© 2014 MIMAKI ENGINEERING CO.,LTD.
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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
TP1
1
TP8
TP4
TP7
TP3
TP
30
TP
26
TP
29
TP
25
TP
22
TP
18
TP
21
TP
17
TP
32
TP
28
TP
31
TP
27
TP
24
TP
20
TP
23
TP
19
CN27
CN28
CN30
CN31