DOWNLOAD LG 42PG6300-ZA (CHASSIS:PD85A) Service Manual ↓ Size: 122.18 MB | Pages: 73 in PDF or view online for FREE

Model
42PG6300-ZA (CHASSIS:PD85A)
Pages
73
Size
122.18 MB
Type
PDF
Document
Service Manual
Brand
Device
TV / Plasma
File
42pg6300-za-chassis-pd85a.pdf
Date
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­17­
       
TROUBLE SHOOTING GUIDE
 
 
1.  No Power                                               
-  Check the condition of the SMPS input and power cable connection.                        
- 
Check the system clock (16MHZ) and the reset terminal of CPU. 
Change SMPS B/D
Check 5VSTB of L570
Fail
Pass
No Power
(LED indicator off)
Check the signal(Stby_en) of Q569
Re-soldering or Change  the 
defect part(U1, Y1,Q569)  
Fail
Pass
Check the signal(LED_B,R) of JP566 
Re-soldering or Change  the 
defect part(U1, Y1)  
Fail
Pass
Check IR & LED B/D Assy 
Change IR & LED B/D Assy
Fail
Check JP566, JP567 Connection
Pass
Check PANEL_ERROR
Pass
Check Panel B/D or SMPS
Fail
 
 
­18­
       
2.  No Display                                         
- 
Check the system clock (27MHZ, Y171) and the Voltage of VCTP_P(U81)             
Check +5V of U566
Pass
Repeat A Process
Check +3.3V, +2.5V,+1.5V
Re-soldering or Change  the 
defect part(U37,U33,U31)  
Fail
Pass
Check +1.25V,VDD_CORE,VDD_H
Re-soldering or Change  the 
defect part(U35,U34,U36)  
Fail
Pass
Check the input/Output of U81
Fail
Change U566
Fail
Re-soldering or Change  the defect 
part(U81,Y171)  
Pass
Check Panel Votage (Vs & Va )
Fail
Adjust Panel Votage (Vs & Va )
Pass
Check LVDS Cable or PDP Module
Fail
Change LVDS Cable or PDP 
Module  
Check input source cable or jack
Pass
Pass
 
 
­19­
       
3.  No Display – Component Input                    
-  Check the condition of the Component cable connection.                        
- 
Check the system clock (27MHZ,Y171) and the Voltage of VCTP_P(U81) 
Check the signal(Y,Pb,Pr) 
input/output of U351
Pass
Repeat A, B Process
Check the signal input/output of U81
Re-soldering or Change  the 
defect part(U81)  
Fail
Pass
Re-soldering or Change the defect 
part(U351)  
Fail
Check input source cable or jack(JP351)
Pass
 
 
­20­
       
4.  No Display – PC Input                    
-  Check the condition of the PC cable connection.                        
- 
Check the system clock (27MHZ,Y171) and the Voltage of VCTP_P(U81) 
Check the signal(R,G,B)
 input/output  of U351
Pass
Repeat A, B Process
Check the signal input/output of U81
Re-soldering or Change  the 
defect part(U81)  
Fail
Pass
Re-soldering or Change  the 
defect part(U351)  
Fail
Check input source cable or jack(JP376)
Check the signal(H/Vsync) 
input/output of U376
Pass
Re-soldering or Change  the 
defect part(U376)  
Fail
Pass
Pass
 
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