Determining Short Circuit Of Com32 Io Pcb - MIMAKI JV300-130 Maintenance Manual

MAINTENANCE MANUAL > Test Items > Other Test > Determining short circuit of COM32 IO PCB
Model JV300-130/160 Issued 2014.05.30 Revised

5.2.1 Determining short circuit of COM32 IO PCB

 Outline
Check whether the COM circuit generating part of the COM32 IO PCB has electrical trouble or not.
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.
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 PCB. Take care to avoid contact with it.
 Procedure
© 2014 MIMAKI ENGINEERING CO.,LTD.
CN27 CN28
1. Release the top and bottom lock of the connector under the
N27, CN28, CN29, CN30, and CN31 of the COM32 IO PCB,
and disconnect the FFC.
2. Measure a resistance between the test pin (TP) and GND on the
COM32 IO PCB ASSY to determine the COM circuit condi-
tion.
Connect the negative terminal of the tester to the GND test
pin and measure the resistance by getting the positive terminal
touch to TP with the following.
Measured value of each test pin should be in the range of 16K
ohms to 18K ohms.
F/W ver 1.00 Remark
CN30 CN31
On the COM32 IO PCB,
TP under CN27 (TP1, 5, 2, 6, 9, 13, 10, 14),
TP under CN28 (TP3, 7, 4, 8, 11, 15, 12, 16),
TP under CN30 (TP17, 21, 18, 22, 25, 29, 26, 30),
TP under CN31 (TP19, 23, 20, 24, 27, 31, 28, 32),
Rev.
1.0
1
2
3
4
5
6
7
8
5.2.1 R.1.0 P.1