Re: 19K6100 MONITOR B+ VOLTAGE is LOW.

Looks to be a 13v 1w Zener. 1N4743

JB

Stempak Arcadius-ASTEMPA1 wrote:

> Joe,
> ****
>
> Thanks for the reply, I appreciate it.
> Any idea what ZD 901 (Diode) should actually
> be (Part wise) ??? Also know of any other
> type of Diode which can be substituded for this
> particular one, as I do not believe that I have
> a Spare ???
>
> Thanks........
> Arcadius....... :-)
>
> -----Original Message-----
> From: Joe Bachmann [mailto:joe.bachmann@newmail.net]
> Sent: Monday, September 02, 2002 2:47 PM
> To: vectorlist@synthcom.com
> Subject: Re: VECTOR: 19K6100 MONITOR B+ VOLTAGE is LOW.
>
> The Woodcock faq say this about that range:
>
> 15.0-18.0; ZD901 (wrong value)
>
> JB
>
> Stempak Arcadius-ASTEMPA1 wrote:
>
> > Hi,
> > ***
> >
> > New to the List, but an Old Vector Collector, at heart
> > (been doing this for some time now). Anyhow Question
> > I have, is that I have a Wells Gardner 19K6100 Monitor
> > in a STAR WARS Upright which I am in the process or restoring.
> >
> > This Monitor was Pieced Together, I.E. TUBE, HV CAGE, NECK
> > Board and DEFLECTION BOARD were Bought Seperately.
> >
> > Monitor appears to work just fine, as far as Picture Quality,
> > (aside from some Minor Burn In) and a ZANEN CAP KIT was recently
> > installed, along with Q903 as well as some other Non ZANEN parts
> > (Resistors) also replaced in the HV CAGE of this Monitor.
> >
> > However and taking all that into account, I can not Adjust the
> > HV anywhere near the 19.5KV (Ib=0) as stated in the Monitor Manual.
> > In fact my Range is somewhere in the neighboorhood of 14.4KV to
> > 17.2KV(Max)and the B+ Voltage goes from 130 or so to around 167 VDC
> > when Checked at Pin 5 on RED HV CAGE Connector. Also All Wiring
> > and Solder Connections have been Reflowed and Verified, as O.K.
> >
> > Any Ideas ??? Could ZD 902 (HV CAGE) be Bad even though I
> > already replaced this with a New Part ??? Could the 555 Timer Chip
> > have something to do with this ??? Or could it be the BU207 if I
> > recall correctly (BIG Power Transistor) on the HV CAGE Itself ???
> >
> > Thanks........In Advance.........
> > Arcadius........:-)
> >
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Received on Mon Sep 2 15:59:17 2002