Sanyo VIZZON HT30746 User Manual

AS
FILE NO.
SERVICE MANUAL Remote Control Digital
Color Television
HT30746 (U.S.A.)
(CANADA)
ORIGINAL VERSION
Chassis No. 30746-00
NOTE: Match the Chassis No. on
the unit’s back cover with
the Chassis No. in the
Service Manual.
If the Original Version
Service Manual Chassis
No. does not match the
unit’s, additional Service
Literature is required. You
must refer to “Notices” to the
Original Service Manual
prior to servicing the unit.
Contents
Safety Instructions . . . . . . . . . . . . . . . . . . 2
Service Adjustments . . . . . . . . . . . . 3 – 13
Service Hints . . . . . . . . . . . . . . . . . . . . . . 14
Mechanical Disassemblies. . . . . . . . . . . 15
Chassis Electrical Parts List . . . . . . 16 – 32
Cabinet Parts List . . . . . . . . . . . . . . . . . . 33
Component and Test Point
Locations . . . . . . . . . . . . . . . . . . . 34 – 41
Block Diagrams. . . . . . . . . . . . . . . . 42 – 47
Troubleshooting Flow Charts . . . . . 48 – 50
Control Port Function . . . . . . . . . . . 51 – 52
Schematic Inserts . . . . . . . . . . . . . . 53 – 64
Schematic Notes . . . . . . . . . . . . . 53 – 54
Pin Layouts. . . . . . . . . . . . . . . . . . 53 – 54
Capacitor and Resistor Codes . . 53 – 54
Board Connections & Locations. 54 – 56
Waveforms. . . . . . . . . . . . . . . . . . 54 – 56
Main Board. . . . . . . . . . . . . . . . . . 57 – 60
CRT Socket . . . . . . . . . . . . . . . . . 61 – 62
Power and Deflection Board. . . . 61 – 62
Front Board . . . . . . . . . . . . . . . . . 63 – 64
Video Board . . . . . . . . . . . . . . . . . 63 – 64
Specifications
Power Rating . . . . . . . . . . . . . . . . . . . . . 120V, 60Hz
140W (Avg), 2.5A (Max)
Antenna Input Impedance . . . . . . . . . . . . . . . . . 75Ω
UHF/VHF/CATV
Digital
Receiving Channel . . . . . . . . . . . . . . . . 2 - 13 (VHF),
14 - 69 (UHF),
01, 14 - 94, 95 - 125 (CATV)
1 - 99 (Digital)
Remote Ready . . . . . . . . . . 32 Key Remote Control
Sound Output . . . . . . . . . . . . . . . . . . . . . . 5.0 W/CH
Intermediate Frequency
Picture IF Carrier. . . . . . . . . . . . . . . . . . 45.75MHz
Sound IF Carrier . . . . . . . . . . . . . . . . . . 41.25MHz
Color Sub Carrier . . . . . . . . . . . . . . . . . 42.17MHz
Picture Tube . . . . . . . . . . . . . . . . W76QEN693X100
Semiconductors
Integrated Circuits . . . . . . . . . . . . . . . . . . . . . . . 23
Transistors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Except within Tuners, RC Pre-Amp. & Digital Module
Cabinet Dimensions
Width. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 878 mm
Height . . . . . . . . . . . . . . . . . . . . . . . . . . . . 573 mm
Depth. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 550 mm
REFERENCE No. SM780109
HT30746, H3FLM, PRODUCT CODE 113000990
A
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PO
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Servicing should be performed by only trained and qualified service personnel.
with a double “Z” is a registered trademark
of Sanyo Manufacturing Corporation.
© Sanyo Manufacturing Corporation 2006

Sanyo VIZZON HT30746 Specifications

General

Brand	Sanyo
Model	VIZZON HT30746
Category	TV
Language	English

Summary

Specifications

Power Rating

Details the electrical power consumption and input requirements.

Receiving Channel

Specifies the range of channels supported by the receiver.

Cabinet Dimensions

Provides the physical measurements of the television set.

Safety Precautions

General Safety Instructions

Outlines essential safety procedures for servicing the TV.

ESD Precautions

Details measures to prevent damage from electrostatic discharge.

X-Radiation Precautions

Explains how to prevent hazardous X-radiation exposure during service.

High Voltage Hold-Down Test

Describes a critical test for the high voltage safety circuit.

Service Adjustments

On-Screen Service Menu System

Explains how to access and navigate the service menu for adjustments.

Initial Bus Data Setup

Critical steps for setting initial data after EEPROM replacement or adjustment.

Service Hints

Power Failure Detector

Describes the function of the CPU-based power failure detection system.

Mechanical Disassemblies

Cabinet Back Removal

Step-by-step guide to removing the TV's back cover.

Chassis Removal

Procedure for safely removing the main chassis from the cabinet.

Picture Tube Removal

Detailed instructions for removing the CRT, with safety notes.

Chassis Electrical Parts List

Main PC Board Parts

Lists components found on the main PC board.

Power/Deflection Board Parts

Lists components for the power and deflection board.

Front PC Board Parts

Lists components on the front PC board.

Video PC Board Parts

Lists components for the video PC board.

Digital PC Board Parts

Lists components on the digital PC board.

Component and Testpoint Locations

Main Board Locations

Illustrates component placement on the main circuit board.

Power/Deflection Board Locations

Shows component positions on the power/deflection board.

CRT Socket Board Locations

Depicts component arrangement on the CRT socket board.

Video Board Locations

Illustrates component placement on the video board.

Front Board Locations

Shows component positions on the front board.

Power Supply System

Power Lines

Diagram showing the flow and distribution of power throughout the TV.

Main CPU Data Bus Lines

System Data Flow

Illustrates the data bus connections between the main CPU and other modules.

Block Diagram

Signal Flow

Provides an overview of signal paths for audio, video, and digital inputs.

IC2501 CRT Driver Block Diagram

IC3401 Audio Processor Block Diagram

IC001 Audio Amplifier Block Diagram

Troubleshooting Flow Charts

No Power Troubleshooting

Diagnostic steps for when the TV does not turn on.

No Picture Troubleshooting

Step-by-step guide for diagnosing picture-related issues.

No Sound Troubleshooting

Flow chart for identifying and resolving audio problems.

Control Port Function

CPU Control Pins

Lists and describes the function of each control port pin on the CPU.

Mode Switching Table

Explains how input modes are selected via control signals.

Notes on Schematic Diagrams

Schematic Usage Notes

Guidelines for interpreting schematic symbols, codes, and diagrams.

Component Location References

Information on pin layouts, code charts, and board connections.