Technical Manual

TLA 852/FLA 872
TM1205 Issue 2 Page 5 - 15
DEVICE COLLECTOR BASE EMITTER REMARKS
TR1 3.00 3.00 1.4 Battery Disconnect Monitor
TR2 - 3.00 1.4 Backlight Driver
TR3 1.4 - - Vibrate Enable
TR4 1.4 - - Vibrate Motor Drive
C5 0.19dc 2.2 V p-p 4ms wide XL2 4.19MHz
R1/C4 3.00
R35 1.49dc 3.0V p-p CLKO 38.4kHz
IC402 pin9 1.49dc 3.0V p-p XL403 38.4kHz (Radio Board)
IC5 3.00 (pin 1) 3.00 (pin 2) 0 (pin 3) Reset
IC6 1.4 (pin 1) 3.00 (pin 2) 1.4 (pin 5) VDD Supply
Table 5.3: Decoder Board DC Levels
STEP TEST POINT REMARKS
1 R23 VDD
2 R35 38.4kHz POCSAG Clock
3 R1 4.19MHz Microprocessor Clock (every 500ms)
Table 5.4: Decoder Board Test Sequence