[TechAssist] Re: Zenith Z52Z95D8 9-1674 SWEEP 9-1690 CONVERGENCE. update
- From: "al m" <ampm@xxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Sun, 23 Jan 2005 10:04:11 -0500
If someone gets a 9-1690 convergence board in, could you please let me know
if the blue convergence heatsink should be running hotter than the red one.
Mine is running at 138f deg..
Al Marquardt
ampm@xxxxxxx
Al Marquardt Electronic Repair
206 W Main
Girardville Pa. 17935
----- Original Message -----
From: "al m" <ampm@xxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Wednesday, January 19, 2005 4:18 PM
Subject: [TechAssist] Re: Zenith Z52Z95D8 9-1674 SWEEP 9-1690 CONVERGENCE.
update
>
> This set the blue convergence was replaced with a STK392-180. The picture
> is
> good but the heat sink that the IC is on is measuring 139Fdeg. The red
> heat
> sink is a lot cooler. I have changed all caps on the board and checked all
> the other components. There is a -5V regulator on this heat sink. The
> voltages are all correct on the board. Could this heatsink be running
> hotter
> than the other one because of the -5V regulator? Could this be normal? All
> the heat seems to come from the -5V regulator. When I measure the temp on
> the IC it is cool but on the regulator it is 138F. Am I chasing a ghost
> again with this being normal? Thanks.
> Al Marquardt
> ampm@xxxxxxx
> Al Marquardt Electronic Repair
> 206 W Main
> Girardville Pa. 17935
> ----- Original Message -----
> From: "al m" <ampm@xxxxxxx>
> To: "tech assist" <techassist@xxxxxxxxxxxxx>
> Sent: Saturday, January 08, 2005 11:44 AM
> Subject: [TechAssist] Zenith Z52Z95D8 9-1674 SWEEP 9-1690 CONVERGENCE.
>
>
>> This set had no power. I replaced the B+ diode and the set ran but the
>> blue
>> convergence was off. Changed the blue convergence IC ( STK392-110 with
>> STK392-180). The Ic's are running hot. How hot are these supposed to run.
>> I
>> can keep my finger on it but it is hot. I may have something more wrong
>> with
>> the power supply.
>> Al Marquardt
>> ampm@xxxxxxx
>> Al Marquardt Electronic Repair
>> 206 W Main
>> Girardville Pa. 17935
>>
>>
>>
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