The draft of the First Watt service manual is posted at
www.passlabs.com/np/F1_SRV_MAN.doc
and you have an opportunity to see it and offer corrections
or comments before it goes up officially at FW.
It's a 5.4 M doc file, so some of you dial-up guys might want to
set the time aside for it.

/pass/: just got his wine shipment from David Berkeley, and
has to go now.
www.passlabs.com/np/F1_SRV_MAN.doc
and you have an opportunity to see it and offer corrections
or comments before it goes up officially at FW.
It's a 5.4 M doc file, so some of you dial-up guys might want to
set the time aside for it.
/pass/: just got his wine shipment from David Berkeley, and
has to go now.
convert this to PDF? I don't have and I don't want Word.
F1_SRV_MAN.pdf, PDF, 2 Megs, unauthorized
Please right/long-click and Save-As to your machine; it is less load on my poor server than you all reading on-line.
Mr Pass, if you object, or issue a new version, ask the moderator to edit-out this message, and drop me an email.
F1_SRV_MAN.pdf, PDF, 2 Megs, unauthorized
Please right/long-click and Save-As to your machine; it is less load on my poor server than you all reading on-line.
Mr Pass, if you object, or issue a new version, ask the moderator to edit-out this message, and drop me an email.
PRR said:
... have you checked www.openoffice.org works pretty good in most cases and is free and also nice looking.
peranders said:
I don't really want it, too much bloat...
thank you, PRR.
you also see that the PDF file is less than half the size!
m.
lumanauw said:Do you insert each component and solder with your own hands?
You do not half realise how funny you are, Lumanauw.
To quote Python:
That's not a service manual, it's a 'build it yourself' instruction.
Greatly appreciated, Mr P.
jacco vermeulen said:To quote Python:
That's not a service manual, it's a 'build it yourself' instruction.
Greatly appreciated, Mr P.
Couldn't of said it better myself.
Thanks for sharing, NP! A couple of other minor notes:
On p.7, the statement that the drain of Q1 operates at about 3V should instead refer to Q7, I think.
Also, in the amplifier schematic, I believe that R20 should go to the + supply rail, not to the right output terminal as shown.
Several nice touches here, if I may be so bold. I especially like the dual use of thermistors as inrush current limiters and line voltage jumpers.
On p.7, the statement that the drain of Q1 operates at about 3V should instead refer to Q7, I think.
Also, in the amplifier schematic, I believe that R20 should go to the + supply rail, not to the right output terminal as shown.
Several nice touches here, if I may be so bold. I especially like the dual use of thermistors as inrush current limiters and line voltage jumpers.
lumanauw said:There are 2 zeners for protection at input. Somewhere I read that zeners that biased with low current can make noise. Does it make noise here?
The zeners are not in conduction, so they don't make noise.
BTW, thanks everybody, especially Grey for the corrections.
Desmond is posting a pdf file, but it's still huge - I couldn't get
pdfwriter to make it small and still retain the detail on the
board layouts.
- Status
- This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button.
- Home
- Amplifiers
- Pass Labs
- F1 Service Manual