Power Supply Unit - MES SQA-V Gold Service Manual

SQA-V
and
Power Supply Unit – PSU
Power
Supply
ISSUE: The main switch is ON but the power
indicator does not light up and the fan is not working.
Unit (PSU)

NOTES:
1. Turn off the

power supply
and disconnect

the power
supply cable
from the back

of the SQA-V
before
opening.
2. Refer to the
How to check the input connector:
Appendix

section for
instructions on
how to address
power supply
problems.


How to check the output connector:
Note:

Before
checking the

input\ output
connectors of
the main PSU,
turn on the
SQA-V from
the switch on
the rear panel.

Replacement of the Power Supply Unit –
Power
Supply Unit
ISSUE: The power supply and/or cables are not
(PSU)
working.
PLEASE NOTE: The instructions depend on the
SERIAL NUMBER (SN#) of the SQA-V.


SECTION 1:
1. Turn off the SQA-V and disconnect the power cable from the rear panel.
SN #1329
2. Place the SQA-V on its side; Using a #1.5 Philips screwdriver, remove the three screws
and lower,
that connect the PSU to the rear panel. Open the SQA-V.
PSU part #:
3. Remove the black plastic cover from the PSU.
PSD-0492
Service Manual 24_Apr_2014
Check the fuse in the fuse box located on the
rear panel of the SQA-V.
Replace the fuse if it is burned out.
Reconnect the power supply and turn the unit
back on.
If the unit still does not work, check the
input/output power inlet as instructed below.
Check the voltage in the input connector of the
main PSU using a multimeter

OV: black wire

220V AC: red wire
If no power is evident, replace the power inlet
(see paragraph 7)
If power is being supplied to the input
connector, check the output connector.
Disconnect the output cable from the
motherboard.
Check the voltage in the
output connector of the main PSU using a
multimeter:

0V: black wire

+5V: red wire

+12V: purple wire

-12V: white wire
If there is still no power supply in the output
connector, OR if the power is working but
the problem continues contact support
services.
SN# 1329 and less – follow the instructions in
SECTION 1
SN# 1330 and greater – follow the
instructions in SECTION 2
Power Supply Power Cable
15
Power Supply Board
Unscrew the
Power Supply Unit (PSU)