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Equipment Repairs => DVD/VIDEO/Home Cinemas/Hi-Fi/Mp3/Camcorder => Topic started by: E Parton on January 20, 2010,12:19:01

Title: Hitachi Micro Hi-Fi AX-M137 - Service info needed
Post by: E Parton on January 20, 2010,12:19:01

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.
rgds
Evan

Title: Re: Hitachi Micro Hi-Fi AX-M137 - Service info needed
Post by: Turnip on January 29, 2010,12:53:57

Hi Evan,

Will try find shematic - Chris

Gather this was a Curry's special, and Hitachi deny any knowledge - sorry.

Title: Re: Hitachi Micro Hi-Fi AX-M137 - Service info needed
Post by: fix2003 on April 17, 2010,07:17:03

sorry if its a bit late
DZ106 (18v) zener