Ericsson R310 restarting - GSM-Forum

helel · 04-05-2020, 11:09

Hi, I have an old school R310 "shark" what restarting even without sim cards roughly every 10-20 seconds. Switches off and on periodically.

Does anybody have an idea where to start from.

I still got RS232 cable, hot air station for the basic repairs.

Thanks in advance.

Mark-Zone · 04-06-2020, 00:06

i think you should start with softwear
zulea flasher attached, you need flash file also

helel · 04-08-2020, 19:19

Thanks. So I got this faulty R310 (blue color) and 2pcs of T28 and a good working R310 (orange color).

I tried Zulea ATR 5.0; 5.2; 5.3. All T28 and the working R310 booting with no issues and I can read eprom , unlock etc. with no problem.
The faulty R310 cannot boot it recognizes sometimes as R310/T1x or sometimes R320 and gives "failed to Bootstrap" error.
I have cleaned the charging port but same fault all the time.

I reckon the next step will be a reflow.

helel · 04-10-2020, 18:23

Full reflow did not help. I removed the PA just in case still the same. I have tried to change 13MHz crystal and still the same. Anything else?

sozmen · 05-31-2020, 15:45

Dear Helel, I think this is antenna switch problem. Its really difficult to change it without damage. You should find new one but passed over 20 years.

helel · 06-29-2020, 20:48

Thanks for the help.
The solution was to change RF IC called 3004CR1C.
I got the IC from A1018 and finally stays on. Receiving and making calls, working perfect.

sozmen · 04-03-2021, 10:28

Quote:

Originally Posted by helel

Thanks for the help.
The solution was to change RF IC called 3004CR1C.
I got the IC from A1018 and finally stays on. Receiving and making calls, working perfect.

I wonder that did you see network problem on R310? Because I have more than 30 R310 but 27 of them have no network.

04-05-2020, 11:09	#1 (permalink)
helel Major Poster Join Date: Jun 2004 Posts: 49 Member: 67821 Status: Offline Thanks Meter: 5	Ericsson R310 restarting Hi, I have an old school R310 "shark" what restarting even without sim cards roughly every 10-20 seconds. Switches off and on periodically. Does anybody have an idea where to start from. I still got RS232 cable, hot air station for the basic repairs. Thanks in advance.

04-08-2020, 19:19	#3 (permalink)
helel Major Poster Join Date: Jun 2004 Posts: 49 Member: 67821 Status: Offline Thanks Meter: 5	Thanks. So I got this faulty R310 (blue color) and 2pcs of T28 and a good working R310 (orange color). I tried Zulea ATR 5.0; 5.2; 5.3. All T28 and the working R310 booting with no issues and I can read eprom , unlock etc. with no problem. The faulty R310 cannot boot it recognizes sometimes as R310/T1x or sometimes R320 and gives "failed to Bootstrap" error. I have cleaned the charging port but same fault all the time. I reckon the next step will be a reflow.

04-10-2020, 18:23	#4 (permalink)
helel Major Poster Join Date: Jun 2004 Posts: 49 Member: 67821 Status: Offline Thanks Meter: 5	Full reflow did not help. I removed the PA just in case still the same. I have tried to change 13MHz crystal and still the same. Anything else?

05-31-2020, 15:45	#5 (permalink)
sozmen Junior Member Join Date: Jan 2017 Age: 56 Posts: 5 Member: 2670946 Status: Offline Thanks Meter: 1	Dear Helel, I think this is antenna switch problem. Its really difficult to change it without damage. You should find new one but passed over 20 years.

06-29-2020, 20:48	#6 (permalink)
helel Major Poster Join Date: Jun 2004 Posts: 49 Member: 67821 Status: Offline Thanks Meter: 5	Thanks for the help. The solution was to change RF IC called 3004CR1C. I got the IC from A1018 and finally stays on. Receiving and making calls, working perfect.