.....obsolete user manuals, a lot of repair manuals, free service manuals, rare schematic diagrams, usefull service instructions, pdf books, how to repair instructions, lost operating manuals, old handbooks, tons of part lists, hidden service bulletins, your instruction books, informative repair tips, complete disassembly routines.....


What are you looking for?

extended search


Advance Instruments OS250 Oscilloscope
Manufacturer:
Model:
OS250
Date:
1974
Class:
Type:
SubType:
10MHz dual trace oscilloscope

Information

The Advance OS250 Oscilloscope is a 10 MHz dual trace instrument with a 10cm x 8cm display. It is designed for use in general purpose laboratory work, educational uses, TV and servicing applications. It features two identical input channels with a maximum sensitivity of 5mV/cm and a bandwidth of DC to 10MHz. The two channels may be viewed separately, alternately at fast timebase speeds, or chopped at a 250kHz rate at low timebase speeds. Particular attention has been paid to trigger performance, and the system used includes a variable control with bright line operation in the absence of a signal, or when the trigger level is outside the range of the input signal.

show more

Service and User Manual
Manual type:
Service and User Manual
Pages:
37
Size:
5.43 Mbytes (5693414 Bytes)
Language:
english
Revision:
Manual-ID:
Date:
unknown
Quality:
Scanned document, all readable.
Upload date:
31 December 2012
MD5:
25a1a4bca32d7b2877973999d853fcaa
Downloads:
1141
Cirquit Diagram
Manual type:
Cirquit Diagram
Pages:
5
Size:
1.28 Mbytes (1341433 Bytes)
Language:
english
Revision:
Manual-ID:
Date:
01 January 1974
Quality:
Scanned document, very well readable.
Upload date:
26 August 2017
MD5:
c04a522e9a75c6fb6e9fd0710eb4ce0d
Uploader:
Alex
Downloads:
296

Information

Info Note: All the schematics with good quality.

show more

Comments

Gravatar
New
says...
Many thanks for the uploader, site creator and maintenance team! :)

My oscilloscope

This is my only oscilloscope, and im depending on him to do my school project. He always have been a got buddy, but now need some service.. and this manual are a great help!
So far im i see that the Diode bridge (MR301) are not rectifying well.. he are producing a AC current on output, and the DC tension is about 30V (instead 155V, even if i adjust R320). But after i replace a Diode Bridge by a new "2W08", after a couples os seconds i have a drop of tension across C315 (155V to 60V).. i need to troubleshoot a little more, but maybe is the C315, TR301 or TR302 that are not healthy.. we will see :)

have a good day everyone! and thanks again!

Add Comment

* Required information
Captcha Image
Powered by Commentics