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

4-12
Error Code 09/10
Error Code 09/90
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.

Table 4-6. ASTRO Spectra Plus Standard Operating Bias

Signal Name
SINE32K
CKIH
16_8MHz
POR
RESET_OUT
VCC1.8
VCC3.0
SW_B+
VCC5
July 1, 2002
Troubleshooting Procedures: ASTRO Spectra Plus Procedures
Cycle power to the radio. If this fails then follow instructions as per troubleshooting
chart C.32
Cycle power to the radio. If this fails then follow instructions as per troubleshooting
chart C.32
Nominal
Tolerance
Value
32.768 kHz +/- 400 ppm
16.8 MHz
16.8 MHz
3.0 V +/- 5%
3.0 V +/- 5%
1.80 Vdc +/- 5%
3.0 Vdc +/- 5%
13.8 Vdc 11.0-16.6 Vdc
5.0 V +/- 10%
Probe Point
R428
C326
TP401
J501-29
J501
R419
R420
J501-35
J501-34
68P81076C25-C