Sanyo CE28FN1-E - 16 Adjustment and Repair Procedures; Notes about the Adjustment

Service Manual MS CE25FN1-E
10
16. Adjustment and repair procedures
ADJUSTMENT SIGNAL CONDITIONS TEST POINTS ADJUSTMENT POINT ADJUSTMENT PROCEDURE INSTRUMENTS
Power supply Philips pattern Picture: Normalised
Sound: Minimum volume
B1
Cathode D850
VR800 Adjust to obtain:
150V ± 0.5V in CRTs Philips A59/A66EAK071X11 if C651 = 12 nF
148V ± 0.5V in CRTs Philips A59/A66EAK071X11 if C651 = 11 nF
148V ± 0.5V in CRTs Videocolor A59/A66EHJ43X38
150V ± 0.5V in CRTs Panasonic A59/A66ECF50X05
118V ± 0.5V in CRTs Philips A51EAL155X10/X11
Voltmeter DC
Resolution >0,1V
AGC. UHF Band - mid
channel (e.g.CH25)
Aerial signal level: 60dBuV (1mVrms) Pin 1 of TU250
(AGC)
SERVICE/VIF/AGC
Adjust to obtain 3,3V ±0,2V
Voltmeter DC
Resolution >0,1V
Sound IF Any picture Pin 5 of IC1350 L1351
Adjust to obtain 2,3V ±0,15V
Voltmeter DC
Resolution >0,1V
Vertical slope Philips pattern Picture: Normalised CRT Screen SERVICE/GEOMETRY/VERT SLOPE Adjust to achieve that the centre line of the Philips pattern matches the
beginning of the service blanking
Visual adjustment
Vertical centre Philips pattern Picture: Normalised CRT Screen SERVICE/GEOMETRY/VERT SHIFT Adjust to centre the picture in vertical direction Visual adjustment
Vertical size Philips pattern Picture: Normalised CRT Screen SERVICE/ GEOMETRY/VERT AMPLIT Adjust just to get the checked board hidden Visual adjustment
Horizontal centre Philips pattern Picture: Normalised CRT Screen SERVICE/ GEOMETRY/HOR SHIFT Adjust to centre the picture in horizontal direction Visual adjustment
Width (90º) Philips pattern Picture: Normalised CRT Screen L653 Adjust just to get the checked board hidden Visual adjustment
Width (110º) Philips pattern Picture: Normalised CRT Screen SERVICE/ GEOMETRY/EW AMPLIT Adjust just to get the checked board hidden Visual adjustment
Pin Cushion
(110º)
Philips pattern Picture: Normalised CRT Screen SERVICE/ GEOMETRY/PARABOLA Adjust to correct the pin cushion distortion in the way that vertical lateral
lines become straight
Visual adjustment
Corner Pin
Cushion (110º)
Philips pattern Picture: Normalised CRT Screen SERVICE/ GEOMETRY/CORNER PAR Adjust to correct the pin cushion distortion in the corner in the way that
vertical lateral lines become straight
Visual adjustment
Trapezium (110º) Philips pattern Picture: Normalised CRT Screen SERVICE/ GEOMETRY/TRAPEZIUM Adjust to obtain the lateral vertical lines parallel Visual adjustment
G2 Philips pattern Before SERVICE/G2/BRI must be:
32 en CRTs Philips A59/A66EAK071X11
0 en CRTs Philips A51EAL155X10/X11
CRT Screen SERVICE/G2/ADJ
SCREEN potentiometer
Adjust just to see the service line Visual adjustment
White point Philips pattern Picture: Normalised CRT Screen SERVICE/WHITE/GREEN
SERVICE/WHITE/RED
Adjust to obtain a white tone acceptable Visual adjustment
Focus Philips pattern Picture: Normalised CRT Screen FOCUS potentiometer Adjust to obtain the best possible focusing in the centre of screen Visual adjustment
TXT centre Philips pattern Picture: Normalised CRT Screen SERVICE/MORE/CENTR TXT Adjust to centre the OSD in the screen Visual adjustment
Common condition to all adjustments (except AGC): The aerial signal level must be acceptable (the picture doesn’t present snow degradation)
16.1 Notes about the adjustment:
Normalised: Factory picture control normal has the following OSD positions:
• Brightness: 32 (Push key “+” 32 times starting at minimum position)
• Contrast: 58
• Colour: 30