SERVICE MANUAL for Hung Chang Oscilloscope OS-615S

[Miguel Angelo Martins Madureira]

Hello,

sorry if it is off-topic for this group,
but I am urgently looking for the service manual for this device.

Any help is wellcome.

Please email me.

Thank you.

 

[Jamie]

Hung Chang has apparently "sunk without trace"! If you do find any archives
please post back, I'm looking for a user manual for the MF200 counter that
was supplied to Maplin by Hung Chang.

That's what you get buying from a fly by night outfit.

If you plan on keeping something for a while, it's always
wise to get service info the time of purchase. or just don't
pay too much so when the device comes to it's death, you won't
feel so bad adding it to your weekly garbage pick up.

 

[Homer J Simpson]

The MF200 was a lucky find at the local tip, especially lucky since the
manager was out at the time and the site employee didn't know these items
(including a function gen & a RF sig gen) were supposed to be reserved for
someone else. Another item in my collection is a HC7030 DMM - my first
DMM, this was rescued from a waste paper basket at a refurb Co I used to
work for, when I got it home the Ohms & AC ranges didn't work, on opening
the case I found the only socketed component was a dual op-amp so I tried
replacing that and "hey presto" that fixed it. The Co even lent me a
multimeter to calibrate it with the presets in the back.

Some old time repairmen can often figure out problems by experience. See if
you can find someone locally.

 

[Homer J Simpson]

I am an old time repairman - and I did fix it locally.

There you go. When I started out I was amazed by the skill at 'guessing' the
older guys had. Now even I can do it - it just took 40 years.