Standard Bias Table; Table 4-2. Standard Operating Bias - Dc Voltages; Table 4-3. Standard Operating Bias - Clock Sources - Motorola APX 1000 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
IGN_X*
UNSW_B+
SW_B+
V_SAVE
V_1.875
V_1.55
V_2.775D
V_2.775_EXP
V_2.8_RF
V_5.0A
V_3.3
V_3.0A
V_EXT_1.85
V_SW_1.4
V_SW_3.60
V_2.23
ON_OFF_SWITCH
Note:
* = Not applicable to APX 2000/ APX 4000 (Two Knobs).
** = Applicable to APX 2000/ APX 4000 (Two Knobs) only.
Clock
Source
Y6501 R6533
Y6502 C6541
Y6601 C6601
U6302 TP6307 and
TP6308
U6101 R6113
Table 4-2. Standard Operating Bias – DC Voltages
Reference
Mako_IGN_X ON/OFF Switch. Radio on when GND
F_UNSW_B+ Radio Battery Voltage
C6593 Radio Supply Voltage
C6538 LDO Output Present When Battery is Attached
C6581 LDO Output
R6561 LDO Output
R6563 LDO Output
R6562 LDO Output
R6564 LDO Output
R6565 LDO Output
R6566 LDO Output
R6567 LDO Output
R6570 LDO Output
C6570 Switcher Output
C6561 Switcher Output
C6573 LDO Output
MECH_SW ON/OFF Switch. Radio on when GND
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
Description
Description
Level
GND
6–9V
6–9V
2.5V
1.875V
1.55V
2.775V
2.775V
2.8V
5.0V
3.3V
3.0V
1.85V
1.4V
3.6V
2.23V
GND
Frequency
24.576MHz
32.768KHz
12MHz
96MHz
4MHz
4-3