[TechAssist] Re: Magnavox model FP5230W104 -Ch # PTV620-AH01 Blows Hot
- From: "Gemini Computer & TV" <geminitv@xxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Thu, 08 Sep 2005 07:45:38 -0400
Symptom: PTV610 through PTV620 repeat shorting of Q906 and opening of R934.
Q906 is the High Voltage output transistor and R934 is in series with Q906
(both on the Signal/Deflection module).
CAUSE: In several cases, the cause has been a shorted blue CRT. Often the
faceplate of the CRT is cracked at one of the
mounting ears, which drastically reduces the vacuum inside the CRT leading
to HV short.
SOLUTION: Check for a cracked blue CRT if Q906 is found shorted on the
Signal/Deflection module before replacing Q906 or installing a new
Signal/Deflection module.
Replace the CRT if it is cracked. Remember to replace R934 if Q906 is
shorted.
Note: Fluid leaked onto the Combo block can also cause Q906 to short. Also,
if the second anode lead hole in the anode cap of any of the 3 CRT's is not
filled with RTV, the high voltage can arc out of the unsealed hole and blow
Q906.
Bob Waterman, CET® #RI-28
Master Technician License #9109
Service Manager / Parts Manager
Gemini Computer, TV, & Security Alarms
(508)695-7302
(508)695-7769 FAX
geminitv@xxxxxxxxxxx
----- Original Message -----
From: "Eric Manuel" <tvman@xxxxxxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Thursday, September 08, 2005 7:42 AM
Subject: [TechAssist] Magnavox model FP5230W104 -Ch # PTV620-AH01 Blows Hot
Hi Iam posting this for Pete .Can you help him as it seems he is not
recieving mail from Tech Assist since he lost power for 6 days.
I will send any replies to him..See his post on the problem below..Eric
Paste from Pete Perdomo.
--Miami, Fl.
I'm working on a projo Magnavox model FP5230W104
chassis # # PTV620-AH01. On this tv I have replaced Q802 horizontal
output transistor, 3 times, and them short out at on. (On the first one
it play for 15 minutes) . have resolder almost all the board, replaced
flyback txmer, resolder drive txmer etc etc...
I'll appreciate your help, and if you can plz post this to the group
Thanks many many thanks for your att. to this matter.
Eric
E M Electronics
59 Wights Rd
Deer Lake NL
Canada
A8A 2J2
Ph# 709 635 2627
tvman@xxxxxxxxxxxxxxx
----------------------------------------------------------------------------
-
This Email List is accessible to the general public through search engines.
Remove: http://www.tech-assist.org/remove.htm
Set Vacation
mailto:ecartis@xxxxxxxxxxxxx?subject=set%20techassist%20vacation
Lost Password: http://www.tech-assist.org and select "Login Problems?".
Email Archives: //www.freelists.org/archives/techassist/
-----------------------------------------------------------------------------
This Email List is accessible to the general public through search engines.
Remove: http://www.tech-assist.org/remove.htm
Set Vacation mailto:ecartis@xxxxxxxxxxxxx?subject=set%20techassist%20vacation
Lost Password: http://www.tech-assist.org and select "Login Problems?".
Email Archives: //www.freelists.org/archives/techassist/
Other related posts:
