Thanks John. I'm happy to send along all my original files for anyone
that wants to update that Cine FAQ.
Surely you have a lot of free time now that you are living off your
Tron Legacy game supply residuals?
tm
On 1/18/2011 1:15 PM, John Robertson wrote:
> A couple of quick notes:
>
> First - *Safety Check*:
>
> *These monitors do NOT have any X-Ray protection circuitry* so it is
> very important that you verify the +/- 18 volt regulators are working by
> checking for +18VDC at L1 and -18VDC at R87 or C32. When either
> regulator fails the voltage goes from approx 18KV to 24KV, if both fail
> the HV could go as high as 30KV. So it is rather important to check this
> out...
>
> Second - common problems:
>
> A) Popping breakers. We are assuming here that you have diode checked
> all the diodes and transistors including the short circuit protection
> transistors Q9, 12, 2 & 11 and none are shorted.
>
> 1) Unplug yoke (removes load from output transistors), power up, and
> check the voltage @ the emitters of Q17 and Q13 - this voltage must be
> very close to +0.6VDC. If off then replace all three 2N5210s (cheap and
> quick fix) as it isn't worth the time to figure out which one has failed.
>
> 2) If emitter voltages are good then check collector of Q8(Q3) - should
> be close to 0.8VDC, and the voltage at the collector of Q7(Q4) should be
> approx -1.3VDC. If the voltage of Q7(Q4) is not within 0.6VDC of the
> voltage at Q8's(Q3) collector, then replace diodes CR15 - CR17 (CR4 -
> CR6) and try again.
>
> B) Missing voltages from HV transformer - check (be gentle here the
> wires are fragile!) all the very fine wires for breaks at the solder tie
> pins. If broken then burn off the insulation with a lighter, and add a
> small extension wire to the pin then solder the cleaned fine wires to
> this. Leave a bit of flex room for the wires by have a small bend in the
> fine wires to avoid future breakage.
>
> Hope this helps someone, these are problems I found with two monitors I
> just fixed and the Vectorbeam monitor book
> (Vectorbeam_Cinematronics_Monitor_cine_faq_v096.PDF) needs to be updated
> some day...
>
> John :-#)#
>
> --
> John's Jukes Ltd. 2343 Main St., Vancouver, BC, Canada V5T 3C9
> Call (604)872-5757 or Fax 872-2010 (Pinballs, Jukes, VideoGames)
> www.flippers.com
> "Old pinballers never die, they just flip out"
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Received on Tue Jan 18 14:47:56 2011
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