Acer Al1916c Manual

 30
Disassemble the power board 
1. Remove four screws to release power board. (Fig 10) 
2. Remove connector wire with power board and panel. (Fig 11) 
 
 
 
 
 
 
 
 
 
 
 
 Fig 10
Fig 11 

 
 
31
Disassemble the panel 
Remove four screws to release metal frame. (Fig 12) 
 
 
 
 
 
 
 
 
 
 
 Fig 12 

 32
Troubleshooting                                                                
This chapter provides troubleshooting information for the AL1916:   
 
1. No power 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Chapter 4
OK
No power

Press power key and look if the
picture is normal 
Please reinsert and make sure the
AC of 100-240 is normal 
Measure U701 PIN2=3.3V, U702
PIN2=3.3V 
Reinsert or check the 
power section 
X401 oscillate waveforms are
normal 
Measure CN701 PIN5/6=12V?...

 
 
33
2. No picture (LED is orange) 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
No picture 
OK 
OK NG
NG
Measure U701 PIN2=3.3V   
U702 PIN2=3.3V 
Replace U701, U702 
X401 oscillate waveforms are
normal 
Replace X401  
Check if the sync signal from
computer is output and video cable
is connected normally 
Input the sync signal of
computer, or change the
cable 
Replace U401 
NG
OK 

 34
3. Panel Power Circuit 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
4. Keypad Board 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
OK 
OK 
OSD is unstable or not working 
Is Keypad board connecting normally? 
Is Button Switch normally? 
Is Keypad board normally? 
Check main board 
Connect Keypad Board 
Replace Button Switch 
Replace Keypad Board 
OK 
NG
NG
NG
Check CN101 PIN 23-24 should have   
response from 0V to 5V When we   
switch the power switch from on to off
 
Replace panel 
Check the PPWR panel power relative...

 
 
35
5. PWPC 
 No Power 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Check AC line volt 110V or 220V 
OK
Check AC  line 
Check the voltage of C904(+) 
Check F901, bridge rectified circuit
 
Check start voltage for the pin3 of IC901 
Check R903, R904,IC901 
Check the auxiliary voltage is between 10V-16V 
Check IC901,T901 
Check ZD901, D903
 
OK
Check D910, D911, IC902 OK 
NG
No power 
NG
NG
OKNG 

 36
No Backlight 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Check C201 (+) =12V 
NG
OK 
Change F902 
Check Q203/D201 
Check ON/OFF signal 
Check Interface board  NG
OK 
Check U201 pin9=12V ? 
NG
OK Change Q201 or Q202 
Check the pin1 of U201 have saw tooth wave 
NG
OK Change U201 
Check D201 (-) has the output of square wave at short time. 
NG
OK CheckQ205/Q207/Q203/Q201or 
/Q206/Q208/Q204/D202 
Check the resonant wave of pin2 & pin5 for PT201/ PT202 
NG
Check the output of...

 
 
37
Connector Information                                                     
The following figure shows the connector locations on the monitor board: 
 
 
                                  
15
6
10
11 15
 
 
 
15 – Pin Color Display Signal Cable (D-sub) 
 
 
PIN NO.  DESCRIPTION  PI N NO.  DESCRIPTION 
1. Red 9. +5V 
2. Green 10. Logic Ground 
3. Blue 11. Monitor Ground 
4.  Monitor Ground    12.  DDC-Serial Data 
5. DDC-Return 13.  H-Sync 
6. R-Ground 14. V-Sync 
7. G-Ground 15. DDC-Serial Clock...

 38
FRU (Field Replaceable Unit) List                                            
This chapter gives you the FRU (Field Replaceable Unit) listing in global configurations of AL1916.Refer to this chapter 
whenever ordering for parts to repair or for RMA (Return Merchandise Authorization).   
 
 
NOTE: Please note WHEN ORDERING FRU PARTS, that you should check the most up-to-date information available 
on your regional web or channel (http://aicsl.acer.com.tw/spl/). For whatever reasons a part number...

  
39
Exploded Diagram (Model: AL1916)