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Old 6th May 2012, 2:17 pm   #1
Trebor1220
Retired Dormant Member
 
Join Date: May 2012
Location: South Yorkshire
Posts: 3
Default Hameg 203-6 oscilloscope

Hi,

I have a problem with channel 2, the calibrator 2V p-p on channel 1 is OK, on channel 2 it reads 1.8V p-p. To check the input modules I Swopped CH1 to CH2 and CH2 to CH1. I got the same readings. So conclude the input modules are OK. Checked IC701 with IC702 there are voltage differences. The Y-Gain pot VR702 is turned full on (that is zero ohms reading across it) I have the schematic for the Hameg 203-6, but there no voltages shown on the diagram. I’ve changed some of the small electrolytic caps, the voltages at the P-Test point are OK. Also swapped the IC701 with IC702, but still the same readings. Does anybody have any clues?

Many thanks.

Rob.
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