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Service Manual that I received was very helpful to me. Thank you.
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The manual is well organized and is easy to read. The chapters are following normal way to proceed.
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This scanned manual is well done in that most all the pages except for one is straight and clear- the way I would do them. One page was upside down but that happens. For the money that is charged on this site you get a pretty good deal. Now with complex repairs, I still prefer to us paper manuals which I have to buy at stereomanuals but the one I got here was much less than the $45 he was charging but this is a larger than normal manual for three different units. I am a picky manual user because I have used original manuals from Sony and Teac.
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Very useful service manual, was exactly what i needed.Good quality,reasonable price.Thank you.
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Acurate informations inside the SM and I could repair my old Sansui SC-3330 without any problems. Thanks.
15JF-25S
� Screen Adjustment
1. G2 Adjustment 1. 2. 3. 4. 5. 6. 7. 8. 9. Enter the Service Mode (see page 6). Use the channel up or channel down buttons to enter the << BLUE-BACK >> function. Set this to << BLUE-BACK: 0 >>, i.e. blue background is turned off. Turn the set off at the mains. Turn the set back on. Set the picture control settings to normal. Select the SCART input by pressing the TV/SCART button on the remote control. Do not connect an input to the SCART socket. A blank raster will appear. Connect an oscilloscope to TP852 on the CRT PWB. The waveform as in figure 4 should be displayed. Adjust the G2 control (screen voltage) so that the peak of this waveform is 3.0V +/-0.1V above the zero volt line.
� 9GF
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Figure 4
10. Enter the Service Mode. 11. Turn the blue background function back on again - set << BLUUE-BACK: 1 >>. 12. Turn off the receiver using the mains button. 13. The G2 adjustment is now complete.
2. Focus Adjustment 1. 2. 3. Receive a monoscope pattern signal at a level of 60 to 80 dB/µV. Set the picture settings to normal. Adjust the focus potentiometer to obtain maximum definition.
� AGC Adjustment
1. 2. 3. 4. 5. 6. 7. 8. Tune the receiver into a colour bar signal on channel E-12. Set the RF generator to an output signal strength of 57dB/µV (+/-1dBµV) �50 Ohms unbalanced. Connect an oscilloscope to TP201. TP201 is one end of R201. Enter the Service Mode (see page 6). Use the channel up and channel down buttons to enter the AGC mode. By using the volume up and the volume down buttons, adjust the AGC until the voltage on TP201 drops by 0.1V to 0.3V below its maximum value. Change the input signal strength to 66-70 dB/µV and make sure that there is no noise apparent in the picture. Turn the receiver off at the mains, this will exit the Service Mode and store the adjustment.
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