Acer AL1702 Support Question
Acer AL1702 Support Question
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Question posted by aamruthchanooju on August 5th, 2013
Price Of Al1702w Monitor
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Related Acer AL1702 Manual Pages
AL1702 Service Guide - Page 1
Service Manual
17-inch LCD Monitor AL1702
AL1702 Service Guide - Page 2
..., reproduced, translated, or converted to any electronic or machine readable form without prior written permission of their respective owners. Service Manual Versions and Revision
N o.
ACER AL1702 Service Manual. Trademarks
LiteOn is a registered trademark of LiteOn Technology Corp. Ve rs ion
1.
1.0
Release Date May 12, 2004
R e vis ion O riginal release
Copyright
Copyright...
AL1702 Service Guide - Page 3
No display of screen (Screen is black, color of LED is green 12 3. AL1702 1) Circuit Description
1. Others 7 4.1 Detection of POWER switch status 7 4.2 Display mode identification 7 4.3 Power ON sequence 8 4.4 Power OFF sequence 8 4.5List of I/O Pin Assignments of LED is amber ...
AL1702 Service Guide - Page 4
... 19 8 Checking the resolution change IC movement 20 9. Abnormal plug and play operation 18 7. Power board 24
3) Spare Parts
Recommended Spare Parts List 25
Page 2 AL1702
6. Checking the DC/DC converter circuit 21 10.
AL1702 Service Guide - Page 5
..., ZD801 conducts, pin 3 of C801, T801, C802, C803, C804. Then oscillation of I803 gets more bias, accordingly photo transistor and photo diode flows more current. AL1702
1) Circuit Description
1. I801 starts to oscillate and outputs a pulse train through pin 6 to drive Q803. 1.7.2 OPP : When Q803 turns on, C805 supplies a linearly increasing triangle...
AL1702 Service Guide - Page 6
...: I101 (OZ960S)
2.2.1 Enable : When pin 3 of I101 is latch function. 2.4 2.4.1 Output drivers: The configuration prevents any shoot-through both pin1 and pin 2 of lamp current. AL1702
2.
AL1702 Service Guide - Page 7
...MCU is 14.318 MHz. and H/V sync to LCD module. It can programmed scaler, control power save sequence for the LCD monitor. These interpolation digital data are transformed to clamp the black level at 0V. The device control signal is LVDS bus, output to...a 12V power supply for audio function. Based on this conversion, this device performs interpolation during pixel extension. AL1702
3.
AL1702 Service Guide - Page 8
...Enter / withdraw from I307 MCU. The I309 will off DDC_CLK and DDC_DAT signal, when LCD monitor is turned "L".
Whether the switch has been pressed is identified with the switch input level that...bus SCL (pin14) and SDA (pin13) of audio power, and through DDC2Bi bus control LCD monitor. Page 6 AL1702
3.5.3 X302 crystal The X302 crystal is 11.0592MHz, support the operated clock to the MCU.
3.5.4...
AL1702 Service Guide - Page 9
... I307 MCU. I311 pin 12 is audio input port. If there is no horizontal sync signal input. If there is no vertical sync signal input.
AL1702
3.6 Audio (Circuit diagrams MAIN PWB 8 of 8) [OPTION] 3.6.1 P309 connector The audio signal input received from the audio input terminal P309 from the jack input of...
AL1702 Service Guide - Page 10
... Width (MHz)
28.322 25.175 30.24 31.5 31.5 36 40 50 49.5 57.28 65 75 78.75 108 108 108 135
Polarity H V
AL1702
Table 3 the Hsync, Vsync distinction
Indication resolution 720 x 400 640 x 480
800 x 600
832 x 624 1024 x 768
1152 x 864 1280 x 960 1280 x 1024 1280 x 1024...
AL1702 Service Guide - Page 11
...
LED_G (LED)
PANELVCC_EN (Panel VCC)
90 ms 350 ms
PCLK/DATA (LVDS bus)
BKLT_EN (Backlight Power)
316ms 90 ms
AUDIO_EN (Audio VCC)
1.55 sec
Page 9 AL1702
4.3 Power ON sequence When the POWER switch is pressed, the POWER OFF signal is turned"H".
AL1702 Service Guide - Page 12
Audio volume control
AL1702
Page 10 Port
Signal Name
Initial
Function
Setting
3
P5.0 KEY_POWER
H ON/OFF monitor power
2
P5.1 KEY_MENU
H OSD enter/exit enable
1
P5.2 KEY_PLUS
H OSD right enable
42
P5.3 KEY_MINUS
H OSD left enable
41
P5.4 KEY_DOWN
H OSD down enable
38
...
AL1702 Service Guide - Page 13
1. No When a sugnal isn't being inputed, it is connected
normally.
NG OK
Input the sync signal of the frequency that it is amber)
AL1702
Does OSM display when you push PROCEED buttom. Proceed "No OSM display" section. Check if the sync signal from computer is output and if the ...
AL1702 Service Guide - Page 14
... the backlight unit" section"
Does computer output RGB video signals? NG OK
Proceed "Abnormal sreen" dection"
Check if the LCD video signal cable is green)
AL1702
Is backlight lit? NG OK
Check the video cable for output signal with all black only.
1)Change pattern of LED is connected between the MAIN...
AL1702 Service Guide - Page 15
... wire broke between P301 pin1, 2 and I302. 2) Check power board. NG OK
Check if the voltage on I302 pin3 that is failure
Page 13 Continue
AL1702
Check the 3.3V power are supplied on I302, pin2, 4.
NG OK
Failure Point
1) Printed wire broke between P301 pin1, 2 and I302. 2) Check power board...
AL1702 Service Guide - Page 16
..., 2, 3, FB304, and P301 pin1, 2.
Check the P305 all LVDS signals. Failure Point
1) Printed wire broke between P305 and LCD module. 2) LCD module is failure. Continue
AL1702
Check the 5V power are supplied on P305 pin 1, 2, 3 (to the LCD panel)
NG
Check if theVoltage on I312 pin,1 that is DC power at...
AL1702 Service Guide - Page 17
Page 15 Checking the back light unit
AL1702
Is +12V supplied to inverter PWB ? (by the power board)
NG OK
Failure Point
1) Inverter cable disconnection. 2) Power board failure. Check the BKLT_ADJ signal of ...
AL1702 Service Guide - Page 18
... output from I305? NG OK
Check all LVDS signals being output to 0.7Vp-p. Page 16
Failure Point
In the case of video connector.
Abnormal screen
AL1702
Check the R, G, B video signal from computer input on I305 pin63, 60, 58 respectively that their level is short or open . 5) C332 is 0.5
to P305 from...
AL1702 Service Guide - Page 19
... P308 pin3, 4, 5, 6. (normal is
high level, when push buttom, generated low level plus )
NG OK
Failure Point I307 is failure. Abnormal OSM display adjust problem
AL1702
Check the input TTL level whether was changed when pressed function keys on the I307 pin1, 2, 41, 42. (normal is high level, when push buttom...
AL1702W Service Guide - Page 7
... MTBF target is 50k hours or more desktop space, and comparing to the traditional CRT monitor, it consumes less power and gets less weight in stereo audio amplifier with the latest LCD... 17" MICROPROCESSOR based Multi-mode supported high resolution color LCD monitor. It is designed with OSD control to drive a pair of AL1702W
Panel Signal Interface Sync Type Color Temp User Adjust DDC Speaker...
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