Replacement Of Mic - Furuno FAR-2107 Series Service Manual

2) Method for adjusting the heater voltage
Basically, there is no need for adjusting the heater voltage in the field. The heater
voltage is measured at J833-#11 and-#12 on the PWR (RF) board.
- In ST-BY, S1-M1 pulse state:
Adjust R28 on the PWR (RF) board so as to achieve the voltage specified.
- In TX, M2-L pulse state:
Adjust R32 on the PWR (RF) board so as to achieve the voltage specified.
R28(Maｇ. H)
R32（Maｇ. L）

4. Replacement of MIC

If the MIC is damaged, the R. MONITOR values are substantially varied.
When replacing the MIC alone, it may be damaged if radar waves from other ship get
into it. When replacing the MIC, be sure to do replacing works in a room or a ship so
as to prevent radar waves from getting into the MIC.
After the replacement, be sure to execute "TUNE INITIALIZE".
- Setting of "TUNE INITIALIZE: [Menu] -> 1 -> 3:TUNE INITIALIZE"
Fig. 6.5.2 Adjustment of the Heater Voltage
6-44
6.5 Replacement of Major Parts
Checking of
heater voltage
(J833-#11-#12)
Model
FAR-2x17
FAR-2x27
FAR-2827W
FAR-2x37S
FAR-2x37SW
HEATER
Tx/L
7.4 to 7.6
STBY/S
Tx/L 6.5 to 7.5
STBY/S 8.2 to 8.4
Tx/L 7.2 to 7.8
STBY/S 9.1 to 9.3