JVC LT-Z37EX6 User Manual

1-8 (No.YA462)
2.4.2 MAIN CPU PIN FUNCTION [IC7301
: DIGITAL PWB]
Pin Pin name I/O Function Pin Pin name I/O Function
1 TCK O Test purpose 65 D2 I/O Program ROM data for main CPU
2 TMS I Test purpose 66 D12 I/O Program ROM data for main CPU
3 TDI I Test purpose 67 D10 I/O Program ROM data for main CPU
4 TDO O Test purpose 68 VSS33 - GND
5 P2.8 O TV, Subtitle/OTHER 69 VDD33 I 3.3V
6 P2.9 O Blue for OSD 70 D4 I/O Program ROM data for main CPU
7 P2.10 O Blue for OSD 71 D3 I/O Program ROM data for main CPU
8 P2.11 O Blue for OSD 72 D11 I/O Program ROM data for main CPU
9 P2.12 O Blue for OSD 73 RSTIN I Reset
10 P2.13 O Blue for OSD 74 POWER O Sleep state release for chassis CPU [Relese : L]
11 P2.14 I Not used 75 P3.1 O DM_RESET(IDTV)
12 P2.15 O Request for chassis CPU communication 76 REMOCON I Remote control
13 VSS33 - GND 77 P3.3 I Clock for OSD
14 VDD33 I 3.3V 78 P3.4 O Red for OSD
15 P4.5 O Not used 79 P3.5 O Red for OSD
16 A20 O Program ROM address for main CPU 80 P3.6 O Red for OSD
17 A19 O Program ROM address for main CPU 81 P3.7 O Red for OSD
18 A18 O Program ROM address for main CPU 82 MTST I/O Data transmission for chassis CPU communication
19 A17 O Program ROM address for main CPU 83 MTSR I/O Data receive for chassis CPU communication
20 VSS25 - GND 84 VSS33 - GND
21 VDD25 I 2.5V 85 VDD33 I 3.3V
22 A16 O Program ROM address for main CPU 86 VSS25 - GND
23 A8 O Program ROM address for main CPU 87 VDD25 I 2.5V
24 A7 O Program ROM address for main CPU 88 TXD0 I/O Communication for adjustment
25 A9 O Program ROM address for main CPU 89 RXD0 I/O Communication for adjustment
26 A6 O Program ROM address for main CPU 90 P3.12 O Red for OSD
27 A5 O Program ROM address for main CPU 91 CLK O Clock for chassis CPU communication
28 A10 O Program ROM address for main CPU 92 P3.15 O Green for OSD
29 A11 O Program ROM address for main CPU 93 P5.14 O Green for OSD
30 A12 O Program ROM address for main CPU 94 P5.15 O Green for OSD
31 VSS33 - GND 95 TRIG_IN O Green for OSD
32 VDD33 I 3.3V 96 TRIG_OUT O Green for OSD
33 A4 O Program ROM address for main CPU 97 P6.2 O Green for OSD
34 A3 O Program ROM address for main CPU 98 P6.3 I/O I
2
C bus clock (for main memory)
35 A2 O Program ROM address for main CPU 99 P6.4 I/O I
2
C bus Data (for main memory)
36 A1 O Program ROM address for main CPU 100 P6.5 O Teletext signal select [Analog RGB : H / Digital RGB : L]
37 A0 O Program ROM address for main CPU 101 IRQ O IRQ(IDTV)
38 A13 O Program ROM address for main CPU 102 VSYNC I/O Vertical sync
39 ARAS/A14 O Program ROM address for main CPU 103 HSYNC I/O Horizontal sync
40 CAS/A15 O Program ROM address for main CPU 104
COR/RSTOUT O Not used
41 VSS33 - GND 105 BLANK O Ys for OSD / Teletext
42 VDD33 I 3.3V 106 VDD33 I 3.3V
43 MEMCLK O Clock for memory 107 VSS33 - GND
44 CSSDRAM O Chip select for memory 108 XTAL1 I 6MHz for system clock
45 CLKEN O Clock enable for memory 109 XTAL2 O 6MHz for system clock
46 CSROM O Chip select for memory 110 VSSA - GND
47 RD O Read for memory 111 VDDA I 2.5V
48 UDQM O Control buffer of memory 112 R O R for OSD / Teletext
49 LDQM O Control buffer of memory 113 G O G for OSD / Teletext
50 WR O Write for memory 114 B O B for OSD / Teletext
51 D15 I/O Program ROM data for main CPU 115 VSSA - GND
52 VSS33 - GND 116 VDDA I 2.5V
53 VDD33 I 3.3V 117 CVBS2 I Video for Teletext
54 D7 I/O Program ROM data for main CPU 118 VSSA - GND
55 D0 I/O Program ROM data for main CPU 119 VDDA I 2.5V
56 D14 I/O Program ROM data for main CPU 120 CVBS1B I Video for Teletext
57 D8 I/O Program ROM data for main CPU 121 CVBS1A I Video for Teletext
58 D6 I/O Program ROM data for main CPU 122 VSSA - GND
59 D1 I/O Program ROM data for main CPU 123 VDDA I 2.5V
60 VSS33 - GND 124 KEY1 I Key scan data 1 [ON : H]
61 VDD33 I 3.3V 125 KEY2 I Key scan data 2 [ON : H]
62 D13 I/O Program ROM data for main CPU 126 MECA_SW I Main power ON / OFF control [ON : L]
63 D9 I/O Program ROM data for main CPU 127
(KEYP2)P5.3 I Not used
64 D5 I/O Program ROM data for main CPU 128 TMODE I Test purpose

JVC LT-Z37EX6 Specifications

General

Brand	JVC
Model	LT-Z37EX6
Category	LCD TV
Language	English

Summary

PRECAUTIONS AND SERVICE INSTRUCTIONS

Safety Precautions

General safety guidelines for handling and repairing the product.

Isolation Check Procedures

Details procedures for isolation checks to prevent electrical shock hazards.

Specific Service Instructions

Covers system setting, features, and model differences for service.

SPECIFICATIONS

SAFETY PRECAUTIONS AND ISOLATION CHECKS

General Safety Precautions

General safety guidelines for handling and repairing the product.

Isolation Check (Electrical Shock Hazard)

Details procedures for isolation checks to prevent electrical shock hazards.

Dielectric Strength and Leakage Current Tests

Describes dielectric strength and leakage current tests for safety.

INSTALLATION REQUIREMENTS

Heat Dissipation Requirements

Explains the importance of proper ventilation for heat dissipation.

Physical Installation Requirements

Specifies minimum distances and stable flooring requirements for installation.

Securing the Unit

Advises securing the TV to prevent tipping during earthquakes or accidents.

Handling Precautions

Provides precautions for handling the unit when taking it out of the packing case.

LCD PANEL HANDLING AND PROTECTION

Transportation Precautions

Precautions for transporting the unit to prevent LCD panel damage.

Optical Filter Care

Guidelines for cleaning and protecting the optical filter on the LCD panel.

Exterior Parts Replacement Precautions

Precautions to avoid damaging the LCD panel when replacing exterior parts.

SPECIFIC SERVICE INSTRUCTIONS

TECHNICAL INFORMATION

LCD Panel Technology

Explains the LCD panel technology and its "normally black" mode.

LCD Panel Specifications

Lists detailed technical specifications of the LCD panel.

Pixel Fault Definitions

Defines different types of pixel faults (bright, dark, flicker).

DISASSEMBLY PROCEDURES

General Disassembly Steps

Step-by-step guide on how to disassemble the unit safely.

BOARD REMOVAL PROCEDURES (Fig.2)

Removing the LCD Panel Unit

Instructions for removing the LCD panel unit assembly.

MEMORY IC REPLACEMENT

Replacement Procedure

Step-by-step procedure for replacing memory ICs.

Service Mode Setting

Details on how to enter and set values in the service mode.

FACTORY SHIPMENT SETTINGS

CHIP COMPONENT REPLACEMENT

Cautions for Replacement

Cautions to observe when handling and heating chip components.

Replacement Steps

Steps for removing and installing chip components.

ADJUSTMENT PROCEDURES

Adjustment Preparation

Steps to prepare for TV adjustments using remote or components.

Preset Settings Before Adjustments

Presetting functions with the remote control before making adjustments.

Video Circuit Adjustment Items

Lists the specific adjustment items for the video circuit.

Service Mode Operation

Explains how to enter and navigate the service mode.

ADJUSTMENT MODE OPERATIONS

Entering Adjustment Mode

Procedure to enter the adjustment mode from the service menu.

Changing and Memorizing Settings

Details how to change and memorize setting values in adjustment mode.

INITIAL SETTING VALUES IN SERVICE MODE

Video System Setting Values

Initial setting values for the video system.

Audio System Setting Values

Initial setting values for the audio system.

Main CPU System Setting Values

Fixed initial setting values for the main CPU system.

ADJUSTMENT PROCEDURE DETAILS

Video Circuit Adjustment

Detailed procedure for adjusting the video circuit, specifically white balance.

TROUBLESHOOTING GUIDE

Self Check Feature Overview

Overview of the self-check feature for diagnosing operational states.

Entering Self Check Mode

Step-by-step instructions to enter the self-check mode.

Exiting Self Check Mode

Instructions on how to exit the self-check mode and manage failure history.

TROUBLESHOOTING ADDITIONAL ISSUES

Failure History Information

Explains how failure history is counted, stored, and deleted.

Audio and Screen Issues

Using the Self Check Feature

Key considerations and potential issues when using the self-check feature.

Screen Display Problems

Raster Output Error Display

Describes error display when no raster output is present.

IMPORTANT SAFETY WARNINGS

Setup and Power Plug Precautions

Connect only to a 110-240V, 50/60Hz AC outlet and ensure power plug space.

Power Cord Safety

Do not cut or damage the power cord; use appropriate extensions if needed.

Electrical Shock Hazard Warnings

Warnings about dismantling the rear panel and inserting objects into openings.

Fire Hazard Warnings

Warnings about obstructing ventilation holes and placing objects on the TV.

NAMES OF ALL PARTS

BASIC CONNECTIONS GUIDE

INITIAL SETTINGS PROCEDURE

EDITING CHANNELS

CONNECTING EXTERNAL DEVICES

ENJOYING YOUR NEW TV

WATCHING TV OPERATIONS

VIEWING TELETEXT

WATCHING VIDEOS / DVDS

USEFUL FUNCTIONS

Channel Guard Setup

Procedure for setting up "Channel Guard" to lock specific channels.

Sleep Timer Function

How to set the "Sleep Timer" to automatically turn off the TV.

USEFUL FUNCTIONS (CONTINUED)

CUSTOMIZING YOUR TV

ADVANCED PICTURE ADJUSTMENT

TROUBLESHOOTING COMMON ISSUES

Severe Noise or Snow

Picture Interference

TECHNICAL REFERENCE INFORMATION

PARTS LIST AND ABBREVIATIONS

Safety Cautions for Parts

Safety warnings regarding critical parts and replacement.

SCHEMATIC DIAGRAMS

STANDARD CIRCUIT DIAGRAM NOTATIONS

Safety Critical Component Identification

Highlights components critical for safety and requires recommended replacements.

Voltage and Waveform Values

WIRING DIAGRAMS

BLOCK DIAGRAMS