Furuno FAR-2107 Series Service Manual page 128

FAN (24 VDC)
Internal heat is agitated.
J921 (TX_HV)
RTR-079 (25 kW)
VR1 (Power Adj.)
This hole is used to access VR1 on MD board
(03P9244) for magnetron current adjustment at factory.
PM-31 Connection
Fig. 2.2.2 Scanner Unit with Cover Removed (1)
Fig. 2.2.3 Scanner Unit with Cover Removed (2)
2-12
2.2 Scanner Unit
IF Board (03P9335A)
J921 (HV)