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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.
Adjustments Power Reference Oscillator Level Adjustment
Equipment
Test power meter ................................... HP 432A Thermistor Mount ................................ HP 478A Option H75 Digital Voltmeter (DVM)....................... HP 3456A
Procedure
Note The procedure details the key presses required on the HP EPM-441A. For the HP EPM-442A the equivalent key presses should be performed on both channels. 1. Set up the DVM to measure resistance. Connect the DVM between the VRF connector on the rear panel of the HP 432A and pin 1 on the thermistor mount end of the sensor cable. Verify that no power is applied to the HP 478A 2. Round off the DVM reading to two decimal places and record this value as the internal bridge resistance (R) of the test power meter (approximately 200 �).
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R (Internal Bridge Resistance)_______________�
3. Connect the equipment as shown in Figure 3-3. The leads should be isolated from ground. Ensure that the power reference oscillator is off. Ensure that both the power meter under test and the HP 432A have been powered on for at least 30 minutes before proceeding to the next step. 4. Set the HP 432A range switch to coarse zero and adjust the front panel coarse zero control to obtain a zero meter indication. 5. Fine zero the HP 432A on the most sensitive range, then set the range switch to 1 mW. Note Ensure that the DVM input leads are isolated from chassis ground when performing the next step. 6. Set up the DVM to measure microvolts. 7. Connect the positive and negative input leads, respectively, to the Vcomp and VRF connectors on the rear panel of the HP 432A.
3-8
HP EPM-441A/442A Service Guide
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