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Great copy of the manual, has all information required for servicing,
I work at an authorized service center and I can tell if a manual is as it should be. This one is. It may be a scan, but a very good one at that. The interesting part for me was the curcuit diagram which was scanned at high quality, making it as good as the original. I will definitely be back as a customer. I need not say this, but I will: the price was the best. Thank you owner-manuals.com .
really a very good manual even sometimes the quality is no so good as before still very readible and very very useful!
FAST very good and clear a great unexpensive job!!! very recomended for all people who are preofessional or hobbists as me!!!!!!
Thank you very much for this Service Manual, it helped us a lot to repair the M-4318!
...BUT: The parts list is missing and the free parts katalog on web isn't complete, so now we don't know the part numbers of the defect parts :(
We had to build them out of a working machine, and need the numbers to reorder the missing parts now.
SYMPTOM 4. Incoming call alert transducer audio, distorted or volume is too low. PROBABLE CAUSE a) Faulty alert Transducer VERIFICATION AND REMEDY Replace Alert Transducer from rear housing refer to disassembly procedure.If not Alert then proceed to b) Replace Logic/RF Board Assembly (refer to symptom 1c). Verify that the fault has been cleared and re-assemble the unit with the new PCB. Gain access to the Microphone as described in the DISASSEMBLY instructions in this manual. . Check connections. If connector is faulty proceed to c if the connector is OK, proceed to b. Gain access to microphone .Disconnect and substitute a known good Microphone. Place a call and verify as heard by called party. If good, reassemble unit with new Microphone. If Microphone is not at fault, re-install original Microphone and proceed to c. Replace Logic/RF Board Assembly (refer to symptom 1c). Verify that the fault has been cleared and re-assemble the unit with the new PCB. Ensure pads on PCB are clean and that speaker contacs are sat almost vertical to each other. If Ok replace with known good speaker and check for call quality. If still poor proceed to c) Attempt a re-phasing of the unit and recheck the symptom. If symptom is the same but unit re-phases correctly, check to make sure the antenna connector is correctly soldered to the main board and that the antenna is fitted correctly. If ok, substitute a known good antenna assembly. If this does not cure the fault, re-install the original antenna then proceed to d). d) Replace Logic/RF Assembly (refer to symptom 1c). Verify that the fault has been cleared and Reassemble the unit with the new PCB. Initially check that the contacts on the card are not dirty. Clean if necessary, and check if fault has been eliminated. If the contacts are clean, insert a Known good SIM card into the unit. Power up the unit and confirm whether or not the card has been accepted. If the fault no longer exists, the defective SIM card should be replaced. If the SIM card is not at fault, proceed to b. Replace Logic/RF Board Assembly (refer to symptom 1c). Verify that the fault has been cleared and re-assemble the unit with the new PCB.
b)Main RF / Logic PCB defective
5. Personal telephone transmit audio is weak, (usually indicated by called parties complaining of difficulty in hearing voice from personal phone).
a) Microphone connections to the main RF / Logic board are defective.
b) Microphone defective
c) Logic/RF Board Assembly defective. 6. Personal telephone receive audio is weak and/or distorted. (From speaker) Dirty Contacts / Misalignment of contacts or faulty speaker.
c) Antenna assembly is defective.
d) Logic/RF Board Assembly Defective.
7. Personal telephone will not recognize/accept SIM card
a) SIM card defective
c) Logic/RF Board Assembly Defective.
SYMPTOM 9. Internal Charger not working
PROBABLE CAUSE a) Batteries faulty
a) Faulty charger circuit on main board defective 10. No / Weak audio when using a) Headset not fully pushed
VERIFICATION AND REMEDY Replace suspect batteries with known good items. Insert charger and ensure battrey charging icon flashes if OK, replace batteries if batteries still do not charge proceed to b) Replace Logic/RF Board Assembly (refer to symptom 1c). Verify that the fault has been cleared and re-assemble the unit with the new PCB. Fully ensure the â€˜clickâ€™ is felt on the jack socket. If
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It's a complete guide ( also known as operating manual or owner's manual), and it's in PDF format. A…