Tait TP9100 - Page 225

TP9100 Service Manual Transmitter Fault Finding 225
© Tait Electronics Limited May 2005
Figure 10.4 Measurement and test points for diagnosing faults concerning the transmitter
RF power
RF
Connector
Receiver
LPF
PA
Power Control
PIN
Switch
Driver Exciter
Shaper
and Level
Shifter
Crowbar
Shaping
Filter
TX RX RF
Transmitter
OR Gate
TX INH
+5V TX +7V5 LINK DIG TX INH SYN LOCK SYN TX LO
Power
Supply
Digital
Frequency
Synthesizer
CDC TXFIN RXAGC CDC TXPWR RXFE Thermal Coupling
Codec
and
Audio
Signal Types:
RF analog clock digital asynchronous serial data synchronous serial data
Interfaces
AGND
Shaper
and Level
Shifter
Buffer
Current
Sensing
PA
Difference
Amplifier
Pre-
Driver
+7V5 BATT
Lead to
test set
Lead to
test set
50 lead
to test set
W
50 lead
to test set
W
VGATE
TX INHIBIT