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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.
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Content A4 and A3 format pages. Exactly what I needed to restore my old receiver.
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Thanks you very much for this "hard to find" service manual.
Will help a lot in repairing this receiver.
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3. OPERATIONS AND TIMING
V. POWER SUPPLY A. AC Driver/DC Power Supply,
1. Outline The AC driver/DC power supply PCB is supplied with AC power when the door switch (SW2) and the power switch (SWl) go.ON. On the other hand, the DC power supply supplies the main body with 24 VDC and 5 VDC. 24 VDC is used to drive the scanner motor (M2), fans and solenoids as well as high-voltage transformer (HVT); 5 VDC is used by the sensors and ICs on the DC controller PCB. DC Power Supply Circuit The 24 VDC for the DC power supply is supplied by the switching regulator. The 5 VDC, on the other hand, is supplied by the DC/DC converter after conversion from 24 VDC. The DC/DC converter generates the reset signal (RESET) after power-on and until the 5VDC supply stabilizes to reset the micro processor, thereby preventing malfunction of the micro processor. 2.
3.
AC Driver Circuit The DC power supply/AC driver PCB has an AC driver circuit and, based on the
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signals from the DC controller PCB, controls the SSRs and relays on the DC power supply/AC driver PCB to drive AC loads. If the DC controller PCB detects an error, the ACOFF signal is generated to turn the relay (KIOI) on the DC power supply/AC driver PCB OFF, thereby shutting off the power to the lamp regulator and the fixing heater. When the power is shut off, switch the copier OFF, and identify the cause; then, switch the copier OFF. Note that repeated short-circuiting and resetting can cause the built-in fuse to blow.
 $4.99 NP6020 CANON
Parts Catalog Parts Catalog only. It's available in PDF format. Useful, if Your equipment is broken and You need t…
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