Nokia 447ZiPlus Service Manual page 5

1-2 product safety notice
Many electrical and mechanical parts in this chassis provide special visual safety protection. The
protection afforded by them cannot necessarily be obtained by using replacement components rated
for higher voltage. wattage. etc..
Before replacing any of these components. read the parts list in this manual carefully. The use of
substitute replacement parts which do not have the same safety characteristics as specified in the
parts list may create shock, fire.
X-RAY radiation or other hazards.
1-3 service notes
1) When replacing parts or circuit boards. wrap the wires around terminals before soldering.
2) When replacing a high wattage resistor (more than 1/2W) on a circuit board keep the resistor
about 10mm (1/2 in ) away from circuit board.
3) Keep wires away from high voltage or high temperature components.
4) Keep wires in their original position so as to reduce interference.
Specifically for the cancellation wires of the TCO electric field emissions reduction purpose. This
black cancellation wire is taken and connected from the maim chassis connector P500 through a
wire clip which fixed on the heat sink of flyback transformer. Then get this wire underneath the round
rotation coil, soldering on the left-hand side of the copper pad which fitted around the red circle of the
anode connection on the tube back.
Also, care must be taken for the I
Board).
This white color and red color wires combined flat wire are used for I
It should be fixed on the left side and rear side of FBT heat-sink by clip wires in order to keep away
from the Deflection wires. High Voltage wire (red) and two focus wires (red and white) from FBT,
2
because I C are very easy to pick up noise from those wires and caused wrong color or wrong
contrast.
2
C wires from P903A(on the main Board) to P904(on the CDT drive
3
2
C communication.