Text preview for : hfe_denon_dn-d4500_bu4500_service.pdf part of DENON hfe denon dn-d4500 bu4500 service DENON CD BU-4500 hfe_denon_dn-d4500_bu4500_service.pdf
Back to : hfe_denon_dn-d4500_bu4500 | Home Ver. 3 Please refer to the MODIFICATION NOTICE. SERVICE MANUAL MODEL JP E3 E2 EK E2A E1C E2K EUTDN-D4500 DOUBLE CD/MP3 PLAYER MODEL JP E3 E2 EK E2A E1C E2K EUTBU4500 3 CD/MP3 DRIVE UNITFor purposes of improvement, specifications anddesign are subject to change without notice.Please use this service manual with referring to theoperating instructions without fail.Some illustrations using in this service manual areslightly different from the actual set. TOKYO, JAPAN Professional Business Company, D&M Holdings Inc. X0233 V.03 DE/CDM 0703 DN-D4500 / BU4500 SAFETY PRECAUTIONS The following check should be performed for the continued protection of the customer and service technician. LEAKAGE CURRENT CHECK Before returning the unit to the customer, make sure you make either (1) a leakage current check or (2) a line to chassis resistance check. If the leakage current exceeds 0.5 milliamps, or if the resistance from chassis to either side of the power cord is less than 460 kohms, the unit is defective. LASER RADIATION Do not stare into beam or view directly with optical instruments, class 3A laser product. CAUTION Please heed the points listed below during servicing and inspection. Heed the cautions! Inspect for safety after servicing!Spots requiring particular attention when servicing, such as Check that all screws, parts and wires removed or discon-the cabinet, parts, chassis, etc., have cautions indicated on nected for servicing have been put back in their original posi-labels or seals. Be sure to heed these cautions and the cau- tions, inspect that no parts around the area that has beentions indicated in the handling instructions. serviced have been negatively affected, conduct an insulation check on the external metal connectors and between the Caution concerning electric shock! blades of the power plug, and otherwise check that safety is ensured.(1) An AC voltage is impressed on this set, so touching inter- nal metal parts when the set is energized could cause (Insulation check procedure) electric shock. Take care to avoid electric shock, by for ex- Unplug the power cord from the power outlet, disconnect the ample using an isolating transformer and gloves when antenna, plugs, etc., and turn the power switch on. Using a servicing while the set is energized, unplugging the power 500V insulation resistance tester, check that the insulation re- cord when replacing parts, etc. sistance between the terminals of the power plug and the ex-(2)There are high voltage parts inside. Handle with extra care ternally exposed metal parts (antenna terminal, headphones when the set is energized. terminal, microphone terminal, input terminal, etc.) is 1M or greater. If it is less, the set must be inspected and repaired. Caution concerning disassembly and assembly!Though great care is taken when manufacturing parts fromsheet metal, there may in some rare cases be burrs on theedges of parts which could cause injury if fingers are moved CAUTION Concerning important safety partsacross them. Use gloves to protect your hands. Many of the electric and structural parts used in the set have Only use designated parts! special safety properties. In most cases these properties are difficult to distinguish by sight, and using replacement partsThe set's parts have specific safety properties (fire resis- with higher ratings (rated power and withstand voltage) doestance, voltage resistance, etc.). For replacement parts, be not necessarily guarantee that safety performance will be pre-sure to use parts which have the same properties. In particu- served. Parts with safety properties are indicated as shownlar, for the important safety parts that are marked ! on wiring below on the wiring diagrams and parts lists is this servicediagrams and parts lists, be sure to use the designated parts. manual. Be sure to replace them with parts with the designat- ed part number. Be sure to mount parts and arrange the wires as they were originally! (1) Schematic diagrams ... Indicated by the ! mark.For safety reasons, some parts use tape, tubes or other insu- (2) Parts lists ... Indicated by the ! mark.lating materials, and some parts are mounted away from the Using parts other than the designated partssurface of printed circuit boards. Care is also taken with the could result in electric shock, fires or otherpositions of the wires inside and clamps are used to keep dangerous situations.wires away from heating and high voltage parts, so be sure toset everything back as it was originally. 2 DN-D4500 / BU4500DISASSEMBLY(Follow the procedure below in reverse order when reassembling.)BU4500 is DN-D4500 without REMOTE CONTROL UNIT(RC-D45).MAIN UNIT (BU4500) 1. Top cover (1) Remove 4 screws 60 and 2 screws 54. (2) Pull up Top cover. Top cover 54 60 60 2. Front panel unit (1) Detach 2 Blind labels on the bottom chassis. (2) Move CD mecha rack in the arrow direction through the label detached chassis opening. Loader Frame comes out. (3) Pull up Loader panel while pulling it towards front. (4) Remove 2 upper screws 54 and 3 lower screws 54, and 2 screws 54 on both sides. (5) Detach Front Panel. 54 54 Loader panel Loader frame 54 Front panel unit Loader panel 54 Loader frame Front panel CD mecha rack Blind label 3 DN-D4500 / BU45003. Mecha (1) unit(1) Remove 2 screws 56 and 2 screws 57. Short land for laser diode(2) Short-circuit the PU short land above.(3) Disconnect FFC cable and Connectors.(4) Detach CD mecha.(5) Remove 5 screws 54. CX302 PU P.W.B.(6) Detach Mecha bracket. Connector 57 CX302Note : CD mecha Do not pull out aslant to prevent Flat cable FFC cable damage. 56 CX302 Do not fail to pull AC cord from wall outlet 56 before disconnect the Flat cable. If AC cord is remained plugged into wall outlet, power is kept supplied in the unit, which may cause danger. 54 54 Mecha bracket 544. Mecha (2) unit(1) Remove 3 screws 52, 5 screws 54, and 2 screws 55.(2) Detach Mecha (2) unit. Mecha (2) unit 52 55 54 54 4 DN-D4500 / BU45005. CD mecha CX302 (1) Short-circuit the PU short land above. Connector (2) Remove 4 screws 51 and a screw 55. CX302 (3) Disconnect FFC cable and Connectors. FFC cable (4) Detach Main P.W.B. and Connect P.W.B.. CX302 (5) Remove a screws 55. (6) Detach P.W.B. frame. (7) Remove 2 screws 56 and 2 screws 57. Main P.W.B. 51 (8) Detach CD mecha. 55 Note : 51 51 Do not pull out aslant to prevent Flat ca- ble damage. Do not fail to pull AC cord from wall outlet before disconnect the Flat cable. If AC cord is remained plugged into wall 51 outlet, power is kept supplied in the unit, which may cause danger. 55 P.W.B. frame Connect P.W.B. 57 56 57 56 CD mecha Mecha bracket Short land for laser diode PU P.W.B.REMOTE CONTROL UNIT(RC-D45) 1. Cover (1) Remove 5 screws. Note : Remote Control unit and its back panel are connected with cables, so pay attention when removing the back panel. Remote Control Unit 5 DN-D4500 / BU4500BLOCK DIAGRAM 6 DN-D4500 / BU45007 DN-D4500 / BU4500SERVICE PROGRAMWhat is Service ProgramService program is a special program intended for confirming servo functions etc.Required Measuring ImplementReference disc (TCD784 or CO-74176)1. Contents of Service ProgramTurn on the power while pressing both BEND+ button of CD1 and OPEN/CLOSE button of CD2 to set the service program.The various check items can be selected with the TRACK SELECT knob, the various test items can be selected with the A1, A2,EXIT/RELOOP and BEND-, CUE buttons.Press either the TRACK SELECT knob or PLAY/PAUSE button to start the check or test and display the result.To eject the disc, press the OPEN/CLOSE button.To cancel the service program, turn the power off. Process No. Function (TRACK Contents (Character-display) Indication) A TRACK SELECT knob is pushed and a version is checked.