Panasonic WV-CM1480 Service Manual page 12

(9). Audio Maximum Output Level Adjustment
Adjust: Increment Button (+)
Decrement Button (–)
Observe: Audio Analyzer
8
Supply the Color Bar signal to the Video Input Connector.
8
Set the Selector (Audio Out or Speaker Out) SW1 to the
Speaker Out position.
8
Set the Output Level and the Oscillation Frequency of the
Audio Analyzer to –14 dBV ± 0.3 dBV, 1 kHz.
(Input level to WV-CM1480/WV-CM1780/WV-CM2080 will
be –8.0 dBV ± 0.3 dBV)
8 Enter to the SUB MENU by pressing the Menu Button
(MENU).
8
Select MAX AUDIO by pressing the Direction Button (C
or D).
8
Adjust MAX AUDIO by pressing the Increment Button (+)
or the Decrement Button (–) so that the output level
becomes 7.4 dBV ± 0.5 dBV on the Audio Analyzer.
(10). Screen Cut off Fine Adjustment
Adjust: SCREEN Control of Flyback Transformer
Observe: Video Monitor Screen
8
Supply the Grayscale signal to the Video Input Connector.
8
Adjust the SCREEN control so that the 8th step of the stair
step becomes cut off.
(11). Purity Adjustment
Adjust: Purity Magnet
Deflection Coil
Observe: Video Monitor Screen
8
This adjustment should be done after aging for more than
20 minutes.
8
Adjust the FOCUS control on the Flyback Transformer for
the best focus and then disconnect the input signal.
8 Degauss the CRT screen with a degaussing coil.
8
Loosen the screw that secure the deflection coil.
8
Move back the deflection coil until it reaches to the purity
magnet.
Front Panel
Front Panel
8 Supply the Red Raster signal to the Video Input
Connector.
8
Adjust the purity magnet so that the red area comes to the
center on the CRT screen as shown in Fig. 4-8.
RED
Main Board
8 Rotate the deflection coil to find the point where the center
portion of the red area becomes equal on the CRT screen.
8
Move the deflection coil forward until the red color fully
occupies the entire screen and tighten the screws that
secure the deflection coil.
Note: For WV-CM1480/WV-CM1780, do not adjust two
– 8 –
Deflection coil
Deflection coil fixing screw
Purity magnet
Convergence magnet-1
Fig. 4-7
Fig. 4-8
variable resistors and magnets on the Deflection
Coil as shown in Fig. 4-9.
Variable Resistors
Fig. 4-9
Convergence magnet-2
RED
Magnets