STUDIO REPAIR - Roland JD-990 - Jack Board

Picture Content Information
▪ Device:		Roland JD-990
▪ Topic:		Jack Board
▪ Abstract:		Analog Circuit Board - Component Side
▪ Creator:		Image by Nikolaus Riehm
▪ Website:		studiorepair.com
▪ Editor:		Nikolaus Riehm

STUDIO REPAIR » Roland » JD-990 » Jack Board

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Roland JD-990 • Jack Board

Analog Circuit Board - Component Side

Roland JD-990 - Display * Test Menu - OS Version 1.00

Roland JD-990 - Display * Test Menu - OS Version 1.05

Roland JD-990 - Display * Maintenance & Repair - OS Update from Version 1.00 to 1.05

Roland JD-990 - Display * Test Mode - LCD Test

Roland JD-990 - Opened * …

Roland JD-990 - Main Board * …

Roland JD-990 - Opened * …

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Roland JD-990 - Jack Board - Image by

Roland JD-990 - Jack Board * Analog Circuit Board - Soldering Side

Roland JD-990 - Power Supply * …

Roland JD-990 - Power Supply * Voltage Regulators & Rectifier

Roland JD-990 - Power Supply * …

Roland JD-990 - Circuit Board * Hitachi H8/570 Mask-ROM Microcontroller

Roland JD-990 - Circuit Board * OS ROM - Hitachi HN27C4096 262144-Word×16-Bit EPROM (4MBit/512kByte)

Roland JD-990 - Circuit Board * Roland MB87731A ASIC (EP Chip)

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