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Excelent service, the manual is complete, very cheap and fast
Alberto
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The item received was as described, as expected. I was pleased with the order. Thank you.
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Superb rendition. Drawings (schematics) complete and unabridged. I do a great deal of vintage audio restoration. Documentation is essential for successful repairs. I have found sources over the years that offer good documentation, but rarely all that is necessary. Owner's Manuals has filled that void with complete and legible documentation. They have narrowed my "favorites" to a more manageable collection. This Denon manual in particular contained the latest revisions level, and offered alterations favorable to updating the item. The Illustrated Parts Breakdown (IPB) was well enough detailed to simplify part symbols and physical locations. You will not be disappointed!
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Clear and concise. Saved me a lot of time and money.
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Superb manual. Exactly what I ordered and made available in a very timely manner.
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How to identify the cause of a power-down that is indicated by 2-times flashing of the red LED
The cause of a power-down that is indicated by 2-times flashing of the red LED can be identified by performing the steps 1 to 3 below: 1 Visual check with the power off 2 Tester check with the power off 3 Check with the power on
A
1 Status check with the power off
Check if the cables and FFC cables that are connected to the Y DRIVE Assy are firmly connected.
B
2 Tester check with the power off
1. Check between Vsus and SUSGND with a tester Disconnect all cables from the X and Y DRIVE Assys and check if there is short-circuiting between Vsus and SUSGND in the X and Y DRIVE Assys. � How to check if there is short-circuiting on the X DRIVE Assy: If there is short-circuiting between Vsus and SUS OUT, and SUS OUT and SUSGND, the X Mask Module is damaged. If they are not short-circuited, check other elements to see if they are short-circuited. � How to check if there is short-circuiting on the Y DRIVE Assy: If there is short-circuiting between Vsus and SUS OUT, and SUS OUT and SUSGND, the Y Mask Module is damaged. If they are not short-circuited, check other elements to see if they are short-circuited. � Check for short-circuiting in the Power supply. Note that at the beginning of measuring with a tester, charging of an electrolytic capacitor may cause a phenomenon like short-circuiting. However, the resistance will soon rise if there is no short-circuiting. 2. Check for short-circuiting between VH and PSUS with a tester Disconnect the cables that connect the bridge connectors between the Y DRIVE Assy and upper and lower SCAN Assys.
D C
� If there is short-circuiting in the upper SCAN Assy, one of Scan ICs in the upper SCAN Assy is damaged. � If there is short-circuiting in the lower SCAN Assy, one of Scan ICs in the lower SCAN Assy is damaged. � If there is short-circuiting in the Y DRIVE Assy, a circuit in the Y DRIVE Assy is short-circuited. If no short-circuiting is detected up to this stage, the power-down in question is proved not to be caused by shortcircuiting. Therefore, it is assumed that the power-down occurred because power had not been supplied to Vsus or VH for some reason.
3 Check immediately after the unit is turned on before a power-down occurs.
If the Vsus voltage does not increase, the POWER SUPPLY Unit is in failure. If the VH voltage does not increase, the VH DC/DC converter in the Y DRIVE Assy is in failure.
E
4 Check the PD detection circuit.
If no problem is detected in steps 1 to 3, a power-down occurred even though the voltage was normal. Therefore, the PD detection circuit may be in failure. By following the above procedures, the real cause of a power-down can be judged.
F
PDP-427XD
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