juno106-
2. DCO CV OFFSET
(MODULE 8OARD)
Test instrument: Voltmeter (1mV resolution)
| Test point: Key assignment: |
TP3 POLY 1 (UNISON during test mode). |
2-1. Press MIDI CH button; D/A converter turns its output to OV.
CAUTION
Pressing any key on the keyboard releases MIDI CH, letting the D/A to develop voltage according to that key. Press MIDI CH again to defeat the key voltage.
2-2. Adjust VR33 for OV reading.
2-3. Leave MIDI CH ON for the next adjustment 3.
3. VGA BIAS
(MODULE BOARD)
| Test instrument: Test point: Key assignment: |
Voltmeter (1mV resolution) TP7 POLY 1 (UNISON during test mode). |
3-1. Press MIDI CH. Refer to "CAUTION in 2-1". 3-2. Adjust VR34 for a reading within +0.25V to
+0.27 V.
4. VGA OFFSET
(MODULE BOARD)
| Test instrument: Test point. BANK: Key assignment: |
Oscilloscope TP8 (CH1) to TP13 (CH6) 1 POLY 1 (UNISON during test mode) |
4-1. Adjust the following trimmers, respectively, for the minimum thumps.
| CH | VR NO. 30 CN NO 1 |
25 20 15 10 5 2 3 4 5 6 |