May 28, 2008
6871620L01-C
4-4
Troubleshooting Procedures:
Standard Bias Table
4.4
Standard Bias Table
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 4-2. Standard Operating Bias
Signal Name
Nominal Value
Tolerance
VOCON Board Source
24.576 MHz
24.576 MHz
±1000 ppm
C1317
32.768 kHz
32.768 kHz
±400 ppm
C1303
GATED_32_kHz
32.768 kHz
±400 ppm
C1301
CKIH
16.8 MHz
C1402
X_16.8 MHz
16.8 MHz
R1418
POR
3.0 Vdc
±5%
R1121
RESET_OUT
3.0 Vdc
±5%
R1105
VSW1
3.85 Vdc
±5%
R1319
RAWB+
7.5 Vdc
6.0-9.0 Vdc
C20
V2
2.9 Vdc
±5%
C1324
BAT_7V5
7.5 Vdc
6.0-9.0 Vdc
R1309
7.5 Vdc
6.0-9.0 Vdc
C1129
SW_B+
7.5 Vdc
6.0-9.0 Vdc
C1343
VCC5
5.0 Vdc
±5%
C1319
V1.55
1.55 Vdc
±5%
C1328
Summary of Contents for ASTRO XTSTM 4000
Page 1: ...COLOR CHORDS 7 ASTRO XTSTM 4000 Portable Radio Detailed Service Manual ...
Page 2: ......
Page 16: ...May 28 2008 6871620L01 C xiv Commercial Warranty Notes ...
Page 22: ...May 28 2008 6871620L01 C 1 6 Introduction Notes ...
Page 26: ...May 28 2008 6871620L01 C 2 4 Radio Power Notes ...
Page 56: ...May 28 2008 6871620L01 C 3 30 Theory of Operation Notes ...
Page 100: ...May 28 2008 6871620L01 C 6 8 Troubleshooting Waveforms Notes ...
Page 194: ...May 28 2008 6871620L01 C B 2 Motorola Service Centers Notes ...
Page 204: ...May 28 2008 6871620L01 C Glossary 10 Glossary Notes ...
Page 209: ......