3.9Checking Magnetron Heater Voltage
Magnetron heater voltage is formed on the MD Board of the scanner unit, and is preadjusted at the factory for use with any length of signal cable. Therefore no adjust- ment is required. However, check magnetron heater voltage as follows:
1.Turn on the radar and leave it in stand- by.
2.Open the scanner cover.
3.Unfasten two screws to remove the RF section cover.
DANGER
ELECTRICAL SHOCK HAZARD
This check is done with the power on — DO NOT touch the magnetron.
Magnetron | Unfasten two |
| screws. |
5.Confirm that the meter reads 7.5 V ± 0.1 V.
6.Close the scanner cover and tighten the cover fixing screws.
Figure 3-8 Scanner unit, cover opened
4.Connect a multimeter, set to 10 VDC range, between test point J825#4 and J825#6(GND) on the RTB Board (03P9249).
Measure voltage at this connector (J825).
