Lectrosonics Pro 4 Mini - Manual (Page 5)

REAR PANEL DESCRIPTION
SERIAL/FREQUENCY LABEL - This label indicates the serial number of the CDM4 module. It also indicates the
RF pass-band of the unit. IMPORTANT - The CR185 receivers installed in the unit must fall between the
frequencies indicated on the label. Serious signal loss results if the receivers are outside the RF pass-
band.
POWER XLR CONNECTOR - This 4 pin Switchcraft D4M connector is the power input jack for both the CH-50 AC
charger and for external 12V power. Pins 1 and 4 are used for 12 Vdc input. Pins 2 and 3 are utilized for 14 to 20
Vac charging voltage.
POLARITY DIAGRAM - The polarity diagram on the lower panel indicates the wiring connections for the 4 pin XLR
power connector. Use this diagram when connecting your own external power source to the system.
9V ALKALINE BATTERY COMPARTMENT - The CDM4 module can operate from an internal 9V alkaline battery.
Only alkaline or lithium batteries are recommended. Poor results may be expected with other battery types. This
compartment opens by pressing in and to the right. The compartment will adjust to various battery sizes.
POWER LEADS - These connectors provide power for the individual receivers. Insert the connectors into the jack
provided on each receiver.
INSTALLATION SCREWS - The two large counter-sunk phillips head screws in the central area between the
receivers are used for receiver installation and removable. See page 5 for further instructions.
RECEIVER AUDIO OUTPUT - Supplies a balanced, low impedance output at microphone level. The audio signal
is output on pins 2 and 3, while pin 1 is ground. The output level of this jack is controlled by the OUTPUT control
on the front panel of the receiver. The connector is a standard XLR type.
RECEIVER POWER IN JACK - Connects to the POWER LEAD for powering the receiver from the PRO 4 mini
source. A diode bridge is used in the external power input, so that the CR185 will operate properly from either
polarity.
Figure 3 - PRO 4 mini Rear Panel
4