new build problems
Posted: Oct 7th, '20, 12:49
Hi all,
Just finished putting together my 1st nava build and having some issues, any pointers would be much appreciated...
PSU board all ok +15/5v ok and -15 ok.
once connected to the main pcb and measured connected, the +/- 15 sits at
1. the noise circuit:
IC 27 getting +/-1.5v on pins 4&8
IC32/33 getting 1v on pins instead of 15v
noise noise output
have checked for dry joints, component values and diodes
2. master: 0.8v on tp1no variation to allow 5v
sequencer runs and allows epson init.etc
plus display dim
no sound out for any voice
any suggestion?
thanks
Just finished putting together my 1st nava build and having some issues, any pointers would be much appreciated...
PSU board all ok +15/5v ok and -15 ok.
once connected to the main pcb and measured connected, the +/- 15 sits at
1. the noise circuit:
IC 27 getting +/-1.5v on pins 4&8
IC32/33 getting 1v on pins instead of 15v
noise noise output
have checked for dry joints, component values and diodes
2. master: 0.8v on tp1no variation to allow 5v
sequencer runs and allows epson init.etc
plus display dim
no sound out for any voice
any suggestion?
thanks