Denon DVD-910 User manual

SERVICE MANUAL
MODEL DVD-910
DVD VIDEO PLAYER
For U.S.A. & Canada model
16-11, YUSHIMA 3-CHOME, BUNKYOU-KU, TOKYO 113-0034 JAPAN
X0176V.01 DE/CDM 0306
注 意
サービスをおこなう前に、このサービスマニュアルを
必ずお読みください。本機は、火災、感電、けがなど
に対する安全性を確保するために、さまざまな配慮を
おこなっており、また法的には「電気用品安全法」に
もとづき、所定の許可を得て製造されております。
従ってサービスをおこなう際は、これらの安全性が維
持されるよう、このサービスマニュアルに記載されて
いる注意事項を必ずお守りください。
● 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 8年です。
Some illustrations using in this service manual are
slightly different from the actual set.
●
●
Please use this service manual with referring to
the operating instructions without fail.
●
For purposes of improvement, specifications and
design are subject to change without notice.
●
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。
Ver. 1

2
2
DVD-910
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.

3
3
DVD-910
SPECIFICATIONS
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
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
CD 1 kHz 0dB % 0.003

4
4
DVD-910
D
rive Mecha Assembly
Laser Beam Radiation
Laser Pickup
Turntable
LASER RADIATION
WHEN OPEN. DO NOT
STARE INTO BEAM.
CAUTION
LASER BEAM SAFETY PRECAUTIONS
This DVD player uses a pickup that emits a laser beam.
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 haz-
ardous radiation exposure.
Do not look directly at the laser beam coming
from the pickup or allow it to strike against
your skin.
Location: Inside Top of DVD mechanism.

5
5
DVD-910
IMPORTANT SAFETY PRECAUTIONS
Product Safety Notice
Some electrical and mechanical parts have special
safety-related characteristics which are often not evi-
dent 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 identi-
fied by a !on schematics and in parts lists. Use of a
substitute replacement that does not have the same
safety characteristics as the recommended replace-
ment part might create shock, fire, and/or other haz-
ards. 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 rec-
ognized 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 impor-
tant 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 block-
ing 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, fus-
ible 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 clo-
sure of the tool.
L. When connecting or disconnecting the internal con-
nectors, first, disconnect the AC plug from the AC
outlet.

6
6
DVD-910
Chassis or Secondary Conducto
r
dd'
Primary Circuit Terminals
AC Voltmeter
(High Impedanc
e)
Exposed Accessible Part
BEarth Ground
Power Cord Plug Prongs
Z
1.5k 0.15 F
Safety Check after Servicing
Examine the area surrounding the repaired location for
damage or deterioration. Observe that screws, parts,
and wires have been returned to their original posi-
tions. Afterwards, do the following tests and confirm the
specified values to verify compliance with safety stan-
dards.
1. Clearance Distance
When replacing primary circuit components, confirm
specified clearance distance (d) and (d’) between sol-
dered terminals, and between terminals and surround-
ing metallic parts. (See Fig. 1)
Table 1: Ratings for selected area
Note: This table is unofficial and for reference only.
Be sure to confirm the precise values.
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 volt-
meter to measure across the terminals of load Z. See
Fig. 2 and the following table.
AC Line Voltage Clearance Distance (d) (d’)
120 V ≥ 3.2mm (0.126 inches)
Table 2: Leakage current ratings for selected areas
Note: This table is unofficial and for reference only. Be sure to confirm the precise values.
AC Line Voltage Load Z Leakage Current (i) Earth Ground (B) to:
120 V 0.15µF CAP. & 1.5kΩ RES.
Connected in parallel i≤0.5mA Peak Exposed accessible parts
Fig. 1
Fig. 2

7
7
DVD-910
STANDARD NOTES FOR SERVICING
Circuit Board Indications
a. The output pin of the 3 pin Regulator ICs is indi-
cated as shown.
b. For other ICs, pin 1 and every fifth pin are indicated
as shown.
c. The 1st pin of every male connector is indicated as
shown.
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.
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)
(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)
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.
Top View
O
ut In
Bottom View
Input
5
10
P
in 1
P
in 1
FFC Cable
Connector
CBA
* Be careful to avoid a short circuit.
Fig. S-1-1
Hot-air
Flat Pack-IC
Desoldering
Machine
CBA
Flat Pack-IC
Tweezers
Masking
Tape
Fig. S-1-2

8
8
DVD-910
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)
(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)
(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)
With Iron Wire:
(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)
(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
(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.
F
lat Pack-IC Desoldering Braid
Soldering Iron
Fig. S-1-3
F
ine Tip
S
oldering Iron
Sha
rp
Pin
Fig. S-1-4
To Solid
Mounting Point
Soldering Iron
Iron Wire
or
Hot Air Blower
Fig. S-1-5
Fine Tip
Soldering Iro
n
CBA
Flat Pack-IC
Tweezers
Fig. S-1-6

9
9
DVD-910
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.
Instructions for Handling
Semi-conductors
Electrostatic breakdown of the semi-conductors may
occur due to a potential difference caused by electro-
static charge during unpacking or repair work.
1. Ground for Human Body
Be sure to wear a grounding band (1MΩ) that is prop-
erly 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-conduc-
tors with your clothing.
Example :
P
in 1 of the Flat Pack-IC
i
s indicated by a " " mark. Fig. S-1-7
Presolder
CBA
Flat Pack-IC
Fig. S-1-8
CBA
< Incorrect >
CBA
Grounding Ban
d
Conductive Sheet or
Copper Plate
1MΩ
1MΩ
< Correct >

10
10
DVD-910
CABINET DISASSEMBLY INSTRUCTIONS
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.
2. Disassembly Method
(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 des-
oldered.
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 Lock-
ing Tabs (B) at the bottom.)
CAUTION 2: Electrostatic breakdown of the laser diode
in the optical system block may occur as a potential dif-
ference 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)
ID/
LOC.
No.
PART
REMOVAL
Fig.
No.
REMOVE/*UNHOOK/
UNLOCK/RELEASE/
UNPLUG/DESOLDER
Note
[1] Top Cover D1 5(S-1) -
[2] Front Unit D2
*2(L-1), Tray Panel,
*2(L-2), *5(L-3),
CN6401
1-1
1-2
1-3
1-4
1-5
1-6
1-7
[3] Front
Assembly D3 ---------- -
[4] Function
CBA D3 6(S-2), Insulation Sheet -
[5] DVD Mecha D4,
D5
3(S-3), *CN201,
*CN301
2
2-1
2-2
2-3
3
[6] Shield Plate D4 (S-4) -
[7] Progressive
CBA Unit D4 2(S-5), CN6101, CN202 -
[8] DVD Main
CBA Unit D4 2(S-6), CN1001, CN1601 -
[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)
↓
(2)
↓
(3)
↓
(4)
↓
(5)
[1] Top Cover
[2] Front Unit
[3] Front
Assembly
[5] DVD Mecha[6] Shield Plate
[4] Function
CBA
[7] Progressive CBA Unit [10] AV CBA
[8] DVD Main CBA Unit
[9] Holder
[11] Switch CBA
[12] Rear Panel

11
11
DVD-910
(S-1)
(S-1
)
[1] Top Cover
(S-1)
Fig. D1
[2] Front Unit
Tray Panel
(A)
(A)
(L-3)
(L-2)
CN6401
(L-1)
(L-1)
(B)
Fig. D2
[4] Function
CBA
(S-2)
(S-2)
Insulation Sheet
[3] Front Assembly
Fig. D3
[5] DVD
Mecha
(S-3)
(S-4)
(S-7)
(S-5)
(S-6)
CN201
CN202
CN301
[8] DVD
Main CBA
Unit
[9] Holder
[7] Progressive
CBA Unit
[6] Shield
Plate
CN1601
CN1001
CN6101 Fig. D4
View for A
Pickup Unit
B
A
Short the three short
lands by soldering
View for B
Slide
DVD Mecha
Fig. D5

12
12
DVD-910
[10] AV CBA
(S-8
)
(S-9)
(S-9)
(S-9)
(S-9)
[11] Switch
CBA
Desolder
(L-4)
Fig. D6
(S-10)
[12] Rear Pane
l
Fig. D7
Rotate this roulette in
the direction of the arrow
A
View for A
HOW TO MANUAL EJECT
1. Remove the Top Case.
2. Rotate the roulette in the direction of the arrow as
shown below.

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

14
14
DVD-910
FLOW CHART NO.7
P-ON+5V is not outputted. (P-ON+9V is outputted normally.)
Is the "H" pulse inputted into the base of Q1004?
Replace Q1004.
Check R1068 and D1046, and service it if defective
.
Yes
No
FLOW CHART NO.8
P-ON+3.3V is not outputted. (P-ON+9V is outputted normally.)
Is 3.3V voltage supplied to the collector of Q1011?
Replace Q1011 and R1067.
Check D1008, D1015, C1007, C1038, L1007 and
the periphery circuit, and service it if defective.
Yes
No
FLOW CHART NO.9
EV+5V is not outputted.
Is EV+9V outputted normally?
Check Q1014, D1047 and the periphery circuit,
and service it if defective.
Refer to "FLOW CHART NO.6"
<P-ON+9V (EV+9V) is not outputted.>
Yes
No
FLOW CHART NO.6
P-ON+9V (EV+9V) is not outputted.
Is 9V voltage supplied to the emitter of Q1002?
Is the voltage of base on Q1002 lower than the
voltage of emitter on Q1002 when turning the power on?
Replace Q1002.
Check D1030, D1048, C1035, C1048, L1009 and
the periphery circuit, and service it if defective.
Check Q1016 and PWRCON line and service it if
defective.
Yes
Yes
No
No
FLOW CHART NO.10
EV+1.5V is not outputted.
Is 2.5V voltage supplied to Pin(1) of IC1002?
Is 1.25V voltage supplied to Pin(4) of IC1002?
Replace IC1002. Replace IC2002
.
Check the circuit between Pin(19)
of IC2002 and Pin(4) of IC1002
,
and service it if defective.
Check D1006, C1014, C1050, L1008 and the
periphery circuit, and service it if defective.
Is the "L" pulse outputted into Pin(19) of IC2002?
Yes
Yes Yes No
No
No
FLOW CHART NO.11
EV+3.3V is not outputted.
Is 3.3V voltage supplied to emitter of Q1010?
Is the "L" pulse inputted to base of Q1012?
Check Q1010, Q1012, R1087 and R1088, and
service it if defective. Replace IC2002
.
Check the circuit between Pin(19)
of IC2002 and base of Q1012
,
and service it if defective.
Check D1030, D1048, C1035, C1048, L1009 and
the periphery circuit, and service it if defective.
Is the "L" pulse outputted into Pin(19) of IC2002?
Yes
Yes Yes No
No
No

15
15
DVD-910
Yes No
FLOW CHART NO.13
The key operation is not functioning.
Are the contact point and the installation state of the
key switches (SW2001, 6401-6414) normal?
When pressing each switches (SW6401-6403,
6405, 6407-6414), do the voltage of each pin
of IC2001 (shown below) switch to 75mV from
6mV?
SW6401-6403, 6405, 6407, 6413, 6414: IC2001 3PIN
SW6408-6412: IC2001 4PIN
When pressing each switches (SW2001, 6404,
6406), is the normal control voltage inputted to
Pin(8) of IC2001?
SW2001: 0 - 0.49V
SW6406: 0.49 - 1.49V
SW6404: 1.49 - 2.42V
Check the switches (
SW2001, 6401-6414 )
and their periphery, and service it if detective.
No Re-install the switches (
SW2001, 6401-6414 )
correctly or replace the poor switch.
Replace IC2001. Yes
Yes
Yes
Yes
Yes
No
No
No
No
FLOW CHART NO.12
The fluorescent display tube does not light up.
Is 3.3V voltage supplied to Pin(6) and
Pin(24) of IC2001?
Is the voltage of approximately -24V to -28V
supplied to Pin(15) of IC2001?
Is there 500kHz oscillation at Pin(26) of IC2001?
Are the filament voltage supplied between
Pins(1, 2) and Pins(34, 35) of the fluorescent
display tube? And the negative voltage applied
between these pins and GND?
Replace the fluorescent display tube.
Check the EV+3.3V line and service it if detective.
Check the -FL (-28V) line and service it if detective
.
Check R2015, IC2001 and their periphery, and
service it if detective.
Check PWRCON
line, and service
it if detective.
Is the "H" signal inputted
to base of Q1016?
Check D1016, D1017,T1001, and their periphery,
and service it if detective.
Is -17V voltage supplied to collector of Q1005?
No
Yes
YesNo
Check Q1015, Q1016, D1055, and
their periphery, and service it if detective.

16
16
DVD-910
FLOW CHART NO.17
[No Disc] indicated. (When the focus error occurs.)
Replace the DVD Main CBA.
No improvement can be found. Original DVD Main CBA is poor.
Replace the DVD Mecha.
No
Yes
Yes
FLOW CHART NO.16
The disc tray cannot be opened and closed.
Replace the DVD Main CBA.
Original DVD Main CBA is poor.
Replace the DVD Mecha.
No improvement can be found. No
Yes
FLOW CHART NO.15
The disc tray cannot be opened and closed. (It can be done using the remote control unit.)
Is the normal control voltage inputted to Pin(8) of
IC2002?
Refer to "FLOW CHART NO.16" <The disc tray
cannot be opened and closed.>
Replace the "OPEN/CLOSE" button (SW6406).
No
FLOW CHART NO.14
No operation is possible from the remote control unit.
Operation is possible from the DVD, but no
operation is possible from the remote control unit.
Replace the infrared remote control receiver (RM2001
).
Or replace the remote control unit.
Check the line between Pin(20) of IC2002 and
Pin(22) of CN1001, and service it if detective.
Is the "L" pulse sent out Pin(1) terminal of receiver
(RM2001) when the infrared remote control is activated?
Is the "L" pulse supplied to the Pin(22) of CN1001?
Replace DVD Main CBA.
Yes
Yes
Is 5V voltage supplied to the Pin(3) terminal of
the infrared remote control receiver (RM2001)?
Yes No
Check EV+5V line and service it if detective.
No
No
Yes
Replace IC2002.
Is the "L" pulse outputted to the Pin(20) of IC2002
when the infrared remote control is activated?
Yes No

17
17
DVD-910
FLOW CHART NO.20
Both functions of picture and sound do not operate normally.
Replace the DVD Main CBA.
Replace the DVD Mecha.
No
Yes
No improvement can be found. Original DVD Main CBA is poor.
FLOW CHART NO.18
[No Disc] indicated. (When the focus servo is not functioning.)
FLOW CHART NO.19
[No Disc] indicated. (When the laser beam does not light up.)
Replace the DVD Main CBA.
Replace the DVD Mecha.
No
Yes
Replace the DVD Main CBA.
Replace the DVD Mecha.
No
Yes
No improvement can be found. Original DVD Main CBA is poor.
No improvement can be found. Original DVD Main CBA is poor.
FLOW CHART NO.21
Picture does not appear normally.
Set the disc on the disc tray, and playback.
Are the video signals outputted to each pin (as shown
below) of CN1601 and CN6101 on the AV CBA?
Replace the DVD Main CBA or DVD Mecha.
No
No No
<Interlace mode>
CN1601 7PIN S-Y
CN1601 9PIN S-C
CN1601 5PIN Cb
CN1601 3PIN Cr
<Progressive mode>
CN6101 2PIN S-Y
CN6101 4PIN Pb
CN6101 6PIN Pr
Replace FFC cable.
Replace the DVD Main
CBA Unit or DVD Mecha
.
Replace Progressive
CBA Unit.
Replace FFC cable.
Is FFC cable (W6101) connecting CN6101 on the
AV CBA and Progressive CBA Unit normally?
Yes
Is FFC cable (W1801) connecting CN1801 on the
Progressive CBA Unit and DVD Main CBA Unit
normally?
Is component video signals outputted in interlace
mode?
Yes
Yes No
No
(continued to "A" on next page)

18
18
DVD-910
Check the line between each pin of IC6102 and
each pin of IC1402 on the AV CBA, and service it
if detective.
Is 5V voltage applied to the pin(1, 24) of
IC1402?
Replace IC1402. Check P-ON+5V line and
service it if detective.
IC6102 4PIN →IC1402 6PIN S-Y
IC6102 9PIN →IC1402 2PIN S-C
IC6102 15PIN →IC1402 9PIN Pb/Cb
IC6102 14PIN →IC1402 11PIN Pr/Cr
Are the video signals shown above inputted into
each pin of IC1402?
Are the video signals outputted to each pin
of IC1402?
Yes
Yes No
Yes
Yes
No
No
No
Are the video signals outputted to each pin of
IC6102?
IC6102 4PIN S-Y
IC6102 15PIN Pb/Cb
IC6102 14PIN Pr/Cr
IC1402 6PIN S-Y
IC1402 2PIN S-C
IC1402 9PIN Pb/Cb
IC1402 11PIN Pr/Cr
IC1402 21PIN CVBS
IC1402 18PIN S-Y
IC1402 23PIN S-C
IC1402 15PIN Pb/Cb
IC1402 13PIN Pr/Cr
Check the periphery of JK6102 from Pins (13, 15,
18) of IC1402 and service it if detective.
Check the periphery of JK6103 from Pin(21) of
IC1402
and service it if detective.
Check the periphery of JK1401 from
Pin (18) of IC1402 and service it if detective.
Check the periphery of JK1401 from
Pin (23) of IC1402 and service it if detective.
Are the video signals outputted to the specific
output terminal?
Are the component video signals outputted to the
VIDEO OUT terminal (JK6102)?
Are the luminance signals outputted to the
S-OUT terminal (JK1401)?
Are the chroma signals outputted to the
S-OUT terminal (JK1401)?
No
No
No
No
Are the composite video signals outputted to
the VIDEO OUT terminal (JK6103)?
Check P-ON+5V line an
d
service it if detective.
Replace IC6102.
Is 5V voltage supplied to Pin(16) of IC6102?
Yes No
Yes
A

19
19
DVD-910
FLOW CHART NO.22
Audio is not outputted.
Set the disc on the disc tray, and playback.
Are the analog audio signals outputted to each pin
of CN1601 on AV CBA?
Is the "H" level mute signal outputted to CN1601
on AV CBA ?
CN1601 13PIN AUDIO-L
CN1601 15PIN AUDIO-R
CN1601 12PIN A-MUTE
CN1601 16PIN A-R-MUTE
CN1601 14PIN A-L-MUTE
IC1201 7PIN AUDIO-L
IC1201 1PIN AUDIO-R
IC1201 6PIN AUDIO-L
IC1201 2PIN AUDIO-R
Replace the DVD Main CBA or DVD Mecha.
Replace the DVD Main CBA or DVD Mecha.
Replace IC1201.
Check the periphery between Pins(1,7) of IC1201
and JK6103, and service it if detective.
Check each line between each pin of CN1601
and each pin of IC1201 on AV CBA, and service it
if detective.
CN1601 13PIN →IC1201 6PIN AUDIO-L
CN1601 15PIN →IC1201 2PIN AUDIO-R
Are the analog audio signals inputted to each pin
of IC1201.
Are the analog audio signals inputted to each pin
of IC1201?
Are the audio signals outputted to the specific
output terminal?
Are the audio signals outputted to the audio
terminal (JK6103)?
Yes
Yes
Yes
Yes
No
No
No
No
No

20
20
DVD-910
System Control/Servo Block Diagram
59
27
7
8
4
15
10
14
26
1
2
3
4
6
23
5
17
18
12
11
14
13
15
16 25
24
FP-STB 54FP-DIN 55
FP-DOUT
61
REMOTE 53
FP-CLK
CN401 CN1001 2
28
27
1
REMOTE
SENSOR
RM2001
1G
7G
~
FP-STB
FP-DIN
FP-DOUT
FP-CLK
K1
K2
REMOTE-OUT
GRID FIP
SEGMENT
FL2001
IC2001
DVD MAIN CBA UNIT AV CBA
DRIVE CBA
(FRONT PANEL CONTROL)
IC2002
ENERGY STAR
MICROCONTROLLER
IC301
(SERVO DRIVE)
IC451
(CLOCK GENERATOR)
IC905
(INVERTER)
BLOCK DIAGRAMS
20
REMOTE-IN
13
PWRCON
PWRCON
PWSW
AD-KEY
PWSW
18
8
19
47
PWRCON
KEY
SWITCH
IC202
(OP AMP)
12 14
CN301
FG CBA
FG
SENSOR
M
SLED
MOTOR
M
SPINDLE
MOTOR
IC101
(MICRO CONTROLLER)
+
- +
-
+
-
+
-
+
-
+
-
+
-
SLED
MOTOR
DRIVE
FOCUS
ACTUATOR
DRIVE
1/8
1/4 PLL2
X451
MULTI
PLL X'TAL OSC 36.864MHz OSC
SPINDLE
MOTOR
DRIVE
TRACKING
ACTUATOR
DRIVE
EXT CLOCK
CLK33M
BE CLOCK
172
170
150
TRAY-OUT
TRAY-IN
FG-IN
97
SLD
70
SPDL
71
TRACKING
DRIVE
152
FOCUS
DRIVE
60
66
TO DIGITAL SIGNAL
PROCESS BLOCK
DIAGRAM
TO DIGITAL SIGNAL
PROCESS BLOCK
DIAGRAM
FS(+)
FS(-)
TS(+)
TS(-)
FROM/TO
VIDEO/ AUDIO
BLOCK DIAGRAM 51
ADAC-MD
50 ADAC-MC
87 ADAC-ML
ADAC-MC
ADAC-ML
PCM-SCLK
CLK27M
86
A-MUTE
ADAC-MD
A-MUTE
17
92
FSEL
RESET68
RESET
IC461
5 4
+3.3V
TRAY-OUT
TRAY-IN
FOCUS SERVO SIGNAL TRACKING SERVO SIGNAL SLED SERVO SIGNAL SPINDLE SERVO SIGNAL
3SP(+) 4SP(-) 5TRAY-OUT 6TRAY-IN 7GND 8SL(-) 9SL(+) 1FG-IN
JP2001
Q2007
JP2002
FUNCTION
CBA
16 FP-STB 16
18 FP-DIN 18
20 FP-DOUT 20
21 FP-CLK 21
22 REMOTE 22
19 PWRCON 19
5K2 5
8K1 8
3 KEY-1 3
2 KEY-2 2
4 KEY-3 4
6 KEY-4 6
12 KEY-5 12
11 KEY-6 11
9 KEY-7 9
7 KEY-8 7
1 AD-KEY 1
TO POWER SUPPLY
BLOCK DIAGRAM
85 I/P-SW
I/P-SW
24
12
7
8
9
10
11
13
14
16
23
17
~
a/KEY-1
b/KEY-2
c/KEY-3
d/KEY-4
e/KEY-5
f/KEY-6
g/KEY-7
h/KEY-8
i
3
4
JP2050 JP2001
SWITCH CBA
AD-KEY 11 GND 33
STANDBY-LED 22
POWER
SW2001
Q2002
D2004
STANDBY
+5V
P-ON+5V