[TechAssist] Re: RCA P52937 / PTK195M3B Projo. no sound,FIX]
- From: <tvservice@xxxxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Mon, 25 Aug 2003 17:10:12 -0500
Phil,
when I have reinitialized eeproms with Chipper Check I always chose
"Gemstar Gold" and it worked ok
If it didn't you could always try again and select "Standard Gemstar"
Robert
tvservice@xxxxxxxxxxxxx
H & H Electronics Inc
Dallas, TX
----- Original Message -----
From: "Philip Bader" <tjanphyl@xxxxxxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Monday, August 25, 2003 4:18 PM
Subject: [TechAssist] RCA P52937 / PTK195M3B Projo. no sound,FIX]
>
>
>
> After hooking up my chipper check (an experience) I determined the
> eeprom was not at fault.I downloaded customer's EEPROM settings for safe
> keeping in the chipper check program.
> I noticed at the AC cord input the spark gap in the circuit board gad
> been hit hard.A good arc-over.
> Further inspection found the Stereo output amp IC U11901 had a small
> crack in it's body. Part# TDA7499/RCA# 235446. Replaced it, but still no
> sound. The IC's Vcc pin 3 was zero volts. Should be +31 VDC from source
> "+31Vs <20-B>".
> This 31 Volt source originates from SMPS transformer T14101 pin 11, thru
> diode D14116, thru 3 watt resistor R14153 (2 ohm,3W). My version did not
> show L14101 in paralell,must be a defferent version. The 2 ohm was
> open.Replaced resistor, +31V restored.
> Sound restored.
> Fix: U11901 audio output and Vcc source PS resistor R14153.
> Done.
> Philip Bader
> PS: a bit about chipper check:
> I downloaded the eeprom parameters for safe keeping,then wanted to
> "initialise" the eeprom to see if it became corrupted and this would
> restore sound.It asked me what software version the micro was running,
> "Gold program gemstar guide detected", does customer have "gold" or
> "standard"...
> GEEZ I did'nt know those things.Other items asked for yes/no answers
> before continuing.
> I assume this affected HOW the eeprom is initialised.I thought a wrong
> entry may cause troubles with certain options and functions, so I bailed
> out. Either this CC program is stupid, or I am.Thought it was supposed
> to look into the thing and find out for itself!
> Well, It's done.NO thanks to Chipper Check.
> P.B.
>
>
> Tried unplugging it, went into menu and made sure the speakers were
> selected "on".The sound OSD bar moves but no sound at all not a
> whisper.Picture seems unaffected.(slight bow or trapaziod was seen in
> home but that may be unrelated and almost un-noticable. Seemed to happen
> about a week after a major lightning strike near their home.
> Need input!
> Phil Bader
> --
> Philip Bader
> Jan Phyl TV Inc. (estab. 1976)
> 3420 Recker Hwy. Winter Haven, Fl. 33880
> Fax (863) 299-8821
> email: tjanphyl@xxxxxxxxxxxxxxx
> For Professional Technicians Only
>
>
****************************************************************************
*
> Classifieds! Buy or Sell!
> http://sell.tech-assist.org
> The Tech Address Book:
> http://www.tech-assist.org/secure/tip/contact.htm
> Add a Repair Tip Here, or Change/Remove your Email Address:
> http://www.tech-assist.org/secure/tip/main.htm
> Lost Password:
> http://www.tech-assist.org and select "Lost your Login Info?".
> Email Archives:
> //www.freelists.org/archives/techassist/
*****************************************************************************
Classifieds! Buy or Sell!
http://sell.tech-assist.org
The Tech Address Book:
http://www.tech-assist.org/secure/tip/contact.htm
Add a Repair Tip Here, or Change/Remove your Email Address:
http://www.tech-assist.org/secure/tip/main.htm
Lost Password:
http://www.tech-assist.org and select "Lost your Login Info?".
Email Archives:
//www.freelists.org/archives/techassist/
Other related posts:
