[TechAssist] Re: Magnavox TV Model RK5556/27P1 chasis.No start problem.
- From: "Intrepid Video Support" <support@xxxxxxxxxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Thu, 5 Aug 2004 22:35:30 -0400
Mando,
From Tech Repair CD;
Magnavox\RK5554 27P1\Had shorted Horizontal output\\\27P1\Q502 (2SD1555*
Philips# 483513047835)*Q420
(Philips# 483513047068)*R424 (0.27 ohm / 1 watt* Philips# 483511657056)*C430
(1000pf* 400V* Philips#
483512147034)\D430 (MUR460* Philips# 483513037488)*R429 (24 ohm / 3 watt*
Philips# 483511657043)*IC401
(Philips# 483520987071)\C504 (10nf / 1.5KV* Philips# 483512147048)*C505 (680pf
/ 2KV* Philips#
483512247037)\Change R427 and R428 regardless of how they read. These are
current sense and usually go off
value when Q420 shorts. Don't measure them* just change them\\\\\
Jeff
--
Intrepid Video TV/VCR Repair
263 S Front St, Steelton PA 17113
717-939-7708; (F) 717-564-4952
www.intrepid-video.com www.tech-repair.net
----- Original Message -----
From: "armando guerra" <birdie@xxxxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Wednesday, August 04, 2004 11:08 PM
Subject: [TechAssist] Magnavox TV Model RK5556/27P1 chasis.No start problem.
This set came in dead.No relay action at all.Fuse is ok.I can't find my
sm for this set but while checking around ,I found R 429 open and C430
shorted. I used a 24 ohm for 429 and a 1000pf\400v cap for 430.Also
resoldered alot of cold solders which is very common on this
chasis.Still no relay click at all.Just going from memory,I think that
IC380 is the 5v reg.I checked for the vcc coming in to the ic but its
very low.its only 2.7v.The IR and pin 42 of the micro is also at 2.7v
instead of the 5v.Can someone please send me a pdf file of the power
supply on this tv so that I can locate the missing voltages.I told the
customer that it was already 14yrs old but she said that if I could fix
it,she would apreciate it very much since it was her husband's favorite
tv.He passed away last yr.
Thanks for your help.
Mando
Birdie's TV & Electronics
Casa Grande, AZ
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