Hyundai hlcd 32xt schematic
32″ LCD TV Hyundai HLCD-32XT
Service
Service
Service
Horizontal Frequency
31.5KHz-49KHz
TABLE OF CONTENTS
Description Page Description Page
Table Of Contents.......……..............................…........1
Revision List.…........................................……......3
1. Monitor Specification.................................………........4
2. Operating Instructions……………...……….……….......6
2.1 The Use Of Remote Control..……………...................6
2.2 Front Panel Control Knobs.…...............……...............7
2.3 OSD Operations…...………........................…............8
2.4 How To Connect.……….….……......………..............15
3 Input/Output Specification…………..........................19
3.1 Input Signal Connector……......................................19
7. PCB Layout ………….………………….…....….......31
7.1 Main Board.………..........................................31
7.2 Power Board………..…..…..............................34
7.3 Tuner Board………..…..….............................37
7.4 IR Board….………..................….......................38
7.5 Key Board……….....….......................... ...... ...... ..39
7.6 Headphone Board…..…..……...............................40
8. Block Diagram.……….….........................................41
9. Schematic Diagram……………...…………………...42
9.1 Main Board……………..…..………………………..42
3.2 RGB Input Signal Timing …….....……......................20
4. Mechanical Instructions………………...…..................21
5. Repair Flow Chart ……………………….……….....25
6. White Balance Luminance Adjustment….…….......30
SAFETY NOTICE
ANY PERSON ATTEMPTING TO SERVICE THIS CHASSIS MUST FAMILIARIZE HIMSELF WITH THE
CHASSIS AND BE AWARE OF THE NECESSARY SAFETY PRECAUTIONS TO BE USED WHEN SERVICING
ELECTRONIC EQUIPMENT CONTAINING HIGH VOLTAGES.
9.2 Power Board..............….....................................52
9.3 Tuner Board………..…..…..…..............................53
10.Exploded View………………….....................…..57
11.BOM List…............................................................59
CAUTION: USE A SEPARATE ISOLATION TRANSFOMER FOR THIS UNIT WHEN SERVICING
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32″ LCD TV Hyundai HLCD-32XT
Important Safety Notice
Proper service and repair is important to the safe, reliable operation of all AOC Company Equipment. The service
procedures recommended by AOC and described in this service manual are effective methods of performing service
operations. Some of these service operations require the use of tools specially designed for the purpose. The
special tools should be used when and as recommended.
It is important to note that this manual contains various CAUTIONS and NOTICES which should be carefully read in
order to minimize the risk of personal injury to service personnel. The possibility exists that improper service
methods may damage the equipment. It is also important to understand that these CAUTIONS and NOTICES ARE
NOT EXHAUSTIVE. AOC could not possibly know, evaluate and advise the service trade of all conceivable ways in
which service might be done or of the possible hazardous consequences of each way. Consequently, AOC has not
undertaken any such broad evaluation. Accordingly, a servicer who uses a service procedure or tool which is not
recommended by AOC must first satisfy himself thoroughly that neither his safety nor the safe operation of the
equipment will be jeopardized by the service method selected.
Hereafter throughout this manual, AOC Company will be referred to as AOC.
WARNING
Use of substitute replacement parts, which do not have the same, specified safety characteristics might create
shock, fire, or other hazards.
Under no circumstances should the original design be modified or altered without written permission from AOC.
AOC assumes no liability, express or implied, arising out of any unauthorized modification of design.
Servicer assumes all liability.
FOR PRODUCTS CONTAINING LASER:
DANGER-Invisible laser radiations when open AVOID DIRECT EXPOSURE TO BEAM.
CAUTION-Use of controls or adjustments or performance of procedures other than those specified herein may
result in hazardous radiation exposure.
CAUTION -The use of optical instruments with this product will increase eye hazard.
TO ENSURE THE CONTINUED RELIABILITY OF THIS PRODUCT, USE ONLY ORIGINAL MANUFACTURER'S
REPLACEMENT PARTS, WHICH ARE LISTED WITH THEIR PART NUMBERS IN THE PARTS LIST SECTION OF
THIS SERVICE MANUAL.
Take care during handling the LCD module with backlight unit
-Must mount the module using mounting holes arranged in four corners.
-Do not press on the panel, edge of the frame strongly or electric shock as this will result in damage to the screen.
-Do not scratch or press on the panel with any sharp objects, such as pencil or pen as this may result in damage to
the panel.
-Protect the module from the ESD as it may damage the electronic circuit (C-MOS).
-Make certain that treatment person’s body is grounded through wristband.
-Do not leave the module in high temperature and in areas of high humidity for a long time.
-Avoid contact with water as it may a short circuit within the module.
-If the surface of panel becomes dirty, please wipe it off with a soft material. (Cleaning with a dirty or rough cloth may
damage the panel.)
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32″ LCD TV Hyundai HLCD-32XT
Revision List
Version Release Date Revision Instructions TPV Model
A00 Dec-30-2007 Initial Release E326MTNSW2H4N
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32″ LCD TV Hyundai HLCD-32XT
1. Monitor Specification
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32″ LCD TV Hyundai HLCD-32XT
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32″ LCD TV Hyundai HLCD-32XT
2. Operations Instructions
2.1 The Use of Remote Control
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32″ LCD TV Hyundai HLCD-32XT
2.2 Front Panel Control Knobs
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32″ LCD TV Hyundai HLCD-32XT
2.3 OSD Operations
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32″ LCD TV Hyundai HLCD-32XT
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32″ LCD TV Hyundai HLCD-32XT
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32″ LCD TV Hyundai HLCD-32XT
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32″ LCD TV Hyundai HLCD-32XT
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32″ LCD TV Hyundai HLCD-32XT
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32″ LCD TV Hyundai HLCD-32XT
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32″ LCD TV Hyundai HLCD-32XT
2.4 How to Connect
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32″ LCD TV Hyundai HLCD-32XT
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32″ LCD TV Hyundai HLCD-32XT
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32″ LCD TV Hyundai HLCD-32XT
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32″ LCD TV Hyundai HLCD-32XT
3. Input/ Output Specification
3.1 Input Signal connector
This procedure gives you instructions for installing and using the LCD TV display.
Lay the display on the desired operation and plug the power cord into a convenient AC outlet. Three-wire power cord
must be shielded and is provided as a safety precaution as it connects the chassis and cabinet to the electrical
conduct ground. If the AC outlet in your location does not have provisions for the grounded type plug, the installer
should attach the proper adapter to ensure a safe ground potential.
Connect the 15-pin D-SUB color display shielded signal cable to your signal system device and lock both screws on
the connector to ensure firm grounding. The connector information is as follow:
1
6
11 15
5
10
15 - Pin Color Display
Pin No. Description
1 Red Video
2 Green Video
3 Blue Video
4 TXD
5 Ground
6 Red Ground
7 Green Ground
8 Blue Ground
9 +5V
10 Ground
11 RXD
12 Serial Data for DDC
13 H-Sync.
14 V-Sync.
15 Serial Clock for DDC
Apply power to the display by turning the power switch to the "ON" position and allow about ten seconds for Panel
warm-up. The Power-On indicator lights "GREEN" when the display is on.
With proper signals feed to the display, a pattern or data should appear on the screen, adjust the brightness and
contrast to the most pleasing display, or press auto-adjust to get the best picture-quality.
This TV (with PC function) has power saving function following the VESA DPMS. Be sure to connect the signal
cable to the PC.
If your TV requires service, it must be returned with the power cord.
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32″ LCD TV Hyundai HLCD-32XT
3.2 RGB Input Signal Timing
Vertical Horizontal Sync Polarity Presence Screen Mode
Dots × Lines
720 × 400 70.1 31.5 NEG POS YES YES YES NO
640 × 480
800 x 600
1024 x 768 60.0 48.36 NEG NEG YES YES YES NO
1360 x 768 60.0 47.36 POS NEG YES YES NO YES
Frequency Frequency Normal FULL
(Hz) (kHz)
59.9 31.5 NEG NEG YES YES YES NO
75.0 37.5 NEG NEG YES YES YES NO
60.0 37.9 POS POS YES YES YES NO
75.0 46.87 POS POS YES YES YES NO
Horizontal Vertical Horizontal Vertical
(4:3) (16:9)
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32″ LCD TV Hyundai HLCD-32XT
A
4. Mechanical Instructions
Step Figure Description
Lay the
LCD-TV on a
Preparation
Remove
the stand.
flat, soft and
clean
surface.
Remove the
screws A, B,
C
D F
C, D, E, F to
remove the
stand.
B
E
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32″ LCD TV Hyundai HLCD-32XT
Remove the
screws
Remove
rear cover.
Remove
the cover
card
reader.
marked in
red to
remove the
rear cover.
Remove the
screws
marked in
red to
remove the
cover card
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reader.
32″ LCD TV Hyundai HLCD-32XT
Remove
the shield.
Remove the
screws
marked in
red to
remove the
shield.
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32″ LCD TV Hyundai HLCD-32XT
K
Remove the
bezel.
J
I
L M
N
O
Remove the
screws E, F,
G, H, I, J, K,
L, M, N, O to
remove the
bezel.
H
E
F
G
Remove the
Remove
the main
board,
power
board and
tuner
board.
Remove
the BKT
HOLD
PANEL.
screws
marked in
red to
remove the
main board,
power board
and tuner
board.
Remove the
screws
marked in
red to
remove the
BKT HOLD
PANEL.
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32″ LCD TV Hyundai HLCD-32XT
5. Repair Flow Chart
5.1 Can not start
Check LED indicate
OK
NG
Check power supply of the power board
Check key board
Repair the key board
Check PWR-ON signal
OK
Check 5V_SB
OK
Check 3.3V SB
OK
NG
NG
Check power supply of the power board
Check U702
Check Q704, Q705, Q706, Q709
NG
Check U402, U401
OK
Check I2C communication
Check main board power supply part
OK
Check power supply of the main board
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32″ LCD TV Hyundai HLCD-32XT
5.2 No display
Check the source
OK
Check LVDS
OK
Check 24V inverter power supply
OK
Check main board power supply
OK
Check U302
OK
Check I2C communication
NG
NG
NG
Reset source
Reset LVDS
NG
Check power board power supply
Replace U302
OK
Check Panel
NG
Replace Panel
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32″ LCD TV Hyundai HLCD-32XT
5.3 Abnormal display
Check the source
OK
Check signal filter circuit
OK
OK
Check U301
NG
Reset source
NG
TV signal Check TV system setup
AV signal
PC signal
HDMI, DVI signal
NG
Replace the filter or inductance
OK
Check TU100
Check U104
Check U201
Check U407
Replace U301
NG
NG
Replace TU100
Replace U104
Replace U201
NG
Replace U407
OK
Check U302
OK
Check Panel
NG
NG
Replace U302
Replace Panel
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32″ LCD TV Hyundai HLCD-32XT
A
5.4 No sound
Check the source
OK
Check signal filter circuit
OK
Check Earphone jack
OK
Check U601
OK
Check U502
OK
Check U503
OK
Check speaker
NG
NG
NG
NG
NG
Reset source
NG
SIF signal Check TV system setup
V, Component signal
HDMI signal
Replace the filter or inductance
Replace the Earphone jack
OK
Check TU100
Check CS4344-CZZ
Replace U601
Replace U502
Replace U503
Replace speaker
NG
Check U100
Replace TU100
NG
Replace U100
NG
Replace CS4344-CZZ
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