STUDIO REPAIR - Roland Alpha Juno-2 - Main Board

Picture Content Information
▪ Device:		Roland Alpha Juno-2
▪ Topic:		Main Board
▪ Abstract:		JU-2 Assembly 7616110 / HS-80 Assembly 76168120
▪ Owner:		Equipment courtesy of Anthony Rother
▪ Creator:		Image by Nikolaus Riehm
▪ Website:		studiorepair.com
▪ Editor:		Nikolaus Riehm

STUDIO REPAIR » Roland » αJUNO-2 » Main Board

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Roland Alpha Juno-2 • Main Board

JU-2 Assembly 7616110 / HS-80 Assembly 76168120

Roland Alpha Juno-2 - Opened * …

Roland Alpha Juno-2 - Opened * …

Roland Alpha Juno-2 - Keyboard * Partly Dismantled Keyboard Assembly

Roland Alpha Juno-2 - Keyboard * Keyboard Assembly Dismantled for Contact Cleaning

Roland Alpha Juno-2 - Main Board * JU-2 Assembly 7616110 / HS-80 Assembly 76168120

Roland Alpha Juno-2 - Main Board * JU-2 Main Board Assembly 7616110 (Revision w/o the HS-80 Assembly No 76168120 Imprint)

Roland Alpha Juno-2 - Main Board * Main PCB Soldering Side

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Roland Alpha Juno-2 - Main Board - Image by - Equipment courtesy of

Roland Alpha Juno-2 - Circuitry * Roland ASICs: DCO (Type RD87123), S&H (Type 7302) and VCF/VCA (Type IR3R05)

Roland Alpha Juno-2 - Circuitry * Intel 8032 8-bit MCU, RAM, ROM, Gate Arrays, ADC (NEC μPD7001 8-bit Serial-I/O ADC)

Roland Alpha Juno-2 - Circuitry * Intel 8032 8-bit MCU, RAM, ROM, Gate Array (this board revision doesn't contain a HS-80 imprint)

Roland Alpha Juno-2 - Logotype * Main Board Logotype

Roland Alpha Juno-2 - DCO * Roland 87123 Integrated DCO Circuitry

Roland Alpha Juno-2 - Circuitry * Voice's VCF/VCA Circuitry

Roland Alpha Juno-2 - D/A Converter * The Large Resistor Array RA2 in Conjunction with a NEC μPC4082 (IC9) JFET-Input Operational Amplifier forms the D/A Converter for all the Control Voltages

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