LC-42X20E (serv.man13). Power Supply fails to start - Sharp TV Technical Bulletin (repair manual)

lc-42x20e (serv.man13) technical bulletin
Model
LC-42X20E (serv.man13)
Pages
1 Few pages! See other manuals at the bottom of the first or last page.
Size
144.88 KB
Type
PDF
Document
Technical Bulletin
Brand
Device
TV / LCD / Power Supply fails to start
File
lc-42x20e-sm13.pdf
Date

Read Sharp LC-42X20E (serv.man13) Technical Bulletin online

LCD 2012 11 01 
 
Date of Issue:      5
th
 November 2012 
         
Classification: 
White 
LCD TELEVISION TECHNICAL BULLETIN
 
Page 1 of 1 
 
 
Sharp Electronics (UK) Limited 
Reference – MB26102012
 
Revision  - 1 
 
White – Carry out as required 
Yellow – Carry out as required and whenever the unit comes in for service 
 Red – Carry out on all units   
 
 
MODELS
 
LC32X20E LC37X20E LC42X20E LC46X20E 
 
LC37B20E LC42B20E LC37XL8E LC52X20E 
 
SYMPTOM 
Intermittent power on and LEDs flashing 2 x Red 3 x Green.
 
 
CAUSE
 
R7832/R7833/R7834 reducing in resistance over time. 
 
ACTION 
Check the voltage across the main smoothing capacitor should be about 350V during 
Standby and increases to 395V during power on and normal operation, if it does not 
change or is low replace R7832 R7833 R7834 511K ¼ watt 1%. 
 
 
 
These are commercially available components and can be ordered from R.S using 
their stock code number 6792203P (packed in 50s) 
 
 
REF NO DESCRIPTION PART 
NUMBER PRICE 
CODE 
R7832/3/4 511KΩ 1%  
Commercially available 
 
 
 
 
 
 
 
            “40/46/52” Models                                                  “32/37” Models 
 
 
Figure 1: Location of R7832/33/34 on underside of PSU PWB. 
Display

Download Sharp LC-42X20E (serv.man13) Technical Bulletin

Here you can read online and download Sharp LC-42X20E (serv.man13) Technical Bulletin in PDF. LC-42X20E (serv.man13) technical bulletin will guide through the process and help you recover, restore, fix, disassemble and repair Sharp LC-42X20E (serv.man13) LCD. Information contained in service manuals typically includes schematics / circuit diagrams, wiring diagrams, block diagrams, printed wiring boards, exploded views, parts list, disassembly / assembly, pcb.