INSTRUCTION MANUAL R1a UHF Multi-Frequency Belt-Pack IFB Receiver Fill in for your records: Serial Number: Purchase Date: Rio Rancho, NM, USA www.lectrosonics.
R1a Introduction Safety Notes Excessive sound levels can cause permanent hearing damage. 1. Always adjust the volume to the lowest level before listening to unknown transmissions. 2. Use the lowest reasonable level consistent with hearing safety. 3. Don’t use high sound levels in the earphone to overcome high ambient sound levels. That is absolutely foolish! Demand and use high isolation earphones. 4. Don’t expose your ears to sound levels that cause them to ring.
IFB Receiver Table of Contents Safety Notes.............................................................................................................................................................................................2 Introduction..............................................................................................................................................................................................3 Table of Contents........................................................
R1a General Technical Description The IFBR1 was upgraded to the IFBR1a by adding a number of important and useful features: (1) Two rotary HEX switches to manually set the operating frequency, (2) Automatic sensing/control of a mono phone plug to eliminate the mono/binaural switch, and (3) A multicolor LED for battery status. The Frequency scan and memory features were retained.
IFB Receiver Headphone Jack (fig. 1 & fig. 2) On the front panel is a 3.5mm mini phone jack to accommodate a standard mono or stereo type 3.5 mm plug. The unit will drive low or high impedance earphones. The jack is also the receiver antenna input with the earphone cord acting as the antenna. The cord length is not critical but must be at least 6 inches minimum. Strain relief to avoid accidental disconnection can be provided with the included small hook and loop strip.
R1a Receiver Normal Operation (already programmed) 1. Set the Frequency of the receiver to match the frequency of the transmitter by using the two HEX rotary switches located on the side of the receiver under the sliding door. The 1.6M switch is for “coarse” adjustment (1.6 MHz per click) and the 100k switch is for “fine” adjustment (0.1 MHz per click). Setting both to zero (0,0) is the low frequency end of the block and setting both to F (F,F) is the highest frequency end of the block.
IFB Receiver Erase All 5 Channel Memories 1. With power OFF, depress the knob and turn the unit ON. Continue to hold the knob down until the LED starts rapidly blinking. The memory is now erased and the unit will go into scan/search mode. 2. Continue from step 3 above - Add New Frequency.
R1a Troubleshooting Symptom Possible Cause LED not lit • Battery not installed or depleted • Power switch not on. NO SOUND IN HEADPHONE • AUDIO LEVEL turned all the way down. • Headphone plug not inserted fully. • Defective headphone • Transmitter not operating. (See separate transmitter manual.) • Receiver not on the same frequency as the transmitter. Refer to “Programming - Add a New Frequency” on page 6. DISTORTED SOUND • Transmitter gain (audio level) is far too high.
IFB Receiver Replacement Parts and Accessories BEZELKITR1A (full kit) BEZELKITR1A (full kit) Belt clip, bezel, sliding door, belt clip bumper, mounting screws Individual Parts: 26377-1 Bezel 25901 Sliding door IFBR1-M000R 35856 35747 28528 IFBR1-M000R Belt clip assembly 35747 Bumper for belt clip 28528 Belt Clip Screw, 4-40 x 1/4 (1 req’d) 28623 Bezel Screw, 2-56 x 5/16 (2 req’d) PR1A Leather Pouch w/belt clip Knob Guard and related parts: 35854 Hex key wrench 28767 Spring washer 26298-
R1a Specifications and Features Operating frequencies: Block 470 470.100 - 495.600 Block 19 486.400 - 511.900 Block 20 512.000 - 537.500 Block 21 537.600 - 563.100 Block 22 563.200 - 588.700 Block 23 588.800 - 607.900 and 614.100 - 614.300 Block 24 614.400 - 639.900 Block 25 640.000 - 665.500 Block 26 665.600 - 691.100 Block 27 691.200 - 716.700 (export only) Block 28 716.800 - 742.300 (export only) Block 29 742.400 - 767.900 (export only) Block 944 944.100 - 951.
IFB Receiver Service and Repair If your system malfunctions, you should attempt to correct or isolate the trouble before concluding that the equipment needs repair. Make sure you have followed the setup procedure and operating instructions. Check the interconnecting cables and then go through the Troubleshooting section in this manual. We strongly recommend that you do not try to repair the equipment yourself and do not have the local repair shop attempt anything other than the simplest repair.
LIMITED ONE YEAR WARRANTY The equipment is warranted for one year from date of purchase against defects in materials or workmanship provided it was purchased from an authorized dealer. This warranty does not cover equipment which has been abused or damaged by careless handling or shipping. This warranty does not apply to used or demonstrator equipment. Should any defect develop, Lectrosonics, Inc. will, at our option, repair or replace any defective parts without charge for either parts or labor.
