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DVD-910
User Manual
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Service Manual
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Owner’s Manual
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User Manual
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Service Bulletin
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Denon DVD-910 Service Manual

SERVICE MANUAL
For U.S.A. & Canada model
Ver. 1
MODEL
DVD VIDEO PLAYER

DVD-910

注 意
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
● 本機の仕様は性能改良のため、予告なく変更すること があります。
● 補修用性能部品の保有期間は、製造打切後
●
修理の際は､必ず取扱説明書を参照の上、作業を行って, ください。
● 本文中に使用しているイラストは、説明の都合上現物 と多少異なる場合があります。
X0176V.01 DE/CDM 0306
8年です。
DVD-910
2

TABLE OF CONTENTS

SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
LASER BEAM SAFETY PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
IMPORTANT SAFETY PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
STANDARD NOTES FOR SERVICING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
CABINET DISASSEMBLY INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
BLOCK DIAGRAMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
SCHEMATIC DIAGRAMS / CBA’S AND TEST POINTS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
WAVEFORMS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
WIRING DIAGRAMS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
FIRMWARE RENEWAL MODE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
LEAD IDENTIFICATIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
EXPLODED VIEWS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
PARTS LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Manufactured under license from Dolby Laboratories. "Dolby" and the double-D symbol are trademarks of Dolby Laboratories.
2
DVD-910

SPECIFICATIONS

ITEM CONDITIONS UNIT NOMINAL LIMIT
1. Video Output 75 ohm load Vpp 1.0 ± 0.1
2. Optical Digital Out dBm -18
3. Audio (PCM)
3-1. Output Level 1kHz 0dB Vrms 2.0
3-2. S/N dB 120
3-3. Freq. Response
DVD fs=48kHz 20~22kHz dB ± 0.5
CD fs=44.1kHz 20~20 kHz dB ± 0.5
3-4. THD+N
DVD 1 kHz 0dB % 0.0025
3
CD 1 kHz 0dB % 0.003
NOTES:
1. All Items are measured without pre-emphasis unless otherwise specified.
2. Power supply : AC120 V 60 Hz
3. Load imp. : 100 K ohm
4. Room ambient : 5
°C ~ 40 °C
3
DVD-910
D
4

LASER BEAM SAFETY PRECAUTIONS

This DVD player uses a pickup that emits a laser beam.
Do not look directly at the laser beam coming from the pickup or allow it to strike against your skin.
The laser beam is emitted from the location shown in the figure. When checking the laser diode, be sure to keep your eyes at least 30cm away from the pickup lens when the diode is turned on. Do not look directly at the laser beam.
Caution: Use of controls and adjustments, or doing procedures other than those specified herein, may result in haz­ardous radiation exposure.
rive Mecha Assembly
Laser Beam Radiation
Laser Pickup
Turntable
CAUTION
LASER RADIATION
Location: Inside Top of DVD mechanism.
WHEN OPEN. DO NOT
STARE INTO BEAM.
4
DVD-910

IMPORTANT SAFETY PRECAUTIONS

5

Product Safety Notice

Some electrical and mechanical parts have special safety-related characteristics which are often not evi­dent from visual inspection, nor can the protection they give necessarily be obtained by replacing them with components rated for higher voltage, wattage, etc. Parts that have special safety characteristics are identi­fied by a ! on schematics and in parts lists. Use of a substitute replacement that does not have the same safety characteristics as the recommended replace­ment part might create shock, fire, and/or other haz­ards. The Product’s Safety is under review continuously and new instructions are issued whenever appropriate. Prior to shipment from the factory, our products are carefully inspected to confirm with the rec­ognized product safety and electrical codes of the countries in which they are to be sold. However, in order to maintain such compliance, it is equally impor­tant to implement the following precautions when a set is being serviced.
Precautions during Servicing
A. Parts identified by the ! symbol are critical for
safety. Replace only with part number specified.
B. In addition to safety, other parts and assemblies are
specified for conformance with regulations applying to spurious radiation. These must also be replaced only with specified replacements. Examples: RF converters, RF cables, noise block­ing capacitors, and noise blocking filters, etc.
C. Use specified internal wiring. Note especially:
1)Wires covered with PVC tubing
2)Double insulated wires
3)High voltage leads
D. Use specified insulating materials for hazardous live
parts. Note especially:
1)Insulation tape
2)PVC tubing
3)Spacers
4)Insulators for transistors
E. When replacing AC primary side components
(transformers, power cord, etc.), wrap ends of wires securely about the terminals before soldering.
F. Observe that the wires do not contact heat produc-
ing parts (heatsinks, oxide metal film resistors, fus­ible resistors, etc.).
G. Check that replaced wires do not contact sharp
edges or pointed parts.
H. When a power cord has been replaced, check that 5
- 6 kg of force in any direction will not loosen it.
I. Also check areas surrounding repaired locations.
J. Be careful that foreign objects (screws, solder drop-
lets, etc.) do not remain inside the set.
K. Crimp type wire connector
The power transformer uses crimp type connectors which connect the power cord and the primary side of the transformer. When replacing the transformer, follow these steps carefully and precisely to prevent shock hazards. Replacement procedure
1)Remove the old connector by cutting the wires at a point close to the connector.
Important: Do not re-use a connector. (Discard it.)
2)Strip about 15 mm of the insulation from the ends of the wires. If the wires are stranded, twist the strands to avoid frayed conductors.
3)Align the lengths of the wires to be connected. Insert the wires fully into the connector.
4)Use a crimping tool to crimp the metal sleeve at its center. Be sure to crimp fully to the complete clo­sure of the tool.
L. When connecting or disconnecting the internal con-
nectors, first, disconnect the AC plug from the AC outlet.
5
r
e)

Safety Check after Servicing

DVD-910
6
Examine the area surrounding the repaired location for damage or deterioration. Observe that screws, parts, and wires have been returned to their original posi­tions. Afterwards, do the following tests and confirm the specified values to verify compliance with safety stan­dards.
1. Clearance Distance
When replacing primary circuit components, confirm specified clearance distance (d) and (d’) between sol­dered terminals, and between terminals and surround­ing metallic parts. (See Fig. 1)
Table 1: Ratings for selected area
AC Line Voltage Clearance Distance (d) (d’)
120 V
Note: This table is unofficial and for reference only.
Be sure to confirm the precise values.
≥ 3.2mm (0.126 inches)
2. Leakage Current Test
Confirm the specified (or lower) leakage current between B (earth ground, power cord plug prongs) and externally exposed accessible parts (RF terminals, antenna terminals, video and audio input and output terminals, microphone jacks, earphone jacks, etc.) is lower than or equal to the specified value in the table below.
Measuring Method (Power ON) :
Insert load Z between B (earth ground, power cord plug prongs) and exposed accessible parts. Use an AC volt­meter to measure across the terminals of load Z. See Fig. 2 and the following table.
1.5k
Chassis or Secondary Conducto
Primary Circuit Terminals
dd'
Exposed Accessible Part
Z
0.15 F
Earth Ground
B
Power Cord Plug Prongs
Fig. 1
AC Voltmeter (High Impedanc
Fig. 2
Table 2: Leakage current ratings for selected areas
AC Line Voltage Load Z Leakage Current (i) Earth Ground (B) to:
120 V
Note: This table is unofficial and for reference only. Be sure to confirm the precise values.
0.15µF CAP. & 1.5kΩ RES. Connected in parallel
i≤0.5mA Peak Exposed accessible parts
6

STANDARD NOTES FOR SERVICING

O
P
P
DVD-910
7

Circuit Board Indications

a. The output pin of the 3 pin Regulator ICs is indi-
cated as shown.
Top View
Input
ut
b. For other ICs, pin 1 and every fifth pin are indicated
as shown.
In
in 1
c. The 1st pin of every male connector is indicated as
shown.
in 1
Bottom View
5
10

How to Remove / Install Flat Pack-IC

1. Removal
With Hot-Air Flat Pack-IC Desoldering Machine:.
(1) Prepare the hot-air flat pack-IC desoldering
machine, then apply hot air to the Flat Pack-IC (about 5 to 6 seconds). (Fig. S-1-1)
Fig. S-1-1
(2) Remove the flat pack-IC with tweezers while apply-
ing the hot air.
(3) Bottom of the flat pack-IC is fixed with glue to the
CBA; when removing entire flat pack-IC, first apply soldering iron to center of the flat pack-IC and heat up. Then remove (glue will be melted). (Fig. S-1-6)
(1) Release the flat pack-IC from the CBA using twee-
zers. (Fig. S-1-6)
Instructions for Connectors
1. When you connect or disconnect the FFC (Flexible Foil Connector) cable, be sure to first disconnect the AC cord.
2. FFC (Flexible Foil Connector) cable should be inserted parallel into the connector, not at an angle.
FFC Cable
Connector
CBA
* Be careful to avoid a short circuit.
Caution:
1. Do not supply hot air to the chip parts around the flat pack-IC for over 6 seconds because damage to the chip parts may occur. Put masking tape around the flat pack-IC to protect other parts from damage. (Fig. S-1-2)
2. The flat pack-IC on the CBA is affixed with glue, so be careful not to break or damage the foil of each pin or the solder lands under the IC when removing it.
Hot-air Flat Pack-IC Desoldering
CBA
Masking Tape
Tweezers
Machine
Flat Pack-IC
Fig. S-1-2
7
DVD-910
F
F S
rp
or
n
8
With Soldering Iron:
(1) Using desoldering braid, remove the solder from all
pins of the flat pack-IC. When you use solder flux which is applied to all pins of the flat pack-IC, you can remove it easily. (Fig. S-1-3)
lat Pack-IC
Desoldering Braid
Soldering Iron
Fig. S-1-3
(2) Lift each lead of the flat pack-IC upward one by one,
using a sharp pin or wire to which solder will not adhere (iron wire). When heating the pins, use a fine tip soldering iron or a hot air desoldering machine. (Fig. S-1-4)
(4) Bottom of the flat pack-IC is fixed with glue to the
CBA; when removing entire flat pack-IC, first apply soldering iron to center of the flat pack-IC and heat up. Then remove (glue will be melted). (Fig. S-1-6)
(5) Release the flat pack-IC from the CBA using twee-
zers. (Fig. S-1-6)
Note:
When using a soldering iron, care must be taken to ensure that the flat pack-IC is not being held by glue. When the flat pack-IC is removed from the CBA, handle it gently because it may be damaged if force is applied.
Hot Air Blower
Iron Wire
Soldering Iron
To Solid Mounting Point
Fig. S-1-5
Sha Pin
ine Tip oldering Iron
Fig. S-1-4
CBA
Fine Tip Soldering Iro
(3) Bottom of the flat pack-IC is fixed with glue to the
CBA; when removing entire flat pack-IC, first apply soldering iron to center of the flat pack-IC and heat up. Then remove (glue will be melted). (Fig. S-1-6)
(4) Release the flat pack-IC from the CBA using twee-
zers. (Fig. S-1-6)
Tweezers
Flat Pack-IC
With Iron Wire:
(1) Using desoldering braid, remove the solder from all
Fig. S-1-6
pins of the flat pack-IC. When you use solder flux which is applied to all pins of the flat pack-IC, you can remove it easily. (Fig. S-1-3)
(2) Affix the wire to a workbench or solid mounting
point, as shown in Fig. S-1-5.
(3) While heating the pins using a fine tip soldering iron
or hot air blower, pull up the wire as the solder melts so as to lift the IC leads from the CBA contact pads as shown in Fig. S-1-5
8
DVD-910
P i
d
9
2. Installation
(1) Using desoldering braid, remove the solder from the
foil of each pin of the flat pack-IC on the CBA so you can install a replacement flat pack-IC more easily.
(2) The “I” mark on the flat pack-IC indicates pin 1.
(See Fig. S-1-7.) Be sure this mark matches the 1 on the PCB when positioning for installation. Then presolder the four corners of the flat pack-IC. (See Fig. S-1-8.)
(3) Solder all pins of the flat pack-IC. Be sure that none
of the pins have solder bridges.
Example :
in 1 of the Flat Pack-IC
s indicated by a " " mark.
Fig. S-1-7

Instructions for Handling Semi-conductors

Electrostatic breakdown of the semi-conductors may occur due to a potential difference caused by electro­static charge during unpacking or repair work.
1. Ground for Human Body
Be sure to wear a grounding band (1MΩ) that is prop­erly grounded to remove any static electricity that may be charged on the body.
2. Ground for Workbench
(4) Be sure to place a conductive sheet or copper plate
with proper grounding (1MΩ) on the workbench or other surface, where the semi-conductors are to be placed. Because the static electricity charge on clothing will not escape through the body grounding band, be careful to avoid contacting semi-conduc­tors with your clothing.
< Incorrect >
CBA
Presolder
CBA
Flat Pack-IC
Fig. S-1-8
< Correct >
Grounding Ban
1MΩ
CBA
1MΩ
Conductive Sheet or Copper Plate
9
DVD-910

CABINET DISASSEMBLY INSTRUCTIONS

10
1. Disassembly Flowchart
This flowchart indicates the disassembly steps to gain access to item(s) to be serviced. When reassembling, follow the steps in reverse order. Bend, route, and dress the cables as they were originally.
[1] Top Cover
[3] Front
Assembly
[7] Progressive CBA Unit [10] AV CBA
[8] DVD Main CBA Unit
[9] Holder
[2] Front Unit
[4] Function
CBA
[5] DVD Mecha[6] Shield Plate
[11] Switch CBA
[12] Rear Panel
2. Disassembly Method
ID/
LOC.
No.
[1] Top Cover D1 5(S-1) -
[2] Front Unit D2
[3]
[4]
[5] DVD Mecha
[6] Shield Plate D4 (S-4) -
[7]
[8]
[9] Holder D4 (S-7) -
[10] AV CBA D6 5(S-8), 5(S-9), (L-4) -
[11] Switch CBA D6 Desolder -
[12] Rear Panel D7 3(S-10) -
↓
(1)
PART
Front Assembly
Function CBA
Progressive CBA Unit
DVD Main CBA Unit
↓
(2)
Fig. No.
D3 ---------- -
D3
D4,
D5
D4
D4
↓
(3)
REMOVAL
REMOVE/*UNHOOK/ UNLOCK/RELEASE/ UNPLUG/DESOLDER
*2(L-1), Tray Panel, *2(L-2), *5(L-3), CN6401
6(S-2), Insulation Sheet
3(S-3), *CN201, *CN301
2(S-5), CN6101, CN202
2(S-6), CN1001, CN1601
↓
(4)
Note
1-1 1-2 1-3 1-4 1-5 1-6 1-7
-
2 2-1 2-2 2-3
3
-
-
↓
(5)
(1): Identification (location) No. of parts in the figures (2): Name of the part (3): Figure Number for reference (4): Identification of parts to be removed, unhooked,
unlocked, released, unplugged, unclamped, or des­oldered. P=Spring, L=Locking Tab, S=Screw, CN=Connector *=Unhook, Unlock, Release, Unplug, or Desolder e.g. 2(S-2) = two Screws (S-2), 2(L-2) = two Locking Tabs (L-2)
(5): Refer to “Reference Notes.”
Reference Notes
CAUTION 1: Locking Tabs (L-1), (L-2) and (L-3) are fragile. Be careful not to break them.
1-1. Connect the wall plug to an AC outlet and press
the OPEN/CLOSE button to open the Tray.
1-2. Remove the Tray Panel by releasing two Locking
Tabs (L-1).
1-3. Press the OPEN/CLOSE button again to close the
Tray.
1-4. Press the POWER button to turn the power off.
1-5. Unplug an AC cord.
1-6. Disconnect connector CN6401.
1-7. Release two Locking Tabs (L-2). Then, release
five Locking Tabs (L-3) (to do this, first release two Locking Tabs (A) at the side, and then three Lock­ing Tabs (B) at the bottom.)
CAUTION 2: Electrostatic breakdown of the laser diode in the optical system block may occur as a potential dif­ference caused by electrostatic charge accumulated on cloth, human body etc, during unpacking or repair work.
To avoid damage of pickup follow these procedures.
2-1. Slide out the pickup unit as shown in Fig. D5.
2-2. Short the three short lands of FPC cable with sol-
der before removing the FFC cable (CN201) from it. If you disconnect the FFC cable (CN201), the laser diode of pickup will be destroyed. (Fig. D5)
2-3. Disconnect connector (CN301). Remove three
screws (S-2) and lift the DVD Mecha. (Fig. D4)
CAUTION 3: When reassembling, confirm the FFC cable (CN201) is connected completely. Then remove the solder from the three short lands of FPC cable. (Fig. D5)
10
DVD-910
)
11
(L-1)
(A)
(S-1)
Tray Panel
(L-1)
[1] T op Cover
(L-2)
(S-1)
Fig. D1
CN6401
(S-1
(S-5)
[6] Shield Plate
[7] Progressive CBA Unit
[8] DVD Main CBA Unit
[9] Holder
(S-6)
CN301
(S-7)
(S-4)
CN202
(S-3)
CN201
[5] DVD Mecha
(B)
[3] Front Assembly
(L-3)
Insulation Sheet
(S-2)
[2] Front Unit
(A)
Fig. D2
(S-2)
[4] Function CBA
Fig. D3
Slide
CN1001
CN1601
CN6101
B
A
DVD Mecha
Short the three short lands by soldering
Fig. D4
Pickup Unit
View for A
11
View for B
Fig. D5
)
(S-9)
l
(S-9)
Desolder
[10] AV CBA
(S-9)
(S-9)
DVD-910
12
(S-10)
[11] Switch CBA
(L-4)
(S-8
Fig. D6
HOW TO MANUAL EJECT
1. Remove the Top Case.
2. Rotate the roulette in the direction of the arrow as shown below.
[12] Rear Pane
Fig. D7
View for A
Rotate this roulette in the direction of the arrow
A
12
,
.
t

TROUBLESHOOTING

FLOW CHART NO.1
The power cannot be turned on.
DVD-910
13
Is the fuse normal?
Yes Is normal state restored when once unplugged power cord is plugged again after several seconds?
Yes Is the EV +9V line voltage normal?
Yes Is each voltage of the secondary side normal?
Yes When pressing POWER button (SW2001), is the voltage of 0V supplied to pin(8) of IC2002?
Yes Is the voltage of 5V supplied to pin(1) of IC2002?
Yes Is the voltage of 3.3V outputted to pin(19) of CN1001?
Yes Is the voltage of 0V supplied to pin(18) of IC2002?
Yes Replace IC2002.
FLOW CHART NO.2
The fuse blows out.
No
No
No
No
No
No
No
No
See FLOW CHART No.2 <The fuse blows out.>
Check if there is any leak or shor-circuiting on the primary circuit component, and service it if defective (Q1001, Q1003, T1001, D1001, D1002, D1004, D1005, D1011, C1003, C1005)
Check each rectifying circuit of the secondary circui and service it if defective.
Check POWER button (SW2001) and their periphery, and service it if defective.
Check EV+5V line
Replace DVD Main CBA unit.
Check Q2007 and their periphery, and service it if defective.
and service it if defective.
Check the presence that the primary component is leaking or shorted and service it if defective.
After servicing, replace the fuse.
FLOW CHART NO.3
When the output voltage fluctuates.
Does the photo coupler circuit on the secondary side operate normally?
Yes
Check IC1001, D1012, D1024 and their periphery, and service it if defective.
FLOW CHART NO.4
When buzz sound can be heard in the vicinity of power circuit.
Check if there is any short-circuit on the rectifying diode and the circuit in each rectifying circuit of the secondary side and service it if defective.
FLOW CHART NO.5
-FL is not outputted.
(D1003, D1006, D1008, D1016, D1030, IC1002, Q1002, Q1004, Q1010, Q1011, Q1014)
No
Check the presence that the rectifying diode or circuit is shorted in each rectifying circuit of secondary side, and service it if defective.
Check IC1001, IC1006, D1015, D1048 and their periphery, and service it if defective.
Is -24V voltage supplied to the anode of D1003?
Yes Check if there is any leak or short-circuit on the loaded circuit, and service it if defective.
No
13
Check D1003 and periphery circuit, and service it if defective.
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