Acer V193w Service Guide

							 
31   
Troubleshooting                                                                                                                            
This chapter provides troubleshooting information for the V193W:   
1. No Power 
     
          
  
 
         
                                                                                                                                     
 
 
   
  
           
   
Chapter 4 
No power 
Press power key and look if the  
picture is normal 
Please  reinsert  and  make  sure  the  
AC of 100-240 is normal 
Reinsert or check the  
power section 
Check  if  X401  oscillate  
waveforms are normal 
Measure U404 Pin2=3.3V,   
OK 
OK  NG 
NG 
NG 
Measure CN404 
Replace U401 
Replace X401 
NG 
Replace U404 
OK 
OK  
						

							 
 
32 
2. No Picture (LED is orange) 
 
   
                        
 
 
No picture 
The button if under  
control X401 oscillate 
waveform is normal 
Replace U401 
Replace X401 
Measure U404 Pin2=3.3V,     
Check  Correspondent  
component 
 
Replace U401 
X401 oscillate 
waveform is normal 
Replace U404 
OK  OK 
OK 
OK 
OK 
NG 
NG 
NG  NG 
Check reset circuit of  
U401 is normal 
Check HS/VS from  
CN101 is normal 
Replace X401 
Check Correspondent  
component 
 
NG 
NG  OK  
						

							 
33   
3. Panel Power Circuit     
 
   
            White screen 
Measure  Q404  base  
is low level? X401 oscillate  
waveform is normal 
Check CN403 is solder  
and Q404,Q405 is OK? 
Check Correspondent  
component.  
Replace PANEL 
Check Correspondent  
component. 
Replace U401 
OK 
OK  OK 
Replace X401 
OK 
NG 
NG  NG 
NG 
Check reset circuit of  
U401 is normal  
						

							 
 
34 
4. Key Board 
 
 
                   
 
    
OSD is unstable or not working 
Is Key Pad Board connecting normally? Connect Key Board 
Is Button Switch normally? Replace Button Switch 
Y 
NG 
NG 
Is Key Pad Board normally? Replace Key Board 
Y 
NG 
Y 
Check Main Board 
  
						

							 
35   
5. Power Board    
No power  
Check to CN902 Pin10,11 =14V and Pin6,7 = 5 V OK
 Check Interface board 
Check AC line volt 120V or 220V 
Change F901, Check BD901, L901, IC901 
Check the voltage of C905(+) 
Check    bridge retified circuit 
Check start voltage for the Pin2 of IC901 
Change IC901 
OK 
Check the auxiliary voltage is smaller than 20V OK
 
NG 
No power 
NG
 
NG 
OK 
Check T901,D906, D907, Q903,ZD921,ZD922,IC904,IC903  
Check IC901 
 
NG 
OK
 
NG  
						

							 
 
36 
W/LED No Backlight  
 
   
                
 
     
   
          
Check the 14V voltage input 
Check the adapter 
 
Check ON/OFF signal 
Check Interface board 
Check IC801 pin12=12V? 
Change Q805.Q808 or Q810 
Check the pin9&10 of IC801 have PWM wave 
Change Q801/Q804/Q811/Q812 
Replace IC801 
Check  the  resonant  wave  
of pin3 & pin7 for T801 
Check the output of T801,T802 
 
Check Q802/Q803 
Check connecter & lamp  OK
 Change T801,T802 
OK 
OK 
 
OK
 
OK 
OK NG 
NG 
NG 
NG 
 
NG 
NG 
OK  
						

							 
37   
Connector Information                                                                                                                          
The following figure shows the connector locations on the monitor: 
 
 
                  
 
Chapter 5    
						

							 
 
38 
FRU (Field Replaceable Unit) List                                                                                      
This chapter gives you the FRU (Field Replaceable Unit) listing in global configurations of V193W.Refer to this 
chapter whenever ordering for parts to repair or fo r RMA (Return Merchandise Authorization).   
    
NOTE:  Please note W HEN ORDERING FRU PARTS, that you shou ld check the most up-to-date information 
available on your regional web or channel (http://a icsl.acer.com.tw/spl/). For whatever reasons a part  number 
change is made, it will not be noted in the printed  Service Guide. For ACER AUTHORIZED SERVICE 
PROVIDERS, your Acer office may have a DIFFERENT pa rt number code from those given in the FRU list of 
this printed Service Guide. You MUST use the local  FRU list provided by your regional Acer office to order 
FRU parts for repair and service of customer machin es. 
 
NOTE:  To scrap or to return the defective parts, you shou ld follow the local government ordinance or regulat ions on 
how to dispose it properly, or follow the rules set  by your regional Acer office on how to return it. 
    
Exploded Diagram (Model: V193W) 
Chapter 6   
						

							 
39   
Part List 
Above picture show the description of the following component. 
 
Item  Picture  Description 
1  
 
 
Base 
2  
 
   
Main Frame 
4    
 
  Panel     
						

							 
 
40 
 
 
5     
 
   
Power Board   
6 
  Main Board