Motorola VRS750 Service Manual

Transceiver Disassembly 1. Detach the RF cable assembly from the right-angle SMB connector on the interface board. 2. Turn over the interface board. Remove the flex connector retainer, 4285168D01. 3. Gently lift the clasps of the 20-pin and 40-pin flex connectors. Remove the 20-pin and 40-pin ends of the flex cable from the transceiver leaving the 30-pin end attached to the interface board. 4. Loosen the screws for the two retainers holding the transceiver to the interface board. Slide one of the retainers away from the ed ...

sealing of unit. Transceiver Reassembly 1. Screw the RF adapter plug into the transceiver. Tighten until the stop on the adapter is fully seated in the RF jack. 2. Connect the RF coax cable to the RF adapter. 3. Place the transceiver in between the two retainers, sliding one sideways if needed. 4. Adjust the retainers so that they align with the groove between the transceiver board and its chassis. Tighten the four screws of the retainers. If needed, adjust the screws so that the transceiver lays flat against th ...

• Status (from the Control Head)—Trunking or Conventional • Emergency Call—Trunking or Conventional—Emergency Call and VRS are mutually exclusive. Even if the mobile is programmed for Alarm and Call, when the Alarm case is exited, the mobile will not transition into Emergency Call while the VRS is activated. Likewise, if the mobile is in Emergency Call, the VRS cannot be activated. NOTE: When an Emergency Alarm is received, the dispatcher may elevate that talkgroup to Emergency status. • Reprogram Request—Trunking � ...

• wait for the confirmation tone, and • return the channel selector to a voice channel. The VRS will not perform a portable-to-base audio repeat while the portable is transmitting on a “message request” channel. NOTE: A message cannot be generated from the control head while the VRS is activated. Status The VRS will command the ASTRO mobile to send out a CPS- programmed status on the mode currently displayed on the control head, in the same manner as if the request to send status had been generated using the control head. The VRS will send out ...