Vg2 Adjustment
1. Activate the SAM.
2. Go to the WHITE TONE sub menu.
3. Set the values of NORMAL RED, GREEN and BLUE to “32”.
4. Go, via the MENU key, to the normal user menu and set
5. SATURATION/COLOR to “0”.
6. CONTRAST to “0”.
7. BRIGHTNESS to minimum (OSD just visible).
8. Return to the SAM via the MENU key.
9. Connect the RF output of a pattern generator to the antenna input. Test pattern is
a 'black' picture (blank screen on CRT without any OSD info) with a signal
strength of 1 V_pp.
10. Set the channel of the oscilloscope to 50 V/div and the time base to 0.2 ms
(external triggering on the vertical pulse). Ground the scope at the CRT panel
and connect a 10:1 probe to one of the cathodes of the picture tube socket (see
diagram B).
11. Measure the cut off pulse during first full line after the frame blanking (see figure
“V_cutoff waveform”). You will see two pulses, one being the “cut off” pulse and
the other being the “white drive” pulse. Choose the one with the lowest value; this
is the “cut off” pulse.
12. Select the cathode with the highest V_dc value for the alignment. Adjust the
V_cutoff of this gun with the SCREEN potentiometer (see figure “Top view family
board”) on the LOT to 160 V_dc, except for the 25/28BLD picture tube (Black
Line Display, for EU only); this tube must be aligned to 140 V_dc.
13. Restore BRIGHTNESS and CONTRAST to normal (= 31).
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Страница 35: ...Figure Service position Mono Carrier ...
Страница 69: ...Power Supply Set Not Working Figure Fault finding tree Set not working ...
Страница 70: ...Set Does Not Start Up Figure Fault finding tree Set does not start up ...
Страница 73: ...Blank Screen Figure Fault finding tree Blank screen ...
Страница 76: ...Picture Ok No Sound Figure Fault finding tree Picture ok no sound ...
Страница 77: ...Unable To Perform Tuning Figure Fault finding tree Unable to perform tuning ...
Страница 80: ...Audio Processing No Sound Figure Fault finding tree No sound ...
Страница 83: ...Hardware Alignments Figure Top view family board ...
Страница 86: ...Software Alignments and Settings Figure Service Mode overview ...
Страница 118: ...Figure Geometry alignments ...
Страница 172: ...All Models 7661 Chassis Overview ...
Страница 173: ...All Models 7661 Power Supply A1 ...
Страница 174: ...All Models 7661 Deflection A2 ...
Страница 175: ...All Models 7661 Tuner IF A3 ...
Страница 176: ...All Models 7661 Hercules A4 ...
Страница 177: ...All Models 7661 Features Connectivities A5 ...
Страница 178: ...All Models 7661 Class D Audio Amplifier A6 ...
Страница 179: ...All Models 7661 Audio Amplifier A7 ...
Страница 180: ...All Models 7661 Rear I O Cinch A8 ...
Страница 181: ...All Models 7661 Front Control A9 ...
Страница 182: ...All Models 7661 DVD Power Supply A10 ...
Страница 183: ...All Models 7661 CRT Panel B1 ...
Страница 184: ...All Models 7661 Eco Scavem B2 ...
Страница 185: ...All Models 7661 Side AV Headphone Panel D ...
Страница 186: ...USED ONLY IN MODELS 25PT6341 85 7661 Side Jack Panel Wide ...
Страница 187: ...NOT USED IN MODELS 25PT6341 85 27MS6341 37 27PT5441 37 32MS6341 37 32PT5441 37 33PT5441 85 7661 Top Control Panel E ...
Страница 188: ...USED ONLY IN MODELS 27MS6341 37 32MS6341 37 7661 Top Control Panel Round ...
Страница 189: ...USED ONLY IN MODELS 26PW6341 37 28PW6341 85 30PW6341 37 32PW6341 85 7661 Linearity Panorama Panel G ...
Страница 190: ...NOT USED IN MODELS 27ST6210 27 7661 LTI CTI Interface Panel H ...
Страница 191: ...NOT USED IN MODELS 25PT6341 85 27PT5441 37 32PT5441 37 33PT5441 85 7661 Front Interface Panel J ...
Страница 192: ...USED ONLY IN MODELS 27ST6210 27 7661 EPS Module ...
Страница 193: ...USED ONLY IN MODELS 27ST6210 27 7661 SP LS Module ...
Страница 194: ...USED ONLY IN MODELS 27ST6210 27 7661 ITV Interface Module ...
Страница 195: ...All Models 7661 Layout Mono Carrier Top Side ...
Страница 196: ...All Models 7661 Layout Mono Carrier Overview Bottom Side ...
Страница 197: ...All Models 7661 Layout CRT Panel Top Side ...
Страница 198: ...All Models 7661 Layout CRT Panel Bottom Side ...
Страница 199: ...All Models 7661 Layout Side AV Headphone Panel Top Side ...
Страница 200: ...All Models 7661 Layout Side AV Headphone Panel Bottom Side ...
Страница 201: ...USED ONLY IN MODELS 25PT6341 85 7661 Side Jack Panel Wide Top Side ...
Страница 202: ...USED ONLY IN MODELS 25PT6341 85 7661 Side Jack Panel Wide Bottom Side ...
Страница 205: ...USED ONLY IN MODELS 27MS6341 37 32MS6341 37 7661 Top Control Panel Round Top Side ...
Страница 206: ...USED ONLY IN MODELS 27MS6341 37 32MS6341 37 7661 Top Control Panel Round Bottom Side ...
Страница 207: ...USED ONLY IN MODELS 26PW6341 37 28PW6341 85 30PW6341 37 32PW6341 85 7661 Layout Linearity Panorama Panel Top Side ...
Страница 208: ...NOT USED IN MODELS 27ST6210 27 7661 Layout LTI CTI Interface Panel Top Side ...
Страница 209: ...NOT USED IN MODELS 27ST6210 27 7661 Layout LTI CTI Interface Panel Bottom Side ...
Страница 210: ...NOT USED IN MODELS 25PT6341 85 27PT5441 37 32PT5441 37 33PT5441 85 7661 Layout Front Interface Panel Top Side ...
Страница 211: ...NOT USED IN MODELS 25PT6341 85 27PT5441 37 32PT5441 37 33PT5441 85 7661 Layout Front Interface Panel Bottom Side ...
Страница 212: ...USED ONLY IN MODELS 27ST6210 27 7661 EPS Module Top Side ...
Страница 213: ...USED ONLY IN MODELS 27ST6210 27 7661 SP LS Module Top Side ...
Страница 214: ...USED ONLY IN MODELS 27ST6210 27 7661 SP LS Module Bottom Side ...
Страница 215: ...USED ONLY IN MODELS 27ST6210 27 7661 ITV Interface Module Top Side ...
Страница 216: ...USED ONLY IN MODELS 27ST6210 27 7661 ITV Interface Module Bottom Side ...
Страница 217: ...All Models 7661 Testpoint Overview Mono Carrier ...
Страница 218: ...All Models 7661 Testpoint Overview CRT ...
Страница 219: ...All Models 7661 Testpoint Overview LTI Panel ...
Страница 220: ...All Models 7661 Wiring Diagram ...
Страница 221: ...All Models 7661 Block Diagram Supply and Deflection ...
Страница 222: ...All Models 7661 Block Diagram Video ...
Страница 223: ...All Models 7661 Block Diagram Audio Control ...
Страница 224: ...All Models 7661 I2C and Supply Voltage Overview ...