10-8 Phaser 8400/8500/8550/8560 Color Printer Service Manual
Inside Front Wiring Diagram
The arrows indicate which connectors you should look at for the PEST codes.
The PEST codes are displayed on the Control Panel.
s8500-129
37036.4x Process Motor
37008.4x Preheat Power
(AC Connector)
J860 13131.41 Sensor Flag
Paper Jam
(Open Front Cover)
Load Paper