© 2011 MIMAKI ENGINEERING CO.,LTD.
5.2.3
P.1
R.1.0
MAINTENANCE MANUAL > Test Items > Other Test > Checking Damage of the Main PCB ASSY
Model
TS34-1800A
Issued 2011.10.17 Revised
F/W ver
1.20
Remark
1.0
5.2.3 Checking Damage of the Main PCB ASSY
Outline
This is the test to check that there is no defect in the COM circuit (for Head 1) and the motor (XY driving) on the
main PCB.
Procedure
1. Release the locks on both sides of the connector for HDC_FFC
ASSY connected to CN1 to CN4 on the main PCB ASSY. And
then pull out the HDC_FFC ASSY.
2. In the same manner as the COM circuit check, measure a resis-
tance between the test pin TP1 to TP8 and GND on the main
PCB ASSY to determine the COM circuit condition. Connect
the negative terminal of the tester to the GND test pin (GND1 to
9) and measure the resistance by getting the positive terminal
touch to TP1 to 8.
Measured value of each test pin should be in the range of 17K
ohms to 18K ohms.
3. Measure the resistance on both ends of F13 (fuse) to check the
blown fuse.
Measured value of the fuse should be less than 5 ohms.
After turning off the sub and main power switches in order, unplug the power code.
Check if no electric charge is remaining in the PCB.
Refer to the "4.4.2 Electric charge checking when replace the Electrical Parts"
It is very dangerous if sleep mode functions mistakenly during the operation.
Moreover, the PCB may be damaged in case electric charge still remains inside.
Also there is a possibility of electric shock because of high power voltage applied the high-pressure part
of the power supply PCB assy. Take care to avoid contact with it.
TP8
TP1
If the machine cannot be turned on, it is highly possi-
bility of impedance anomaly of the COM circuit and
short circuit between 42V and GND in the main
PCB.
If all the measured value of the TP is shown in the
abnormal range, compare with the measured value of
the normal circuit board since it may be variation of
the tester.
F13
If ERROR 205 [42V HEAD VOLTAGE] occurs, F13
(fuse) may be blown.
