Standard Bias Table; Table 4-2. Standard Operating Bias - Motorola ASTRO XTSTM 4000 Detailed Service Manual

4-4
4.4

Standard Bias Table

Table 4-2 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
24.576 MHz
32.768 kHz
GATED_32_kHz
CKIH
X_16.8 MHz
POR
RESET_OUT
VSW1
RAWB+
V2
BAT_7V5
UNSW_B+
SW_B+
VCC5
V1.55
May 28, 2008

Table 4-2. Standard Operating Bias

Nominal Value Tolerance
24.576 MHz ±1000 ppm
32.768 kHz ±400 ppm
32.768 kHz ±400 ppm
16.8 MHz
16.8 MHz
3.0 Vdc
3.0 Vdc
3.85 Vdc
7.5 Vdc 6.0-9.0 Vdc
2.9 Vdc
7.5 Vdc 6.0-9.0 Vdc
7.5 Vdc 6.0-9.0 Vdc
7.5 Vdc 6.0-9.0 Vdc
5.0 Vdc
1.55 Vdc
Troubleshooting Procedures: Standard Bias Table
VOCON Board Source
±5%
±5%
±5%
±5%
±5%
±5%
C1317
C1303
C1301
C1402
R1418
R1121
R1105
R1319
C20
C1324
R1309
C1129
C1343
C1319
C1328
6871620L01-C