Electrical Operation; Circuit; Main Board - Ricoh FT7770 Service Manual

ELECTRICAL OPERATION

1. Circuit

AC power (100 volts) passes through the sorter connector
sorter. The ac power circuit is protected by a 3 ampere
relay.
When the main switch of the copier is on, the first sorter provides +24 volts
to the sorter connector unit and second sorter.
relays of the sorter connector unit and second sorter, closing the ac power
circuit.
The motors of the sorter connector unit and the second sorter are in a
parallel circuit.
switch (second sorter), manual feed safety switch (second sorter), first
cover safety switch (connector unit), and second cover safety switch
(connector unit).
in use (more than 19 bins used), this Close Door indicator of the copier
turns on and the Start Key turns red,

2. Main Board

The second sorter main board differs from the main board of the first sorter
in several ways.
programmable 10 port (IC113 on the first sorter board). The programmable 10
port of the first sorter manages both sorters. Also, the second sorter board
has only one one-to-eight data selector (LS515), and the second sorter does
not have a +5 volt power circuit.
same as the main board of the first sorter.
This circuit is directly opened by the front door safety
If any of these switches opens when the second sorter is
The most obvious is that the second sorter does not have a
This energizes the power
All other components are basically the
10-3
30 April, '89
unit to the second
fuse and a power