PM1500 no modulation or PL encode

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arlojanis
Posts: 1049
Joined: Mon Jan 28, 2002 4:00 pm

PM1500 no modulation or PL encode

Post by arlojanis »

I have a VHF PM1500 P25 that worked normal one day and had no mic modulation or PL encode the next day. Programming and alignment look OK.
Anyone know a fix? If I sent to depot, do I need to send the control head too?
"The world runs on radio."
JohnDo
Posts: 77
Joined: Sun Sep 09, 2001 4:00 pm

Re: PM1500 no modulation or PL encode

Post by JohnDo »

I have repaired a XTL2500 with this same issue

You have to inject a tone into the mic port and trace the audio path with a scope to identify the faulty component, In my case it was a faulty mux

DSM describes a procedure for this
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