hr2510 squeals thru speaker

For discussions on CB Radio Repair and Troubleshooting, do not post modification requests here, use the Modifications forum !
Post Reply
jakedaboz
Newbie
Newbie
Posts: 3
Joined: Saturday 10th Jan 2009, 15:38
Location: Canada

hr2510 squeals thru speaker

Post by jakedaboz » Saturday 14th Mar 2009, 17:13

Radio Make and Model: President Hr2510
PCB Number:
PLL Number:
Test gear available:
Symptoms: rf meter reads full scale squeal thru speaker, lcd dim like if transmitting

What is working:

What has been tried: unplugged antenna and mic. no change, checked supply voltage

Did it suddenly happen ?: yes
Anything else that may be of help?: I checked the swr and about 2 minutes later started to hear a squeal thru the speaker, checked the rf meter was reading full scale. now when turned on it squeals if i press the ptt switch the tx indicator lights

User avatar
The Defpom
Site Admin
Site Admin
Posts: 435
Joined: Friday 20th Aug 2004, 18:06
Location: New Zealand
Contact:

Re: hr2510 squeals thru speaker

Post by The Defpom » Saturday 14th Mar 2009, 17:55

What test gear do you have available to you ?

Remove the top cover, and touch the IC that is just behind the two vertical PCBs on the main PCB, marked as IC101 (it an NJM2902N), if it feels hot when the radio is on then replace it.

jakedaboz
Newbie
Newbie
Posts: 3
Joined: Saturday 10th Jan 2009, 15:38
Location: Canada

Re: hr2510 squeals thru speaker

Post by jakedaboz » Sunday 15th Mar 2009, 10:39

humm hooked it back to the power supply, after a couple days of no power to it, and it receives fine today no squeal... has choppy/rasp modulation on transmit..

test equipment available digital and analog meters, sig gen, old scope,sig tracer

Post Reply

Return to “CB Radio Repair and Troubleshooting”