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Analogic RF amplifier fault error code 2-5-5

Tags: MRI, ANALOGIC

(7)

Mohamed Hasan

Analogic RF amplifier fault error code 2-5-5

June 09, 2023 10:15

I have a fault code on the analogic RF amplifier model AN8111
2-5-5 any help please?

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Gabriel Sarmiento

re: Analogic RF amplifier fault error code 2-5-5

June 09, 2023 05:52

Hi Mohamed. Hope you are doing well.
This is Eng. Gabriel at MIT Labs in Miami FL. USA.
The errors 2-4-4 and 2-5-5 are related to the enable signal.
Check board PS & DC 10-42894-01 TP 06 (Enable) reference to TP 07 ground. The ENEBLE signal is 5 volts TTL.
Do not hesitate to contact me.
Sincerely, G Sarmiento.

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Mohamed Hasan

re: re: Analogic RF amplifier fault error code 2-5-5

June 12, 2023 11:09

Hi G Sarmiento
Thanks for your attention.
I measured the enable signal and it is 0V ?? ( The measurements where done after detaching the RF Amp from all connections. )

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(7)

Mohamed Hasan

re: re: Analogic RF amplifier fault error code 2-5-5

June 12, 2023 11:08

Hi G Sarmiento
I found that error 5-5 is Dev2 fault
What is Dev2 for ?

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Gabriel Sarmiento

re: re: re: Analogic RF amplifier fault error code 2-5-5

June 13, 2023 10:25

Mohamed, hope you are doing well.
Check board PS & DC 10-42894-01 TP 12 (HV) reference to TP 07 ground. The HV signal is 160 volts DC.
If the voltage on TP 12 is gone check U9 on board PS & DC 10-42894-01.
U9 is a (Phase Shift Resonant Controller) that is part of the circuit that controls the power MOSFET's.
Regards,

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Mohamed Hasan

re: re: re: re: Analogic RF amplifier fault error code 2-5-5

June 14, 2023 12:50

Hi Gabriel
TP12 (HV) is ok it reads 160 V

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Gabriel Sarmiento

re: re: re: re: re: Analogic RF amplifier fault error code 2-5-5

June 15, 2023 11:57

Hi Mohamed, can you check TP16 the voltage is 7.9 V DC
Signal name HV SCA ED
If voltage on TP16 is over 8 volts the control board puts ENABLE signal or TP6 in logic Lo

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Antonio Lopez

re: Analogic RF amplifier fault error code 2-5-5

June 12, 2023 11:03

Hello: It looks like a problem on PS & DC board (10-42894-01), Check TP 06. (5 V is ok). I hope this can help.

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Mohamed Hasan

re: re: Analogic RF amplifier fault error code 2-5-5

June 12, 2023 06:14

Hi Antonio
I tested tp6 no 5

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(7)

Mohamed Hasan

re: Analogic RF amplifier fault error code 2-5-5

June 13, 2023 10:25

Hi
Test point TP10= 5V
Test point TP6 =0V (ENABLE)
This ENABLE point is it a logic signal or power point 5V supply ?

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Antonio Lopez

re: re: Analogic RF amplifier fault error code 2-5-5

June 13, 2023 02:52

Enable signal.

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Gabriel Sarmiento

re: re: Analogic RF amplifier fault error code 2-5-5

June 14, 2023 12:49

Hi Mohamed
ENABLE TP6 is a logic signal, it must be 5 volts.
If the ENABLE is not in logic H there is no power for the RF Amplifier.
The ENABLE activates +13V signal on TP3 that controls U9.
Yo need to track the root of the problem on the ENABLE signal.
Regards,

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Mohamed Hasan

re: Analogic RF amplifier fault error code 2-5-5

June 15, 2023 11:57

Hi
Thanks for all of you
At last I solved the problem and now every thing is working good...
I found the fuse F3 in the amp. Box blown

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Gabriel Sarmiento

re: re: Analogic RF amplifier fault error code 2-5-5

June 16, 2023 10:14

Hi Mohamed.
I'm glad that you found the problem (F3) blown.

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