Standard Bias Table; Table 4-2. Standard Operating Bias - Dc Voltages; Table 4-3. Standard Operating Bias - Clock Sources - Motorola APX 5000 Service Manual

Troubleshooting Procedures: Standard Bias Table
4.3

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.
Name
MECH_SW F_MECH_SW
UNSW_B+ F_UNSW_B+
SW_B+ C6592
V_SAVE C6538
V_1.875 C6581
V_1.55 R6561
V_2.775D R6563
V_2.775_EXP R6562
V_2.8_RF R6564
V_5.0A R6565
V_3.3 R6566
V_3.0A R6567
V_EXT_1.8 R2302
V_SW_1.4 E6502
V_SW_3.60 C6561
V_2.23 C6573
Clock
Source
Y6501 R6578
Y6502 C6541
Y6601 C6601
U6302 TP6307 and
TP6308
U6101 R6114
U6101 R6115
Y701 R6218
(RF board)
Table 4-2. Standard Operating Bias – DC Voltages
Reference
ON/OFF Switch. Radio on when GND
Radio Battery Voltage
Radio Supply Voltage
LDO Output Present When Battery is Attached
LDO Output
LDO Output
LDO Output
LDO Output
LDO Output
LDO Output
LDO Output
LDO Output
LDO Output
Switcher Output
Switcher Output
LDO Output
Table 4-3. Standard Operating Bias – Clock Sources
Reference
MAKO 24MHz & tapped into CPLD
MAKO RTC
OMAP CPU Clock
DDR Clocks (Complementary signals)
MACE Clock
GPS RTC clock
RF Freq synth IC (Abacus) TCXO
Description
Description
Level
GND
9-6V
9-6V
2.5V
1.875V
1.55V
2775V
2.775V
2.8V
5.0V
3.3V
3.0V
1.85V
1.4V
3.6V
2.23V
Frequency
24.576MHz
32.768KHz
12MHz
96MHz
4MHz
32.768KHz
16.8MHz
4-3