Abnormal Operations Of Printer After The Power Is Turned On; Any Operation Does Not Start At All; Abnormal Sound Is Heard - Toshiba e-STUDIO477S Service Manual

6.5.4. (2) Abnormal operations of printer after the power is turned on

(2-1) Any operation does not start at all.

Check item
(2-1-1) Check the peripherals of the power supplies
Primary AC power Check the supplied voltage of the AC power
source that is source.
connected to the
printer.
5V power and 24V Check the power supply voltages at the POWER
connector ⑦ of the CU/PU board. The follow
power that are
supplied to the CU/ voltage must appear respectively.
PU board.
PU ⑦
Pin 1,2,3,4:24V
Pin 5,6,7,8:0VP
Pin 9,10:0VL
Pin 11,13:5V
CU ⑦
Pin 1,2,3:5V
Pin 4,5,6:0VL
Pin 10,11:0VP
Pin 12,13:24V
(2-1-2) Check the system connection
Connection condition Check contents of (1-1).
of Operator Panel Any operation of a printer will not start until the
Operator Panel is detected and is started of its
operation.
45387101TH Rev.1
Action to be taken
Check work
at NG
Supply the AC
power.
Replace the low
voltage power
supply.
Follow the
contents of (1-1).

(2-2) Abnormal sound is heard.

Check item
(2-2-1) Check loss of synchronization of motor (Driver error)
Operating conditions Check if operations of the respective motors are
of the respective normal or not by using the self-diagnostic mode.
motors Check if any load exists or not.
"Buzzer" sound when an error occurs.
Condition of the Check for normal wiring conditions of the
motor cable respective motors.
Perform the visual check and measure resistance
at open circuit with VOM as follows.
Remove the motor cable at the board end.
Measure resistance between the respective pins
of the removed cable and FG with VOM.
(2-2-2) Check loss of synchronization of motor (Abnormal load of the consumable item)
Operating conditions Check if operations of the respective motors are
of the respective normal or not by using the self-diagnostic mode.
motors Check if any load exists or not.
"Buzzer" sound when an error occurs.
6. Troubleshooting and repair procedure
Action to be taken
Check work
at NG
Replace the PU
board.
Replace the
motor cable.
Re-connect the
cable for normal
conditions.
Replace the
corresponding
consumable
item.
If any attempt
of using new
part as a trial
is going to be
made, be sure to
use the System
Maintenance
Menu FUSE
KEEP MODE.
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