Ic7000 no power on


Luc
 

Hi,
so i have a problem with my 7000 , first i had the click click error.Control of the rig an i foud a burned C. replaced this one and  now nothing is hapend isf i push the onn button.
Have any one any experiance with this problem...

Greetings


Pasquale S
 

Hi Luc, which component have found burnt ? Before fix you have to understand way component burnt. Often  on front panel there are 2 condensators which they went in fault.

 

Let check on web, you will find a lot of documentations.

 

73s Pasquale IW0HEX

 

 

Inviato da Posta per Windows 10

 

Da: Luc
Inviato: sabato 26 dicembre 2020 18:06
A: ic7000@groups.io
Oggetto: [ic7000] Ic7000 no power on

 

Hi,
so i have a problem with my 7000 , first i had the click click error.Control of the rig an i foud a burned C. replaced this one and  now nothing is hapend isf i push the onn button.
Have any one any experiance with this problem...

Greetings

 


 

When you have the click - click problem what happens is that the +8 volt regulator feeds the front panel unit with power and in the panel there is a 5 volt and a3.3 volt regulator that will burn out the resistor that feeds that 8 volt reg on the main board.
The CPU on the main board turns on the 12 volt relay and it has a few seconds to get the response from the CPU in the control head.
You have to have power the the CPU to activate the power relay.
IC 101 and IC 151 for the 5 and 3.3 volt in the control head.
If the 8 volt regulator is on line (no burned resistor)  and you  have 9 volts to the control head then check for the 5 and 3.3 volts on the board.
No voltage on the board the CPU cannot generate the data signal to the main CPU.


 

R-2011 (4.7 ohm) feeds IC2001 a TA7808F 8 volt regulator and develops the U8V power line to the connect unit and faceplate. That 4.7 ohm resistor is more or less a fuse for the line.


Peter
 

Yes ! There have a detail reference can be use as following https://www.pc5e.nl/downloads/ic7000/Mods/Dead%20Icom%20IC7000%20radio,%20click%20click%20from%20the%20relay.pdf

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J.D. Barron <jeter.d.barron@...> 於 2020年12月27日 上午5:57 寫道:

R-2011 (4.7 ohm) feeds IC2001 a TA7808F 8 volt regulator and develops the U8V power line to the connect unit and faceplate. That 4.7 ohm resistor is more or less a fuse for the line.


Luc
 

He tks for the awnser..
@Peter not that problem everything chequed...problem somwere other..
@ JD I have the vcc on the cpu board buth no reaction when i push power on button..

to all C530 burned with burned place on the motherboard also..

so correct me if i have wrong..

we have a "HV" line and a 14v line  the 14v going direct to the pa's.. the HV line deliver the "lowtension" to the pcu via the ic1251..correct tension 12 to 3.3v..this tension giving the VCC for the cpu...
now if i push the power on then the pin 135 of the cpu going "low" via the r 1010.....normaly then the pin 107 of the cpu placed the Q700 low and so the relais closed and give the the thension the needed....correct???

so solong the relais dont close there is nothing thath can turning onn???

grts