Related Manuals for Ericsson LBI-38310A
Summary of Contents for Ericsson LBI-38310A
- Page 1 LBI-38310A Maintenance Manual 900 MHz CONVENTIONAL STATION RECEIVER Ericsson Inc. Private Radio Systems Mountain View Road Lynchburg, Virginia 1-800-528-7711 (Outside USA, 804-528-7711) Printed in U.S.A.
- Page 2 CIRCUIT ANALYSIS Synthesizer This manual is published by Ericsson Inc., without any warranty. Improvements and changes to this manual necessitated by RECEIVER BOARD typographical errors, inaccuracies of current information, or improvements to programs and/or equipment, may be made by Ericsson Inc., at any time and without notice.
- Page 3 LBI-38310 VCO Q3 operates at 70.450 MHz. The circuit is tuned by applied through J602 on the audio board. Power is supplied L11. The output of the VCO is coupled through buffer amp Q4 from a regulated 10 volts from the system board at P904-14. and RF amp Q2, and applied to the divide-by-four counter, U9.
- Page 4 LBI-38310 Pin 2 of U606-10 is connected to the system board through Noise Amp, Filter & Level Detector The squelch input to the level detector is at U603D-10. To service the receiver from the top: P904-6 (SQ DISABLE) so that the receiver audio stages can U603D-11 is referenced to 4 Volts from voltage divider R640 and 1.
- Page 5 LBI-38310 Figure 3 - Latching Knobs Securing Door Figure 4 - Access To Receiver...
- Page 6 ADJUSTMENT PROCEDURE LBI-38310 ADJUSTMENT PROCEDURE RF INPUT RSSI -40 dBm 4.5 Vdc The conventional receiver has no field adjustments for peak- -60 dBm 4.5 Vdc ing up performance. However, should it become necessary to replace components at the customer location, the following -80 dBm 4.0 Vdc adjustments may be required.
- Page 7 OUTLINE DIAGRAM LBI-38310 TOP VIEW BOTTOM VIEW (19D902083, Sh. 3, Rev. 2) (19D902083, Sh. 4, Rev. 2) RECEIVER BOARD...
- Page 8 SCHEMATIC DIAGRAM LBI-38310 (19D902107, Rev. 5) RECEIVER BOARD 19D902083G1...
- Page 9 OUTLINE DIAGRAM LBI-38310 (19D902181, Sh. 1, Rev. 0) (19D902182, Sh. 1&2, Rev. 3) AUDIO BOARD 19D902181G1...
- Page 10 SCHEMATIC DIAGRAM LBI-38310 (19D902183, Rev. 1) AUDIO BOARD 19D902181G1...
- Page 11 PARTS LIST LBI-38310...
- Page 12 PARTS LIST LBI-38310...
Need help?
Do you have a question about the LBI-38310A and is the answer not in the manual?
Questions and answers