© 2000 Marchand Electronics Inc. PO Box 473, Webster, NY, 14580 www.marchandelec.com (716) 872 0980 FAX: (716) 872 1960
5
Assembly Instructions for the MB201 Kit.
Parts list.
Qu. Description
2PM124 Kit, Power Amplifier+manual
1PS11 Kit, power supply+manual
1MB201 Cabinet
base cover
front panel rear panel
2heatsinks
1500VA power transformer,
45V+45V secondary
1Transformer bracket & hardware
1DPDT AC Power switch
2XLR connector,female
2RCA connector, red & black
4DPDT slide switch
2Dual binding post w. spacer
16 A circuit breaker
1Power entry connector
1Thermal cutout
1Resistor, 10K, 2W
5’ AWG22 hookup wire, red
5’ AWG22 hookup wire, orange
5’ AWG22 hookup wire, black
1’ AWG22 hookup wire, green
5’ AWG20 hookup wire, red
5’ AWG20 hookup wire, orange
5’ AWG20 hookup wire, black
1100 Ohm, 1W resistor
2solder lug
98/32 Hex head bolt
9#8 split lock washer
86/32 x 1/4” Machine Screw
41/2” Hex Treaded Standoff
26/32 x ½” Machine Screw
26/32 lock nut
64/40 x ½” Machine Screw
64/40 lock nut
82/56 x ½” Machine Screw
82/56 lock nut
1heatsink compound
Assembly instructions.
Before assembling the MB201 amplifier
complete the assembly of the two PM124 power
amplifier boards and the PS11 power supply
board.
Rear panel: Remove the rear panel from the
cabinet before starting this assembly. Mount the
following parts to the rear panel:
4 DPDT switches using 2/56 hardware.
2 XLR connectors using 4/40 hardware.
2 RCA connectors, one red, one black.
2 Pair of binding posts
Circuit breaker
Power entry module.
Use Figure 5as a guide when wiring up above
parts according to the wiring diagrams. The
wires going to the binding posts should be
twisted. The wires going to the inputs of the
PM124 modules should be twisted together in
two pairs of three. Leave plenty of wire length
for those wires going from the rear panel to
internal components. They will be trimmed to
length later.
After the assembly is completed the rear panel
can be bolted to the rear of the chassis using
6/32 machine screws and locknuts.
Thermal cutout: Mount the thermal cutout onto
the base plate of the cabinet using 6/32
hardware.
Power Switch: Install the power switch to the
front panel. Leave the front panel off for now.
Transformer: Install the toroidal power
transformer onto the baseplate of the cabinet
near the front. Use the mounting dish and the
two rubber washers. See Figure 6
Wiring note: Use the heavy gauge wire for the
AC wiring to and from the power transformer
and for the DC power supply wiring from the
PS25. Use the smaller gauge wire for all other
interconnect.
AC Wiring: Complete the AC wiring according
to the wiring diagram. Run the wires near the
edge of the chassis closest to the thermal
cutout. Use a length of green wire and a solder
lug to install the chassis grounding wire. The
solder lug should be placed under one of the
6/32 nuts that hold the rear panel.
