[TechAssist] Re: Acer monitor 7176IE hor. drive not getting through

Try this site for schematic: http://rv6llh.rsuh.ru/shema.htm

SR Lötter
Computer Support Solutions
East London
RSA
+2782 7887 162

----- Original Message -----
From: "James M. Knoble" <jmk1938@xxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Tuesday, April 30, 2002 1:56 PM
Subject: [TechAssist] Re: Acer monitor 7176IE hor. drive not getting through


>
>
>
> How can I get a copy of that schematic.I have three of these monitors that
> need repaired.
>
>
> At 04:33 PM 4/22/02 -0400, you wrote:
>
> >This is an Acer 17" monitor model 7176IE. There is no hi voltage. The
> >green light on the front operates as normal. When the computer goes into
> >standby, the green light turns to amber. When the computer is awakened,
> >the light goes back to green. Hear a relay clicking and the power supply
> >running but thats it. I do have a schematic.
> >
> >I get a hor. rate square wave coming out of IC304 pin 7, 1.5V p-p. By
> >the time this signal reaches the gate of Q307 (IRF630) hor. driver, the
> >pulse is 0.8V p-p. There is 22.7 DC  Volts on the drain of Q307. Also,
> >all the other B+ lines appear to have proper or very close to proper
> >voltages. Should the amplitude of my hor. drive pulse high enough to
> >drive Q307? If so, why isn't the Mosfet conducting? If the pulse is too
> >low, is this monitor in some type of shutdown mode where it is not
> >allowing the pulse to be a greater amplitude?
> >
> >Have changed Q307 and Q303, no differnce in operation. Also soldered
> >anywhere on the board that didn't look the best. HOT Q306 doesn't check
> >shorted.
> >
> >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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