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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.
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I used it to repair a NAD 7030, but unfortunately, the 7045 is different !
But documentation was useful.
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Content A4 and A3 format pages. Exactly what I needed to restore my old receiver.
CHAPTER 3 EXPOSURE SYSTEM
B.
Controlling the Pre-Heating Mechanism of the Scanning Lamp
To reduce the time over which the scanning lamp reaches its optimum intensity after a press on the Copy Start key, the filament of the scanning lamp is supplied with power. This mechanism is called "pre-heating," and it may be standby pre-heating, pre-activation pre-heating, or activation pre-heating. 1. Standby Pre-Heating The filament is supplied with a voltage of 2.9 ±0.25 V after power-on, during initial rotation, and after copying. If the lamp turns on and then off at the end of copying, standby pre-heating is ended and it will be started as soon as the lamp heater turns on next time. Thereafter, standby pre-heating remains on until the next time the lamp turns on. Pre-Activation Pre-Heating The filament is supplied with a voltage of 4.35 ±0.45 V 1.5 sec before the scanning lamp is turned on for copying. Activation Pre-Heating The filament is supplied with a voltage of 3.8 ±0.4 V during copying. Thereafter, a voltage determined based on the intensity duty value read while the scanning lamp is on will be applied. 3. 2.
C.
Turning On and Off the Scanning Lamp
The scanning lamp is turned on and off by the scanning lamp on signal (FLPWM), scanning lamp clock signal (FLCLK*), and scanning lamp ON signal (FLONOUT) from the reader controller PCB.
D.
Controlling the Intensity of the Scanning Lamp
The FLPWM signal is a pulse signal, and the intensity of the scanning lamp is controlled so that it remains a constant level by changing the duty ratio of the signal according to the scanning lamp intensity signal (FL_S) detected by the intensity detection PCB and the scanning lamp VR setting.
3-8
COPYRIGHT © 1999 CANON INC.
CANON 660/2100 REV.0 FEB. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
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