There is another transistor that powers the board during flashing the ROM. That transistor might be leaking. I am at home currently and will not have the schematics until Monday 18 March. This transistor only powers up some of the circuits but I don't remember exactly which ones. I do remember trou...

Check TP406. It should have 7.5 approx when radio is on and a low voltage when radio is off. To test turn radio off connect to TP406 and apply power to battery connector plus and minus conn. You should read a low voltage maybe 1 or 2 volts max. Turn radio on tp406 should raise to power supply volta...

Hello. I have few GP340 and GP360 radios with labeled version R03.16.00 ( CPL 8.0) that I can not read with CPS R03.11.15 and R03.11.16. I have error message that " "Couldn't open port. Check whether Device/RIB are powered on or not, and the device to rib, and the rib to pc connection is ...

Hello. I have few GP340 and GP360 radios with labeled version R03.16.00 ( CPL 8.0) that I can not read with CPS R03.11.15 and R03.11.16. I have error message that " "Couldn't open port. Check whether Device/RIB are powered on or not, and the device to rib, and the rib to pc connection is o...

Hello. I have Gp340 that I try to repair for a long time. It seems to have two problems. It can not start and it can not be turned off. :lol: After years of good working order radio first started to drain battery and making some strange noises while turned off. Soon it could not turn on at all. afte...

Hello guys, hope you are all right. I have Motorola CM360 VHF2 radio that I can not program. I am over my neck with it for a past few days. I am using CPS for commercial series R.05.16. and RIB to COM port. I have made programming cable according to schematics found various sites. When I finally mad...