Juno-60 and Juno-106 service notes

 

JUNO-60 test-mode

Fire the Juno up with the KEY-TRANSPOSE button pressed. Now you're in testmode.
Testmode let you have three different keyassign modes. You select assign mode
with the arpeggio mode-switch.
If the arpeggio mode-switch is:

UP - mono mode. All 6 voices are assigned to the lastest key pressed. Very fat!

UP/DOWN - rotary mode. First key pressed will use for instance voice 1, they
next key will use voice 2 and so on. If you now keep 4 keys pressed and
releases three of them next key will be assigned to voice 5. Voices are always
assigned in number order but the first key doesn't always assign voice 1. If
you keep one key down, that voice will not be assigned until you release this
key.

DOWN - non-rotary mode. First key pressed will use for instance voice 1, they
next key will use voice 2 and so on. If you now keep 4 keys pressed and
releases three of them next key will be assigned to voice 1. Voices are always
assigned to the voice available with the smallest number.

In to the service manual the voices are assigned in "cyclic manner" and
the 7th key pressed steals the 1th voice. Then the manual says there are "three more"
key assign modes using the test mode described above.

In testmode HOLD button will work as normal. Arpeggio will also work.

Roland Custom IC`s in the Juno-60

Oscillator: Std. IC's

VCF : IR3109

VCA: BA662

Envelope: IR3R01

BBD (chorus): MN3009/MN3101

Battery: 3V Lithium CR1/3N

test-programs 80 to 98

For the programs 80 to 98 put a cord into the PATCH SHIFT connector.
The cord should be non-connected on the other side. Now you can access the
testprograms 80-98 in the normal fashion. Keep 5 down and press 3 for bank 8.
Try program 85 in monomode and you're getting a nice clavinet type sound.
Program 98 is called 0FFH according to the service manual.
These programs are for testing the synth.

load the original factory sounds

Load the modulated wav-tone into the synth's "LOAD" input to load up the Factory presets. Be sure to start the .wav file (the lead tone) and press the LOAD button when the lead tone is running, right before the modulated (sounds like a modem) tone is heard. The display will show "Er" for error because it's too loud. You will find the right volume and the Juno will load the presets, showing "--" on the display at the end. That's the sign that the loading was successful.

JUNO-106 test-mode

Fire the Juno up with the KEY-TRANSPOSE button pressed. Now you're in testmode.
Testmode let you have three different keyassign modes. You select assign mode
with the Poly 1&2 mode-switch.

Poly1 - Unison. All 6 voices are assigned simultaneously .

Poly2 - non rotary mode. The voices are assigned to the keys played in the order of CH1 to CH6 as long as the previous keys are held down. One-key staccato always sounds CH1 only.
The display window indicates current channel number.

Poly1+Poly2 - rotary mode. The voices are assigned in a cyclic manner;
7th key steals the voice from the 1st key.
The display window indicates current channel number.

Roland Custom IC`s in the Juno-106

Oscillator: MC5534A

VCF : A1QH800170

VCA: uPC1252H2 BA662

Envelope: Software generated

BBD (chorus): MN3009/MN3101

load the original factory sounds

Load the modulated wav-tone into the synth's "LOAD" input to load up the Factory presets. Be sure to start the .wav file (the lead tone) and press the LOAD button when the lead tone is running, right before the modulated (sounds like a modem) tone is heard. The display will show "Er" for error because it's too loud. You will find the right volume and the Juno will load the presets, showing "--" on the display at the end. That's the sign that the loading was successful.