Maker Pro
Maker Pro

Hameg HM8122 frequency/counter

martijn_klasing

May 19, 2022
1
Joined
May 19, 2022
Messages
1
Is there anybody has has experience in repairing a Hameg HM8122 frequency/counter? The left two digits on the display are not working. These give the sign and the exponent of a measured value. Beside this malfunction the apparatus is working correctly and in spec.
 

kellys_eye

Jun 25, 2010
5,131
Joined
Jun 25, 2010
Messages
5,131
First, determine whether the display is multiplexed or not. If it's multiplexed and the rest of the display is working then you likely have a dud display. If they are driven independently you will need to chase the decoding (usually hex-to-7seg decoders).

In this case I suspect a simple dry joint but without details (pics and schematics) this is guesswork.
 
Top