MIMAKI TS34-1800A, Maintenance Manual

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© 2011 MIMAKI ENGINEERING CO.,LTD. 5.2.4 P.1
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MAINTENANCE MANUAL > Test Items > Other Test > Checking Damage of the HDC PCB ASSY
Model TS34-1800A Issued 2011.10.17 Revised F/W ver 1.20 Remark
1.0
Rev.
5.2.4 Checking Damage of the HDC PCB ASSY
 Outline
Check whether the COM circuit (for Head 2) on the HDC PCB ASSY has trouble or not.
 Procedure
1. Release the locks on both sides of the connector for HDC_FFC
ASSY connected to CN5 and CN6 on the HDC PCB ASSY.
And then pull out the HDC_FFC ASSY.
2. Measure a resistance between the test pin TP1 to TP8 on the
HDC PCB ASSY to determine the COM circuit condition. Con-
nect the negative terminal of the tester to the GND test pin 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 F3 (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.
CN6
CN5
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 HDC
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.
F3
TP8
TP1
If ERROR 205 [42V HEAD VOLTAGE] occurs, F3
(fuse) may be blown.