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Service Manual that I received was very helpful to me. Thank you.
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The manual is well organized and is easy to read. The chapters are following normal way to proceed.
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This scanned manual is well done in that most all the pages except for one is straight and clear- the way I would do them. One page was upside down but that happens. For the money that is charged on this site you get a pretty good deal. Now with complex repairs, I still prefer to us paper manuals which I have to buy at stereomanuals but the one I got here was much less than the $45 he was charging but this is a larger than normal manual for three different units. I am a picky manual user because I have used original manuals from Sony and Teac.
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Very useful service manual, was exactly what i needed.Good quality,reasonable price.Thank you.
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Acurate informations inside the SM and I could repair my old Sansui SC-3330 without any problems. Thanks.
Information and Communication Products Communication Devices 5.4Repair Documentation
5.4.1Description of procedure:
5.4.1.1Diagnosis
The 18µH coil is used in the step up converter which is generating a 5.4 V supply voltage for the power amplifier out of the 2.8V battery voltage. If the coil is mechanically damaged (broken) it produces heavy interference with the acoustical elements of the C25 resulting in a loud humming noise in the earpiece. A broken coil can easily be diagnosed by trying to move it with two fingers. If it moves, the core is broken and the coil has to be replaced.
5.4.1.2Repair by component change
Use hot air to remove defective coil. Avoid excessive heat! Watch surrounding components!! Resolder new coil afterwards
5.4.1.3Repair by SW-Booting
Not possible!
5.4.1.4Test
Retest handset after repair by checking the audio quality with the echo loop of the testprogram.
V1.2
Page 15 of 34
ICP CD ST D. Schnoor 8/99
 $4.99 C25 SIEMENS
User Guide It's a complete guide ( also known as operating manual or owner's manual), and it's in PDF format. A…
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