How JustAnswer Works:

  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.

Ask Louie Your Own Question

Louie
Louie, Technician
Category: Printers
Satisfied Customers: 11443
Experience:  25+ yrs. experience in the field and 5+ yrs. online, down to component level.
13948492
Type Your Printers Question Here...
Louie is online now
A new question is answered every 9 seconds

I have a Canon BJC-85 portable printer. I think I may have a

Customer Question

I have a Canon BJC-85 portable printer. I think I may have blown a fuse. How do I get inside it?
Submitted: 1 month ago.
Category: Printers
Expert:  Louie replied 1 month ago.

Hi, I’m Louie. Sorry you had to wait awhile but I’ll do my best to help.

Initially, have you checked the bottom for screws?

Customer: replied 1 month ago.
There is one small screw on the bottom. I loosened it but it is not clear that it is holding the chasis.
Expert:  Louie replied 1 month ago.

There are locking tabs.

Would a diagram serve your need please?

Expert:  Louie replied 1 month ago.

Please click HERE.

Customer: replied 1 month ago.
Please. How do you unlock the tabs? Do I first remove the screw?
Expert:  Louie replied 1 month ago.

Yes, remove the screw.

A jeweler's screwdriver would be need to push the locking tabs (slightly sideways) to unlatch. It would help if another screwdriver is used to keep pried apart the top cover and bottom half thus preventing the unlocked tabs from locking back in.

Customer: replied 1 month ago.
I am not at home. I need a smaller phillips head to get that screw out. I was able to unlock the tabs on each end but the middle is being held, I guess, by that little screw.
Customer: replied 1 month ago.
Is there a fuse inside?
Expert:  Louie replied 1 month ago.

Yes there are; a fuse immediately along pin 1 of connector CNDC1 labeled as F1. There is another fuse labeled as ICP1.

Customer: replied 1 month ago.
It will have to wait until I can get a small screwdriver. Tomorrow sometime.
Expert:  Louie replied 1 month ago.

I understand; tomorrow or when able.

Customer: replied 1 month ago.
Louie -
Okay. I got the cover off but where are the fuses? Do I have to do more disassembly?
Ken
Expert:  Louie replied 1 month ago.

Hi again Ken,

Please refer to the above linked exploded diagram.

The fuses are in the circuit board marked as 3 / middle board shown in FIGURE 4 CONTROL BOARD & LOWER COVER.

Customer: replied 1 month ago.
I found the fuse F1. That is the one need the power inlet. How do you remove it? With a pair of needle nose pliers? How do you test it - with a voltmeter?
I am still looking for ICP1. What part of the circuit does that one protect?
Expert:  Louie replied 1 month ago.

To serve as common reference, please post back with clear picture of the board.

Click HERE.

Customer: replied 1 month ago.
Here are some pictures of the inside of the printer. On the one picture you can see the fuse near the power inlet.
Expert:  Louie replied 1 month ago.

Thanks.

ICP1 is the fuse for the regulator IC14.

These are not readily visible from the pictures.

Customer: replied 1 month ago.
Okay I found the two fuses. Is it possible to replace them? Is it a common part?
Customer: replied 1 month ago.
How do you test them?
Expert:  Louie replied 1 month ago.

To test, set the multi-meter to continuity / Ω function. A good fuse would read 0.0Ω out-of-circuit.

Customer: replied 1 month ago.
Here is a picture of IC14 and ICP1.
So I would have to remove the fuse to test it?
How hard are these fuses to find? F1 and ICP1?
Expert:  Louie replied 1 month ago.

Yes, preferably de-soldered.

The fuses can still be checked while still in circuit as it would still read 0.0Ω if good.

Availability; sourcing should not be that difficult.

Customer: replied 1 month ago.
Okay. I'll try that.
Expert:  Louie replied 1 month ago.

Cheers.

Expert:  Louie replied 1 month ago.

Hi again,

Do you still need help with this?