Advance Instruments OS250 Oscilloscope
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Advance Instruments OS250
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Model:
OS250
Date:
1974
Class:
Type:
SubType:
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.
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:
2012 12 31
MD5:
25a1a4bca32d7b2877973999d853fcaa
Downloads:
1460
Manual type:
Cirquit Diagram
Pages:
5
Size:
1.28 Mbytes (1341433 Bytes)
Language:
english
Revision:
Manual-ID:
Date:
1974 01 01
Quality:
Scanned document, very well readable.
Upload date:
2017 08 26
MD5:
c04a522e9a75c6fb6e9fd0710eb4ce0d
Uploader:
Alex
Downloads:
493
Information
Info Note: All the schematics with good quality.
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Comments
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!