MIMAKI JV300-130 - Determining Short Circuit of COM32 IO PCB

© 2014 MIMAKI ENGINEERING CO.,LTD. 5.2.1 P.1
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MAINTENANCE MANUAL > Test Items > Other Test > Determining short circuit of COM32 IO PCB
Model JV300-130/160 Issued 2014.05.30 Revised F/W ver 1.00 Remark
1.0
Rev.
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.
 Procedure
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.
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),
Measured value of each test pin should be in the range of 16K
ohms to 18K 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.
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.
TP14 TP10 TP13 TP9 TP6 TP2 TP5 TP1 TP16 TP12 TP15 TP11 TP8 TP4 TP7 TP3
TP30 TP26 TP29 TP25 TP22 TP18 TP21 TP17
TP32 TP28 TP31 TP27 TP24 TP20 TP23 TP19
CN27 CN28
CN30 CN31