[TechAssist] Re: RCA CTC187cn Dead - Micro?
- From: "Barry Thompson" <barrystv@xxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Sun, 7 Sep 2003 11:14:21 -0400
Hi Al: I have the trouble shooting guide for that set. Maybe you overlooked
something in the sys control. Its less then 2 megs.I had a bad micro on a
ctc 187, it was flashing little white squares all over the pix.I understand
you have email limitations because you are in the country. I can email it or
upload it to the members area. Let me know. Barry
barrystv@xxxxxxx
Barrys TV
613 224 3406
Ottawa.Canada.
----- Original Message -----
From: "Al Gutz" <alg@xxxxxxxxxxx>
To: "tech assist" <techassist@xxxxxxxxxxxxx>
Sent: Saturday, September 06, 2003 11:23 PM
Subject: [TechAssist] RCA CTC187cn Dead - Micro?
>
> Have a 187 dead. HOT not shorted, smps OK, all 5V and 12V supplies good.
>
> On IC3001 (micro) pin 5 KD1 should be low 0V with positive pulse, this
> is running at 2.5V no pulse. pin 6,7,8 KS1, KS2, KS3 are running at 2.5V
> should be 4.7V. Unpluged keypad so no shorted switches. The wave form on
> the crystal at pins 36,37b is good. No other waveforms on micro, supply
> V is at 5V. Replaced eeprom.
> Am I looking at a bad micro, want to be sure because it will likely cost
> more than the set is worth but I have never ran into a bad micro on
> these before.
> Thanks for any help
>
> Al G
> Al's TV-Electronics
> Pembroke Ont.
> Canada
>
>
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