Adelpia TGL2240A User manual

22” LCD Color Monitor Adelpia TGL2240A
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Service
Service
Service
Horizontal Frequency
30KHz – 80KHz
TABLE OF CONTENTS
Description PageDescription Page
N
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.
Table Of Contents.......……..……..........................…........1
Revision List.….............……..........................……......2
Important Safety Notice.…………....................……......3
1. Monitor Specification..............................………........4
2. LCD Monitor Description…………………………….......5
3. Operation Instruction…………...............……...........6
3.1 General Instructions...........................…...........6
3.2 Control Button…………….…..............……...............6
3.3 Adjusting the Picture...........................…............8
4. Input/Output Specification............……………............11
4.1 Input Signal Connector.................…………................11
4.2 Factory Preset Display Modes....................................13
4.3 Power supply features………………………………..…13
4.4 Panel Specification.....……………………....................14
5. Block Diagram……....................…….………................16
5.1 Software Flow Chart….……………………....….......16
5.2 Electrical Block Diagram……..……………..….....…18
6.Schematic……………....................................…20
6.1 Main Board.…….....……..........................................20
6.2 Power Board..…………..……..................................24
7. PCB Layout..……………….......................................27
7.1 Main Board……………….........................................27
7.2 Power Board………....………...................................29
7.3 Key Board………………………………………………30
8. Maintainability………........................……...............31
8.1 Equipments and Tools Requirement………..............31
8.2 Trouble Shooting…….…………...............................32
9. White-Balance, Luminance adjustment.............38
10. Monitor Exploded View……...….……………............40
11. BOM List...……….....................................................41
CAUTION: USE A SEPARATE ISOLATION TRANSFOMER FOR THIS UNIT WHEN SERVICING

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Revision List
Revision Date Revision History TPV Model
A00 Aug.-18-08 Initial Release TCRMMTNFX2UQHN

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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 may 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 radiation 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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1. Monitor Specifications

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2. LCD Monitor Description
The LCD MONITOR will contain a main board, a power board and a key board which house the flat panel control logic,
brightness control logic and DDC.
The power board will provide AC to DC Inverter voltage to drive the backlight and the main board chips each voltage.
Monitor Block Diagram
Video signal, DDC
Power Board
(Contains Adapter, Inverter)
Flat Panel and
CCFL backlight
Main Board
Key board
RS232 Connector
For white balance
adjustment in factory
mode
HOST Computer
CCFL Drive.
AC IN
100V ~ 240V

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3. Operating Instructions
3.1 General Instructions
Press the power button to turn the monitor on or off. The other control buttons are located in the bottom of the bezel. By
changing these settings, the picture can be adjusted to your personal preferences.
-The power cord should be connected.
-Connect the video cable from the monitor to the video card.
-Press the power button to turn on the monitor, the power indicator will light up.
3.2 Control Button

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3.3 Adjusting the Picture

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4.Input/Output Specification
4.1 Input Signal Connector

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4.2 Preset operating modes
4.3 Power Supply Features
• A/C Line voltage range: 90 V - 264 V
• A/C Line frequency range: 50 Hz - 60Hz
• Current: 1.5 A max. at 100V/1.5A max. at 240V
• Peak surge current: < 55 A peak at 240 V AC and cold starting
• Leakage current: < 1.5 mA for power from PC-outlet
< 3.5 mA for power from Wall-outlet
• Power line surge: No adverse effects (no loss of information or defect) with a maximum of 1
half wave missing per second
Power factor correction According to EN 61000-3-2

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4.4 Panel Specification
M220Z1-L03
OVERVIEW
The M220Z1-L03 model is a 22 inch wide TFT-LCD module with a 4-CCFL Backlight Unit and a 30-pin 2ch-LVDS
interface. This module supports 1680 x 1050 WSXGA+ (16:10 wide screen) mode and displays up to 16.7 millions
colors. The inverter module for the Backlight Unit is not built in.
General Specifications
Mechanical Specifications
Electrical Characteristics

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Optical Characteristics

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5. Block Diagram
5.1 Software Flow Chart
1
2
N
Y
5
Y
N
10
Y
N
12
Y
N
7
Y
N
6
4
3
8
9
14
11
13
Y
N
15
Y
N
16
17
19
Y
N
18

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1). MCU initialize.
2). Is the EEPROM blank?
3). Program the EEPROM by default values.
4). Get the PWM value of brightness from EEPROM.
5). Is the power key pressed?
6). Clear all global flags.
7). Are the AUTO and SELECT keys pressed?
8). Enter factory mode.
9). Save the power key status into EEPROM. Turn on the LED and set it to green color. Scalar initialize.
10). In standby mode?
11). Update the life time of back light.
12). Check the analog port, are there any signals coming?
13). Does the scalar send out an interrupt request?
14). Wake up the scalar.
15). Are there any signals coming from analog port?
16). Display "No connection Check Signal Cable" message. And go into standby mode after the message
disappears.
17). Program the scalar to be able to show the coming mode.
18). Process the OSD display.
19). Read the keyboard. Is the power key pressed?

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5.2 Electrical Block Diagram
5.2.1 Scaler Board Block Diagram
U401
Scalar IC TSUMO58GHL-LF
(Include MCU, ADC, OSD)
·
D-Sub
Connector
(CN101)
H sync
V sync
RGB
LCD Interface
(CN301)
Key Board
Control
(CN402)
Crystal
(X401)
14.31818MHZ
DVI
Connector
(CN102)

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5.2.2 Power Board Block Diagram
EMI filter Bridge
Rectifier and
Filter
Start Circuit
R904, R905, R906
PWM
Control IC
Transformer
Feedback
circuit
Rectifier
Diodes
AC input
5V
5V1
ON/OFF
Control
PWM
Control IC
Feedback
Circuit
OSC and
Output
DC
Convert
MOSFET
Q805, Q806
Over Voltage
protect
Lamp
ON/OFF
DIM
CN902
Audio Power Amplifier
IC601 APA2069JITUL
CN602
Audio L/R out

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6. Schematic
6.1 Main Board