Ericsson PF 768 free download

File name PF768.PDF

PF768, Standard Electrical Repairs Approved according to 2/FEA 209 544 Trouble-shooting instruction PF 768 Standard electrical repairs 4/00021-2/FEA 209 544/11.C PF768, Standard Electrical Repairs Table of contents 1 Conditions ... 3 1.1 1.2 1.3 Component classes. ... 3 Abbreviations. ... 4 Pin placements ... 6 2 3 4 5 6 7 8 9 10 No serv/not able to connect calls. ... 8 Doesn't start. ... 11 Audio. ... 21 Display. ... 29 SIM ("Insert card"). ... 33 Keyboard ... 37 Illumination and buzzer. ... 42 RTC ... 50 Component lists ... 52 10.1 10.2 10.3 10.4 Explanations ... Component list 2/ROA 117 3235/2 ... Mounting drawing table ... Revision change table ... 52 53 67 67 4/00021-2/FEA 209 544/11.C 2 (68) PF768, Standard Electrical Repairs 1 Conditions 1.1 Component classes. All the components in the phone are divided into classes and after every component in the troubleshooting guide you have a class written. The components are divided into four classes: A, B, C and D.The class of the component depends on how much of the phone's performance is affected when replacing it. Class A and B:A test call towards the "real" net (not only towards a GSM test instrument) and run it through the normal tests is enough to verify the functionality since the performance of the phone is only slightly affected. Class C: Since the tolerances of the component are so great it can substantially affect the performance of the phone you need to calibrate it at station level after replacing the component. Class D components need to be calibrated at board level using very advanced equipment and may therefore not be replaced. Class D: 4/00021-2/FEA 209 544/11.C 3 (68) PF768, Standard Electrical Repairs 1.2 Abbreviations. A: B: C: D: