Adelpia A5500DS User manual

22” LCD Color Monitor Adelpia A5500DS
1
Service
Service
Service
Horizontal Frequency
30KHz-80KHz
TABLEOFCONTENTS
Description Page Description Page
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
Important Safety Notice.………….…..................……......2
Revision List.…........................………................……......3
1.Product Feature..............................………........4
2.LCD Monitor Description…………………………….......5
3.Operation Instruction…………...............……...........6
3.1 General Instructions.......................................…...........6
3.2 Control Buttons………..…….…..............……...............6
3.3 Adjusting the Picture...........................…............7
4.Input/Output Specification............……………............10
4.1 Input Signal Connector......….…..……........…….........10
4.2 Factory Preset Display Modes.................…...............11
4.3 Power Supply Requirement…………………………....12
4.4 Panel Specification..............………………..................13
5.Block Diagram…….…...................…………................15
5.1 Software Flow Chart………………….……....….......15
5.2 Electrical Block Diagram…………..……..…..….......17
6.Schematic…………….....................................….....19
6.1 Main Board..............................................................19
6.2 Power Board....…………..........……........................24
7.PCB Layout..…………...........……...........................27
7.1 Main Board………..................……....................27
7.2 Power Board…....................……………..................30
7.3 Key Board……….....…….............……….................31
8.Maintainability………............................……….........32
8.1 Equipments and Tools Requirement......……….......32
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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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 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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22” LCD Color Monitor Adelpia A5500DS
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Revision List
Version Date Revision History TPV Model Name
A00 Oct.-23-07 Initial Release TC7CMANF4WUHDN
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1.Monitor Specifications
Items Description
Driving system TFT Color LCD
Panel Type CLAA220WA01 000 FZ CPT
Size 55cm (21.6”W)
Pixel pitch 0.27675mm (H) x 0.27675mm (V)
Viewable angle 170(H) 160(V) (Type)
Response time (type) 5 ms(Type)
Display Color 16.7M
Contrast Ratio 1000:1
LCD Panel
White Luminance 210cd/m2
Sync. Type H/V TTL
Input Connector D-Sub 15pin，DVI 24pin
Input Video Signal Analog, Digital
H-Frequency 30kHz – 80kHz
Input
V-Frequency 56-75Hz
ON Mode ≤49W
Power Consumption
OFF Mode ≤1W
Max Dot Clock 145MHz
Max. Resolution 1680 x 1050
Plug & Play VESA DDC2BTM
Power Source 100~240VAC,47~63Hz
Display area 465 (H) × 291 (V)
Environmental
Considerations
Operating Temp: 5°C to 35°C
Storage Temp: -20°C to 60°C
Operating Humidity: 10% to 85%
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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 Inverter board will drive the backlight of panel and DC-DC conversion.
Monitor Block Diagram
AC-IN
100V-240V
Power Board
Flat Panel and
CCFL Backlight
Main Board
Key board
RS232 Connector
For white balance
adjustment in factory
mode
HOST Computer
CCFL Drive.
Video signal, DDC
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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 at front panel of the
monitor. 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 position. The power indicator will light up.
3.2 Front Panel Control
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3.3 Adjusting the Picture
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4. Input/Output Specification
4.1 Input Signal Connector
D-SUB
DVI
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4.2 Factory Preset Display Modes
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4.3 Power Supply Requirement
A/C Line voltage range 100 V ~ 240 V
A/C Line frequency range 50 ±3Hz, 60 ±3Hz
Peak surge current < 55A peak at 240 VAC and cold starting
Leakage current < 3.5mA
Power line surge No advance effects (no loss of information or defect)
with a maximum of 1 half-wave missing per second
DC output Voltage 12VDC± 5％
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4.4 Panel Specification
CLAA220WA01 is 22.0” color TFT-LCD (Thin Film Transistor Liquid Crystal Display) module composed of LCD panel,
driver ICs, control circuit and backlight. By applying 6 bit digital data,1680×1050, 16.7M-color images are displayed on
the 21.6” diagonal screen. Input power voltage is 5.0V for LCD driving. Inverter for backlight is not included in this
module.
4.4.1 General Features
4.4.2 Optical Characteristics
Ta=25℃，VCC=5.0V
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4.4.3 Electrical Characteristics
(1).TFT-LCD
(2).Backlight
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5. Block Diagram
5.1 Software Flowing 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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REMARK:
1) MCU initializes.
2) Is the EPROM blank?
3) Program the EPROM by default values.
4) Get the PWM value of brightness from EPROM.
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 EPROM.
Turn on the LED and set it to green color.
Scalar initializes.
10) In standby mode?
11) Update the lifetime of back light.
12) Check the analog port, are they’re 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 Main Board
Key Board Connector
(CN401)
Scalar TSUMU58WHJ
(Include MCU, ADC, OSD)
(U401)
Crystal
14.318MHZ
(X401)
EEPROM
M240C04
(
U403
)
D-Sub
Connector
(CN405)
EEPROM
M24C02
(U405)
R
G
B
RXD
TXD
Digital video
signal
EPR_SDA
EPR_SCL
LCD Interface
(CN101)
H
V
DVI
Connector
(CN406)
EEPROM
M24C02
(U404)
DB15_SDA
DB15_SCL
DDC_SCL_DVI,
DDC_SDA_DVI
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5.2.2 Power Board
DIM
DIM
EMI filter
Start Circuit: R904、R932、R933
PWM
Control IC
Transformer
AC input
12V
ON/OFF
Control
PWM
Control IC
Feedback
Circuit
Output
Circuit Transformer MOSFET
Over
Voltage
Lamp
ON/OFF
Over
Voltage
Protect
5V
Bridge
Rectifier
and Filter
Feedback
Circuit
Rectifier
diodes
CN902
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6. Schematic
6.1 Main Board
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