Sequential prophet 5 - Rear Panel Connections

1-6 PCB 6 POWER SUPPLY BOARD REMOVAL
PCB 6 is held to the bottom panel assembly by two capacitor clips and by five regulator mounting
screws. So, removal for component replacement requires unmounting all regulators from the back
panel. Figure 1-5 details regulator installation. Note that the regulators are electrically insulated
from the back panel.
After repair, you can check power supply output before installing on back panel.
CAUTION
DO NOT OPERATE THE UNLOADED POWER SUPPLY FOR LONG PERIODS WITHOUT HEAT¬
SINKING THE REGULATORS. NEVER OPERATE THE SUPPLY UNDER LOAD WITHOUT HEAT-SINKING.
When replacing PCB 6 check regulator insulation from back panel with an ohmeter before apply¬
ing power.
4-40 X 3/8
FL HD SCREW
innoo
BACK
PANEL
MICA INSULATOR
REGULATOR
TAB -4-40
HEX NUT
HEAT SINK
COMPOUND
BOTH SIDES
NYLON SHOULDER WASHER
REGULATOR
Figure 1-5
Regulator Installation
1-7