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TM2 does not adjust the 5v point (PT1)
Posted: Oct 4th, '16, 05:49
by jens van daele
Hey!
I've got 10v between PT1 en Gnd measure points.
Adjusting TM2 in calibration process does nothing.
Anyone any clue?
Thanks in advance!
Re: TM2 does not adjust the 5v point (PT1)
Posted: Oct 4th, '16, 06:48
by another_universe
Check carefully all ics in the sequencer area !
Re: TM2 does not adjust the 5v point (PT1)
Posted: Oct 4th, '16, 07:43
by jens van daele
another_universe wrote:Check carefully all ics in the sequencer area !
I did this now, there was one reversed.. I've put him normal position.
But the 10v stays the same.
Thanks in advance!!
Re: TM2 does not adjust the 5v point (PT1)
Posted: Oct 4th, '16, 07:54
by KlangGenerator
If you reversed the IC and powered up the Nava it might be defective now...
Re: TM2 does not adjust the 5v point (PT1)
Posted: Oct 10th, '16, 05:24
by jens van daele
Replaced the defective IC's in sequencer..
Now i get 11,41v dc btween gnd and tp1..
No contrast on lcd anymore (had working lcd last time)
I REALLY DON'T KNOW WHAT TO DO :/
Does somebody repairservice against payement?
i don't think i could solve this problem without
Getting fried components.
Thanks in advance people!!
Re: TM2 does not adjust the 5v point (PT1)
Posted: Jan 1st, '17, 07:58
by lukep_gdansk
Check both trimmers and resistors for correct value. After that check voltage on pins from TL (datasheet for that) and check caps near TM2 and TL074 (white ones).
good luck
Re: TM2 does not adjust the 5v point (PT1)
Posted: Jan 11th, '17, 12:53
by Alex808
Hi, you have to turn the screw clockwise long time to achieve the 5V. You can turn it until it clicks quietly. But it works.