- 19 -
DX 949
MAINTENANCE
5.0 PRECAUTIONS
The inherent quality of the solid-state components used in this transceiver will provide many years
of continuous use. Taking the following precautions will prevent damage to the transceiver.
(i) Never key the transmitter unless an antenna or suitable dummy load is connected to the antenna
receptacle.
(ii) Ensure that the input voltage does not exceed 16 VDC or fall below 11 VDC.
(iii) During alignment, do not transmit for more than 10 seconds at a time. Transmitting over long
periods can cause heat built-up and cause transmitter damage.
5.1 PERIODIC INSPECTION
This unit is aligned at the factory to deliver maximum performance. However, continued
performance cannot be expected without periodic inspection and maintenance. Important points to
be checked regularly are as follows;
Check Item
Action
Whip antenna
(option)
If cracked or broken, replace it.
Coaxial cable
If sheath is cracked, seal with
vinyl tape. If immersed with
water, install new coaxial cable.
Coaxial & power
plug connections
If loosened, reconnect. If
corroded, clean contacts.
Battery
connection If corroded, clean power
terminals.
Ground terminal
If corroded, clean terminal.
5.2 FUSE REPLACEMENT
To protect the equipment from serious damage, one fuse are provided on the power supply lines.
The fuses protect against over voltage / reverse polarity of the vehicle’s mains or internal fault of
the equipment. If the fuse has blown, first find out the cause of the trouble before replacing it. A
fuse rated for more than 4A should not be used, since it may permanently damage the equipment.
Damage due to over fusing is not covered by the warranty.
CHAPTER 6
Summary of Contents for DX 949
Page 1: ......
Page 13: ...12 DX 949 CIRCUIT DIAGRAM...
Page 14: ...13 CHAPTER 4...
Page 18: ...17 Figure 4 2 Receiver test setup...
Page 19: ...18 Figure 4 3 Main PCB Adjustment Locations CHAPTER 5...
Page 23: ...22...
Page 29: ...28 DX 949 MAIN PCB REMARK SOLDER SIDE WHITE...
Page 33: ...32...
Page 34: ...33 AT0949040A...
Page 35: ...34...
