FRICK
QUANTUM™LX AcuAir
CONTROL PANEL 090.510-M (OCT 10)
MAINTENANCE Page 7
remove the DVM probes from the Quantum™, and
install them into the white connector on the last I/O
board in the daisy-chain, as shown below:
Check the reading on the DVM. If the reading at the
Quantum™ has been adjusted properly, then this
reading can be no lower than +5.0 DC. If the voltage
is less, check all of the daisy-chain connections on
the blue DC-I/O harness. Ensure that all of its
connectors are tight. If all connections are good, then
go back and start measuring over again, this time
beginning at the first board in the daisy-chain.
Continue checking the voltage at each connection,
until you locate the point at which the voltage drop is
excessive. This will usually indicate a connection that
is not being made properly, or the sockets within the
connector are weak. In either case, the DC-I/O wire
harness may need replacing.
Next, you will want to measure the +12 Vdc. Perform
the same steps as with the +5 Vdc measurement, with
the exception that you will not need to measure at the
Quantum™. Measure directly at the last connection. If
the voltage is low, ensure that there is not an
excessive voltage drop in the daisy-chain. If the
voltage is out of range, then the supply itself may
need replaced.
The -12 Vdc may be measured the same as the other
voltages, however, this voltage is not adjustable on
any supply, so if the harness is not the culprit, the
supply may need to be replaced.
REPLACEMENT
If the power supply is found to be bad, or not capable
of acceptable adjustment, it will need replacing. When
ordering this replacement, you will receive an upgrade
kit. The purpose of this kit is to allow for the upgrading
of the I/O DC power harness, at the same time as
replacing the power supply. Refer to the
Recommended Spare Parts list for the upgrade part
number. This upgrade kit will include the following
components:
Screws (6-32 x 3/8 flat head)
Power supply (Condor)
DC power cable harness (this is an improved
version of the previous power cable)
+5 DC Voltage Measurement Location
+5V
RET
PL13
LK9
LK8 LK10
PL16
PL8
PWR
SUSP
FLASH
LK11 LK12
PL24
PL3
PL
LK1
PL7
PL9
LK2
PL17
PL12
PL19
PL18
PL14
PL10
PL6
PL2
PL4
PL1
Flash Card
Socket
(Located
under
board)
PL3
PL5
PL11
LK3
A
B
LK4
PL15
TB1
TB2
LK2
COM-2
TB3
RS-232
3
2
1
LK6
B A
LK5
LK7
COM-2
COM-1
1
2
3
4
1
2
3
4
LK8
LK7
LK10
LK9
D3
LK16
A
B
A
B
PL2
3
4
5
O
7
0
1
2
D8
D10
D11
D12
PORT 80H
D4
D5
D7
D13
SW1
ON
1
2
3
4
5
6
7
8
D6
D2
LK11
B
A
LK1
LK4
LK3
LK6
LK5
D1
D8
LK17
RS-422
RS-485
RS-422
RS-485
PL1
+5 VDC
(Red Lead)
Common
(Black Lead)
A voltage
regulator to
the flash port
allows the
Quantum™ 4
5 VDC to be
set to
+5.15VDC to
5.20 VDC as
measured
here.
