The values you measured on TP8 and U3-U4 are correct so you should be able to adjust the LEDs. One possible cause of the problem could be an incorrect value for one of the resistors R29 to R33. Please double-check their values.
« Last post by skrzyp on November 02, 2026, 06:12:50 PM »
To be safe, just checking on this before soldering. Is the orientation pictured correct? My part is different than the one pictured in the build guide. Thanks in advance.
« Last post by doktar on October 27, 2026, 08:05:58 PM »
Replaced the blown LED's.
Repeated testing, the GR LEDS are still over what they should be, and can't adjust lower because all the trimmers are all ready at the lowest position.
« Last post by JPK on October 26, 2026, 05:24:59 PM »
Check if the center pin of P2 (makeup) goes from 0 to +12VDC when moving. Next check that this voltage reaches R90 and U22 pin7 (with less amplitude 0-2V4).
« Last post by doktar on October 23, 2026, 06:34:07 PM »
I believe I've blown out the LED's, when testing on the IC's I accidentally shorted pins with the meter probe, I've ordered some replacements and will report back.
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