Operation Monitor (Lcd Screen) - MES SQA-Vision Service Manual

SQA-Vision
Operation Operation Monitor - Lower LCD Screen (Part# LCD-0009)
Monitor
ISSUE #1: The SQA-Vision is ON, both power indicators are functioning and the fan is
working. But the LCD screen (Operation Monitor) is not illuminated although data is displayed
on the screen.
PLEASE NOTE: The instructions depend on the SERIAL NUMBER (SN#) of the SQA-V.


SECTION 1:

SN #5228

and below
Note: Turn off
the power
supply to the

SQA-Vision
and disconnect
the power
supply cable
from the back
of the device
before opening
the SQA-V.
WARNING:
Do not touch the
backlight lamp and
inverter board
while SQA-Vision is
on! There is a risk
of HIGH VOLTAGE
shock!

SECTION 2: 
SN #5229

and above
Note: Turn off
the power
supply to the

SQA-Vision
and disconnect
the power
supply cable
from the back

of the device
before opening
the SQA-
Vision.
WARNING:
Do not touch the
backlight lamp and
inverter board
while SQA-Vision is
on! There is a risk
of HIGH VOLTAGE
shock!

Edition rev.: Jan 2020
Service Manual Version 109.13.4
SN# 5228 and below – follow the instructions in SECTION 1
SN# 5229 and above – follow the instructions in SECTION 2
Open the SQA-Vision.
Turn on the SQA-Vision and check that the
LCD Backlight is lit. If not, check the input
and output cables of the inverter board:
verify that the cables are well connected and
not loose.
If the power supply is OK and the screen
doesn't light up, replace the inverter board
(Item#AS-9084111):
 Turn the SQA-Vision off and disconnect
the cables connecting the inverter board
to the main board and LCD screen.

Using a Phillips screwdriver, remove the
two screws that secure the old inverter
board.
 Replace the inverter board with a new
one and secure it with the two screws.
 Re-connect the cables of the inverter
board.
If the problem persists, contact MES
Customer Support.
Open the SQA-Vision.
Turn on the SQA-Vision and check that the
LCD Screen is lit. If not, check the input and
output cables of the Backlight PCB: verify
that the cables are well connected and not
loose.
If the power supply is OK and the screen
doesn't light up, replace the long flat cable
connects the main board and the Backlight
PCB. (Item #KHD-908-000858)
If the screen doesn't light up after changing
the long flat cable, replace the Backlight PCB
(Item#V-B-01410-00):
 Turn the SQA-Vision off and disconnect
the cables connecting the Backlight PCB
to the main board and LCD screen.
 Using a Phillips screwdriver, remove the two screws that secure the old Backlight
PCB.
 Replace the Backlight PCB with a new one and secure it with the two screws.
 Re-connect the cables of the Backlight PCB.
If the problem persists, contact MES Customer Support.
Inverter Board
Cables connecting the inverter board
to the main board and LCD screen
15
Backlight Lamp
Data Cables LCD Screen
Backlight PCB
Power Cable