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Service Manual required for Iso-Tech ISR635 / GW Instek GOS-635G

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Has anyone got a service manual for the above oscilloscopes please?
It would appear that either model would suffice as they are identical apart from the name badge.
Please email me if you can help:

E-mail address deleted.
They can be a source of unwanted spam when published in open forum.
Better to use a private message (Conversation).
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