Motorola Xir M3688 Service Manual [work]

The PA module is ESD sensitive. Ground yourself before handling.

Aeroflex/Cobham, Freedom Communication, or Rohde & Schwarz analyzer capable of testing DMR (digital) and analog RF metrics.

Synthesizer out of lock, damaged antenna switch, or failed receiver front-end. motorola xir m3688 service manual

Understanding the internal capabilities of the XiR M3688 is the first step in effective servicing. The radio operates on both analog and digital modes using MOTOTRBO technology.

Specific chapters for the Control Head and Controller. The PA module is ESD sensitive

Information required to replace specific parts on PCBs.

Component-level servicing or performance alignment cannot be done safely with basic hand tools. To prevent permanent damage to the surface-mount technology (SMT) or the internal multi-layer boards, assemble the following workstation equipment: Synthesizer out of lock, damaged antenna switch, or

– Specific alignment and repair data for low-power models.

Desolder the main antenna connector lead from the PCB if required by your specific board revision, or verify if it uses a compression contact footprint.

(Motorola Publication) typically covers "Levels 1 and 2" maintenance. Service Maintainability : Overview of repair philosophy and tools required. Block Diagrams

Use a chassis tool to release the side clips holding the front control head to the main die-cast aluminum chassis. Gently disconnect the flex ribbon cable connecting the front panel to the main board.