[Test-Equipment] Re: [Test-Equipment]141T help needed

[marv_e_ads@juno.com]

Hi John,
   I have a printed manual that covers your SN and I also have the LOGSA
download.   The pulse circuit boards appear to be the same.

   There was a different board used way back in the 11xx prefix's.

   Can you see a part number on the board?   It may be on the back.

    It looks like the only difference in the Conventional mode circuitry
is that R81 (56K) was used in place of a diode, CR15.   

    Incidentally, section 4-58 of the manual does not appear to have been
updated from this earlier configuration.  I also think that the voltage
given for the storage mesh 29 volts, should in actuality be -29 volts. 
The later versions, with R81, probably run in the vicinity of -48 volts.

Good morning,
   Marv  WC6W  310 649 3111


On Sat, 1 May 2004 07:27:39 -0400 "John Barnes" <jbarnes@aztec-net.com>
writes:
> Hi Group !!,
> 
> I have a HP141T. The problem is that the mainframe will not go into 
> the
> conventional (non-storage) mode. I have downloaded the manual from 
> LOGSA and
> from BAMA (both are the same).
> 
> I think the problem is with the bias voltage on the storage grid in 
> the
> CONVentional mode.
> 
>  Unfortunately, the Pulse circuit schematic does not match my unit.
> 
> I am looking for the schematic of the Pulse Board and the component
> locations for a unit with serial number 1615.xxxx.
> 
> Can anybody help ?
> 
> 
> Thank you advance,
> 
> 
> John Barnes
> 
> 
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> 

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