(Vhf/Uhf Dc Switch) - Motorola HT 1000 series Theory/Troubleshooting Manual

MAEPF-23270-O
YES
Interconnect
Flex P301,
Go to
Controller
Troubleshooting
Chart #8A
38
TROUBLESHOOTING FLOW CHART #3A

(VHF/UHF DC Switch)

YES
YES
Less than
Replace
4.8V at Q105
Q105
Pin 1?
NO
YES
5V at
Replace
U102
U102
Pin 1?
NO
YES
7.5V at
Replace
U202
U202
Pin 8?
NO
ISS. REVISION RLSE.
LETTERING SIZE:
REQUIRES: SW
O
3/31/93
YES
Less than
Replace
4.8V at Q104
Q104
Pin 1?
NO
Replace
U102
5V at
YES
U102
Pin 1?
5V at
NO
Pin 3
of U102?
NO
Voltage
at U202
Pin 8?
Check
YES
Good?
Replace U202
YES
NO
Rectify
Fault
MAEPF
No R5
Q105 Pin 2
Voltage
at Q105
Pin 3?
NO
Voltage
Replace
YES
at U103,
U103
Pin 3?
NO
Check L131,
L121 and CR109
Voltage
YES
and L122 For
at Q107,
Open Connections
Pin 2?
NO
Voltage
Check Power
NO
at Q107, Supply
Pin 3?
YES
Voltage
YES
Replace
at Q107,
Q107
Pin 4?
RLSE.
JWB
3/31/93
Voltage
YES
at Q104
Pin 3?
YES
Voltage
Replace
at U202,
U202
Pin 8?
Check Fuse,
Flex Connection
J301-1, 2, 20;
Volume Switch
NO
O
No T5
NO
NO