Table 4-17. Standard Operating Bias: Clock And Control Lines - Motorola ASTRO XTL 1500 Detailed Service Manual

Troubleshooting Procedures: Standard Bias Tables
Table 4-16. Standard Operating Bias: Power Lines (Continued)
Nominal Value
9.18 V
5 V
5 V
3 V
2.85 V
2.85 V
2.85 V
1.86 V
1.85 V
1.55 V
1.42 V
Note: Do not KEY UP unless the board is inside a chassis.
.

Table 4-17. Standard Operating Bias: Clock and Control Lines

Nominal Value
(See "Chapter 6
Troubleshooting
Waveforms" on
page 6-1)
Note: Use chassis as GND when measuring on an oscilloscope.
(See "Chapter 6
Troubleshooting
Waveforms" on
page 6-1)
Note: Use chassis as GND when measuring on an oscilloscope.
(See "Chapter 6
Troubleshooting
Waveforms" on
page 6-1)
6815854H01-A
Signal Name
9V
5V_ABACUS
VCC_5
VCC_3
LV_DETECT
STO
(at microprocessor)
VCC_2.85
Vpp
VCC_1.8
VCC_1.55
VAG
Signal Name
SB9600__BUS +
SB9600__BUS -
SB9600__BUSY
SB9600__RESET
USB_PWR
USB_DATA +
USB_DATA -
RS232__UARTA_TX
RS232__UARTA_RX
RS232__UARTA_CTS
Range/State
No change
No change
No change
No change
When A+ drops too far
below 9 V, this line goes
to 0 V
No change
No change
No change
1.84 to 1.87 V
No change
No change
Range/State
Idle=High (4 V to 5 V)
Idle=Low (0 V)
Idle=Low (0 V)
Idle=Low (0 V)
5.1 V
Output voltage level is
the same as BOOT TX
Input level depends on
inputting device's levels
Flow control line—not
used always
Probe Locations
U0500-5
U0505-3
J0401-23, U0507-8,
U0503-3, U0502-8,
U0501-8
U0962-5
U0504-1
TP0500
U0501-1
TP0400
U0507-1
U0502-1
U0206-1, U0201-3
Probe Locations
J0402-3, J2-2
J0402-5, J2-3
J0402-4, J2-9
J0402-6, J2-8
J0402-12, J2-12
J0402-11, J2-7
J402-13, J2-6
TP0407, J2-7
TP0408, J2-9
TP0409, J2-8
June 15, 2005
4-29