For discussions on CB Radio Repair and Troubleshooting, do not post modification requests here, use the Modifications forum !
- Heavy User
- Posts: 228
- Joined: Monday 12th Nov 2007, 0:47
- Location: canada
Radio Make and Model: uniden pc 68xl
PCB Number: PA-339AB1/4
PLL Number: NPC 992D SM5126BP
Test gear available: BK 1040, BK 2040, watt meter, Multimeter
Symptoms: radio has great modulation on BK 1040, but zero watts
What is working: the only thing that i can find that is not functioning is the tx power
What has been tried: replaced driver, final, cb/pa switch... replaced caps , c91, c118, audio chip, Q16.... i had changed r43 to a 4.7ohm as part of a mod...along with adding caps to c42, 46...have since removed the added caps..
Did it suddenly happen ?: yes
thanks in advance
- Technical Helper
- Posts: 331
- Joined: Sunday 21st Jan 2007, 16:35
- Location: mississippi
dose the tx light come on when you key the ptt,,if not ck r60 for o/c
also ck pin 6 of ic 2 for 6 volts,if not present change ic 3,it is bad.
- Posts: 7
- Joined: Friday 25th Sep 2009, 16:08
- First Name: kc
- Location: Fort Collins, Co