Jc-120 Schematic -

Provide a for measuring bias voltages on the power board.

If you are new to reading amplifier schematics, follow this specific protocol for the JC-120: jc-120 schematic

[Guitar Input] ──> [Preamp Channel 1 (Clean)] ───────────────┐ ──> [Preamp Channel 2 (FX)] ────> [Chorus] ──┼─> [Dual Power Amps] ──> [Dual Speakers] 1. Dual Preamp Channels (CH-1 and CH-2) Provide a for measuring bias voltages on the power board

To create the chorus effect in an era before digital microprocessors, Roland used analog (typically the MN3002 or MN3007 chips, driven by an MN3101 clock oscillator). jc-120 schematic

Used in early chorus circuits, later replaced by the MN3004.

Tip: Always check the serial number and chassis type of your amplifier before matching it to a schematic. Key Sections of the JC-120 Architecture