Optional Tray Pba - Toshiba e-STUDIO170F Service Manual

7.9

OPTIONAL TRAY PBA

This section describes the function of each circuit on the Optional tray PBA.
Main PBA
2ND_PAPER_EMP
82
SIZE20
63
IC37
SIZE21
64
Engine-CPU
SIZE22
65
2ND_PICK_UP_SLX
80
The Optional tray PBA is contained in the optional recording paper tray optionally installed in this
machine. It detects the presence and absence of recording paper in the recording paper tray and relays
the recording paper tray detects sensor output signals and paper pickup solenoid drive signal.
The presence or absence of recording paper in the optional recording paper tray is detected by the
optional paper end sensor. The optional paper end sensor turns on when the actuator of the optional
paper end sensor is pushed down by the recording paper. This allows the 2ND_PAPER_EMPX signal
to go LOW and input to the Engine-CPU (IC37) on the Main PBA to detect that recording paper is
placed in the recording paper tray.
The presence or absence of recording paper tray is detected by the optional tray sensor connected to
CN23. The sensor is pushed down by the projection on the side of the recording paper tray to turn on.
This causes the SIZE20-2 signals to go LOW and input to the Engine-CPU to detect the recording
paper tray placed.
The recording paper placed in the optional recording paper tray is fed by driving the optional paper
pickup solenoid. The Engine-CPU causes the 2ND_PICK_UP_SLX signal to go LOW. This allows the
optional paper pickup solenoid to be driven to transmit power to the pickup roller for feeding the record-
ing paper.
Signal Name Type
2ND_PAPER_EMPX I
SIZE20-2 I
2ND_PICK_UP_SLX O
January 2005 © TOSHIBA TEC
Optional tray PBA
+5V1 +5V1
3 9
R233
5 7
4 8
6 6
7 5
8 4
+24V3
1 12
2 15 2 11
IC59
8
PG
Fig.7-58
Active Description
L Optional paper detect signal
L Optional recording paper tray detect sig-
nals 0-2
L Optional paper pickup solenoid drive sig-
nal
7 - 77
R1
Optional
paper end
sensor
3
4
2
1
1
2
Destination
Optional paper
end sensor
Optional tray sen-
sor
IC59
e-STUDIO170F Circuit Description
Optional
tray
sensor
Optional
paper pickup
solenoid
7