Troubleshooting Flow Chart for Receiver 1-3
1.2 Troubleshooting Flow Chart for Receiver (Sheet 3 of 3)
B
With a DMM probe the
collector (PIN 1) of Q0402
Check circuitry around
Q0402 and supporting
components for opens and
shorts before replacing
With a high
impedance RF probe
measure the RF level
(155.1 MHz) @ C0461
Check for opens and
shorts on the following
components
L0407,L0410 ,L0411
VR0404, VR0405, V
R0406, and VR0409
Check circuitry around
Q0402 and supporting
components for opens and
shorts before replacing
Check for opens and
shorts on the following
components
L0401,L0405 ,L0406
VR0400, VR0401,
VR0402, and VR0403
Refer to the harmonic filter
and coupler sub section of the
transmitter trouble-shooting
chart
With a high
impedance RF probe
measure the RF level
(155.1 MHz) @ R0429
> 6.64V?
> -40.0 dBm?
> -53.0 dBm?
> -53.0 dBm?
No
No
No
Yes
Yes
Yes
No
Yes
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