Suzuki SZTV-40LED6A User manual

Brand: Suzuki

Model: SZTV-40LED6A

Type: User manual

SUZUKI

LED TV SERVICE MANUAL

Model Name:

Version NO : 1.0

The release of this document is under controlled by the company. Any extra

copy of this document must be written permission by the product manager.

SZTV-40LED6A

TABLE OF CONTENTS

RECORDS OF REVISION …………………………………………………………………………..…..03

CHAPTER 01: WARNING……………………………………………………………………………04

CHAPTER 02: SAFETY PRECAUTIONS…………………………………………………………..05

CHAPTER 03: PRODUCT ROUGH SPEC……………………...…………………………………..07

CHAPTER 04: MAIN COMPONENT DIAGRAM………………………………………….……..07~11

CHAPTER 05: EASY TROUBLE SHOOTING…………………………………………………11~15

CHAPTER 06: TOOUBLE SHOOTING FLOW CHART………………………………………16~21

CHAPTER 07: MAIN BOARD SCHEMATICS…………………………………………………21~34

CHAPTER8 : PWERT BOARD SCHEMATICS………………………………………………….34~35

CHAPTER9 : FIRMWARE UPDATE SOP…………………………………………………………36-39

RECORDS OF REVISION

Revision No. Revision Date

Page Reason Description

V1.0 2012.11.30 All Initial Release

CHAPTER 1: WARNING

This service information is designed for experienced repair technicians only and is

notdesigned for user by the general public.It does not contain warnings or cautions to

advise non-technical individuals of potential dangers in attempting to service a

product.Products powered by electricity should be serviced or repaired only by

experienced professional technicians.Any attempt to service or repair the product or

products dealt within this service information by anyone else could result in serious

injury or death.

CHAPTER 2: SAFETY PRECAUTIONS

2-1. CAUTION:

No modification of any circuit should be attempted. Service worker should only be performed after going

through to familiar with all of the following safety checks and servicing guidelines.

2-2. SAFETY CHECK

Care should be taken while servicing this TV display. Because of the high voltage is used in the inverter

circuit. These voltages are exposed in such areas as the associated transformer circuits.

2-3. POWER SUPPLY REQUIREMENTS

The internal power converter with the attached AC power cord is necessary for the TV monitor. Any attempt to

replace another power converter could result in serious of problems on the display.

2-4. LEAKAGE CURRENT HOT CHECK

2-4-1 Plug the AC cord directly into the AC outlet. Do not use an isolation transformer during this check.

2-4-2 Connect a 1500 ohm, 10 watt resistor, paralleled by a 0.15uF capacitor between each metallic part and a

good earth ground.

2-4-3 Use an AC voltmeter with 1000 ohm / volt or more sensitivity and measure the AC voltage across the

combination 1500 ohm resistor and 0.15uF capacitor.

2-4-4 Move the resistor connection to each exposed metallic part and measure the voltage.

2-4-5 Reverse the polarity of the AC plug in the AC outlet and repeat the above measurement.

2-4-6 Voltage measured must not exceed 1.5 volt RMS, from any exposed metallic part to the ground.

A leakage current tester may be used in the above hot check, in which case any circuit measured

must not exceed 1 milliamp. In the case of a measurement exceeding the 1 milliamp value, the rework is

required to eliminate the chance of a shock hazard.

To Metal Parts

AC VOLTMETER

1500 10W

0.15u

Earth Ground

CHAPTER 3: PRODUCT ROUGH SPEC

Product Rough Specification

TV ID YC CA1

Pnael Model V390HJ-P02

Main Board Model TP.VST59.P83A

Power model NC

Power Consumption(Stand-by Mode) <0.5W

Power Consumption(MAX) 45W

Power Input Voltage 110-240V~

General

Information

Power Rated Input Freq 50/60Hz±5%

Video System PAL ;SECAM

Sound System BG;DK,I,L/L' ;NICAM/A2

Max Storage Channel 199CH

ATV

Teletext 1000Page

Modulation NA

Video System NA

Sound System NA

Basic Functions NA

Max Storage Channel NA

DTV

Teletext NA

COMB Filter 3D

Deinterlace 3D

Audio power output 2 X 8W@8ohm THD+N<10%@1KHz

Audio Frequency Response 100Hz~15KHz

OSD Language Eng;Fre; Gen,Ita,Rus,Put

Other

Parameter

Panel Resolution Up to 1920*1080

AV Input 1

S-Video Input NO

SCART Input 1

CI (Common Interface) NO

Component(Y Pb Pr or Y Cb Cr) 1

VGA D-15 Input 1

PC Audio L/R Input 1

HDMI Input 3

Head phone out 1

AV out NO

SPDIF NO

Terminals

DVD & Driver board NO

EMC EN 55022 Class B Yes

Safety EN 60950 (Europe) Yes

ESD spec. 4 / 8 KV (Reference)

Operation Temperature 0~40'C(Operating), -20~60'C(Storage)

Environmental

Conditions

Relative Humidity 10~85%(Operating) 5~95%(Storage)

CHAPTER 4: MAIN BOARD CONNECTION

5-1: Main Board TOP View

5-2: Main Board Botton View

5-3: Main Board Connection

CHAPTER 5: EASY TROUBLE SHOOTING

7.1 Troubleshooting for Common Use

Note: Before opening the cabinet and working on the repairs, please read the troubleshooting and Q&A

attached in theuser’s manual, which has covered most of the problems caused by unproper using or settings to

the TV set. If that does notwork, please carry out the easy troubleshooting before checking or replacing the main

parts of the television. The

troubleshooting guides given below base on the situation in which the TV’s functions are set and used

properly.Plus, if the easy troubleshooting can not help, please work on the repairing according to the procedures

given in chapter 5,Exception Handles.Check the connection and condition of wires and inlets that relate to power

board, including the AC power inlet, the power incoming wire, wires between power board and mainboard, etc.

TV can not be turned on

Check the diagram arround power board to see If there exists a short circuit or creepage.

Check the sleep timer setting.

Auto turning off

Check the surrounding diagram of power board. The problem is most possibly caused by short circuit or wire

breakage,

because this kind of malfunctions can cause excessive current, which will make the power board startup

self-protection.

If the TV screen can not display after the blink, that means the panel or other parts of equipment is broken (most

likely by

unproper input voltage). Ensure the input voltage of every component, and then check the part that is suspected

damaged.

The screen goes black after a shorting blink

If the panel can work normally at the other time, it may be caused by bad mainboard. Upgrade to the latest

software first,

if that does not work, attempt to change the mainboard.

There exists afterimages after power off

If this problem occurs repeatedly, check the surrounding diagram and connections of panel inverter board. Also,

the

blacklight unit and LCD lamps should be checked out.IListen to the squeak carefully to make sure where the noise

comes from. If it is from speakers, the voice may be caused by bad speakers. Change them for a try..

There exists squeak when TV is working

If the noise comes from the inner parts of cabinet, it may be produced by abnormal AC current in power board.

Change the

board and check its surrounding circuits for a try.Check the routing of wires inside the cabinet to suppress

interference.

The power board may be bad. Please change the board for testing. If it cannot help, refer to the chapter 5 for more

intensive information.In addition, the malfunction of LCD panel can cause failure of power on. Please refer to 4.2

Troubleshooting for Displayingfor more information.

7.2 Troubleshooting for Displaying

Check the power board output and main board input ports to make sure whether the TV has been turned on

successfully,

because the failure in power on can lead to a no-display problem.

No display (including white screen, black screen, etc.)

Note: If the troubleshooting given below can not help you, change the LCD panel for a try. But we strongly suggest

you

regard changing the panel as the last step of fixing the display problem.

If it is proved to have been electrified and turn on, check the LVDS cable first.

Check if both of the two plugs of the flat cable between mainboard and power board have been well inserted into

the slots.

Unstable power supply can also cause serious display problem.

If the display problem only happens in one input mode, that may be caused by wrong version software. Update the

new

software. If that can’t help, change the main board for a try.

Bad LVDS cable and inappropriate panel driving voltage is still the biggest factor of this problem. So check them

first.

Screen tearing, or there exists moire on screen

If the cable and voltage are correct, update the software for a try.Sometimes the fastening pieces can make

unproper pressure to LCD panel, check them out.Refer to chapter 5 for more details and resolution ways.Refer to

chapter 5 for more details and resolution ways.If the screen tearing happens in one or several input sources while

the other source can display normally, it can be caused by bad mainboard most likely. Please change the

mainboard for a try.If the bad line is very narrow, it is usually caused by LCD panel malfunction, change the panel

for a try.

Straight dark/light line(s) on screen

If the lines link together and become a bad band, upgrade the software and then check the ports abd circuits of

brokendownoutput mode(s).If the dark/light line ,or band, apprears in all the input modes, please change the LCD

panel. But we suggest you check the panel inlet board(which links the panel and mainboard though LVDS cable)

first, because sometimes the liquid crystal displaying unit is okay, while the inlet board has a transmitting problem,

which also will lead to a displaying failure. If the cast or interference happens in only one input mode, check the

output port(on mainboard) and transmitting network (arround mainboard) of that mode.

Color cast or interference

If the cast or interference happens in all the input modes, please exclude the malfunction according to easy

troubleshooting for No Display. If that can not help, refer to chapter 5 for more details and resolution ways. In

addtion, most of this kind of problems come from the bad mainboards.

Chapter 4 Easy Troubleshooting

7.3 Troubleshooting for Audio

Check whether the speakers are broken first.

No Sound

Note: Comparing with the display problem, the audio malfunctions are easier to work out. Constantly, if you have

excluded

the possibility of bad speakers and bad connection of audio output, the problem generally comes from the audio

processing parts of mainboard. Please change mainboard for a try, or refer to chapter 5 for further information

about repairing. Check the wire that links the mainboard and speakers. Watch if there is fracture or cladding

material breakage.

Check the joint of speakers and audio wire, watch if there is poor soldering or fake solder. Besides, the polarity

mistake

can also lead to audio problem.

7.4 Troubleshooting for Keyboard

Check the wire between mainboard and keyborad, watch if there is fracture or cladding material breakage.

No key can work

Check the joint of mainboard and keyboard wire, watch if there is poor soldering ofrfake solder.

Check the resistances that locate on the keyboard PCB. Watch if there is wrong or broken ones. Also, the poor

soldering of fake solder should be concerned and checked carefully.

Check the other components of keyboard(such as capacitances and microswithes) are wrong or bad. Check

whether there is a jam at the sound hole in front cabinet.

Volume too low

Check whether one or more speakers are bad.

Check whether the audio wires are installed reversedly. The left channel wire should be white and the right

channel wire

is red.

Sound channel loss or confounding

If the connection is stable and right, the mainboard audio output module may be bad, refer to chapter 5 for more

details

and resolution ways.

Check the audio output socket of mainboard to see whether it is wrongly inserted. If not, the mainboard audio

output module may be bad, refer to chapter 5 for more details and resolution ways.

Check if there is anything should not exist in the speaker hollow space (such as screws).

Noise

Check if the speakers are bad.

Check if the antihunting EVA is broken or missing.

Check the screws that fasten the keyboard to the cabinet. They may be lost or getting loose.

Keys are sunken

The key set may be bad, change them.

7.5 Troubleshooting for Remote Control

Check the wire between mainboard and RC board, watch if there is fracture or cladding material breakage.

The RC (remote control, the same below) does not work

Note: If the troubleshooting can not help, please change the RC board. If that still can’t solve the problem, please

refer to

chapter 5 for more details and resolution ways with a will to mainboard repairing.

Check the joint of mainboard and RC board wire, watch if there is poor soldering or fake solder. Also, the short

circuit

can lead to this problem, too.

Check the infrared senser that locates on the keyboard PCB. Watch if it is wrong or broken. Also, the poor

soldering of

fake solder should be concerned and checked carefully.

The short circuit is the most probable causation factor of this proble. Check the wire and joints for a judgement.

The LED displays light in wrong color

Check the cable that links mainboard and RC board, watch if it is inserted with wrong location(similar with

left-right channel

wire fault for audio).

Check the LED assembling, watch if its pins are in wrong location.

Check the other components of RC board are wrong or bad.That is usually caused by bad keyboard, change it for

a try.

There is a reacting delay when operating the keys

Check the keyboard to see whether there is a short circuit between each soldering joint.

Functions of keys are out of order

If a key is supposed to be able to achieve more than one functions, but it can achieve not all of them, that is

usually

caused by wrong software. Please update the latest and correct software for a try.

If you can’t ensure where the problem comes from, change the keyboard for a try. If that still can’t help, refer to

chapter 5

for more details and resolution ways.

Check all the resistances on PCB board.

CHAPTER 6: TROUBLE SHOOTING FLOW CHART

CHAPTER 7: MAIN BOARD&POWER SCHEMATICS

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Suzuki SZTV-40LED6A User manual

Suzuki SZTV-40LED6A User manual

Suzuki SZTV-40LED6A User manual

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