STUDIO REPAIR » Roland » αJUNO-2 »  Circuitry     [Image 23 of 39]  :: Jump To  
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Roland Alpha Juno-2  •  Circuitry
Capacitor Array of the 4051-based S&H Circuitry. Roland's 7302 S&H-ASIC Contains Integrated Capacitors.
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

Roland Alpha Juno-2 - A/D Converter * NEC μPD7001 8-bit A/D Converter with Serial I/O

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Roland Alpha Juno-2 - Circuitry - Image by Nikolaus Riehm
Roland Alpha Juno-2 - IR3R05 * Typical Point of Failure: The Integrated VCF/VCA (Roland's IR3R05)

Roland Alpha Juno-2 - Trimmer * VCF Frequency Adjustment Trim-Pots

Roland Alpha Juno-2 - Battery * Desoldered Backup Battery

Roland Alpha Juno-2 - Battery * Replaced Backup Battery with Socket

Roland Alpha Juno-2 - Chorus Board * …

Roland Alpha Juno-2 - Aftertouch * Pressure Strip Connector

Roland Alpha Juno-2 - Slider * Volume Board Assembly 76160400



 
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