LT-6753 Rev 0 August 2023 Page 1 of 2
QMB-5000B
Audio Motherboard and
Card Cage
Contents:
• QMB-5000B Audio Motherboard Card Cage
• 4 screws for the deadfront and 4 hex nuts for mounting into QBB-5001R
The QMB-5000B Audio Motherboard Card Cage can be installed in one enclosure, the QBB-5001R Expansion
Audio Cabinet.
See manual LT-894/ LT-894SEC for installation and wiring information.
Figure 1 QMB-5000B Audio Motherboard and Card Cage and Mounting Hole Locations
4 Screws
Deadfront
Backplane
Amplifier Slot Positions
2 3 4 5 6 7 8
Amplifier Guide
Rails
Mounting
Holes
LT-6753 Rev 0 August 2023 Page 2 of 2
Place card cage over the four studs located in the QBB-5001R. Fasten the amplifier card cage to the backbox
using the four hex nuts provided with the QMB-5000B.
Figure 2 Placement of QMB-5000B Audio Motherboard in QBB-5001R Expansion Audio
Cabinet
12 VDC BATTERY 12 VDC BATTERY
INLINE FUSE 50A
- BATTERY +
XFORMER
Black
Black
120 or
240 VAC
Input
IN OUT
Red
Red
QBC-5000N
QMB-5000B
Motherboard
BATTERY
CHARGER
CONNECTORS FOR MULTIPLE
QMB-5000B MOTHERBOARDS
SLOT #1
CONNECTOR IS
NOT USED
SLOTS #2 - #8
CONNECTORS FOR
QAA- STYLE AMPLIFIERS
CONNECTOR FOR QBC-5000N
BATTERY CHARGER
QPS-5000N
POWER
SUPPLY
TS1
JW1
Orange-Yellow-Orange
(MUST BE IN CORRECT ORDER)
This represents the
Battery Disconnect
Relay located on the
left side of the box.
Battery
Disconnect
Relay
L N
/
