Hi Guys,
I am in the process of trying to repair the OEM radio of our Mazda Axela 2006 (Axela is the Japanese name of the 3).
I have been quoted 450NZD (around 270USD) to repair the 3 issues so I want to fix the ones I can.
So the radio only gives sound on the passenger speaker out of the 4 speakersin the car (non BOSE)
Also the CD player load and eject but doesn't read CD.
Another thing is because it is Japan import the radio station band is set for Japan and would like to convert it to Europe if possible.
-for the speakers having no sound I am convince that the amp of the HU is the problem as I checked 2 non working speakers and one of them didn't any voltage at the terminal and the other I checked the driver continuity/impedance and it was fine.
I don't know much about electronics but I think that the amplification is done via transistors.
I checked the board and I found 3 transistors
Picture of the radio
Here is a view of the board
The 3 transistors are:
-2 x KA1046Y712
-1 x KC2026Y710
Replacing the transistors is something I can tackle but is it likely to be the problem?
Where can I find replacement parts? What equivalent transistors can I use if I cant find the same part?
-2nd issue is the CD player. I think that the lens is faulty but cant find a replacement part. Can anyone help on where to find a spare part?
-Last is the tuner and I found some interesting information here: A guide to hacking Japanese car radios
First I did locate the resistor to set to the right area
That was easy to identify the hardest part will be to desolder and solder the jumper as it is quite small.
Next is the tuner that needs to be tune for the right band and I believe this is done on the tuner board via 2 potentiometers I think on the board itself.
Probably one potentiometer for FM and other one for AM
I don't know how to adjust these 2 so if someone can help that will be great!
The tuner is the least important as I can get around by using a band expander to get the correct station although it won't display the right frequency on the radio.
If I could fix the amp and the CD that would be awesome so any help is welcolme.
Thanks guys.
I am in the process of trying to repair the OEM radio of our Mazda Axela 2006 (Axela is the Japanese name of the 3).
I have been quoted 450NZD (around 270USD) to repair the 3 issues so I want to fix the ones I can.
So the radio only gives sound on the passenger speaker out of the 4 speakersin the car (non BOSE)
Also the CD player load and eject but doesn't read CD.
Another thing is because it is Japan import the radio station band is set for Japan and would like to convert it to Europe if possible.
-for the speakers having no sound I am convince that the amp of the HU is the problem as I checked 2 non working speakers and one of them didn't any voltage at the terminal and the other I checked the driver continuity/impedance and it was fine.
I don't know much about electronics but I think that the amplification is done via transistors.
I checked the board and I found 3 transistors
Picture of the radio
Here is a view of the board
The 3 transistors are:
-2 x KA1046Y712
-1 x KC2026Y710
Replacing the transistors is something I can tackle but is it likely to be the problem?
Where can I find replacement parts? What equivalent transistors can I use if I cant find the same part?
-2nd issue is the CD player. I think that the lens is faulty but cant find a replacement part. Can anyone help on where to find a spare part?
-Last is the tuner and I found some interesting information here: A guide to hacking Japanese car radios
First I did locate the resistor to set to the right area
That was easy to identify the hardest part will be to desolder and solder the jumper as it is quite small.
Next is the tuner that needs to be tune for the right band and I believe this is done on the tuner board via 2 potentiometers I think on the board itself.
Probably one potentiometer for FM and other one for AM
I don't know how to adjust these 2 so if someone can help that will be great!
The tuner is the least important as I can get around by using a band expander to get the correct station although it won't display the right frequency on the radio.
If I could fix the amp and the CD that would be awesome so any help is welcolme.
Thanks guys.
The 'potentometers' on the tuner are inductors and if you turn them, even slightly, you may not be able to tune in any stations.
The tuner may be programmed to have a specific tuning range. Making the range change may require replacing an IC.
Why do you believe that the transistors are blown?
What problem do you believe that they are causing?
The Audio IC is likely the large one near the speaker terminals.
The CD laser isn't generally a drop in replacement. When I did Pioneer repairs, there were quite a few adjustments that had to be made. That was a long time ago but I don't think it's a drop-in. Some pickups even came in defective because their nylon supports inside the pickup has sagged and the coils could not compensate.
The tuner may be programmed to have a specific tuning range. Making the range change may require replacing an IC.
Why do you believe that the transistors are blown?
What problem do you believe that they are causing?
The Audio IC is likely the large one near the speaker terminals.
The CD laser isn't generally a drop in replacement. When I did Pioneer repairs, there were quite a few adjustments that had to be made. That was a long time ago but I don't think it's a drop-in. Some pickups even came in defective because their nylon supports inside the pickup has sagged and the coils could not compensate.
Thanks for the reply Perry.
Ok sounds like I better stay away from the tuner for now and just buy a band expander for cheap.
Regarding the transistors I'm just guessing... I don't know how to troubleshot electronics components.
Can you point which component would be the Audio IC? Do you think it's more likely to be the issue?
I may have found a replacement CD lens just waiting for confirmation from the seller.
Thanks for your help.
Ok sounds like I better stay away from the tuner for now and just buy a band expander for cheap.
Regarding the transistors I'm just guessing... I don't know how to troubleshot electronics components.
Can you point which component would be the Audio IC? Do you think it's more likely to be the issue?
I may have found a replacement CD lens just waiting for confirmation from the seller.
Thanks for your help.
If you cannot read the numbers on the IC, do NOT try to pull it away from the clamp. It's likely to destroy the solder pads. IT's safer to remove the clamp.
If you can find the IC and believe it's defective, Reinstall the clamp. Then, using a razor knife, repeatedly cut/score the leads at the body of the IC until it falls off. Then remove the leads one at a time.
The laser pickup needs to be brand new in a sealed package. If it's not, dust may have gotten under the lens (where it can't be cleaned) and make the pickup useless.
Again. these were rarely drop-in replacements when I was working on head units. It could work but isn't likely to work.
If you can find the IC and believe it's defective, Reinstall the clamp. Then, using a razor knife, repeatedly cut/score the leads at the body of the IC until it falls off. Then remove the leads one at a time.
The laser pickup needs to be brand new in a sealed package. If it's not, dust may have gotten under the lens (where it can't be cleaned) and make the pickup useless.
Again. these were rarely drop-in replacements when I was working on head units. It could work but isn't likely to work.
Attachments
Audio Chip seems to be TA8263BH but I will replace the transistors first as it is easier. Manage to find the transistors and new lens on ebay. Will order replace them and hope for the best!
I tried to find a NZ used radio but it turns out to be harder as the only ones i found are from imported japanese car because of course people change them.
Also parts only will be cheaper and I'll be sure that it will work while buying used you can't really test before buying or you have to trust the seller.
I tried to find a NZ used radio but it turns out to be harder as the only ones i found are from imported japanese car because of course people change them.
Also parts only will be cheaper and I'll be sure that it will work while buying used you can't really test before buying or you have to trust the seller.
Hm yes the joys of NZ taking in the planets clunkers.
Does NZ and AU use the same frequency banding ?
If so there could be some in AU.
Another option is to use a dash kit.
Then your free to use whatever head unit you want.
Those three transistors won't fix your problem.
It will more than likely be the amp ic (TA8263BH)
Which suggests a possible short in that channels speaker or wiring.
It may be an intermittent short that you should try to find before it chews up another amp ic.
Does NZ and AU use the same frequency banding ?
If so there could be some in AU.
Another option is to use a dash kit.
Then your free to use whatever head unit you want.
Those three transistors won't fix your problem.
It will more than likely be the amp ic (TA8263BH)
Which suggests a possible short in that channels speaker or wiring.
It may be an intermittent short that you should try to find before it chews up another amp ic.
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I've looked into dash kits but the total price would be around 250/300NZD for dash kit + harness + HU which I don't want to spend
Also getting a replacement from AU is not easy as you need to find someone willing to send it and if they do the shipping is quite expensive at around 50/60NZD and a used HU between 100 to 150NZD.
So more budget friendly is fixing this one at least the amp. CD is not essential and the band i can get a band expander for 10NZD.
Also getting a replacement from AU is not easy as you need to find someone willing to send it and if they do the shipping is quite expensive at around 50/60NZD and a used HU between 100 to 150NZD.
So more budget friendly is fixing this one at least the amp. CD is not essential and the band i can get a band expander for 10NZD.