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Workshop CRT Inoperative: ME250 Technical Committee

While anchored at a Japanese port, a bulk carrier from 1990 experienced an alarm that the CRT display in the workshop was inoperative. Upon investigation, it was found that the semiconductors in the signal converter between the control unit and sub-control panel had deteriorated due to aging, causing the failure. The defective parts were replaced with spares, restoring normal operation.

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Kupujem HN
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37 views2 pages

Workshop CRT Inoperative: ME250 Technical Committee

While anchored at a Japanese port, a bulk carrier from 1990 experienced an alarm that the CRT display in the workshop was inoperative. Upon investigation, it was found that the semiconductors in the signal converter between the control unit and sub-control panel had deteriorated due to aging, causing the failure. The defective parts were replaced with spares, restoring normal operation.

Uploaded by

Kupujem HN
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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ME250
Workshop CRT Inoperative
Technical committee

Ship type Bulker


Date of build January 1990 at NKK Corporation, Tsu
Navigation route Tramper
Trouble machinery
Category Automation/instrumentation
Name Signal converter
Type
Date of trouble At 0400hrs. on January 7, 1993, while anchored

1. Outline of breakdown
While anchored at a Japanese port, an M0 alarm occurred. Upon rushing to the control room, an alarm of
SUB-CONTROL PANEL (located in the workshop) CRT FAIL was found displayed on the CRT of the
control room. Entering the workshop, staff attempted to operate the CRTs display buttons but could not
activate the CRT.

2. Cause
From an investigation, the cause was surmised to be deterioration due to aging of semiconductors in the
signal converter between the control unit and the sub-control panel.

3. Repair
The parts concerned were replaced with spares and operation was restored to normal.

1
The Marine Engineer Oct.1994
RETURN

Fig. Electrical circuit of failed part

2
The Marine Engineer Oct.1994

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