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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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very fast detailed and accurate hope to do business again
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7.1.6 TROUBLE SHOOTING
No.
1
Symptoms
The power is not turned on.
Diagnosis Contents
Check the voltage of AT+3.3V, �28V and FLDC on the POWER SUPPLY Unit. Are wires of output connector (POWER PCB ASSY) and CP4003 (DVDM Assy) disconnected or damaged ?
Possible Defective Points
POWER PCB ASSY Connector / cable
A
OPERATION 2 Assy Check that the voltage at IC651-pin 10 (K 1) on the FLKY Assy Tact SW becomes about 2.7V when the POWER key is pressed and 0 V when it (when operation of only the is released. POWER key on the main unit is not accepted) FLKY Assy Check that the voltage at OS651-pin 1 (IR) on the OPERATION1 Assy Remote receiver section (when operation of only the is in the range between 0 and 3.3 V while receiving signals from the remote control unit when any key on it is pressed. POWER key on the remote control unit is not accepted) 2 An opening screen is not displayed on the monitor � Check the voltage of E+6.8V and SW+3.3V on the POWER SUPPLY (The FL display lights. The Unit. POWER SUPPLY Unit mechanism does not work.) � Check the voltage of P.ON-H is about 2.8V on the POWER SUPPLY Unit. DVD MT PCB Assy 1.8V Regulator IC (IC4006)
C
B
Check that the following voltage are output : IC4006-pin 5 : 1.8V, on the DVD MT PCB Assy.
Is a resonator (X4001 : 27MHz) on the DVDM Assy oscillating ? � Is a signal input into IC4004-pin26 (PCE#) on the DVDM Assy ? (Is a signal "H" for 80 mS and then "L" after the power is turned on ?) � Communication with flash ROM. � Are the signals input into IC4005-pin 16 (DWE#), pin 19 (DCS#) and pin 38 (SDCLK) on the DVDM Assy ? (Is a signal fluctuating ?) � Communication with SDRAM
DVD MT PCB Assy Crystal resonator (X4001)
DVD MT PCB Assy DVD IC (IC4002) Flash ROM (IC4004) SDRAM (IC4005)
Is a signal output from IC4004-pin 28 (PRD#) on the DVD MT Assy? (Is a signal fluctuating for several hundred mS after the power is turned DVD MT PCB Assy Flash ROM (IC4004) on ?) Are the signals of IC4001-pin 5(SDA) and pin 6(SCL) on the DVDM Assy fluctuating for one or two seconds after the power is turned ? 3 An opening screen is not displayed on the monitor Check the video signal path between DVD IC (DVD MT Assy IC4002) (The FL display lights. The and video-out terminal (see the block diagram) mechanism does not work.) DVD MT PCB Assy EEPROM (IC4001) DVD MT PCB Assy Video circuit after DVD IC (IC4002)
D
E
F
DV-686A-S
5 6 7 8
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