M473B · RTO-144 Connections

M473B - Stereo Submaster

Rear connector

P2 — REAR VIEW · CARD EDGE · 44 CONTACTS123456789101112131415161718JMP.20.1819VEE-AUDIO -25V20GND21VCC-AUDIO +25V22CHASSISABCDEFHJKLMNPRSTUVWXYJMP.Y.21ZJMP.Z.YTOP ROW 1-22: COMPONENT SIDE · BOTTOM ROW A-Z: SOLDER SIDEPowerGround / chassisJumper

Inputs and outputs

M473BM473B - Stereo SubmasterINPUTSOUTPUTSVEE-AUDIO-25 V P2-19 / GND P2-20VCC-AUDIO25 V P2-21 / GND P2-20CHASSISP2-22⌒ JMP.Y.21 P2-Y↔P2-21⌒ JMP.20.18 P2-20↔P2-18⌒ JMP.22.21 P2-22↔P2-21⌒ JMP.Z.Y P2-Z↔P2-Y

Power · bench PSU

RailStyleVoltsMax ASupplyGroundLink
VEE-AUDIONEW-250.1P2-19P2-202
VCC-AUDIONEW250.2P2-21P2-201

Jumpers

FunctionDesignationFromTo
24V JumperJMP.Y.21P2-YP2-21
CH ON GND JMP.20.18P2-20P2-18
Insert +JMP.22.21P2-22P2-21
Insert -JMP.Z.YP2-ZP2-Y

Source: Ward-Beck Systems - Module RTO-144 Jumper calculator.xlsx (Database tab). Pin direction is inferred from the signal name. Verify against the module schematic before wiring.

WBS Ward-Beck Systems Ltd.
Title
M473B RTO-144 connections
Drn.
make_rto144.py
Date
Oct 17 2026