Troubleshooting Chart 1-5, Rx Audio - Motorola MCS 2000 Service Instructions Manual

Troubleshooting Troubleshooting Chart 1-5, RX Audio

Troubleshooting Chart 1-5, RX Audio

START
~800mVpp
on U0200-J7
Yes
~375mVpp
on U0200-J4
Yes
~68mVpp
on U0203-J9
Yes
~5.4 Vpp
on
U0203-6, 4
Yes
Check speakers
68P81083C20-D
No
GOTO Band Specific
IF Receiver Chart
No
SPI activity at
U0200-E3, F1
No
SPI activity
on pins 66, 67
of U0103
Yes
Check
R0403, R0404,
R0405
No
Check R0234,
C0240, R0239
No Check
U0203
Inj: 1kHz Tone, 3kHz deviation at the appropriate
RX frequency into the antenna connector.
Volume set to ~7.5 Vrms
Ref: RX Audio Simplified Schematic
~ = Approximately
Yes
Check
U0200
No
Check
U0103
MAEPF-25951-O
9-9
December 6, 2004