View previous topic :: View next topic |
Author |
Message |
berniedd
Joined: 13 Dec 2006 Posts: 4
|
Posted: Wed Dec 13, 2006 5:30 pm Post subject: Need Schematic for Sharp 21v-u63 CRT tv |
|
|
Hi guys. I need a schematic for Sharp 21V-U63. It showed vertical sweep collapse (horizontal line only) and shortly became dead. I've already replaced the shorted HOT and also the Vert output IC. Flyback tested OK on a FBT tester (even good HV spark). I've also replaced the Chopper IC on the main power supply board, but still the set emits a high pitched soft whine from the power supply PCB. Components in and around the horiz and vert sweep circuits are OK. So are those on the main power supply board. Thanks in advance. |
|
Back to top |
|
|
berniedd
Joined: 13 Dec 2006 Posts: 4
|
Posted: Sat Dec 16, 2006 2:33 pm Post subject: |
|
|
addendum: Found other problems in the power supply board- shorted power zener R2KN, bad error voltage amplifier SE120. I just don't understand how these things fail from the original bad vertical output IC which caused the HOT to overheat since the IC gets its B+ from the flyback. Just a fluke maybe? |
|
Back to top |
|
|
|
|
|
You can post new topics in this forum You can reply to topics in this forum You cannot edit your posts in this forum You cannot delete your posts in this forum You cannot vote in polls in this forum
|
eServiceInfo on FB -
Service Manuals Free Download -
Service Diagrams
Free TV Schematics Download -
HARDW.net -
Pinout Master -
Jabse Service Manual Search -
Jabse.InK -
onTap.bg
SnimkiOt.com -
Poblizo.com : пътешествия
Latest Service Manuals :
ipb080n06ng ipp080n06ng rev1.05 Infineon • KRC28 Kenwood • 99t2 LG • te3.1e-pt190r-sema Philips • tx p42u10be panasonic • compal la-7912p r0.3 schematics acer • hfe avr-1700 service DENON • CT-M486MK2 teac • power-inverter dps-279 37-42coll lcd Phi • Aspire 5110 5100 3100 & travelmate 5510 •
|