Standard Bias Table; Table 4-2. Standard Operating Bias - Dc Voltages; Table 4-3. Standard Operating Bias - Clock Sources - Motorola APX 7000 Detailed 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+ R6505_6
V_SAVE C6538_6
VCC_1.875 C4001_4
VCC_1.55 R6561_6
VCC_2.775D R4011_4
VCC_2.775 R6563_6
VCC_2.8 R6564_6
VCC_5.0A R6565_6
VCC_3.3 R6566_6
VCC_3.0A R6567_6
VCC_SW_1.8 R2302_2
VCC_SW_1.4 E6502_6
VCC_SW_3.6 C6561_6
Clock
Source
Y6501 R6578, R6572
Y6502 C6541
Y6601 C6601
U6302 TP6307 and
TP6308
U6101 R6113
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
Switcher Output
Switcher Output
Switcher 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
2.775V
2.775V
2.8V
5.0V
3.3V
3.0V
1.875V
1.4V
3.6V
Frequency
24.576MHz
32.768KHz
12MHz
96MHz
4MHz
32.768KHz
16.8MHz
4-3