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For Europe model
Ver. 1
SERVICE MANUAL
MODEL DCD-1500AE
SUPER AUDIO CD PLAYER
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
Denon Brand Company, D&M Holdings Inc.
X0243 V.01 DE/CDM 0508
DCD-1500AE
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.
2
DCD-1500AE
DISASSEMBLY
(Follow the procedure below in reverse order when
reassembling.)
1. Top Cover
(1) Remove 8 top and side screws. And remove 2 rear
screws, then detach the Top cover.
2. Front Panel Ass'y
(1) Detach the Loader panel Ass'y by lifting.
(2) Remove 4 top screws and 2 bottom screws of Front
Panel Ass'y.
(3) Remove H/P BRACKET and CHASSIS screw, then
detach the Front Panel Ass'y.
(Refer to Fig. 1)
Fig. 1
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DCD-1500AE
3. Mechanism
(1) Remove 4 screws, then detach the Mechanism.
4. Attachment of Mechanism
(1) Mechanism is put on MECHA BRACKET BOTTOM.
(2) ADJUST.COLLAR is put on 2 places of the front.
(3) 2 front side screws are tightened.
(4) 2 rear side screws are tightened.
ADJUST. COLLAR
MECHA BRACKET BOTTOM
5. Attachment of Mechanism
Follow the procedure below.
(1) 1 screw of volume side is tightened.
(2) 1 screw of H/P jack side is tightened.
(3) (4) 2 screws of H/P jack top is tightened.
1 3 4 2
(Note) When assembling the volume pwb and the bracket,
insert thickness 1.6mm board between the bracket
and volume.
4
DCD-1500AE
Note Handling and Replacement of the
Laser pick-up
1. Disassembly
Do not disassemble or adjust this mechanism due to preci-
sion component.
2. Storage
Do not leave this mechanism in high temperature and hu-
midity. Be sure to prevent this mechanism from static elec-
tricity, dust and excessive forces.
Do not leave this mechanism without a unti-static cover for
the dust.
3. Handling
Do not shock to this mechanism.
Don't touch the parts as follows.To touch them may cause
big trouble.
Trim-potentionmeter
CD laser dode and Fixate of CD laser
Fixate plate of OEIC
High frequency module and DVD laser diode
Objective
Actuator (Include screw, spring, and connected point
actuator and PWB)
The laser diode soldering portion of and is sharp,
be careful especially because it is dangerous.
5
DCD-1500AE
Never touch the objective lens, actuator, laser diode, photo
detector and the trim-potentiometer.
Be sure no dust or soil on the objective lens.
If dust is on the objective lens, below it away by clean air.
If dust or soil remain on the objective lens, use the cleaning
liquid (B4) made by JCB INDUSTRY Ltd. No alternative.
Make sure that a person who handles this mechanism is
well earthed. Be sure to earth to the manufacturing equip-
ment.
Do not approach magnetic materials.
Too much forces on the leads of laser diode, OEIC, and the
printed wiring board, may caused the pickup to damage.
Too much forces on the leads of laser diode, OEIC, and the
printed wiring board, may caused the pickup to damage.
Guide shafts in mechanism should not be forced when you
set the FFC to the connector, which may cause the guide
shafts to deform.
4. Surrounding atmosphere
For proper operation storage and operating environment
should not contain corrosive gases. For example HS2, SO2,
NO2, Cl2 ets. In addition storage environment should not
have materials that emit corrosive gases especially from si-
licic, cyanic, formalin and phenol group. In the mechanism
or set, existence of corrosive gases may cause no rotation
in motor.
5. Laser drive circuit
We solder the Short land on PWB before shipment to pro-
tect laser diode. Open the short landsafte you connect
pick-up your circuit by flat cable. (Refer to Fig. a)
When you unstrap the short solder for the laser diode pro-
tection in the condition which doesn't connect by a flat ca-
ble, the laser diode and PEIC may destroy by static
electricity.
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DCD-1500AE
DIAGNOSTICS OF OPTICAL PICKUP
AND REPLACING TRAVERSE UNIT
Make failure diagnostics of the Optical Pickup as follows.
If the laser drive current (Iop) becomes more than 1.5 times of
the initial value, the Optical Pickup should be replaced.
The laser drive current is registered on the seal attached to
the rear of the Mecha.Unit.
In case of replacing the Pickup, change the whole part of the
Traverse Unit.
No mechanical adjustment is necessary after the replace-
ment.
Disc no read,unsteady playback, etc.
Laser drive current (Iop) check
HF wave form check
(Refer to page 73)
Present value exceeds the ini-
tial value by 1.5 times
Traverse Unit replacing
(See page 8 for details)
Laser current registering after replacement.
Step: Disc playback
Write the measured value on the seal attached to the
Mecha. Unit
*As to the measuring method, refer to page 8,9.
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DCD-1500AE
1. Label Indication of SACD Mechanism.
Example: DVD 30mA
CD 30mA
2. Note for Handling the Laser Pick-Up
the protection for the damage of laser diode.
If you want to change the optical device unit from any other
units, you must keep the following.
(1) It should be done at the desk already took measures the
static electricity in care of removing the OPU's (Optical
device unit) connector cable.
(2) Workers should be put on the "Earth Band".
(3) It should be done to add the solder to the short land to
prevent the broken Laser diode before removing the 24P
FFC cable.
(4) Don't touch OPU's connector parts carelessly.
3. Replacement of the Laser Pick-up
(Traverse Unit)
Check the Iop(Laser drive current)
If the present Iop (current) value exceeds.+50% of the ini-
tial value, replace the Traverse unit(Laser Pick-up) with a
new one.
4. Iop Measurement Method
When measuring Laser drive current (Iop), playback the
discs (CD,SACD) described below, measure Iop for CD
Laser and DVD Laser by the test point (+5V-M2~
LD(CD),LD(DVD))on the SACD P.W.B.
Test Disc :SACD/Philips DAC Test Disc or commercially
available discs.
:CD/TCD-784 (manufactured by ALMEDIO INC)
or commercially available discs.
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DCD-1500AE
4.1. DVD Laser current measurement
LD(DVD) LD(DVD)
+5V-M2 +5V-M2
Oscilloscope Oscilloscope
(1) Connect the oscilloscope to +5V-M2 of test point for GND
side and LD(DVD) of test point for signal side.
(2) Playback the stereolayer track 1 of the SACD Test Disc.
(3) Measure the voltage between +5V-M2 and LD(DVD), cal-
culate Iop by the formula as shown below.
Measurement Voltage Value
Iop = ----------------------------------------------------------------------------
-
14 (Resistance value)
4.2. CD Laser current measurement
(1) Connect the oscilloscope to +5V-M2 of test point for
GND side and LD(CD) of test point for signal side.
(2) Playback the track 1 of the CD Test Disc.
(3) Measure the voltage between +5V-M2 and LD(CD), cal-
culate Iop by the formula as shown below.
Measurement Voltage Value
Iop = ----------------------------------------------------------------------------
-
11.75 (Resistance value)
LD (CD)
LD (DVD)
+5V-M2
1U-3624 SACD MODULE P.W.B. unit foil side
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DCD-1500AE
HOW TO REPLACE TRAVERSE UNIT
Caution: The optical pickup can be damaged easily by
static electricity charged on human body.
Take necessary anti-static measures when
repairing around the optical pickup.
1. Guide Clamp Bracket disassembly
(1) Remove 2 screws.
(2) Remove Guide Clamp Bracket to arrow direction.
2. Tray disassembly
(1) Remove to arrow direction.
(2) Solder the short-circuit (see in the frame).
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DCD-1500AE
3. Traverse Unit disassembly
(1) Remove 24P FFC, 15P FFC and 5P PH WIRE connect-
ing with from the Main P.W.B.
(2) Remove 4 screws fixing Damper.
(3) Remove Traverse Unit to arrow direction.
Note for disassembly Traverse Unit
(1) When assembling, reverse the order of the above.
(2) When inserting Tray, confirm boss on Slide Cam set to
ditch of the Tray (Compare with below drawing).
11
OPEN/CLOSE+PLAY+AC_ON
H.R.NORMAL operation Model Name display
TOC read playback PLAY
(DCD-1500)
title-all of the disc.
OPEN CLOSE A.S.FWD or A.S.RVS
TOC read
A.S.FWD B/E