Denon DVM-2815 Service Manual
SERVICE MANUAL
For U.S.A. & Canada model
Ver. 2
MODEL
DVM-2815
DVD AUDIO-VIDEO AUTO CHANGER
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。
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, BUNKYO-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。
X0186V.02 DE/CDM 0308
8年です。
DVM-2815
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. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
BLOCK DIAGRAMS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
SCHEMATIC DIAGRAMS / CBA’S AND TEST POINTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
WAVEFORMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
WIRING DIAGRAMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
FIRMWARE RENEWAL MODE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
LEAD IDENTIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
EXPLODED VIEWS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
PARTS LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Manufactured under license from Dolby Laboratories. "Dolby"
and the double-D symbol are trademarks of Dolby Laboratories.
2
DVM-2815
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 4~22kHz dB ± 0.5
CD fs=44.1kHz 4~20 kHz dB ± 0.5
3-4. THD+N
DVD 1 kHz 0dB % 0.025
CD 1 kHz 0dB % 0.03
3
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
DVM-2815
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
DVM-2815
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 crea te sh ock, fir e, and /or ot her
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 loca tions.
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 rep lacing the tra nsfo rmer,
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
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 surr ounding metallic parts. (See Fig. 1)
Table 1: Ratings for selected area
AC Line Voltage Clearance Distance (d) (d’)
DVM-2815
Chassis or Secondary Conducto
Primary Circuit Terminals
dd'
6
120 V
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 voltmeter to measure across the terminals of load
Z. See Fig. 2 and the following table.
Table 2: Leakage current ratings for selected areas
AC Line Voltage Load Z Leakage Current (i) Earth Ground (B) to:
120 V
≥ 3.2mm (0.126 inches)
0.15µF CAP. & 1.5kΩ RES.
Connected in parallel
Exposed Accessible Part
Z
1.5k
i≤0.5mA Peak Exposed accessible parts
0.15 F
Earth Ground
B
Power Cord Plug Prongs
AC Voltmeter
(High Impedanc
Fig. 1
Fig. 2
Note: This table is unofficial and for reference only. Be sure to confirm the precise values.
6
DVM-2815
O
P
P
STANDARD NOTES FOR SERVICING
7
Circuit Board Indications
1. The output pin of the 3 pin Regulator ICs is indicated as shown.
Top View
Input
ut
2. For other ICs, pin 1 and every fifth pin are indicated
as shown.
In
in 1
3. 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)
(4) 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
DVM-2815
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
Sha
Pin
ine Tip
oldering Iron
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
To Solid
Mounting Point
CBA
Tweezers
Soldering Iron
Fig. S-1-5
Fine Tip
Soldering Iro
Flat Pack-IC
Fig. S-1-6
8
DVM-2815
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
(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 grounding band, be careful to avoid contacting semi-conductors with your clothing.
< Incorrect >
CBA
Presolder
Flat Pack-IC
Fig. S-1-8
CBA
< Correct >
Grounding Ban
1MΩ
CBA
1MΩ
Conductive Sheet or
Copper Plate
9
DVM-2815
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
[7] Power SW
CBA
[8] Relay CBA
[9] Sensor CBA
[13] Loading
Pulley
[14] Slide Tray
Gear (B)
[15] Slide Tray
Gear (A)
[16] Motor
Assembly
[17] Switch CBA
[18] Tray
Guide (R)
[6] Function CBA
[22] Progressive CBA Unit
[2] Front Assembly
[3] Bracket (Top)
[4] Stopper Bracket L, R
[5] Drive Mecha
Assembly
[10] Rear Panel
[11] Tray Guide (L)
[12] Tray Guide
(R) Unit
[19] Changer CBA
[20] AV CBA
[21] Shield Plate
[23] DVD Main CBA Unit
[24] DVD Audio CBA
[25] PCB Holder
2. Disassembly Method
ID/
LOC.
No.
PART
Fig.
No.
[1] Top Cover D1 6(S-1) -
Front
[2]
[3]
Assembly
Bracket
(Top)
D2 2(S-2), *8(L-1) 1-1
D3 *2(L-2) -
Stopper
[4]
Bracket
D3 4(S-3) -
L, R
REMOVAL
REMOVE/*UNHOOK/
UNLOCK/RELEASE/
UNPLUG/DESOLDER
Note
ID/
LOC.
No.
Drive Mecha
[5]
Assembly
PART
REMOVE/*UNHOOK/
Fig.
UNLOCK/RELEASE/
No.
UNPLUG/DESOLDER
D4,
CN201, CN3001
D5
[6] Function CBA D4 *2(L-3), CN2201 -
REMOVAL
Power SW
[7]
CBA
[8] Relay CBA D6
Sensor
[9]
CBA
D4 CN2103, (S-4) -
2(S-5), CN5002,
CN5003, CN5005
D6 2(S-6) -
[10] Rear Panel D7 4(S-7), 13(S-8) -
Tray
[1 1]
Guide (L)
Tray
[12]
Guide (R)
Unit
Loading
[13]
Pulley
Slide Tray
[14]
Gear (B)
Slide Tray
[15]
Gear (A)
Motor
[16]
Assembly
Switch
[17]
CBA
Tray
[18]
Guide (R)
[19] Changer CBA D10
D8 3(S-9) -
4(S-10), CN3003,
D8
CN3004
D9 (S-11), Belt L -
D9 (S-12), *(P-1) -
D9 ---------- -
D9 (S-13) -
D9 *2(L-4) -
D9 ---------- -
CN3102, 2(S-14),
CN3301
6(S-15), CN1601,
[20] AV CBA D10
CN1602, CN1603,
CN1001, FFC
Clamper
[21] Shield Plate D11 2(S-16), 2(W-1) -
Progressive
[22]
[23]
[24]
CBA Unit
DVD Main
CBA Unit
DVD Audio
CBA
D11 CN1801 -
D11 2(S-17), CN901 -
D11 (S-18) -
[25] PCB Holder D11 (S-19) -
↓
(1)
↓
(2)
↓
(3)
↓
(4)
Note
2
2-1
3
4
-
-
-
-
↓
(5)
10
(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. Short the three short lands of FPC cable with sol-
der before removing the FFC cable (CN201) fro m
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 complete ly. 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-2)
(L-1)
[2] Front Assembly
[4] Stopper Bracket L
(L-2)
(L-1)
(S-3)
(B)
(L-1)
(A)
DVM-2815
(S-2)
[3] Bracket (Top)
[4] Stopper Bracket R
(L-2)
(L-1)
(B)
(L-1)
(S-3)
Fig. D2
Fig. D3
[5] Drive Mecha
Assembly
11
(S-3)
(S-1)
(S-1)
[1] T op Cover
(S-1)
(S-1)
Fig. D1
CN2103
(S-4)
[7] Power
SW CBA
CN2201
(L-3)
CN3001
Turn
(L-3)
[6] Function CBA
CN201
Slide Tray
Gear (B)
Fig. D4
11
DVM-2815
)
12
Slide
A
Short the three short lands by soldering
B
Drive Mecha
Assembly
View for A
OR
Short the three short
lands by soldering
C
[9] Sensor CBA
[10] Rear Panel
(S-6)
CN5005
(S-7)
(S-8)
(S-5)
(S-7)
CN5003
CN5002
[8] Relay
CBA
Fig. D6
(S-8)
(S-7)
(S-8
(S-7)
Pickup Unit
View for B
View for C
Fig. D5
Fig. D7
12
DVM-2815
A
13
(S-9)
CN3003
CN3004
[11] Tray Guide (L)
[12] Tray Guide
(R) Unit
(S-10)
Fig. D8
CN3102
(S-14)
(S-15)
CN3301
CN1001
[19] Changer CBA
[21] Shield Plate
FFC
Clamper
(S-15)
(S-14)
CN1602
(S-15)
CN1603
CN1601
[20] AV CBA
Fig. D10
[14] Slide Tray Gear (B)
[15] Slide Tray Gear (A)
(S-11)
Belt L
[13] Loading
Pulley
(S-13)
(S-12)
(P-1)
[17] Switch CBA
[18] Tray
Guide (R)
(L-4)
[16] Motor Assembly
Fig. D9
[22]
Progressive
CBA Unit
(S-16)
(W-1)
[24]
DVD
Audio CBA
CN1801
(S-18)
(S-17)
(S-19)
[25] PCB
Holder
(S-16)
[23]
Main CB
Unit
CN901
DVD
13
Fig. D11
,
FLOW CHART NO.1
.
t
The power cannot be turned on.
TROUBLESHOOTING
DVM-2815
14
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 (SW2201), is the
voltage of 0V supplied to pin(38) of IC3001?
Yes
Is the voltage of 3.3V supplied to pin(1) of IC3001?
Yes
Is the voltage of 3.3V outputted to pin(19) of CN1001?
Yes
Replace IC3001.
FLOW CHART NO.2
The fuse blows out.
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 CHG+5V line
See FLOW CHART No.2 <The fuse blows out.>
Replace DVD Main CBA unit.
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 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.
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 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
Check D1003 and periphery circuit, and service it
if defective.
14
.
FLOW CHART NO.6
.
.
P-ON+9V (EV+9V) is not outputted.
DVM-2815
15
Is 9V voltage supplied to the emitter of Q1002?
Yes
Is the voltage of base on Q1002 lower than the
voltage of emitter on Q1002 when turning the power on?
Yes
Replace Q1002.
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?
Yes
Replace Q1004.
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?
Yes
Replace Q1011 and R1067.
No
No
No
No
Check D1030, C1035, C1048, L1009 and
the periphery circuit, and service it if defective.
Check Q1016 and service it if defective.
Check R1068 and D1046, and service it if defective
Check D1008, D1015, C1007, C1038, L1007 and
the periphery circuit, and service it if defective.
FLOW CHART NO.9
EV+5V is not outputted.
Is EV+9V outputted normally?
Yes
Check Q1014, D1047 and the periphery circuit,
and service it if defective.
FLOW CHART NO.10
EV+1.5V is not outputted.
Is 2.5V voltage supplied to Pin(1) of IC1002?
Yes
Is 1.25V voltage supplied to Pin(4) of IC1002?
Yes
Replace IC1002.
FLOW CHART NO.11
EV+3.3V is not outputted.
Is 3.3V voltage supplied to emitter of Q1010?
Yes
Is the "L" pulse inputted to base of Q1012?
Yes
Check Q1010, Q1012, R1087 and R1088, and
service it if defective.
No
No
No
No
No
Refer to "FLOW CHART NO.6"
<P-ON+9V (EV+9V) is not outputted.>
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 No
Check the circuit between Pin(18)
of IC3001 and Pin(4) of IC1002
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 No
Check the circuit between Pin(18)
of IC3001 and base of Q1012
and service it if defective.
Replace IC3001
,
Replace IC3001
,
15
FLOW CHART NO.12
e.
.
SW2213
SW2209
The fluorescent display tube does not light up.
DVM-2815
16
Is 3.3V voltage supplied to Pin(6) and
Pin(24) of IC2001?
Yes
Is the voltage of approximately -24V to -28V
supplied to Pin(15) of IC2001?
Yes
Is there 500kHz oscillation at Pin(26) of IC2001?
Yes
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?
Yes
Replace the fluorescent display tube.
FLOW CHART NO.13
The key operation is not functioning.
No
No
No
No
Check the P-ON+3.3V line and service it if defectiv
Check the -FL (-28V) line and service it if defective
Check R2015, IC2001 and their periphery, and
service it if defective.
Check D1016, D1017, T1001, and their periphery,
and service it if defective.
No
Is -17V voltage supplied to collector of Q1005?
Yes
Is the "H" signal inputted
to base of Q1016?
Check the EV+3.3V
line, and service
No
it if defective.
Yes
Check Q1015, Q1016, D1055, and
their periphery, and service it if defective.
Are the contact point and the installation state of the
key switches (SW2201 - 2214) normal?
Terminal Voltage of Pins (38 - 42) on IC3001
0.00 - 0.50
0.51 - 1.53
1.54 - 2.57
2.58 - 3.30 (KEY OFF) (KEY OFF) (KEY OFF) (KEY OFF) (KEY OFF)
Yes
Is the control voltage normally supplied to pins(38,
39, 40, 41, 42) of IC3001?
Yes
Replace IC3001.
No
Re-install the switches (
SW2201 - 2214
correctly or replace the poor switch.
IC3001
38pin 39pin 40pin 41pin 42pin
KEY1 KEY2 KEY3 KEY4 KEY5
SW2201
POWER
SW2202
STOP
SW2203
PLAY
No
SW2204
SKIP DOWN
SW2205
SKIP UP
SW2206
SELECT
SW2207
DISC-5
SW2208
DISC-4
OPEN/CLOSE
Check the switches (
SW2210
DISC-3
SW2211
DISC-2
SW2212
DISC-1
SW2201 - 2214
and their periphery, and service it if defective.
)
STILL/PAUSE
EXTRA
-----
)
16
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