Denon DVM-1815 User manual
SERVICE MANUAL
MODEL
DVM-1815
DVD VIDEO AUTO CHANGER
For U.S.A. & Canada model
16-11, YUSHIMA 3-CHOME, BUNKYOU-KU, TOKYO 113-0034 JAPAN
X0183V.01 DE/CDM 0307
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
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TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
http://www.xiaoyu163.com
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2
2
DVM-1815
TABLE OF CONTENTS
SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
LASER BEAM SAFETY PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
IMPORTANT SAFETY PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
STANDARD NOTES FOR SERVICING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
CABINET DISASSEMBLY INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
TROUBLESHOOTING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
BLOCK DIAGRAMS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
SCHEMATIC DIAGRAMS / CBA’S AND TEST POINTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
WAVEFORMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
WIRING DIAGRAMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
FIRMWARE RENEWAL MODE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
LEAD IDENTIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
EXPLODED VIEWS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
PARTS LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Manufactured under license from Dolby Laboratories. "Dolby"
and the double-D symbol are trademarks of Dolby Laboratories.
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TEL 13942296513 QQ 376315150 892498299
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DVM-1815
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 % 0.025
CD 1 kHz 0dB % 0.03
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TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
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DVM-1815
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
hazardous 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.
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TEL 13942296513 QQ 376315150 892498299
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DVM-1815
IMPORTANT SAFETY PRE-
CAUTIONS
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
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 contin-
uously 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 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 solder-
ing.
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
droplets, 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 pre-
vent 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.
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TEL 13942296513 QQ 376315150 892498299
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DVM-1815
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
standards.
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 termi-
nals, 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.
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
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TEL 13942296513 QQ 376315150 892498299
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DVM-1815
STANDARD NOTES FOR SERVICING
Circuit Board Indications
1. The output pin of the 3 pin Regulator ICs is indi-
cated as shown.
2. For other ICs, pin 1 and every fifth pin are indicated
as shown.
3. 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)
(4) 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
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TEL 13942296513 QQ 376315150 892498299
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DVM-1815
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
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TEL 13942296513 QQ 376315150 892498299
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9
DVM-1815
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
(1) 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 ground-
ing band, be careful to avoid contacting semi-con-
ductors 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 >
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TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
http://www.xiaoyu163.com
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10
10
DVM-1815
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
ID/
LOC.
No.
PART
REMOVAL
Fig.
No.
REMOVE/*UNHOOK/
UNLOCK/RELEASE/
UNPLUG/DESOLDER
Note
[1] Top Cover D1 6(S-1) -
[2] Front
Assembly D2 2(S-2), *8(L-1) 1-1
[3] Bracket
(Top) D3 *2(L-2) -
[4]
Stopper
Bracket
L, R
D3 4(S-3) -
[5] Drive Mecha
Assembly
D4,
D5 CN201, CN3001
2
2-1
2-2
3
4
[1] Top Cover
[2] Front Assembly
[3] Bracket (Top)
[4] Stopper Bracket L, R
[5] Drive Mecha
Assembly
[12] Tray Guide
(R) Unit
[19] Changer CBA
[23] DVD Main CBA Unit
[20] AV CBA
[24] PCB Holder
[13] Loading
Pulley
[8] Relay CBA
[6] Function CBA
[9] Sensor CBA
[14] Slide Tray
Gear (B)
[15] Slide Tray
Gear (A)
[16] Motor
Assembly
[17] Switch CBA
[18] Tray
Guide (R)
[7] Power SW
CBA
[21] Shield Plate
[22] Progressive CBA Unit
[10] Rear Panel
[11] Tray Guide (L)
[6] Function CBA D4 *2(L-3), CN2201 -
[7] Power SW
CBA D4 CN2103, (S-4) -
[8] Relay CBA D6
2(S-5), CN5001,
CN5002, CN5003,
CN5005
-
[9] Sensor
CBA D6 2(S-6) -
[10] Rear Panel D7 4(S-7), 11(S-8) -
[11] Tray
Guide (L) D8 3(S-9) -
[12]
Tray
Guide (R)
Unit
D8 4(S-10), CN3003,
CN3004 -
[13] Loading
Pulley D9 (S-11), Belt L -
[14] Slide Tray
Gear (B) D9 (S-12), *(P-1) -
[15] Slide Tray
Gear (A) D9 ---------- -
[16] Motor
Assembly D9 (S-13) -
[17] Switch
CBA D9 *2(L-4) -
[18] Tray
Guide (R) D9 ---------- -
[19] Changer CBA D10 CN3102, 2(S-14),
CN3301 -
[20] AV CBA D10
6(S-15), CN1601,
CN1602, CN1001,
FFC Clamper
-
[21] Shield Plate D11 2(S-16), 2(W-1) -
[22] Progressive
CBA Unit D11 CN1801 -
[23] DVD Main
CBA Unit D11 2(S-17) -
[24] PCB Holder D11 (S-18) -
↓
(1)
↓
(2)
↓
(3)
↓
(4)
↓
(5)
ID/
LOC.
No.
PART
REMOVAL
Fig.
No.
REMOVE/*UNHOOK/
UNLOCK/RELEASE/
UNPLUG/DESOLDER
Note
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TEL 13942296513 QQ 376315150 892498299
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11
11
DVM-1815
(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) are fragile. Be careful
not to break them.
1-1. To release eight Locking Tabs (L-1), first release
five Locking Tabs (A), and then three Locking
Tabs (B). (Fig. D2)
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 next 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)
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)
CAUTION 4: Before reinstalling, turn the Slide Tray
Gear (B) fully clockwise. (Fig. D4)
(S-1)
(S-1)
(S-1)
[1] Top Cover
(S-1)
Fig. D1
[2] Front Assembly (L-1)
(A)
(B)
(B)
(L-1)
(L-1)
(S-2)
(L-1)
(L-1)
(S-2)
Fig. D2
[3] Bracket (Top)
[4] Stopper Bracket R
[4] Stopper Bracket L
(L-2)
(L-2)
(S-3)
(S-3)
(S-3)
Fig. D3
Slide Tray
Gear (B)
CN201
CN3001
CN2201 [6] Function CBA
(L-3)
(L-3)
(S-4)
[7] Power
SW CBA
CN2103
[5] Drive Mecha
Assembly
Turn
Fig. D4
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12
12
DVM-1815
View for B
Pickup Unit
C
B
Short the three short
lands by soldering
View for C
Slide
View for A
OR
Short the three short lands by soldering
Drive Mecha
Assembly
A
Fig. D5
[8] Relay
CBA
[9] Sensor CBA
(S-6)
CN5002
CN5005
(S-5)
CN5003
CN5001
Fig. D6
(S-7)
(S-7)
(S-7)
(S-7)
(S-8)
(S-8)
(S-8
)
[10] Rear Panel
Fig. D7
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TEL 13942296513 QQ 376315150 892498299
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13
13
DVM-1815
(S-9)
[12] Tray Guide
(R) Unit
[11] Tray Guide (L)
CN3004
CN3003
(S-10)
Fig. D8
(S-11)
Belt L
[13] Loading
Pulley
[14] Slide Tray Gear (B)
[16] Motor Assembly
[17] Switch CBA
(S-13)
(L-4)
[15] Slide Tray Gear (A)
[18] Tray
Guide (R)
(P-1)
(S-12)
Fig. D9
CN3102
CN3301
[20] AV CBA
[19] Changer CBA
(S-15)
(S-15)
(S-15) FFC
Clamper
(S-14)
(S-14) CN1601
CN1001 CN1602
Fig. D10
(S-16)
(S-17)
(S-16)
(W-1)
(S-18)
[21] Shield Plate
[24] PCB
Holder
CN1801
[23]
DVD Ma
in
CBA Unit
[22]
Progressive
CBA Unit
Fig. D11
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TEL 13942296513 QQ 376315150 892498299
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14
14
DVM-1815
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 AV 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 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 3.3V supplied to pin(1) of IC3001?
Is the voltage of 3.3V outputted to pin(19) of CN1001?
Yes
When pressing POWER button (SW2201), is the
voltage of 0V supplied to pin(38) of IC3001?
Yes
Yes
Replace IC3001. Yes
No
No
No
No
Check POWER button (SW2001) and their
periphery, and service it if defective.
No
Check CHG+5V line
and service it if defective.
See FLOW CHART No.2 <The fuse blows out.>
No
Replace DVD Main CBA unit.
No
TROUBLESHOOTING
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TEL 13942296513 QQ 376315150 892498299
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15
15
DVM-1815
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, C1035, C1048, L1009 and
the periphery circuit, and service it if defective.
Check Q1016 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 IC3001
.
Check the circuit between Pin(18)
of IC3001 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(18) of IC3001?
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 IC3001
.
Check the circuit between Pin(18)
of IC3001 and base of Q1012
,
and service it if defective.
Check D1008, D1015, C1007, C1038, L1007 and
the periphery circuit, and service it if defective.
Is the "L" pulse outputted into Pin(18) of IC3001?
Yes
Yes Yes No
No
No
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TEL 13942296513 QQ 376315150 892498299
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16
16
DVM-1815
Yes No
FLOW CHART NO.13
The key operation is not functioning.
Are the contact point and the installation state of the
key switches (SW2201 - 2214) normal?
Is the control voltage normally supplied to pins(38,
39, 40, 41, 42) of IC3001? Check the switches (
SW2201 - 2214
)
and their periphery, and service it if defective.
No Re-install the switches (
SW2201 - 2214
)
correctly or replace the poor switch.
Replace IC3001. 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 P-ON+3.3V line and service it if defectiv
e.
Check the -FL (-28V) line and service it if defective
.
Check R2015, IC2001 and their periphery, and
service it if defective.
Check the EV+3.3V
line, and service
it if defective.
Is the "H" signal inputted
to base of Q1016?
Check D1016, D1017,T1001, and their periphery,
and service it if defective.
Is -17V voltage supplied to collector of Q1005?
No
Yes
Yes
No
Check Q1015, Q1016, D1055, and
their periphery, and service it if defective.
38pin 39pin 40pin 41pin 42pin
KEY1 KEY2 KEY3 KEY4 KEY5
0.00 - 0.50 SW2201
POWER SW2204
SKIP DOWN SW2207
DISC-5 SW2210
DISC-3
SW2213
STILL/PAUSE
0.51 - 1.53 SW2202
STOP SW2205
SKIP UP SW2208
DISC-4 SW2211
DISC-2
SW2214
EXTRA
CHANGE
1.54 - 2.57 SW2203
PLAY SW2206
SELECT
SW2209
OPEN/CLOSE SW2212
DISC-1 -----
2.58 - 3.30 (KEY OFF) (KEY OFF) (KEY OFF) (KEY OFF) (KEY OFF)
IC3001
Terminal Voltage of Pins (38 - 42) on IC3001
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TEL 13942296513 QQ 376315150 892498299
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17
17
DVM-1815
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(40) of
IC3001?
Refer to "FLOW CHART NO.16" <The disc tray
cannot be opened and closed.>
Replace the "OPEN/CLOSE" button (SW2209).
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 defective.
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 P-ON+5V line and service it if defective.
No
No
Yes
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TEL 13942296513 QQ 376315150 892498299
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18
18
DVM-1815
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 CN1602 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>
CN1602 2PIN S-Y
CN1602 4PIN Pb
CN1602 6PIN Pr
Replace FFC cable.
Replace the DVD Main
CBA Unit or DVD Mecha
.
Replace Progressive
CBA Unit.
Replace FFC cable.
Is FFC cable (W1802) connecting CN6102 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)
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TEL 13942296513 QQ 376315150 892498299
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19
19
DVM-1815
Check the line between each pin of IC6102 and
each pin of IC1402 on the AV CBA, and service it
if defective.
Is 5V voltage applied to the pin(1, 24) of
IC1402?
Replace IC1402. Check P-ON+5V line and
service it if defective.
IC6102 4PIN →IC1402 6PIN S-Y
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
Yes
No
No
Check the line between pin(9) of CN1601 and
pin(2) of IC1402 on the AV CBA, and service it
if defective.
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 9PIN Pb/Cb
IC1402 11PIN Pr/Cr
Are the video signals shown above inputted into
pin(2) of IC1402?
IC1402 21PIN CVBS
IC1402 18PIN S-Y
IC1402 23PIN S-C
IC1402 15PIN Pb/Cb
IC1402 13PIN Pr/Cr
Check the periphery of JK1403 from Pins (13, 15,
18) of IC1402 and service it if defective.
Check the periphery of JK1401 from
Pin (18) of IC1402 and service it if defective.
Check the periphery of JK1401 from
Pin (23) of IC1402 and service it if defective.
Are the video signals outputted to the specific
output terminal?
Are the component video signals outputted to the
VIDEO OUT terminal (JK1403)?
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
Check P-ON+5V line an
d
service it if defective.
Replace IC6102.
Is 5V voltage supplied to Pin(16) of IC6102?
Yes No
Yes
A
w
w
w
.
x
i
a
o
y
u
1
6
3
.
c
o
m
Q
Q
3
7
6
3
1
5
1
5
0
9
9
2
8
9
4
2
9
8
T
E
L
1
3
9
4
2
2
9
6
5
1
3
9
9
2
8
9
4
2
9
8
0
5
1
5
1
3
6
7
3
Q
Q
TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com
20
20
DVM-1815
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 1PIN AUDIO-L
IC1201 7PIN AUDIO-R
IC1201 2PIN AUDIO-L
IC1201 6PIN 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 JK1201, and service it if defective.
Check each line between each pin of CN1601
and each pin of IC1201 on AV CBA, and service it
if defective.
CN1601 13PIN →IC1201 2PIN AUDIO-L
CN1601 15PIN →IC1201 6PIN 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 (JK1201)?
Yes
Yes
Yes
Yes
No
No
No
No
No
w
w
w
.
x
i
a
o
y
u
1
6
3
.
c
o
m
Q
Q
3
7
6
3
1
5
1
5
0
9
9
2
8
9
4
2
9
8
T
E
L
1
3
9
4
2
2
9
6
5
1
3
9
9
2
8
9
4
2
9
8
0
5
1
5
1
3
6
7
3
Q
Q
TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com
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