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Beginner

Clock-Signal Repair Pictures ISR4300, ASA, ISR4400

Hello!

We have many devices affected by the clock-signal issues.

Cisco does replace the units with repaired/fixed ones.

I have received some ISR4321 routers with the fix applied (pictures attached).

The Cisco provided fix is of - well - mediocre quality (loose solder joints etc..) but works.

I am an EE engineer and am able to fix other routers of my customers as well (attached a picture of one of my fixes).

Spot the difference :)

Is there anyone which has received fixed ASA5506, ASA5508 and ISR4331 routers?

Please post pictures of your fix (hi-res if possible)

I ask because I would like to fix them as well (some of my customers) and avoid configuration, license etc. migration.

I am aware that I might void Ciscos warranty by this act of evil :)

Best regards,

Bernhard

37 REPLIES
Beginner

Re: Clock-Signal Repair Pictures ISR4300, ASA, ISR4400

Nobody with a repaired ISR4331?

Beginner

Re: Clock-Signal Repair Pictures ISR4300, ASA, ISR4400

@cisco QA

 

Please check your repair process!

 

Yesterday I received a repaired RMA unit and guess what:

Loose wire (cold solder joint) on your fix which makes it - yes - inactive.

Router will breakdown within month/weeks due to clock-signal-issue.

 

Is tihs what you want to do?

Is this Cisco quality?

 

Guess not...

 

 

Beginner

Re: Clock-Signal Repair Pictures ISR4300, ASA, ISR4400

Hi Benhardt, nice hi-res pics ;-)

 

Thanks for the info, since I plan to purchase one a day off eBay (not for production purposes, of course, but for lab and training - I have to train myself on IOS XR).

 

BTW, very bad soldering on Cisco's fix, but I think that repair center are more targeted on production volume than in quality - I had a long ago an Asus mobo repaired by one of their centers, it was easy to find that they replaced an SOT23 transistor ... :-/

 

So, you added a 110R resistor as per EIA-96 marking on 0603 (?) case. Quick question though: on Cisco's fix, they removed R4 (named R4_CLK, 2R2) but you let it in place on you fix. Did you forget to remove it, or is it normal?

 

Thanks for your answer!

 

Have a nice day.

Beginner

Re: Clock-Signal Repair Pictures ISR4300, ASA, ISR4400

R4_CLK is still present on both models.

It's just the bit blurry picture which makes it hard to identify the component.

 

Beginner

Re: Clock-Signal Repair Pictures ISR4300, ASA, ISR4400

Thanks for the info. I would have bet to see a via under R4 (upper side of the picture) and rosin (resin) on the opposite side.

 

Have a nice day.

Beginner

Re: Clock-Signal Repair Pictures ISR4300, ASA, ISR4400

Has anyone received a repaired 5506 yet?

Would also be very interested how cisco fixes it.

Beginner

Re: Clock-Signal Repair Pictures ISR4300, ASA, ISR4400

Here is what all of you have been waiting for:

 

Pictures of repaired ASA5506

 

Resistor is 150 Ohms, 0604 or 0402 SMD case.

 

Attached you can find an overview (spot the fix) and two microscopic (43x magnification) pictures, one of them at an angle to better see the solder joints.

 

That fix looks reasonable, much flux residue on the bottom but quite well done.

I will resolder them anyways and put eventually some liquid soldermask to protect the fix.

 

Feedback welcome :)

 

Beginner

Re: Clock-Signal Repair Pictures ISR4300, ASA, ISR4400

Note:

That fix is one of the easiest but you need some magnification to do it well.
On a scale from 1 (hard) to 10 (easy), ASA5506 repair scores a personal 7.

ISR4321: 6
ISR4331: 5 (many screws, big board)
ASA5508 & AA5506 (actually the same board): 3 small and fragile pads

As always practice good ESD protection, care and apply thermal paste when putting all together.
Beginner

Re: Clock-Signal Repair Pictures ISR4300, ASA, ISR4400

Bernhard,

 

Is the middle resistor actually pulled? I can't tell from the photos you posted.

 

Thanks!

Paul

Beginner

Re: Clock-Signal Repair Pictures ISR4300, ASA, ISR4400

Hello Paul,

 

to which pictures are you referring to?

 

Cheers,

Bernhard

Beginner

Re: Clock-Signal Repair Pictures ISR4300, ASA, ISR4400

According to my findings, no components need to be "pulled" or removed.

All devices have only a resistor added (different values depending on model).

Beginner

Re: Clock-Signal Repair Pictures ISR4300, ASA, ISR4400

Thank you very much! Have a bricked (flashing amber) 5506 going to use for my lab. Do you think it was a 100 ohm 402 or 602 they used?


Thanks!


Paul
Beginner

Re: Clock-Signal Repair Pictures ISR4300, ASA, ISR4400

If the firewall is already broken, there is no chance to fix it.

 

The CPU is physically damaged internally and cannot be fixed.

 

Only when the firewall is still working, applying the fix will prevent the CPU to get bad.

 

Sorry, the only chance you might have is to send the unit back to Cisco for replacement.

 

Beginner

Re: Clock-Signal Repair Pictures ISR4300, ASA, ISR4400


@Bernhard Roth wrote:

If the firewall is already broken, there is no chance to fix it.

 

The CPU is physically damaged internally and cannot be fixed.

 

Only when the firewall is still working, applying the fix will prevent the CPU to get bad.

 

Sorry, the only chance you might have is to send the unit back to Cisco for replacement.

 


I had a bricked ASA 5506 that was not booting at all & had the amber status flash of death.  With out a service contract or any other way to get warranty I gave Bernhard Roth's fix a try.  It worked!  Boots now.  Not too say it will work for everyone, but it did for me.  Robbed a 150 ohm SMD resistor off a junk motherboard & soldered in as Bernhard pic's show.  agent1533, no pulling any components-spot for a R182 is empty & that is where to solder one leg of the 150 ohm resistor.  Other leg solder to R850.  THANKS BERNHARD!!

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