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Hantarex MTC 9000 image squashed vertically
be77amyX:
So newest update.. Got a new IC1 fitted, new c12, c13, tested all the resistors and diodes in the pic below and all the caps are the correct values! Still no luck! I did notice that B+ which the manual says should be reading 130v is only 107v with the power on and everything connected. is this correct or should I be concerned about this? I also replaced c53 as it looked like it hadn't been done
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grantspain:
right, the b+ should be between 128-132
there is a resistor that will cause your issue R110 33k 1watt and i tend to use metal oxide
desolder the resistor and meter
be77amyX:
Desoldered and tested. reads 32.75kOhm. looks like the original part, worth replacing anyway?
grantspain:
no thats fine, you need to id the low b+ though as it will cause issues like yours
be77amyX:
So I guess my next step is to check every component in this area? and check the 128vAC incoming voltage?
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