Tait TM8110 Service Manual

96 Circuit Descriptions TM8100/TM8200 Service Manual
© Tait Electronics Limited June 2006
Figure 3.15 Block diagram of the control-head board with 1-, 2- or 3-digit display
R52
C50
R53
(not implemented)
LINK
Control-
Head
Options
Connector
Control-
Head
Options
Board
(optional)
Microphone
Connector
Protection
Circuitry
Control-
Head
Connector
LCD LCD Driver
LED Lenses LEDs LED Drivers
On/Off Key
Volume
Control
Switch Pads
Key Drivers
Switch Pads
Switch Pads
Function
Keys
Channel-
Selection
Keys
Speaker
Connector
Speaker
+13V8 SW
CH ON OFF
SPK+
SPK–
DGND
CH SPI DI
CH LE
CH SPI CLK
+3V3
+13V8 SW
CH ON OFF
CH SPI DI
CH LE
CH SPI CLK
+3V3
AGND
DGND
Contact made
when key
pressed
Contact made
when key
pressed
Speaker Leads
SPK+
SPK–
+13V8 SW
MIC AUD IN P1
MIC AUD OUT
DGND
AGND
VOL WIP DC
+3V3
AGND
VOL WIP DC
Control-head
options board
attached via
connector
Concealed
Microphone
(optional)
Control-Head
Board
RST
OE
CH LE
CH SPI CLK
+3V3
+13V8 SW
DGND
Q7
D2 D3
RST
OE
CH LE
CH SPI CLK
+3V3
Light Pipes
CH SPI DO
R11
CH RXD
CH TXD
CH GPIO1
CH PTT
MIC AUD OUT
RX AUD
CH SPI DO
+3V3
CH SPI CLK
CH LE
OE
RST
DGND
D1 D2
RXD
TXD
CH GPIO1
PTT
RX AUD
MIC AUD IN
+13V8 SW
GND GND
Elastomeric Strips
MIC+
L1
C1
R50
R51
DGND
(not implemented)
Signal Types:
analog
clock
digital
asynchronous
serial data
synchronous
serial data
Contact made
when key
pressed
Soldering
Pads
MIC+
AGND

Tait TM8110 Specifications

General

Brand	Tait
Model	TM8110
Category	Radio
Language	English