Tait T855 - Page 178

C5.2 T856/857 Fault Finding M850-00
31/09/98 Copyright TEL
5.7
5.7.1
5.7.1.1
5.7.1.2
5.7.1.3
5.7.2
5.7.3
5.7.4
5.7.5
5.7.6
5.7.7
Fault Finding Charts
Microcontroller
Basic Checks
Serial Communications
CTCSS Encode
Regulator
Synthesiser
T856 Drive Amplifier
T856 PA & Power Control
T857 Exciter Drive Amplifier
Audio Processor
5.8
5.8
5.8
5.9
5.10
5.11
5.12
5.15
5.16
5.17
5.18
5.8 To Replace The T856 PA Transistors (Q410 & Q420) 5.19
Figure Title Page
5.1
5.2
RF Diode Probe Circuit
Typical Transistor/Capacitor Spacing (Not To Scale)
5.5
5.19
Section Title Page