NAD-T752-avr-sur 维修电路原理图.pdf
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1、 Service Information T752 Software Upgrade (Revised) Determine software version. 1. Turn on the unit and then select an input (eg. DVD) 2. Now press the AUDIO and VIDEO buttons at the same time for 1-2 seconds. 3. The version of software will appear in the display eg. 1.06 A7 or 1.19. See note below
2、 if upgrading from 1.06 or earlier. 4. The current software in the microprocessors are 1.22 A7. Replacing the microprocessor (see attached photo) 1. Remove the top cover. 2. The front panel is easily removed .The top of the front panel is held in place with four screws on top and five on bottom. 3.
3、Once the screws are removed pull the front panel forward and unplug the ribbon cable on your right side and the four pin connector as well. 4. Unplug the three pin and eight pin cables on the left side. 5. The microprocessor can now be removed. 6. Locate U201 and if required U202, see diagrams for r
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