[TechAssist] Re: Philips TV TS3260-C121, dead

Sent 8 pages by fax, are they readable?
Jim Myers
jr.myers@xxxxxxxxxxx
----- Original Message ----- 
From: "Gary McCartney" <number63@xxxxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Sunday, December 30, 2001 6:06 PM
Subject: [TechAssist] Philips TV TS3260-C121, dead



This is a brand new tv that was in an accident. There were approx. 10
traces I had to jump because of small cracks in the board. I have gone
over it thoroughly to make sure there are no more cracks and that my
wiring was properly done. (even still, I leave the possibility open)

There are 3 large IC's. The micro, IC7600 has a 12 Mhz crystal which is
oscillating at the correct frequency. When I push the power button, pin
15 of this IC goes LO from 4.8V to 0V. I can't find any other pin which
changes state during the power button process. I do get 4.8V on a number
of pins and 6.5V on a couple. 

The other large chips are IC7833 and IC3217. They have 18 Mhz and 3.58
Mhz crystals respectfully. Neither of these crystals oscillate. I do get
4.8V on a few pins and 6.5V on a few pins for both these IC's.

On the eeprom, I get 4.8V or 0V on the pins. I have swapped the eeprom
from another set same model.

I measure 129V B+ on HOT collector and hor. driver collector. I also get
13.7V on C2577 and 8V on C2561- these are off the SMPS transformer.

There is no hor. oscillator pulse going to base of hor. driver, and nor
is it back at IC3217.

I've gone about as far as I can without a schematic to tell me which
pins on the IC's should have B+, etc. I do have a couple more of these
chassis, but the boards are broken too far to repair, however I can
steal the parts to repair the one I'm working on.

Would anyone have the portion of the schematic I need? Couldn't find a
listing on Sams web site.

Thanks for any help.


Gary McCartney

McCartney Electronics
7134 Fife Rd, RR 7
Guelph Ontario Canada N1H 6J4
Fax: (519)821-1530
email: number63@xxxxxxxxxxxxx
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