6.Only genuine parts must be used for replacing components5.The regulations of the country concerned must also be ob-4.Before delivery, the device and the connecting leads (includ-3.VDE 0701, Part 2, contains regulations on the repair, modifi-2.It is necessary to follow the regulations and safety warnings1.The repair, modification and testing of mains-operated elec-Safety warnings/regulations2.Shielded packaging using conductive materialsElectrostatically shielded MOS workstations 1.
marked with the symbol served.regulation 0701, part 1. tive earth conductor must be verified by measurement to VDE 0701, part 200. The low-resistance continuity of the protec- lent leakage current must be measured according to VDE al inspection, and the insulation resistance and the equiva- ing any protective earth conductor fitted) must undergo visu-their accessories. cation and testing of mains-operated electronic devices andwarnings applicable in the country concerned. to VDE 0701, part 200, as well as the regulations and safetyby qualified persons. tronic devices and their accessories must only be performedstations. aging must only be packed and unpacked at shielded work- Sensitive components requiring the use of protective pack- protective bags, foam plastic, film sheeting or containers. Conductive plastics are available in the form of transparent tive plastics are used for packaging and transport purposes. To protect against electrostatic charges, electrically conduc-sistors. uring equipment chassis are also earthed with discharge re- with isolating transformer in each of the devices used. Meas- ment at shielded workstation is only possible in conjunction ionisation. The use of soldering irons and measuring equip- technician working there. Dielectrics are discharged by air resistor which earth all conductive materials, including the trostatically shielded MOS workstation is fitted with discharge handled at workstation with electrostatic shielding. An elec- Components sensitive to electrostatic discharge must be
Note on electrostatic shielding
.
number 291-90274.920). The extension lead wire kit is supplied as a service kit. (Part Note:5.After servicing ensure all wiring is returned to its original po-4.Fit the three extension leads to the signal board making sure3.Remove the front metal cover from the signal board (fig. 5).2.Remove the four screws (A) (fig. 4) from the plastic AV cover1.Remove the signal board from the main chassis (Basic board),Service position for the signal board3.After servicing ensure all wiring is returned to its original po-2.Undo the cable fixtures. Turn the chassis through 901.Hold and lift the rear of the chassis and gently pull the chas-How to move the chassis into the service positionsame time slide rear panel to the rear (fig. 1). Insert screw driver into recess Unscrew the five rear panel screws Rear panel removal
sition and fixed.that the signal board does not touch the basic board (fig. 7).Do the same for the rear metal cover (fig. 6).and unclip the AV cover from the signal board.ensuring all leads are disconnected.sition and fixed.clockwise and place the chassis behind the set (fig. 3).sis toward you (fig. 2).
V
. Depress interlocking and at the
R
to remove the rear panel.
°
anti-
Please remove the AV cover at the damaged signal board. Important!-If you want to change the signal board at the service head office-If the error is still there, it's because of another component on-If you get a static picture, the EAROM is out of order (possible-Remove the EAROM (I 1891) from the printed circuit board. Thescribed: There is any error on the signal board, please proceed as de-+
the programming of the TV set. into the new one. So you don't need to make the alignment and in Kronach, insert the EAROM from the damaged signal boardthe signal board.geometry errors remain unconsidered).TV is able to keep running.
MediaPlus Repair information for the signal board |
ACEC
