Toshiba DP120F, Service Manual

Page: 419 / 706

DP120F/DP125F Circuit Description 7-110 March 2000 © TOSHIBA TEC
Signal Name Type Active Description Destination
CMD2 O - Optional Recording Paper Tray Select Optional
Signal tray MPU
STA1-3 I - Optional Recording Paper Tray Status I/OP-2 GA
1-3 Signals
CMD1 O H Optional Paper Pickup Solenoid Drive Optional
Signal tray MPU
PE I L Optional Paper Empty Detect Signal Optional
tray MPU
PS0-2 I L Optional Paper Size Detect 0-2 Signals Optional
tray MPU
PF O H Optional Pickup Solenoid Drive Signal Q4
MT1A, B, O - Optional Paper Tray Motor Phase Signals Motor driver
AX, BX
PHASE1, 2 O - Optional Paper Tray Motor Current Control Motor driver
1 and 2 Signals
FDA, B, O - Optional Paper Tray Motor Drive A, B, Optional paper
AX, BX AX and BX Phase Signals tray motor
The recording paper placed in the optional recording paper tray is fed by transmitting the power
obtained by driving the optional paper tray motor connected to CN3 to the pickup roller while
controlling the paper feed timing by the optional paper pickup solenoid.
To feed the recording paper, the I/OP-2 GA turn the CMD1 signal to HIGH level and sends it to
the Optional tray MPU. The Optional tray MPU sends the I01, I02, I11 and I12 signals and the
PHASE1 and PHASE2 signals to the motor driver (IC2). The motor driver generates FDA,
FDB, FDAX and FDBX signals based on the signals input and sends them to the optional paper
tray motor for driving. Then the Optional tray MPU turns the PF signal to HIGH level to turn on
Q4. This causes the PF signal to be at GND level to drive the optional paper pickup solenoid
and transmit power to the pickup roller for feeding the recording paper.