HarmanKardon-DVD22-cd-sb维修电路原理图.pdf

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1、 harman/kardon, Incorporated 250 Crossways Park Dr. Woodbury, New York 11797 1 harman/kardon Service Bulletin Service bulletin # HK2004-03 October 2004 Warranty labor rate: MINOR repair To: All harman/kardon Service Centers Model: DVD22 Subject: Locked in POWER ON In the event you receive a DVD22 wi

2、th the complaint: “The unit will turn ON with “POWER ON” in the display, but the unit is locked up and will not read a disc, nor will pressing any button accomplish anything, even the Power button”, follow the instructions below. (Behavior is intermittent; unplugging the AC power cord and replugging

3、 the unit in will sometimes reset it.) Synopsis: Add a 4.7K ohm resistor to the indicated area on the bottom of the Main PCB. CAUTION: The DVD22 is an electrostatically sensitive unit and can be damaged by careless handling; you must follow proper static control procedures to prevent damage to the D

4、VD player. 1) Remove the eight plated screws holding the top cover to the unit; remove the top cover. 2) Remove the four molex connectors and one small FFC cable from the Main PCB. 3) Remove the five plated machine screws (top) and the five black screws (rear panel) from the Main PCB. 4) Remove the

5、Main PCB from the unit. 5) On the reverse side (bottom), solder a 4.7K 1/8W resistor (h/k part#299-4.7K or WLD5.630.472) to the indicated area. (Attach one end of the 4.7K resistor to one end of CB407, the other side, to a small through-hole pad near the silkscreen label “CB410”). 6) Replace the Mai

6、n PCB and assemble the unit in reverse order. 7) Test the unit. RadioFans.CN harman/kardon, Incorporated 250 Crossways Park Dr. Woodbury, New York 11797 2 Model Serial Number Status Action DVD22 (120v) WA0007-01000 to WA0007-10449 Unit may lock up after Powering ON Add 4.7K ohm resistor DVD22 (120v)

7、 WA0007-10450 and above Modified by Factory None Required DVD22 (230v) WA0008-01000 to WA0008-26827 Unit may lock up after Powering ON Add 4.7K ohm resistor DVD22 (230v) WA0008-26828 and above Modified by Factory None Required DVD22BK (230v) WA0012-01000 to WA0012-05020 Unit may lock up after Powering ON Add 4.7K ohm resistor DVD22BK (230v) WA0012-05021 and above Modified by Factory None Required RadioFans.CN