Tait TM8110 Service Manual

204 Frequency Synthesizer Fault Finding TM8100/TM8200 Service Manual
© Tait Electronics Limited June 2006
Figure 9.9 Measurement points for the VCO and related circuitry in UHF radios
+5V DEC
PIN6OF
Q5001
PIN 6 OF
Q5001
PIN3OF
Q506
PIN 3 OF
Q506
Q508 AND
R593
Q508 AND
R593
PIN6OF
Q506
PIN 6 OF
Q506
BASE OF
Q5100
BASE OF
Q5100
TX PORT
TX PORT
RX PORT
RX PORT
PIN4OF
IC5100
PIN 4 OF
IC5100
SIGNALTYPES
RF ANALOG CLOCK DIGITAL
PLL
LOOP
FILTER
AND
SUMMER
FILTERING
OF SUPPLY
FOR VCO
CIRCUITRY
FREQUENCY SYNTHESIZER
PLL FEEDBACK
LOOP VOLTAGE
RECEIVE VCO
TRANSMIT VCO
TRANSMIT
BUFFER
AMPLIFIER
AND
COUPLER
5 V SWITCH
TR SWITCH
SYN TX LO
SYN RX LO1
TRANS-
MITTER
RECEIVER
DIGITAL
BOARD
DIG SYN TR SW DIG SYN EN
INVERTER
RECEIVE
BUFFER
AMPLIFIER
AND
COUPLER
VIA TO CHECK
DIG SYN TR SW
VIA TO CHECK
DIG
SYN TR SW
R103
JUNCTION OF
C541 AND R547
JUNCTION OF
C541 AND
R547
R577
R544
+3V0 AN
L506
3V
SUPPLY
R593
R585

Tait TM8110 Specifications

General

Brand	Tait
Model	TM8110
Category	Radio
Language	English