Mecmesin Multitest 0.5d - Fault finding and cure; Stand wont turn on; LCD fails to illuminate

Multitest 0.5d, 1d & 2.5d
Service and Repair Manual
Number 022-005
Issue Number: 08
Page 38 of 58
25. Fault finding and cure.
For explanation of the RS232 loom and SPI loom please refer to section titled What
are the SPI and the RS232 looms?
Quick Reference Guide
Fault
Section
Stand will not turn on
1
LCD fails to illuminate
2
LCD illuminates but has no display
3
Error 02 is displayed on screen
4
Error 06 is displayed on screen
5
Over travelled is displayed on screen
6
Opto on limit switch fails to work
7
Crosshead fails to move
8
Stand fails to communicate with the gauge
9
Stand fails to communicate with the pc
10
Stand fails height test
11
Stand fails load test
12
Stand fails speed test
13
Speed reading is erratic/jumpy or speed is all
over the place when I turn speed dial
14
Error 09 is displayed on screen
15
Stand resets itself. (Switches on and off).
16
Stand times-out / Cross-head only travels a
short distance.
17
1) Stand won’t turn on:
116. Check fuses in mains inlet filter and ensure it is a 2A time lag (T) Check that all
the looms are connected and in the right positions.
117. Connect a D.V.M to the orange and yellow wires of the transformer to check for
correct voltage 24-28V AC.
118. Check between TP 2 and TP 1 for a voltage greater that 27 – 31 V DC
119. Check between TP 3 and TP 1 for a voltage of approx 20V DC
120. Check between TP 4 and TP 1 for a voltage of 5V DC
121. If all of above is ok then reprogram the motor control PCB and the front panel
PCB.
122. If the stand still fails to turn on, replace the motor control PCB.