| |
|
3.4.5 Crystal Calibrator.............................................................................. 3.5 Vox and Antivox Circuits..................................................................... Section 4 Service Instruction................................................................... 4.1 General.............................................................................................. 4 2 Transmitter Signal Tracing.................................................................... 4.3 Reciver Signal Tracing......................................................................... 4.4 Voltage and Resistance Measurements................................................. 4.5 Field Alignment Procedures.................................................................. 4.5.1 Field Alignment................................................................................ 4.5.2 Test Equipment Required.................................................................. 4.5.3 RF ciruits Peaking............................................................................ 4.5.4 VFO Sideband Frequency Shift Adjustment........................................ 4 .5.5 Carrier Balance (Null) Adjustment.................................................... 4.5.6 ALC Zero Adjustment...................................................................... 4 .5.7 First Mixer Balance Adjustment....................................................... 4.5.8 S-Meter Zero Adjustment.................................................................. 4.5.9 Crystal Calibrator Adjustment............................................................ 4.5.10 VFO End-Point Adjustment.............................................................. 4.5.11 VFO Dial Centering........................................................................ 4.5.12 VFO Overtravel.............................................................................. 4.6 Laboratory Alignment Procedures......................................................... 4.6.1 Laboratory Alignment........................................................................ 4.6.2 Test Equipment Required................................................................... 4 .6.3Transmitting 455-kHz IF Alignment.................................................... 4.6.4 Bandpass IF Alignment..................................................................... 4 .6.5 RF Circuits Alignment..................................................................... 4.6.6 Crystal Oscillator Alignment............................................................. 4 .6.7 VFO Sideband Frequency Shift Adjustment.................................... 4.6.8 Carrier Balance (Null) Adjustment................................................... 4 .6.9 ALC Zero Adjustment................................................................... 4.6.10 First Mixer Balance Adjustment..................................................... 4.6.11 VFO Dial Calibration.................................................................... 4.6.12 PA Neutralizing............................................................................. 4.6.13 Driver Neutralizing........................................................................ 4.6. 14 Feedback Neutralizing.................................................................. 4.6.15 PA Loading Trimmer Adjustment................................................... 4.6. 16 Receiving 455-kHz IF Alignment.................................................. 4.6.17 Receiver RF Gain and S-Meter Zero Adjustment............................ 4.7 Test Select Components...................................................................... 4.7.1 Capacitor C10................................................................................. 4.7.2 Resistor R140................................................................................. 4.7.3 Resistor R162................................................................................ |
Page 3-5 3-5 4-1 4-1 4-1 4-2 4-3 4-6 4-6 4-6 4-6 4-7 4-7 4-7 4-7 4-7 4-7 4-7 4-8 4-8 4-8 4-8 4-8 4-9 4-9 4-9 4-10 4-10 4-10 4-10 4-10 4-10 4-10 4-11 4-11 4-11 4-12 4-12 4-12 4-12 4-13 4-13 |