Astro Spectra Plus Standard Bias Table; Table 4-6. Astro Spectra Plus Standard Operating Bias - Motorola ASTRO Digital Spectra Plus Service Manual

4-12
4.2.3

ASTRO Spectra Plus Standard Bias Table

Table 4-6 outlines some standard supply voltages and system clocks which should be present under
normal operation. These should be checked as a first step to any troubleshooting procedure.
Signal Name
SINE32K
CKIH
16_8MHz
POR
RESET_OUT
VCC1.8
VCC3.0
SW_B+
VCC5
October 28, 2002

Table 4-6. ASTRO Spectra Plus Standard Operating Bias

Nominal
Value
32.768 kHz
16.8 MHz
16.8 MHz
3.0 V
3.0 V
1.80 Vdc
3.0 Vdc
13.8 Vdc
5.0 V
Troubleshooting Procedures: ASTRO Spectra Plus Procedures
Tolerance Probe Point
+/- 400 ppm R428
C326
TP401
+/- 5% J501-29
+/- 5% J501
+/- 5% R419
+/- 5% R420
11.0-16.6 Vdc J501-35
+/- 10% J501-34
6881076C25-D