Voltage Regulators; Handset Voltages; Junction Box Voltages - Codan NGT 2010 RF Technical & Service Manual

Voltage regulators

None of the voltage regulators are adjustable. However, the output voltages can be
checked.

Handset voltages

The supply voltages for the handset are shown in
Drawing
Table 34: Supply voltages for the Handset PCB in the handset
Supply
Standby
Handset power
+5 V
–9 V

Junction box voltages

The supply voltages for the junction box are shown in
Drawing
Table 35: Supply voltages for the Audio PCB in the junction box
Supply
A (protected)
+10 V
+5 V
+5 VQ
Drawing
Table 36: Supply voltages for the Microprocessor PCB in the junction box
Supply
+5 V
A (protected)
NGT Transceiver System Technical Service Manual
08-05300
Description
+5.4 V when transceiver is off
+9.2 V when transceiver is on
+5 V regulated supply
–9 V for IC7
08-05470 or 08-05986 (sheet 1)
Description
Unregulated battery supply
+10 V regulated supply
+5 V regulated supply
+5 V quiet for opamp bias
08-05317
Description
+5 V digital supply
Unregulated battery supply
NGT—Checks and adjustments
Table 34.
Source
ext
ext
IC10
IC5
Table 35 and Table
Source
ext from RF unit
IC12
IC13
IC13 (filtered)
Source
IC13
from RF unit
36.
147