Hitachi Ax M137 Manual Lawn
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Genuine HITACHI Remote Control For AX-M81 AX-M137 Original For Parts. Hi friends I desperately need a schematic or a copy of the service manual for this hi-fi /dab system. Apparently the faulot is well knownand there is even someone advertising on ebay to fix them. The fault is a design flaw which leads to psu failure. Hitachi don't want to know.as the system wasn't intended for sale in the UK. Currys did however.(grey market) import these units and retail them fom Christmas 2007 onwards. The failure rate at that time was reported to be substancial often units failed within hours of getting them home and powering up.but of course.these units are now well out of guarantee.but the psu still fails.Can anyone please help me with a copy of the circuit diagram.or anyone familliar with the mod/repair.a list of components that would require changingg.
So far I've found the Power FET BUK7535 s/c and its ascociated fuse (1 amp) o/c. DZ106 is also s/c.but I cannot read a value on it.hence the need for a schematic. I had the same problem a couple of weeks ago, except now my system fails to turn on at all, the indicator light on the front doesn't even glow red. Did you ever solve your problem?
I am going to try and replace the 3 capacitors on the board 1204D2-11 that you replaced - mine look like they have been leaking, they are not bulging in any way though. The board appears to have got pretty hot in that area looking at it from the underside. So I will update you when I have replaced them.
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Incidentally what I did about a year ago was I replaced the volume control with one that had fine increments, it did add a better feel and more accurate volume control and worked well. I hope this has not been the cause. Sampoorna Ramayanam Telugu Movie Mp3 Songs Free Download. Please be advised I am a complete novice! So fingers crossed.
I have nothing to loose! Hi Josmit, Funny you should ask. I finally have given up with it, as there is zero information about repairs on the web. Believe me, i've searched everywhere. Upon contact, even Hitachi themselves washed their hands of it and didn't want to know!
Every avenue I come to ends up saying 'your better off binning it'. I even went and swapped out a bunch of Zener diodes, which I thought were suspect - no joy. I only took it to the recycling centre just yesterday, which is so frustrating as otherwise it was more or less fully functional (just needed a new DVD lens pickup - easy fix). To add to that, a while ago, i believe there was a seller on fleabay who offered a fix for it (and the AX-M137, which seems to succumb to the same fate) for about £20. When i enquired, it seems the seller is no longer registered anymore. I've just accepted it wasn't meant to be and got shot of it (i've kept the speakers though as they seem pretty decent for a mini system.).
It was only for the bedroom to replace our even more ancient mini system, so no great loss. Good luck in your pursuit!
Hello People I Came across your discussion today while searching on google for an answer to the very same problem! My Hitachi AX-M140 also started to hum - I thought it seemed to be the volume control as when I pushed it quite hard the hum would disappear. I opened up the amp and I can see it is quite brown around the 3 capacitors you talk about josmit on the board 1204D2-11. So please keep me updated in the meantime I'll try down at Maplins to see if I can get them there, I think I may also get the volume control as that seemed to be where the problem is - Have you tried to push it inwards with the volume down? Because the hum does disappear on my system, but then comes back again. I will update in a couple of days once I have replaced those parts. I replaced the Capacitors (2 x 100uF & 1 x 220uF) No change!
(8472 I hope for your sake that was a typo when you said you changed 1 x 100uF & 2 x 220uF as it is actually what I have stated:face palm So now like josmit the whole thing does not turn on it may be with all the prodding etc. BUT what I have found in the DVD component is a blown resistor No. R2054 on board 1204D2-20.PCB (See the images indicated by A. (I believe B, the Capacitor the brown stuff is just glue) My BIG problem is I have no idea what type or part number the Resistor is or was! This is where I am stuck this is a very obvious problem and I am sure will work when repaired!
Any suggestions out there? Could you check yours josmit? 8472 Run to the recycling centre and get yours back! I am sure we will all win together here! Hello Fabricator That is exactly the information I am after The voltage etc of the resistor marked A to enable me to replace it with the correct one. User Josmit is also after the same resistor.
I am going to trust a university student with my board 1204D2-20.PCB he says he can try test other things on there to try identify the resistor. All hope seems to be fading away so he seems like my last effort to solve this problem. As soon as I find out what the resistor is I will post my findings on here.
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Click to expand.Hi Ianspeed Yes I do watch this thread from time to time. What you have here - the Service Manual is interesting as I can see the board 1204D2-20.PCB that is in the DVD section of the Hifi which is where we both have the fault. Did you compare your board to my image?
The resistor that has blown marked A has blown on Josmit's machine as well as mine. I will print of the whole PDF you have kindly provided and have a good read to see if I can find out the voltage etc of the resistor a quick look indicates R2054 only has 47 marked on the board. But I will study the rest of the document and will report back on my findings. I had almost given up all hope. I hope I can help regarding the Hitachi AX-M140 problems. From experience the humming noise indicates that the 44 pin SMT IC on the printed side of board 1204D2-20.PCB is about to go short circuit (5v supply to ground).
Before this the displays will begin to misbehave with the DVD player perhaps being inoperative or/and several other functions including the unit being permanently powered with the red standby lamp not working. As a result of the said 44 pin SMT IC finally going short circuit the 5v rail supplying it will fail with a smell of cooking! Resistor R2054 will have cooked (4.7ohms 0.25watts) this feeds the 3pin regulator IC2004 with its output feeding L2002 (10uH 5%) which in turn feeds the 5volt supply to the 44 pin SMT IC. With the supply removed the IC can be checked on a multimeter and will likely read between 7ohms and 10ohms.
Obviously it is pointless to re-connect both sides of L2002 until the 44pin IC is replaced but with it removed it is possible to check the 5v rail has been re-instated (I am assuming that the unit will default to standby when the mains supply is connected). The said IC is a Samsung SP9228AZZ-QZ88, this device controls just about every function for all the units including standby! I am presently attempting to obtain the SP9228AZZ-QZ88 and furthermore to establish that it has been programmed to work with the AX-M140. It is also well to check X2002 which is a tiny clock crystal for the SP9228AZZ-QZ88, this is on the on the component side of the board above. The two connecting leads are very fragile, frequency is 32.768 KHz. Thanks for the reply I did contact them but it would be to expensive for me to have the whole stereo sent there i offered to send the 1204d2-20 pcb to them but they wanted the whole stereo, I have taken the stereo to a local repair shop where they was carrying a repair on but the engineer who stated the job left the company since then shop closed down so iv had a half job done.
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I have opened the stereo on borrowed the pcb from a mates stereo and it works fine so I am looking to send the pcb to someone who knows a little about them and who haves the same stereo? I will pay them for the time.
Hitachi Ax M137 Manual Lawn Rating: 4,7/5 3626votes. Hi friends I desperately need a schematic or a copy of the service manual for this hi-fi /dab system. Apparently the faulot is well knownand there is even someone advertising on ebay to fix them. Hitachi digger ax35.
Hitachi 450 excavator load chart, hitachi excavator dealers canada, hitachi cabs ireland, hitachi ultravision hd digital rear projection tv 53udx10b, hitachi miter saw setup. The fault is a design flaw which leads to psu failure.
Hitachi don't want to know.as the system wasn't intended for sale in the UK. Currys did however.(grey market) import these units and retail them fom Christmas 2007 onwards. The failure rate at that time was reported to be substancial often units failed within hours of getting them home and powering up.but of course. These units are now well out of guarantee.but the psu still fails.Can anyone please help me with a copy of the circuit diagram.or anyone familliar with the mod/repair.a list of components that would require changingg. So far I've found the Power FET BUK7535 s/c and its ascociated fuse (1 amp) o/c. DZ106 is also s/c.but I cannot read a value on it.hence the need for a schematic.