Multitone RPR 551IS - Main Board and Power Systems

GATE
ARRAY
µP
EEPROM
LOW
BATTERY
DETECTOR
IC7
CLOCK
XL4
+3V
CLOCK
XL3
IF FILTER/
AMPLIFIER
FL1, FL2, IC1
AMP AND
DETECTOR
IC1
AGC
NETWORK
AUDIO
AMP
TR1, TR2, TR10
DATA
FILTER
TR11, TR12,
TR31, TR29
INCOMING IF FROM FRONT
END BOARD
BEEP DRIVER
TR24, TR20
‘ON’ ICON
DRIVER
TR18
LED DRIVER
TR17
LCD DRIVER
AND DISPLAY
VIBRATE
DRIVER
TR18, TR8
+3V
BATT+
LOUD
SPEAKER
+1.5V (BATT+)
+3V
BEC SIGNAL
+5V
DATA AMP
IC1
IC2
IC3
+3V
S2
OFF SWITCH
IC4
ABSENCE
INTERFACE
CONTACTS
GATE
ARRAY
µP
EEPROM
LOW
BATTERY
DETECTOR
IC7
CLOCK
XL4
+3V
CLOCK
XL3
IF FILTER/
AMPLIFIER
FL1, FL2, IC1
AMP AND
DETECTOR
IC1
AGC
NETWORK
AUDIO
AMP
TR1, TR2, TR10
DATA
FILTER
TR11, TR12,
TR31, TR29
INCOMING IF FROM FRONT
END BOARD
BEEP DRIVER
TR24, TR20
‘ON’ ICON
DRIVER
TR18
LED DRIVER
TR17
LCD DRIVER
AND DISPLAY
VIBRATE
DRIVER
TR18, TR8
+3V
BATT+
LOUD
SPEAKER
+1.5V (BATT+)
+3V
BEC SIGNAL
+5V
DATA AMP
IC1
IC2
IC3
+3V
S2
OFF SWITCH
IC4
ABSENCE
INTERFACE
PSG/10442/1
RPR 550IS Series
Page 3 - 10 TM1188 Issue 1
Figure 7: Main Board Functional Block Diagram
RPR 550IS MAIN BOARD
27. The main board, shown in block diagram form in Figure 7, contains the following:
a) IF, Detector and Speech circuits
b) Decoding circuits
c) LCD and Alert generation drive circuits
d) Function control switches
e) Power supply circuits