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Ver. 3
Please refer to the
MODIFICATION NOTICE.
SERVICE MANUAL
MODEL JP E3 E2 EK E2A E1C E2K EUT
DN-D4500
DOUBLE CD/MP3 PLAYER
MODEL JP E3 E2 EK E2A E1C E2K EUT
BU4500 3
CD/MP3 DRIVE UNIT
For purposes of improvement, specifications and
design are subject to change without notice.
Please use this service manual with referring to the
operating instructions without fail.
Some illustrations using in this service manual are
slightly 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 been
tions 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 from
sheet metal, there may in some rare cases be burrs on the
edges of parts which could cause injury if fingers are moved CAUTION Concerning important safety parts
across 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 parts
The set's parts have specific safety properties (fire resis- with higher ratings (rated power and withstand voltage) does
tance, 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 shown
lar, for the important safety parts that are marked ! on wiring below on the wiring diagrams and parts lists is this service
diagrams 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 parts
surface of printed circuit boards. Care is also taken with the
could result in electric shock, fires or other
positions of the wires inside and clamps are used to keep
dangerous situations.
wires away from heating and high voltage parts, so be sure to
set everything back as it was originally.
2
DN-D4500 / BU4500
DISASSEMBLY
(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 / BU4500
3. 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 CX302
Note : 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
54
4. 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 / BU4500
5. 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 / BU4500
BLOCK DIAGRAM
6
DN-D4500 / BU4500
7
DN-D4500 / BU4500
SERVICE PROGRAM
What is Service Program
Service program is a special program intended for confirming servo functions etc.
Required Measuring Implement
Reference disc (TCD784 or CO-74176)
1. Contents of Service Program
Turn 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.