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Sharp 8C221 Service Manual page 16

Pal system colour tv

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Test Equipment Connections:
GENERAL . . . . . . . Connect AC power plug through the isola-
Set the Colour control to the centre of its range.
Set the receiver to normal operation.
ADJUSTMENT
STEP
1
Connect Oscilloscope to TP805 (Vertical range O.SV/cm)
Adjust 4.43MHz
2
COLOUR SYNC. ALIGNMENT
ADJUSTMENT
STEP
Connect a short clip lead between TP806 and TP807.
1
the Colour Killer control to fully counter cloc!:wise position.
Turn
Adjust APC Trans.
2
Remove a short clip lead between TP806 and TP807.
3
A D J U S T
TRANSFORM ER
0
0
0
PEDESTAL 040g
0
0
0
0
Refer to Figure 13.
COMPONENT
COMPONENT
A D J U S T
SUB CARRIER
0
0
Figure 13. 4.43MHz Oscillator and Colour Sync. Alignment
OSCILLOSCOPE . . . . . . . . . . . . Connect through direct probe
described. The frequency response of vertical input
should be flat to at least MHz.
COLOUR BAR GENERATOR . . . . . . . . . ..Connect to receiver
antenna terminals. Switch Pattern control to Colour
Bar position.
reception.
PROCEDURE
Adjust T803 for maximum deflection on scope.
(Output level 1 .l * 0.3V p-p)
PROCEDURE
Adjust APC Trans (T802) to obtain colour sync.
COLOR
0
Adjust receiver for normal colour

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