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Roland Juno 106S

Programmable Polyphonic Synthesizer (1984)

Roland juno106

"Rare version of iconic Roland Juno106, quite the same but it adds two speakers built-in and a sheet music stand bracket"


KEYBOARD 61 keys, main panel features a basic segment display, 20 levers, 2 knobs, 3 switches and 34 buttons, 2 internal speakers, on the left side there is a joystick for pitchbending or modulation assignable to filter cutoff.  Beside the "classic" 106, the juno 106S has been released in a rare module version the MKS7,  a consumer home edition HS-60 synthplus and later a digital module in limited edition Ju-06 boutique; not to mention A LOT of VST plugins and sample pack.

1- master pitch tuner trimmer
2- TAPE I/O for saving loading patches
3- pedaswitch input for program UP
4- Sustain pedal input
5- headphones out
6- Main out (stereo for chorus effect)
7- signal out impedance switch High, Med and Low

Roland juno106S


SOUND main core CPU NEC D7811G manages 6 voices polyphony, each voice is composed by 1 DCO digitally oscillator controlled based on 3 IC X MC5534A WG waveform generators. Each DCO features 4 summable waveforms: square with variable width, triangle, square sub-oscillator (set to 1 octave lower) and white noise generator.

The DCO can be sequenced in 3 playmodes: 

- poly1 voice is assigned restarting from first free available
- poly2 voice rotate always from 1 to 6
- unison stacks up the 6 voices, sadly it misses a DETUNE option
TIP: press [poly1] + [poly2] to access to access special unison. 

FILTER: Classic analog filter based on IC Roland IR3109 with 2 modes: Lowpass resonant (self-oscillating) at 4 poles + Highpass (not resonant) . 
LFO: Single delayed triangle modulator, relative frequency range from 0.1 to 30 Hz and 3 destinations: DCO pitch, VCF cutoff and DCO pulse width
ENVELOPE: 1 ADSR (4-segments) EG for both VCA amplitude and VCF cutoff filter (Note: bass generator DCO "7" has its own EG.).  The EG structure (and the VCA) are based on dreaded IC 80017A with frequent failures (read more)
Roland juno106S

Effect, memory and Midi

EFFECT chorus is based on BBD chips (2 X MN3101 + 2 X MN3009) and 2 presets.

MEMORY  MEMORY 128 patch RAM, sounds patches can be saved / load either by Midi exclusive dump or tape player. 
Battery replacement: a BR-2325 lithium battery soldered to the mainboard / J-106S TEST MODE : turn on the synth with the KEY-TRANSPOSE pressed- testmode is useful to discover a faulty voice.

MIDI the J-106S offers one of the most impressive Midi implementation for the time: in fact all sliders sends and receive Midi exclusives systems! a big advantage to the father Juno60 however the 106S lost the precious arpeggiator.

Roland Juno106S

Roland Juno 106S specifications

Brand: Roland
Name: JUNO-106 6 Voice Programmable Polyphonic Synthesizer
Year: 1984-1985
Type: 61 keys keyboard
Class: analog polysynth
Original Retail Price: $1195.
Actual Price: 1000€
Display: numeric segment

LFO Modulation Knob
Pulse Width Modulation Knob
PWM Mode Switch (LFO / MANUAL)
Pulse Wave (ON/OFF) & Indicator (Waveform)
Sawtooth (ON/OFF) & Indicator (Waveforms)
Range Selector Buttons (16″, 8’, 4’)
Sub Oscillator Level Knob
Noise Level Knob
Cutoff Frequency Knob (0/1/2/3)
Cutoff Frequency Knob
Resonance Knob (0~Self Oscillation)
ENV Modulation Knob
Polarity Switch ( normal / inverse)
LFO Modulation Knob
Key Follow Knob (0~100%)
Control Signal Selector Switch (ENV/GATE)
VCA Level Knob
Attack Time Knob (1.5ms~3s)
Decay Time Knob (1.5ms~12s)
Sustain Level Knob (0~100%)
Release Time Knob (1.5ms~12s)
Rate Knob (0.1Hz~30Hz)
Delay Time Knob (0~3s)
Volume Knob
Portamento Time Knob
Portamento Switch (ON/OFF)
LFO Trigger Sens Knob
Bend Sens (DCO) Knob
Bend Sens (VCF) Knob
Bender Lever
ASSIGN MODE  Poly 1 Switch  + Poly 2 Switch 
KEY TRANSPOSE : Key Transpose Button & Indicator 

Output Jacks (MONO, Stereo)
Phones Jack (Stereo)
Pedal Hold Jack (DP-2) + Patch Shift Jack (DP-2) 
Save Jack / Load Jack  with Memory Protect Switch 
MIDI Function Selector Switch
Tune Adjust Knob (+50 cent)
Headphones: RH-10
Foot Volume: FV-200
Pedal Switch: DP-2
Carrying Case: AB-1
Stand: KS-2

MEMORY : 64 patches
EFFECT: analog chorus based on BBD

DIMENSIONS : 992(W) x 320(D) x 120(H) mm / 39-1/16(W) x 12-5/8(D) x 4-11/16(H) inches
WEIGHT : 10 kg / 22 lb 

video demo

Do you use this machine ? do you like it?  Let us know in the comment field just below 


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Roland JUNo106S Roland JUNo106S
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