Table 4-19. Standard Operating Bias: Vip Lines (Dash Configuration); Table 4-20. Standard Operating Bias: Vip Lines (Standard Remote Configuration) - Motorola ASTRO Digital XTL 5000 Detailed Service Manual

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Table 4-19. Standard Operating Bias: VIP Lines (Dash Configuration)

Nominal Value
NA
NA
NA
NA
SW_B+ level
0.3 V to 0.5 V
SW_B+ level
0.3 V to 0.5 V
Note: The voltage levels on the microprocessor side are at 2.85 V levels. The microprocessor is
not designed to drive the relay, but instead, is intended to drive the transistors inside the control
head or on the interconnect board. Be careful when changing jumpers.
Note: The impedance of the relay is why the SW_B+ does not damage the VIP line. Never connect
SW_B+ directly to a VIP line.

Table 4-20. Standard Operating Bias: VIP Lines (Standard Remote Configuration)

Nominal Value
5 V
0 V
5 V
0 V
SW_B+ level
0.3 V to 0.5 V
SW_B+ level
0.3 V to 0.5 V
Note: VIP_IN programmed by CPS. Requires custom pin-out to gain access.
May 25, 2005
Signal Name
VIP_OUT_1_5v
VIP_OUT_2_5v
VIP_IN_1_5v
VIP_IN_2_5v
VIP_OUT_1_12v
VIP_OUT_2_12v
Signal Name
VIP_OUT_1_5v
VIP_OUT_2_5v
VIP_IN_1_5v
VIP_IN_2_5v
VIP_OUT_1_12v
VIP_OUT_2_12v
Troubleshooting Procedures: Standard Bias Tables
Range/State
Not accessible
Not accessible
Not accessible
Not accessible
Deactivate = relay
closed
Activate = relay open
Deactivate = relay
closed
Activate = relay open
Range/State
Access only by custom
pin-out
Access only by custom
pin-out
Idle = deactivate = 5 V
bias
Activate = ground
Idle = deactivate = 5 V
bias
Activate = ground
Deactivate = relay
closed
Activate = relay open
Deactivate = relay
closed
Activate = relay open
Probe Locations
J0401-13
J0401-14
J0401-15
J0401-16
J0401-11, J2-18
J0401-12, J2-19
Probe Locations
J0401-13
J0401-14
J0401-15
J0401-16
J0401-11, J2-18
J0401-12, J2-19
6881096C74-B