TM8100/TM8200 Service Manual
Transmitter Fault Finding (40W/50W)
281
© Tait Electronics Limited
June 2006
Figure 11.7
Measurement and test points for diagnosing faults in the biasing of the PAs and PA
driver
PIN
SWITCH
AND
LPF
REV
PWR
FWD
PWR
R336
R347
DIREC-
TIONAL
COUPLER
PA
s
BUFFER
AMPLIFIER
BUFFER
AMPLIFIER
POWER
CONTROL
DRIVER
EXCITER
BIAS
LIMITER
SHAPER
AND
LEVEL
SHIFTER
SHAPER
AND
LEVEL
SHIFTER
SHAPING
FIL
TER
FRE-
QUENCY
SYNTHE-
SIZER
CDC
TX
DR
V
BIAS
CDC
TX
FIN
BIAS1
CDC
TX
FIN
BIAS2
CDC
TX
PWR
CTL
TX
FWD
PWR
TX
REV
PWR
CODEC
AND
AUDIO
CIRCUITR
Y
SIGNA
L
TYPES
RF
ANALOG
SET
PWR
TEST
POINT
SET
PWR
TEST
POINT
DR
V
TEST
POINT
DR
V
TEST
POINT
P
IN8O
F
IC303
PIN
8
OF
IC303
P
IN9O
F
IC303
PIN
9
OF
IC303
PIN
10
OF
IC303
PIN
10
OF
IC303
P
IN5O
F
IC303
PIN
5
OF
IC303
P
IN3O
F
IC303
PIN
3
OF
IC303
FIN1
TEST
POINT
FIN1
TEST
POINT
FIN2
TEST
POINT
FIN2
TEST
POINT
PWR
TEST
POINT
PWR
TEST
POINT
PIN
14
OF
IC301
PIN
14
OF
IC301
PIN
8
O
F
IC301
PIN
8
OF
IC301
PIN
1
O
F
IC301
PIN
1
OF
IC301
GA
TES
OF
Q309,
Q310
GA
TES
OF
Q309,
Q310
GA
TE
OF
Q306
GA
TE
OF
Q306
R396
Summary of Contents for TM8235
Page 1: ...TM8100 mobiles TM8200 mobiles Service Manual MMA 00005 04 Issue 4 June 2006...
Page 10: ...10 TM8100 TM8200 Service Manual Tait Electronics Limited June 2006...
Page 62: ...62 Description TM8100 TM8200 Service Manual Tait Electronics Limited June 2006...
Page 148: ...148 Disassembly and Reassembly TM8100 TM8200 Service Manual Tait Electronics Limited June 2006...
Page 162: ...162 Servicing Procedures TM8100 TM8200 Service Manual Tait Electronics Limited June 2006...
Page 178: ...178 Interface Fault Finding TM8100 TM8200 Service Manual Tait Electronics Limited June 2006...
Page 258: ...258 Receiver Fault Finding TM8100 TM8200 Service Manual Tait Electronics Limited June 2006...
Page 446: ...446 Spare Parts TM8100 TM8200 Service Manual Tait Electronics Limited June 2006...
