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SPMS
Careless handling during repair can reduce life drastically.When repairing, make sure
that you are connected with the same potentialas the mass of the set by a wristband with
resistance. Keep componentsand tools also at this potential. Available ESD protection
equipment:
Complete kitESD3 (small tablemat, wristband, connection box, extension cable,and
ground cable) 4822 310 10671.
Wristband tester 4822 344 13999.
Together with the deflection unit and any multi-poleunit, flat square picture tubes form an
integrated unit. The deflectionand the multi-pole units are set optimally at the factory.
Adjustmentof this unit during repair is therefore not recommended.
Be careful during measurements in the high voltage sectionand on the picture tube.
Never replace modules or other components whilethe unit is switched ON.
When you align the set, use plastic rather thanmetal tools. This will prevent any short
circuits and the dangerof a circuit becoming unstable.
Notes
Measurethe voltages and waveforms with regard to the chassis (= tuner)ground (
or hotground (
The voltages and waveforms shown in the diagramsare indicative. Measure them in the
Service Default Mode (see chapter5) with a color bar signal and stereo sound (L: 3 kHz,
R: 1 kHzunless stated otherwise) and picture carrier at 475.25 MHz (PAL)or 61.25 MHz
(NTSC, channel 3).
Where necessary, measure the waveforms and voltages with(
aerial signal. Measurethe voltages in the power supply section both in normal operation
(
) and in standby(
symbols.
The picture tube panel has printed spark gaps.Each spark gap is connected between an
electrode of the picturetube and the Aquadag coating.
The semiconductors indicated in the circuitdiagram and in the parts lists are completely
interchangeable perposition with the semiconductors in the unit, irrespective of thetype
indication on these semiconductors.
7/8/2004
), depending onthe area of circuitry being tested.
). These valuesare indicated by means of the appropriate
Page 3 of 3
),
) and without (
)
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