Service Manuals, User Guides, Schematic Diagrams or docs for : DENON DVD DVD-2900 hfe_denon_dvd-2900_service
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For U.S.A., Canada, Europe
& Japan model
Ver. 2
SERVICE MANUAL
MODEL DVD-2900
DVD AUDIO-VIDEO / 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.
16-11, YUSHIMA 3-CHOME, BUNKYOU-KU, TOKYO 113-0034 JAPAN
Telephone: 03 (3837) 5321
X0168V.02 DE/CDM 0304
DVD-2900 2
SAFETY PRECAUTIONS
LEAKAGE CURRENT CHECK
LASER RADIATION
500V
1M
(1)
(2)
(1)
(2)
2
DVD-2900 3
DISASSEMBLY
(Follow the procedure below in reverse order when reassem-
bling.)
1. Top Cover
(1) Remove 10 screws on the top and both sides, and 2
screws on the rear.
(2) Widen the Top Cover a little laterally, then detach it with
sliding in the arrow direction.
2. Loader Panel, Front Panel
2.1. When the Disc Tray can be ejected electrically
(1) After removing the Top Cover, proceed as follows.
(2) Plug the power cord to the wall outlet, switch on the pow-
er, and press the "OPEN/CLOSE" button to open the
Disc Tray.
(3) Detach the Loader Panel by lifting it in the arrow direc-
tion.
(4) Press the "OPEN/CLOSE" button to close the Disc Tray,
then unplug the power cord.
(5) Disconnect the wire (CX025, CX061) connecting the
Front Panel's P.W.B. and the power PWB in the Chassis.
(6) Remove 4 top screws and 4 bottom screws, then detach
the Front Panel to the arrow direction.
(7) Disconnect the FFC (CX171) connecting the Front Pan-
el's P.W.B. and the main P.W.B. in the Chassis.
3
DVD-2900 4
2.2. When the Disc Tray cannot be ejected electri-
cally
(1) After removing the Top Cover, proceed as follows.
(2) Insert a screwdriver(-) into the left hole of the Mecha. Fix
Bracket, and push the Plate Gear of the DVD Mecha.
slowly to open the Disc Tray.
(3) Remove the Loader Panel, and close the Disc Tray.
(4) Detach the Front Panel following the same steps de-
scribed on the previous page 1.2.1. (5) - (7).
3. Video P.W.B.
(1) Disconnect 33P FFC (CY331) and 5P connector (CY053).
(2) Remove 2 screws on the Video P.W.B.
(3) Remove 2 screws from the rear.
(4) Detach the Video P.W.B. to the arrow direction.
4
DVD-2900 5
4. DVD Mecha.
(1) Disconnect 27P FFC (CY271) and 13P FFC (CY131)
from the Main P.W.B..
(2) Disconnect 12P connector (CY121) from Power P.W.B..
(3) Remove 4 screws on the DVD Mecha and 2 screws on
the Main P.W.B., then take it off in the arrow direction.
5. Audio P.W.B./Power P.W.B.
5.1. Audio P.W.B.
(1) Disconnect 4P connector (CY041).
(2) Remove 5 screws on the Audio P.W.B., 4 screws from
the rear.
5.2. Power P.W.B.
(1) Remove 5 screws on the Power P.W.B..
(2) Disconnect 2P connector (CX024)
5
DVD-2900 6
6. Mecha.Unit
(1) Remove 2 screws on the top of the Mecha. Unit, and de-
tach the Guide Clamp Bracket with sliding in the arrow di-
rection.
(2) Solder the short-circuit on the Traverse Unit. (Refer to
"Traverse Unit Disassembly" on the page 7.
(3) Disconnect the wires (CX151, CX241, CX031, CX051)
connecting with the Main PWB.
(4) Turn over the Mecha. Unit/Main PWB assembly, and re-
move 3 screws.
7. Traverse Unit Disassembly
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.
7.1. Guide Clamp Bracket disassembly
(1) Remove 2 screws.
(2) Remove Guide Clamp Bracket to arrow direction.
6
DVD-2900 7
7.2. Tray disassembly
(1) Remove to arrow direction.
(2) Solder the short-circuit (see in the frame).
7.3. Traverse Unit disassembly
(1) Remove 24P FFC (CX241), 15P FFC (CX151), 5P PH
WIRE (CX051) and 3P PH WIRE (CX031) connecting
with from the Main P.W.B..
(2) Remove 4 screws fixing Damper.
(3) Remove Traverse Unit to arrow direction.
7
DVD-2900 8
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).
8
DVD-2900 9
DIAGNOSTICS OF OPTICAL PICKUP
AND REPLACING TRAVERSE UNIT
Make failure diagnostics of the Optical Pickup as follows.
If the laser drive current 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.
Example: DVD 30mA
CD 30mA
Disc no read,unsteady playback, etc.
Laser drive current check
HF wave form check
(Refer to page 109)
Present value exceeds the ini-
tial value by 1.5 times
Traverse Unit replacing
(See page 7 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 10,11.
9
DVD-2900 10
1. Label Indication of DVD Mechanism.
Laser current consumption value
ex) DVD mA, CD mA
DVD mA, CD mA
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,DVD) described below, measure Iop for CD
Laser and DVD Laser by the test point (+5V-A2 --
LD(CD),LD(DVD))on the Main P.W.B.
Test Disc :DVD/DVDT-S01 or commercially available discs.
:CD/TCD-784 (manufactured by ALMEDIO INC)
or commercially available discs.
10
DVD-2900 11
4.1. DVD Laser current measurement
LD(DVD) LD(DVD)
+5V-A2 +5V-A2
Oscilloscope Oscilloscope
(1) Connect the oscilloscope to +5V-A2 of test point for GND
side and LD(DVD) of test point for signal side.
(2) Playback the title 1 / chapter 1 of the DVD Test Disc.
(3) Measure the voltage between +5V-A2 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-A2 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-A2 and LD(CD), calcu-
late Iop by the formula as shown below.
Measurement Voltage Value
Iop = ----------------------------------------------------------------------------
-
11.75 (Resistance value)
LD(DVD) LD(CD) +5V-A2
Main Unit foil side
11
DVD-2900 12
5. Optical Pick-up Diagnostics and Replace-
ment
When repairing, carry out failure diagnostics by following the
procedure described below.
If the present value of the laser drive current is 50% up to ini-
tial value, it is the point of the pickup replacement.
In case of the pickup replacement, replace the Traverse Unit
with no adjustment.
The initial value is indicated on the label on back side of
Mecha.
NO DISC indicated, Playback not smooth,etc.
Laser drive current check
HF signal check
Present value
50% up to initial value
Traverse Unit replacement
(refer to page 6)
Laser drive current check after replacement.
If the present value is less than 80mA, write on
the new label by hand, put on the new label over
the old label.
If the present value exceeds 80mA, replace the Traverse Unit
a new one.
Cause: Damaged electrostatically when replaced.
12
DVD-2900 13
SERVICE MODE
1. Aging Mode
(1) preparation
(a) Equipment used: Any one of DVD Karaoke Disc (contain-
ing more than 10 titles).
(b) Unit setting : No spec other than the following procedure
(Aging mode).
At the tray open status, press the "POWER" button to
turn on the power while pressing the "PLAY" and
"OPEN/CLOSE" buttons for DVD operation simulta-
neously. mark on the FL lights, and the unit is set
to the heat run mode.
(2) procedure
(a) According the above, set to the aging mode.
(b) Set a DVD Karaoke disc to the tray and press the "PLAY"
button twice. mark on the FL blinks, and aging
operation(after playback title-1 and title-10 of the disc,
the tray open/close is made automatically, then playback
the title-1 again) starts. This aging operation continues
automatically until it is stopped or it stops caused by an
error.In case of some error in DVD, the following error
messages are displayed on the FL.
No Error contents FL display
1 Bad Disc ERROR 02 ERROR 02
2 Focus Error ERROR 02 ERROR 02
3 Read Error ERROR 02 ERROR 02
4 Tracking Error ERROR 04 ERROR 04
5 Tray Error ERROR 05 ERROR 05
6 Navigation Pack Read Error ERROR 06 ERROR 06
2. Initial Setting Mode
(1) Preparation
(a) Equipment used: None
(b) Unit setting: No spec other than the following procedure
(2) Procedure
(a) Initialize the DVD player when ◦ Jabse Service Manual Search 2024 ◦ Jabse Pravopis ◦ onTap.bg ◦ Other service manual resources online : Fixya ◦ eServiceinfo