Power Supply (Psu) - MES SQA-V Gold Service Manual

and
Note:
How to check the output connector:
Before checking

the input\ output
connectors of
the main PSU,

turn on the SQA-
V from the
switch on the
rear panel.

Power Supply 7. Replacement of the Power Supply Unit
Unit (PSU)
ISSUE: The power supply and/or cables are not
Note:
working.
Turn off the
main On/Off
PLEASE NOTE: The instructions depend on the SERIAL
switch and
NUMBER (SN#) of the SQA-V.
disconnect the
power cord from

the device inlet
before opening.

SECTION 1: 1. Open the SQA-V
SN #1329
2. Disconnect the two cables of the faulty PSU:
and below,
 Input connector- location P1
Old PSU P/N:
PSD-0492
 Output connector- location P2
3. Place the SQA-V on its rear side
4. Using a #1.5 Philips screwdriver, remove the three
screws that connect the PSU to the rear panel
5. Replace the faulty PSU
6. Secure the new PSU to the rear panel using the
same three screws
7. Re-connect the input and output cable connectors
to the new PSU
8. Close the SQA-V
If the problem persists - Contact Customer Support
SQA-V
Service Manual Dec_2019
Disconnect the output cable from the
motherboard.
Check the voltage on the
output connector of the main PSU using a
multimeter:
Black wire: GND

Red wire: +5V±0.3

Purple wire: +12V±0.8

White wire:


-11.3V to -13.3V: New PSU

-16.1V to -12.7V: Old PSU
If there is no voltage on the output connector,
or if the voltage is out of the range – please
replace the faulty PSU. If the problem persists -
contact support services.
SN# 1329 and below – follow the instructions in
SECTION 1
SN# 1330 and above – follow the instructions in
SECTION 2
17
Check the voltage on output
connector
Old version PSU
(SN #1329 and below)
Unscrew the
Power Supply Unit (PSU)
Disconnect the cables