[TechAssist] Re: RCA F19431, ch# TX809D storm. no power up, has stby volts
- From: "al m" <ampm@xxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Thu, 12 Aug 2004 12:02:45 -0400
Phil I have a TX808 are they close?
Al Marquardt
ampm@xxxxxxx
Al Marquardt Electronic Repair
206 W Main
Girardville Pa. 17935
----- Original Message -----
From: "Phil Bader" <tjanphyl@xxxxxxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Thursday, August 12, 2004 11:58 AM
Subject: [TechAssist] RCA F19431, ch# TX809D storm. no power up, has stby
volts
> Customer claims this went dead after storm. Fuse OK, no signs. The smps
> does seem to sound too raspy for my taste, but seems to be working,
> here's some voltages:
> diodes around the secondary of the smps txfmr: (measurements indicate
> output, usually @cathode):
> DP61 +10.8v
> DP93 +6.74
> DP63 +12.25V
> DP97 -15.71V
> DP65 +11.53V
> HOT coll: +112VDC
> IP330 (L7809) input: +10.87V, out: +8.89V
> IP301(7806A) in: +10.08V, out: +5.93V
> Transistor: TP315 (TO-220) coll: +6.85V B&E: zero V
> I/R det eye: one leg: +5.1V
> I need some other points to see if there is a Vcc at micro, eeprom,etc.
> I did change the 4 pin opto-iso in the PS as a test, no help.
> It appears to be in standby, but probably a shorted IC somewhere
> dragging a source down.
> BTW I removed the tuner incase it was the cause. No help.
> Phil Bader
> PDF anyone?
> Thanks, Phil
>
> --
>
> Philip Bader
> Jan Phyl TV Inc. (estab. 1976)
> 3420 Recker Hwy. Winter Haven, Fl. 33880
> Fax (863) 299-8821
> email: tjanphyl@xxxxxxxxxxxxxxx
>
>
>
> --------------------------------------------------------------------------
---
> Lost Password:
> http://www.tech-assist.org and select "Login Problems?".
> Email Archives:
> //www.freelists.org/archives/techassist/
>
>
-----------------------------------------------------------------------------
Lost Password:
http://www.tech-assist.org and select "Login Problems?".
Email Archives:
//www.freelists.org/archives/techassist/
Other related posts:
