UK Vintage Radio Repair and Restoration Powered By Google Custom Search Vintage Radio Service Data

Go Back   UK Vintage Radio Repair and Restoration Discussion Forum > Specific Vintage Equipment > Vintage Computers

Notices

Vintage Computers Any vintage computer systems, calculators, video games etc., but with an emphasis on 1980s and earlier equipment.

Reply
 
Thread Tools
Old 27th Mar 2020, 8:38 am   #1
Tony Jaques
Triode
 
Join Date: Aug 2015
Location: Manchester, UK.
Posts: 27
Default HP Deskjet 690C. (Actually an 895cxi) Transistor info needed.

Hi there,
Firstly I do apologise if this is in the wrong place, or even if it should not be here at all. If so I am sure that someone will berate me, but I could see nowhere else!
I have had the 690c passed on to me - not working of course. It has a PSU problem. On the only PCB (C6409-A-54) There is a surface mount transistor Q3. Unfortunately it has become upset beyond recognition. Service info seems to be unavailable, but someone somewhere must have it. Can that someone tell me what the transistor is please?
Even better - a circuit of this part of the board might save me a lot of tracing.
Thank you for at least considering this.
Tony...
Tony Jaques is offline   Reply With Quote
Old 27th Mar 2020, 9:56 am   #2
peter_scott
Nonode
 
peter_scott's Avatar
 
Join Date: May 2003
Location: Edinburgh, UK.
Posts: 2,304
Default Re: HP Deskjet 690C. Transistor info needed.

Hi Tony,

I would just try to guess at the characteristics. I would assume it's not a high frequency part so you only need to guess at the power ratings and gain.

Peter
peter_scott is offline   Reply With Quote
Old 27th Mar 2020, 11:30 am   #3
mervyn
Tetrode
 
Join Date: Mar 2005
Location: Whitfield, Dover, Kent, UK.
Posts: 85
Default Re: HP Deskjet 690C. Transistor info needed.

From my days servicing HP laser printers , i very much doubt there will be any schematics available down to component level.. not outside HP or official service centres
Even with proper service manuals from HP it was usually a case of work to find area and then board swap or part swap
I think the previous reply would be the way i would go
regards
Merv
__________________
Regards
Merv
M0MIN
mervyn is offline   Reply With Quote
Old 28th Mar 2020, 1:24 pm   #4
Tony Jaques
Triode
 
Join Date: Aug 2015
Location: Manchester, UK.
Posts: 27
Default Re: HP Deskjet 690C. Transistor info needed.

Hello Peter and Merve,
Thank you for taking the trouble to reply.
That is much as expected. That's a good point about the transistor type not being critical. It should not be a problem finding NPN or PNP from a circuit trace, and with a bit more, luck whether Bipolar of FET. I am sure that you will understand that I was just hoping, however optimistically, to shorten the process.
I will check back in a few days. You never know!
Thanks.
Tony...
Tony Jaques is offline   Reply With Quote
Old 28th Mar 2020, 2:04 pm   #5
Nickthedentist
Dekatron
 
Nickthedentist's Avatar
 
Join Date: Jan 2005
Location: Oxford, UK.
Posts: 14,750
Default Re: HP Deskjet 690C. Transistor info needed.

I have a CD-ROM called "APS SERVICE MANUALS FOR HP DESKJET" which I would imagine might cover this model. Looks like a bootleg copy of something designed for HP service departments, bought on eBay in 2002.

However, I think it ran on Windows 98 so I can't check anything at the moment.

You're welcome to borrow it if you want - I can post.

Nick.
Nickthedentist is offline   Reply With Quote
Old 31st Mar 2020, 8:56 am   #6
Tony Jaques
Triode
 
Join Date: Aug 2015
Location: Manchester, UK.
Posts: 27
Default Re: HP Deskjet 690C. Transistor info needed.

Thank you so much for that Nick,
I have sent an e-mail to you.
Tony...
Tony Jaques is offline   Reply With Quote
Old Yesterday, 8:00 am   #7
Tony Jaques
Triode
 
Join Date: Aug 2015
Location: Manchester, UK.
Posts: 27
Default Re: HP Deskjet 690C. (Actually an 895cxi) Transistor info needed.

Note to Moderator:

Hi there,
Like an idiot I entitled the thread Deskjet 690 (which is one I have on loan). It should have read Deskjet 895cxi (which is the faulty one).
I don't think that I can change it, but it might just be helpful if you did.
Not That I seriously think that there is anyone who can tell me what Q3 is in that one either!
But you never know.
Tony...
Tony Jaques is offline   Reply With Quote
Old Yesterday, 11:23 am   #8
M0TGX Terry
Pentode
 
Join Date: Sep 2005
Location: Grantham, Lincolnshire, UK.
Posts: 230
Default Re: HP Deskjet 690C. (Actually an 895cxi) Transistor info needed.

Hi Tony. I have an 895cxi which I never use. It's been out of use but dry stored for several years but was working ok when put away. If you could let me have detailed instructions as to exactly where to look, I'll open it up this afternoon and see if I can find any identifying markings on the bit you're interested in. If we weren't in lockdown, you could have the whole thing for the cost of carriage. I could do with the space!
Let me know if this helps.
__________________
Terry the Morganist
M0TGX Terry is offline   Reply With Quote
Old Yesterday, 1:40 pm   #9
Paul Stenning
Administrator
 
Paul Stenning's Avatar
 
Join Date: Dec 2002
Location: Cardiff
Posts: 7,448
Default Re: HP Deskjet 690C. (Actually an 895cxi) Transistor info needed.

Parcel deliveries are still operating. Just choose a service that collects from home rather than requiring you to take it to a parcel shop (even though it's a bit more expensive). The driver will use appropriate social distancing when they collect.

There are several options on delivery comparison sites like https://www.parcel2go.com.

If you need a box, ask at your local convenience store.
__________________

Paul Stenning
Forum Admin/Owner and BVWS Committee Member
Paul Stenning is offline   Reply With Quote
Reply

Thread Tools



All times are GMT +1. The time now is 5:15 am.


All information and advice on this forum is subject to the WARNING AND DISCLAIMER located at https://www.vintage-radio.net/rules.html.
Failure to heed this warning may result in death or serious injury to yourself and/or others.


Powered by vBulletin®
Copyright ©2000 - 2020, vBulletin Solutions, Inc.
Copyright ©2002 - 2020, Paul Stenning.