Thanks Samogon,
I've often wanted a photo list like that.
Thanks Samogon, that's not a bad list there are quite a few logos I haven't seen before. I think there are still a lot of missing logos from from far eastern and also eastern european manufacturers, they're always tricky to track down.
Thanks Jay, that's much better. Now all I need is the optical recognition software
Mentioned in another thread is TiN's collection of manuals. Added here so not missed when I get around to collating all links.
I can share my collection of T&M manuals and docs in return. (160GB).
Not to hijack thread, but I accept contributions too .
More mirrors - better!
Not sure if this is the right place to post to but....
Looking for the schematic/circuit for a Vision Engineering Alpha Microscope PSU main PCB.
I salvaged a much used and abandoned microscope for home use.
Initially the lamps were flickering at about 2Hz which I cured by replacing the main Electrolytic, but now at power up, the circuit takes several attempts to ramp up to full light level.
I have gathered up data sheets for the ICs and I am hoping that someone has a schematic/circuit diagram before I have to trace out the board.
I believe the problem area is the Triac (MAC223A-8-ON) driven by a Zilog (Z86E0412PSC) that produces the lamp level PWM?, so anyone with experience of this type of circuit I would appreciate hearing from you.
I have yet to start probing the board with my scope, but this will be my first use of it, so I am doing a lot of reading up before I start poking into a live board.
Thanks in anticipation.
Not sure if this is the right place to post to but....
Welcome to the forum.
It's not really but as a newbie we'll forgive you.
You should start a new topic in this main Repair board and you'll get better visibility and more views.
Use the brand and model in the thread title and start the post by asking for manuals and/or schematics.
You might have to draw out the circuit and/or take some pics so others can help you fix it but those might be down the track a bit yet.
Good luck with it, seems a very worthwhile repair.
Edit
Smelter strated a new thread:
https://www.eevblog.com/forum/repair/vision-engineering-alpha-microscope-psu/msg1208255/?topicseen#msg1208255
Not sure if this is the right place to post to but....
Looking for the schematic/circuit for a Vision Engineering Alpha Microscope PSU main PCB.
I salvaged a much used and abandoned microscope for home use.
Initially the lamps were flickering at about 2Hz which I cured by replacing the main Electrolytic, but now at power up, the circuit takes several attempts to ramp up to full light level.
There probably are some more dead capacitors on the board, likely around 47-220uF, and replacing those should cure the problem.
For those new to scopes and CRO's the first few minutes if this old vid from Tek is useful to understanding the functions of moving an electron beam to create a waveform on a CRO display.
This simple explanation also helps one understand what might be involved on repair of CRO's.
https://youtu.be/jHGAnJjnNY0https://youtu.be/G0Dci5RPe94
You can visit the below-given link to know or get knowledge about PCB/BGA repair. BEST also provide training and certification if you want to go in the professionalism of soldering.
http://www.solder.net/
You can visit the below-given link to know or get knowledge about PCB/BGA repair. BEST also provide training and certification if you want to go in the professionalism of soldering.
http://www.solder.net/
To avoid wasting peoples time please update your post to provide the actual links to the "knowledge" material your talking about.
http://www.jordansmanuals.com covers domestic household products and caters for a few different brands. Provided by statewide appliance spares, suppliers of tv boards and misc other parts who charge a premium price. Their service is good but it's often much cheaper elsewhere.
Does anyone have any documents regarding the TI-83+ Calculator or the chips used inside of it?
Hi!
I was looking for the components list for the Soviet Made C1-55 Oscilloscope I've just got as a repair project, it proved impossible to locate any until I put the Cyrillic word for Oscilloscope into a Google Image Search!
If your looking for Russian Test Equipment Documentation, (beware - it'll be nearly all in Cyrillic!!!) try this site:-
http://www.kiprip.ru/help.htmlI finally found the parts list I wanted on this site!
Chris Williams
I've been looking for the service manuals for the BK Precision 1590a. I can find the schematic/parts manual and the owner's manual, but the service manual is very hard to find. (I do know that it exists though!)
I have gone through every website listed here and more. Any help is appreciated!