Codan 9323 - Page 8

Table of contents
vi HF SSB Transceiver 9323/9360/9390/9780 Technical Service Manual
Voltage regulators.................................................................................................7-3
Crystal oven..........................................................................................................7-4
Test mode..............................................................................................................7-5
Accessing Test mode...................................................................................7-6
Test channels for 2.0 to 26.5 MHz PA assembly........................................7-7
Test channels for 2.25 to 30 MHz PA assembly (1.6 to 30 MHz
with Option LF fitted) .................................................................................7-8
VCO checks and adjustments.............................................................................7-10
VCO1 check..............................................................................................7-10
VCO2 check..............................................................................................7-10
VCO2 adjust..............................................................................................7-11
HPF/LPF filter alignment ...................................................................................7-12
HPF filter...................................................................................................7-12
LPF filter ...................................................................................................7-13
45 MHz filter alignment (08-04962) ..................................................................7-14
Alignment—method 1...............................................................................7-14
Alignment—method 2...............................................................................7-15
45 MHz filter alignment (08-05322) ..................................................................7-17
Alignment—method 1...............................................................................7-17
Alignment—method 2...............................................................................7-18
455 kHz IF and noise limiter alignment .............................................................7-19
Exciter output transformer balance.....................................................................7-20
Frequency adjustment.........................................................................................7-21
Frequency adjust USB...............................................................................7-21
Frequency adjust LSB ...............................................................................7-21
Mute adjustment .................................................................................................7-22
PA adjustments...................................................................................................7-23
Driver bias.................................................................................................7-23
PA bias ......................................................................................................7-23
Output power.............................................................................................7-24
Output power 27 MHz band (9323 only)..................................................7-25
Intermodulation.........................................................................................7-26
Receiver performance checks.............................................................................7-28