Lectrosonics Pro 4 Mini User Manual download pdf (Page 6)

INSTALLATION

The CDM4 RF/power distribution module is permanently installed into the housing assembly and should never need

to be removed except in the rare case of repair. Removal of the CDM4 module requires case disassembly and is

not recommended.

The PRO4 mini is designed to contain up to four CR185 receivers. Installation of these receivers is quite simple.

First, loosen but do not remove the two large counter-sunk phillips head screws in the front and two in the rear

panels of the housing. These screws are located in the horizonal center band of metal between the receivers.

(See Figures 2 and 3) Insert the CR185 receivers, front end first (the end with the antenna connection), in through

the rear panel. Seat the front end of the receiver into the recessed lip of the PRO4 mini front panel. Make certain

the antenna cables are positioned properly through the slot to the right of each opening. The rear panel of the

receiver will extend the same amount as the rear panel of the CDM4 module when the unit is properly seated.

Repeat this for each receiver to be installed. After each receiver is in place, tighten the front panel screws first.

These screws should be fairly snug but excessive force should be avoided and is unnecessary. You are

compressing a natural rubber tension tube. Then tighten the rear panel screws. Press firmly on the front of each

receiver to be certain that there is no slippage and the receivers are secure.

At the front panel, attach the antenna leads to each receiver, making sure the BNC connector is securely twisted

and locked into place. Set the power switch on the CR185’s to the EXT position. Antenna leads serving empty

slots do not need to be terminated.

At the rear panel, insert the power connectors into the power jack of each receiver. Note that the battery

compartment of each receiver may still be opened. It is recommended that each receiver have a fresh battery in

place to serve as backup power in the event that the PRO 4 mini battery pack or external power source fails for

any reason.

OPERATING INSTRUCTIONS

After all the receivers have been installed, check to be sure that the receivers have their power switch set to EXT.

Audio leads should be balanced audio cables leading to the mixer or recorder.

Turn the system on by switching the power switch on the CDM4 module to MAIN-EXT. The power indicator LEDs

should light on all the receivers and the CDM4. If the internal gel-cell batteries are the power source, the 12V LED

will light. If the CH-50 charger is connected and plugged into an AC source, the AC, 12V, and perhaps the

CHARGING LEDs will be on as well. If the power source is an external 12 Vdc power supply, the EXT LED will be

on.

Operate the wireless microphone according to the instructions included with the systems.

After use, recharge the system with the CH-50 adapter. The system incorporates industrial quality gel-cells which

can be recharged regardless of length of use. There are no "memory" problems with these batteries. The

CHARGING LED will activate to indicate the batteries are charging and will extinguish when the batteries are at full

charge.

The CH-50 charger may also be used for AC operation.

The external 12 Vdc power supply may be connected to the system through the 4 pin XLR connector on the rear

panel. The connection is made by supplying the voltage through pins 1 and 4. Polarity is not critical since each

CR185 receiver contains a diode bridge at their external power input. When an external 12 Vdc supply is used the

EXT LED activates. The internal batteries are automatically bypassed by a relay.

In emergencies, the system may also be operated from the internal 9V alkaline batteries in the individual receivers

and the CDM4. Switch all units to the INT power switch position. Operating time should be about 4 to 5 hours with

an alkaline battery, 8 to 10 hours with lithium.

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Lectrosonics Pro 4 Mini User Manual Page 6

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