilloscope waveform at Pin 17, showing peak-to-peak voltage.

Pin18 Vp-p= 12 V

Oscilloscope waveform at Pin 18, showing peak-to-peak voltage.

Pin19 Vp-p= 0.4 V

Oscilloscope waveform at Pin 19, showing peak-to-peak voltage.

Pin20 Vp-p= 12 V

Oscilloscope waveform at Pin 20, showing peak-to-peak voltage.

Pin21 Vp-p= 0.2 V

Oscilloscope waveform at Pin 21, showing peak-to-peak voltage.

Pin22 Vp-p= 2 V

Oscilloscope waveform at Pin 22, showing peak-to-peak voltage.

Pin23 Vp-p= 1 V

Oscilloscope waveform at Pin 23, showing peak-to-peak voltage.

Pin24 Vp-p= 1 V

Oscilloscope waveform at Pin 24, showing peak-to-peak voltage.

WAVEFORMS

Pin25 Vp-p= 1 V

Oscilloscope waveform at Pin 25, showing peak-to-peak voltage.

Pin26 Vp-p= 520 V

Oscilloscope waveform at Pin 26, showing peak-to-peak voltage.

Pin27 Vp-p= 480 V

Oscilloscope waveform at Pin 27, showing peak-to-peak voltage.

CHASSIS LAYOUT

SCHEMATIC DIAGRAM

PWB-C CRT UNIT

Schematic diagram for the CRT unit board.

PWB-E CONTROL UNIT

Schematic diagram for the Control unit board.

BLOCK DIAGRAM

PWB-A MAIN UNIT

Block diagram illustrating the functional connections of the Main Unit PWB-A.

BLOCK DIAGRAM

PWB-A MAIN UNIT

Continued block diagram for the Main Unit PWB-A.

PWB-B POWER UNIT

PWB-B POWER UNIT (Wiring side)

Wiring diagram of the Power Unit board (PWB-B).

PWB-A

EW AMP

Section of PWB-A related to the EW Amplifier.

SIDE PIN BUFFER

Section of PWB-A related to the Side Pin Buffer.

SIDE PIN OUT

Section of PWB-A related to the Side Pin Output.

PWB-D IP UNIT

PWB-D IP UNIT

PWB-C CRT UNIT

PWB-E CONTROL UNIT

PWB-F LED UNIT

PWB-F: LED UNIT (Wiring side)

Schematic diagram for the LED Unit board (PWB-F).

PWB-H KEY UNIT

PWB-H: KEY UNIT (Wiring side)

Schematic diagram for the Key Unit board (PWB-H).

DESCRIPTION OF SCHEMATIC DIAGRAM

SAFETY NOTES

Important safety instructions related to AC plug and heat sinks.

IMPORTANT SAFETY NOTICE

Notice regarding the importance of replacing specific parts for safety.

SERVICE PRECAUTION

Precautionary measure involving an isolating transformer for AC mains voltage.

NOTES

General notes on units of resistance, wattage, and capacitors.

VOLTAGE MEASUREMENT CONDITIONS

Conditions under which voltage measurements are performed.

WAVEFORM MEASUREMENT CONDITIONS

Conditions for measuring waveforms using a generator and voltmeter.

SCHEMATIC DIAGRAM

CRT UNIT

Schematic diagram for the CRT Unit.

MAIN UNIT-1/4

PWB-A MAIN UNIT

Part 1 of the schematic for the Main Unit PWB-A.

PWB-A MAIN UNIT

PWB-A MAIN UNIT

PWB-A MAIN UNIT

PWB-A MAIN UNIT

PWB-A MAIN UNIT

PWB-A MAIN UNIT

LED UNIT

PWB-F: LED UNIT (Wiring side)

Wiring diagram for the LED Unit board (PWB-F).

KEY UNIT

PWB-H: KEY UNIT (Wiring side)

Wiring diagram for the Key Unit board (PWB-H).

POWER UNIT

PWB-B: POWER UNIT (Wiring side)

Wiring diagram for the Power Unit board (PWB-B).

PWB-B: POWER UNIT (Wiring side)

IP UNIT

PWB-D: IP UNIT (A side)

Component layout diagram for the IP Unit (PWB-D), A side.

PWB-D: IP UNIT (A side)

PWB-D: IP UNIT (B Side)

Component layout diagram for the IP Unit (PWB-D), B side.

CONTROL UNIT

PWB-E: CONTROL UNIT (Wiring side)

Wiring diagram for the Control Unit board (PWB-E).

PWB-E: CONTROL UNIT (Wiring side)

PRINTED WIRING BOARD ASSEMBLIES

PWB-A: MAIN UNIT (Wiring side)

Wiring layout of the Main Unit PWB-A, showing component placement.

PWB-A: MAIN UNIT (Wiring side)

PWB-A: MAIN UNIT (Chip Parts Side)

PWB-A: MAIN UNIT (Chip Parts Side)

PWB-B: POWER UNIT (Wiring side)

PWB-B: POWER UNIT (Wiring side)

PWB-C: CRT UNIT (Wiring side)

PWB-D: IP UNIT (A side)

PWB-D: IP UNIT (B Side)

Wiring layout of the IP Unit PWB-D, B side.

PWB-E: CONTROL UNIT (Wiring side)

PWB-F: LED UNIT (Wiring side)

PWB-H: KEY UNIT (Wiring side)

REPLACEMENT PARTS LIST

PARTS REPLACEMENT

Information on safety-related parts and general part replacement.

"HOW TO ORDER REPLACEMENT PARTS"

Instructions for ordering replacement parts correctly and promptly.

TUNERS

List of replacement tuner parts.

INTEGRATED CIRCUITS

List of replacement integrated circuit parts.

TRANSISTORS

List of replacement transistor parts.

PRINTED WIRING BOARD ASSEMBLIES (NOT REPLACEMENT ITEM)

List of printed wiring board assemblies, marked as non-replaceable.

REPLACEMENT PARTS LIST

DIODES

List of replacement diode parts.

PACKAGED CIRCUITS

List of replacement packaged circuit parts.

COILS

List of replacement coil parts.

CAPACITORS

List of replacement capacitor parts.

REPLACEMENT PARTS LIST

CAPACITORS

Continuation of the list of replacement capacitor parts.

REPLACEMENT PARTS LIST

CAPACITORS

Continuation of the list of replacement capacitor parts.

RESISTORS

List of replacement resistor parts.

REPLACEMENT PARTS LIST

RESISTORS

Continuation of the list of replacement resistor parts.

REPLACEMENT PARTS LIST

RESISTORS

Continuation of the list of replacement resistor parts.

BALUNES

List of replacement balun parts.

MISCELLANEOUS PARTS

List of miscellaneous replacement parts.

REPLACEMENT PARTS LIST

DIODES

List of replacement diode parts.

PACKAGED CIRCUIT

List of replacement packaged circuit parts.

COILS

List of replacement coil parts.

CAPACITORS

List of replacement capacitor parts.

REPLACEMENT PARTS LIST

RESISTORS

List of replacement resistor parts.

BALUNES

List of replacement balun parts.

MISCELLANEOUS PARTS

List of miscellaneous replacement parts.

REPLACEMENT PARTS LIST

TRANSISTORS

List of replacement transistor parts.

DIODES

List of replacement diode parts.

PACKAGED CIRCUIT

List of replacement packaged circuit parts.

CAPACITORS

List of replacement capacitor parts.

REPLACEMENT PARTS LIST

RESISTORS

List of replacement resistor parts.

PACKAGED CIRCUITS

List of replacement packaged circuit parts.

COILS

List of replacement coil parts.

CAPACITORS

List of replacement capacitor parts.

REPLACEMENT PARTS LIST

RESISTORS

List of replacement resistor parts.

BALUNES

List of replacement balun parts.

MISCELLANEOUS PARTS

List of miscellaneous replacement parts.

REPLACEMENT PARTS LIST

MISCELLANEOUS PARTS

List of miscellaneous replacement parts.

DIODES

List of replacement diode parts.

RESISTORS

List of replacement resistor parts.

SWITCH

List of replacement switch parts.

BALUNES

List of replacement balun parts.

MISCELLANEOUS PARTS

CABINET PARTS

Diagram showing the location of cabinet parts.

CABINET PARTS LOCATION

Diagram showing the location of cabinet parts.

PACKING OF THE SET

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