Mitsubishi Electric DD-5000 User manual

MITSUBISHI DIGITAL ELECTRONICS AMERICA, INC.
9351 Jeronimo Rd. Irvine, CA 92618
Copyright © 2000 Mitsubishi Digital Electronics America, Inc.
All Rights Reserved
Operating conditions: Temperature: 5 °C to 35°C
Operation status: Horizontal
Video output: 1.0 V (p-p), 75Ω, negative
sync., pin jack x 1
S Video output: (Y) 1.0 V (p-p), 75Ω, nega-
tive sync., Mini DIN 4-pin x 1
(C) 0.286 V (p-p), 75Ω
Color Difference output: (Y) 1.0 V (p-p), 75Ω, nega-
tive sync., pin jack x 1
(Cr)/(Cb) 0.7 V (p-p), 75Ω, pin
jack x 2
Digital Audio output: (Bitstream/PCM) 0.5 V (p-p),
75Ω, pin jack x 1,
Optical connector x 1
Analog Audio output: 2.0 V (rms), 330Ω, pin jack
2 CH L R x 2,
5.1 CH SURROUND x 6
CAUTION
Before servicing this chassis, it is important that the service person reads all SAFETY PRECAUTIONS and the
SAFETY NOTICE in this manual.
SPECIFICATIONS
Power Supply: 120V AC, 60 Hz
Power Consumption: 19W
Weight: 6.7 lb.
External Dimensions: 17"x 3-1/4"x12-1/4"
(W/H/D)
Signal System: Standard NTSC
Laser: Semiconductor laser,
wavelength 650 nm
Frequency Range: (Digital Audio)
Audio CD: 4 Hz to 20 kHz
DVD Linear -
48 kHZ Sampling: 4 Hz to 22 kHz
96 kHZ Sampling: 4 Hz to 44 kHz
Signal-To-Noise Ratio: More than 112 dB (EIAJ)
Audio Dynamic Range: More than 106 dB (EIAJ)
Harmonic Distortion: Less than 0.001%
Wow and flutter: Below measurable level
(less than ± 0.001%
(W.PEAK)) (EIAJ)
SerSer
SerSer
Servicevice
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ManualManual
ManualManual
Manual
2000
MITSUBISH ELECTRIC
Model
DD-5000
DVD Player
OPEN/CLOSE
STOP PLAY PAUSE/STEP
POWER
DD-5000
STANDBY
SKIP
REV FWD
/
CDVD
TITLE TRK CHP TOTAL REMAIN MEMORY
HDCD

LASER BEAM CAUTION LABEL
When the power supply is on, do not remove this laser caution label. If it is removed, laser radiation may be recceived.
The lightning flash with arrowhead symbol, within an
equilateral triangle, is intended to alert the user to the
presence of uninsulated “dangerous voltage” within the
product’s enclosure that may be of sufficient magnitude to
constitute a risk of electric shock to persons.
The exclamation point within an equilateral triangle is
intended to alert the user to the presence of important
operating and maintenance (servicing) instructions in the
literature accompanying the appliance.
SAFETY NOTICE

SAFETY PRECAUTIONS
LEAKAGE CURRENT CHECK
Plug the AC line cord directly into a 120V AC outlet (do
not use an isolation transformer for this check). Use an
AC voltmeter, having 5000 Ωper volt or more sensitivity.
Connect a 1500 Ω10 W resistor, paralleled by a 0.15 µF
150V AC capacitor between a known good earth ground
(water pipe, conduit, etc.) and all exposed metal parts of
the cabinet (antennas, handle bracket, metal cabinet
screwheads, metal overlays, control shafts, etc.).
Measure the AC voltage across the 1500 Ωresistor.
The test must be conducted with the AC switch on and
then repeated with the AC switch off. The AC voltage
indicated by the meter may not exceed 0.3 V. A reading
exceeding 0.3 V indicates that a dangerous potential
exists, the fault must be located and corrected.
Repeat the above test with the DVD VIDEO PLAYER
power plug reversed.
NEVER RETURN A DVD VIDEO PLAYER TO THE
CUSTOMER WITHOUT TAKING NECESSARY
CORRECTIVE ACTION.
READING SHOULD NOT EXCEED 0.3V
DVD VIDEO PLAYER
AC VOLTMETER
(5000 W per volt
or more sensitivity)
Good earth ground
such as a water pipe,
conduit, etc.
1500 W
10 W
0.15 µF 150V AC
AC OUTLET
Test all exposed metal.
Voltmeter Hook-up for Leakage Current Check

SECTION 2
PART REPLACEMENT AND ADJUSTMENT PROCEDURES
SECTION 3
SERVICING DIAGRAMS
1. STANDING PC BOARDS FOR SERVICING ......................... 3-1
2. CIRCUIT SYMBOLS AND
SUPPLEMENTARY EXPLANATION ..................................... 3-2
2-1. Precautions for Part Replacement .................................... 3-2
2-2. Solid Resistor Indication .................................................... 3-2
2-3. Capacitance Indication ....................................................... 3-2
2-4. Inductor Indication ............................................................. 3-3
2-5. Waveform and Voltage Measurement .............................. 3-3
2-6. When Replaced ROM ICs or Upgraded Firmware ........ 3-4
3. PRINTED WIRING BOARD AND
SCHEMATIC DIAGRAM .......................................................... 3-5
4. BLOCK DIAGRAMS .................................................................. 3-7
4-1. Overall Block Diagram ...................................................... 3-7
4-2. Power Supply Block Diagram ........................................... 3-9
4-3. Front Display, Power Switch Block Diagram ................ 3-10
4-4. Main Block Diagrams ....................................................... 3-13
4-5. Output Block Diagram ..................................................... 3-17
5. CIRCUIT DIAGRAMS ............................................................. 3-18
5-1. Power Supply Circuit Diagram ....................................... 3-18
5-2. Front Display, Power Switch Circuit Diagram .............. 3-21
5-3. Main Circuit Diagram ...................................................... 3-24
5-4. Output Circuit Diagram ................................................... 3-41
5-5. Motor System Circuit Diagrams ..................................... 3-47
6. PC BOARDS .............................................................................. 3-49
6-1. Power Supply PC Board ................................................... 3-49
6-2. Main PC Board ................................................................. 3-50
6-3. Output PC Board .............................................................. 3-55
CONTENTS
SECTION 1
GENERAL DESCRIPTIONS
1. PREPARATION FOR SERVICING ......................................... 1-1
2. LOCATION OF MAIN PARTS AND
MECHANISM PARTS ............................................................... 1-2
2-1. Location of Main Parts ....................................................... 1-2
2-2. Location of Mechanism Parts ............................................ 1-3
1. REPLACEMENT OF MECHANICAL PARTS ...................... 2-1
1-1. Cabinet Replacement .......................................................... 2-1
1-1-1. Top Cover ........................................................................ 2-1
1-1-2. Clamper Stay ................................................................... 2-1
1-1-3. Tray Panel ....................................................................... 2-2
1-1-4. Front Panel and Tray ..................................................... 2-3
1-1-5. Rear Panel ....................................................................... 2-3
1-2. PC Board Replacement ...................................................... 2-4
1-2-1. Main PC Board ............................................................... 2-4
1-2-2. Output PC Board ............................................................ 2-4
1-2-3. Power PC board .............................................................. 2-5
1-2-4. Front PC Board ............................................................... 2-5
1-3. Mechanism Parts ................................................................. 2-6
1-3-1. Mechanism Chassis Assembly ....................................... 2-6
1-3-2. Loading Belt .................................................................... 2-6
1-3-3. Loading Motor ................................................................ 2-7
1-3-4. Sub Chassis (with a pickup mechanism) ...................... 2-7
1-3-5. Pickup Mechanism Assembly ........................................ 2-8
1-3-6. Gear A Assembly, Gear B and
Rack Gear Assembly ...................................................... 2-8
1-3-7. Feed Motor ...................................................................... 2-9
3. TROUBLESHOOTING .............................................................. 1-6
3-1. Main Circuit ........................................................................ 1-6
3-1-1. Servo System ................................................................... 1-6
3-1-2. Location Diagram of Servo Test Point ....................... 1-13
SECTION 4
PARTS LIST
SAFETY PRECAUTION ................................................................. 4-1
NOTICE ............................................................................................. 4-1
ABBREVIATIONS ........................................................................... 4-1
1. Integrated Circuit (IC) ............................................................ 4-1
2. Capacitor (Cap) ....................................................................... 4-1
3. Resistor (Res) ........................................................................... 4-1
4. EXPLODED VIEWS ................................................................... 4-2
4-1. Packing Assembly ............................................................... 4-2
4-2. Chassis Assembly ................................................................ 4-3
4-3. Mechanism Assembly ......................................................... 4-4
5. PARTS LIST ................................................................................ 4-5

1-1
SECTION 1
General Descriptions
1. PREPARATION FOR SERVICING
The Pickup Head consists of a laser diode that is very susceptible to external static electricity.
Although it may operate properly after replacement, if subjected to electrostatic discharge during replacement, its
life may be shortened. When replacing the laser diode, LSI's and IC's, use a conductive mat, soldering iron with
ground wire, etc. to protect against damage from static electricity.
1MΩ
Ground conductive
wrist strap for body.
Soldering iron
with ground wire
or ceramic type
Conductive mat
The ground resistance
between the ground line
and the ground is less than 10Ω.
Fig. 1-1-1

1-2
2. LOCATION OF MAIN PARTS AND MECHANISM PARTS
2-1. Location of Main Parts
Fig. 1-2-1
EU05 Output PC board
Feed motor PC board
EU03 Front display PC board
Loading motor PC board
Disc motor PC board
EU04 Power SW PC board
EU01 Main PC board
EU02 Power supply PC board

1-3
2-2. Location of Mechanism Parts
Fig. 1-2-2 Mechanism chassis assembly (Top side)
Fig. 1-2-3 Mechanism chassis assembly (Bottom side)
Tra
y
Clamper sta
y
Loading moto
r
PC boar
d
Mechanism chassi
s

1-4
Fig. 1-2-4 Mechanism chassis assembly (Internal side)
Loading belt
Loading motor
Kick lever
Cam Slide
r
Gea
r
Gea
r
Gea
r
Disc motor

1-5
Fig. 1-2-5 Pickup mechanism chassis assembly (Top side)
Fig. 1-2-6 Pickup mechanism chassis assembly (Bottom side)
Front damper
Rack gear
assembly
Gear A
Gear B assembly
Front dampe
r
Sub chassis
Rear dampe
r
Pickup assembl
y
Rear damper
Feed moto
r
Feed moto
r
PC boar
d

1-6
3. TROUBLESHOOTING
3-1. Main Circuit
3-1-1. Servo System
(1) Initial Operation after Power ON
Power ON
Send each LSI hard RST
command and initial command.
Pickup head is positioned at
transmission initial position.
Is tray closed?
Pin 5 of CN502,
TCLS=L
Disc presence/absence and
disc judgement
Is a disc present?
DVD or CD initial setting.
DVD single
Initial setting.
DVD dual
Initial setting.
CD
Initial setting.
To each disc playback process.
DVD single (single-layer) DVD single
(single-layer)/DVD dual
(dual-layer)/CD?
CD
DVD dual (dual-layer)
1
Tray close operation
Pin 6 of IC601: LDMP = H/L
Pin 7 of IC601: LDMN = L
Is tray closed?
Pin 5 of CN502:
TCLS = L
Y
N
Tray stops.
Pin 6 of IC601: LDMP = H
Pin 7 of IC601: LDMN = L
Laser OFF
Display: INSERT DISC
Monitor screen: NO DISC
Y
Y
NG
N
N
2
Fig. 1-3-1
H

1-7
Pickup (P.U.) transmission initial
operation does not occur.
The pickup transmission initial operation is carried out to
determine the initial position by transmitting the pickup to the
innermost position once (start-limit switch (pin 4 of CN503)
develops "L".) and to the external direction at low speed
(start-limit switch develops "H", turning off the switch.).
1
Does pulse of
1.65V 1.65V develop at
pin 162 of IC502?
Check BUS between IC502
and IC601 and oscillation.
Check feed gear.
N
Y
2-1
"No disc" misjudgement display of
disc presence.
Does lens move with
UP/DOWN full stroke in
focus direction?
Is laser current normal?
Check IC502.
Does search signal
output at both edges of focus coil?
(Pins 10 to 13 of CN501)
Does focus search
voltage of 1.65V 0.4V develop
at pin 1 of IC504 (E597)?
Check pickup head
and wiring.
Does SBAD signal
develop more than 0.3V?
Check IC501.
Lens cleaning.
Replace pickup head.
Check peripheral
circuit of IC601.
Check IC505.
Y
Y
Y
Y
3
N
N
N
Y
N
N
Fig. 1-3-2
Fig. 1-3-3

1-8
Disc kind misjudgement
(Initial setting is NG.)
Replace pickup head.
Lens cleaning.
Check IC501.
Are FE and SBAD
signals for each disc normal?
Check peripheral
circuit of IC601.
2-2
Y
N
Check laser current.
Check laser current.
50 mA lop 90 mA
Check pins 14, 15
and 16 of IC501
serial bus.
Check peripheral
circuits of IC501,
Q501 and Q502.
lop = Voltage between
E522 and E523/3.3Ω
Replace pickup
mechanism.
Check wiring for
pickup head.
Check peripheral circuits
of IC501, Q501 and Q502.
lop 90 mA
lop 50 mA
3
Y
Fig. 1-3-4
Fig. 1-3-5
DVD single (single-layer) disc
detection waveform
FE signal
Pin150 (TP504) of IC502
SBAD signal
Pin152 (TP506) of IC502
1.65V
V : 500 mV/div
H : 2 ms/div
DVD dual (dual-layer) disc
detection waveform
V : 500 mV/div
H : 2 ms/div
CD disc
detection waveform
V : 500 mV/div
H : 2 ms/div
Fig. 1-3-6 Fig. 1-3-7 Fig. 1-3-8

1-9
Disc motor (D.M.) forced
accelleration (500 ms)
Focus search
PLAY
Is forcus servo
ON?
CLV servo ON.
Tracking balance adjustment
Tracking servo ON.
Focus gain adjustment
Tracking gain adjustment
Focus balance adjustment
RF gain adjustment
Repeat three times.
Is address code
possible to read?
Search Picture appears.
Does NG continue
more than 3 s.?
Disc playback NG
4
2-1 5
4
6
Y
N
N
Y
Y
:
Automatic adjustment is carried
out when a disc is replaced after
power ON.
N
N
N
Y
Y
N
N
Y
Y
Fig. 1-3-9
(2) Picture appears (PLAY)

1-10
4
Disc motor (D.M.) does not rotate.
Does pin 117 of IC502
(TP511) PLCK oscillate around
10 MHz ?
Check peripheral
circuit of IC503.
Check peripheral circuits
of IC510 and IC503.
Check disc motor and wiring.
N
Y
Focus servo is NG.
Are FE, SBAD,
FSON signals normal?
Check peripheral circuit of IC601.
Do signals output to
pins 4 to 9 of CN501?
Check IC501.
Check wiring for
pickup head.
Lens cleaning.
Replace pickup
mechanism.
Y
Y
N
N
5
FE signal
Pin 150 (TP504)
of IC502
SBAD signal
Pin 152 (TP506)
of IC502
0.3V
1.65V
0.3V
Focus search Focus servo on
Focus servo ON
signal waveform
Fig. 1-3-10
Fig. 1-3-11
Fig. 1-3-12

1-11
Tracking servo is NG.
Is TE signal normal?
Check peripheral
circuit of IC601.
Check IC501.
6
Y
N
Signal waveform at
tracking servo ON (CD)
TE signal
Pin 151 (TP503) of IC502
1.65V
RFRP signal
Pin 153 (TP501) of IC502
Search ON (SRCH)
Pin 38 (TP508) of IC502
ON search Tracking servo on
Signal waveform at
tracking servo ON (DVD)
Fig. 1-3-13
Fig. 1-3-14
Fig. 1-3-15

1-12
Disc playback is NG (DVD).
Is PLL locked?
(Refer to waveforms.)
Check signal process
system following to IC503.
Check peripheral circuits
of IC502 and IC601.
Does pulse of
L = 1.65V and H = 3.3V
develop at pin 131 and
L = 0V and H = 1.65V
develop at pin 132
of IC502?
Does RF output
higher than 1.5 V(p-p)
develop at pin 45 (TP515)
of IC501 ?
Check IC501.
Lens cleaning.
Pickup mechanism
replacement
Check peripheral circuits of
IC502 and IC601.
Pin 57 of IC501 = 2.4V
Pin 58 of IC501 = 3.0V
Check peripheral circuits
of IC501and IC502.
7
Y
N
N
N
N
Y
Y
Y
DVD RF signal
Pin 45 (TP515) of IC501
V : 500 mV/div
H : 50 ns/div
DVD RF signal
DVD RF signal
Pin 45 (TP515) of IC501
DVD PLCK
Pin 117 (TP511) of IC502
CH1 : TP515 DVDRF 500 mV/div
CH2 : TP511 DVDPLCK 5 V/div
50 ns/div
DVD playback waveform
CD RF signal
Pin 45 (TP515) of IC501
V : 500 mV/div
H : 100 ns/div
CD RF signal
CD RF signal
Pin 45 (TP515) of IC501
CD PLCK
Pin 117 (TP511) of IC502
CH1 : TP515 CDRF 500 mV/div
CH2 : TP511 CDPLCK 5 V/div
100 ns/div
CD playback waveform
Fig. 1-3-16
Fig. 1-3-17
Fig. 1-3-19
Fig. 1-3-18
Fig. 1-3-20
PLL works as a servo loop to generate a clock signal for reading
RF signal binary data. With the PLL locked, the eye pattern is
identified clearly when triggered with the read clock PLCK.

1-13
Fig. 1-3-21
3-1-2. Location Diagram of Servo Test Point
E523
E522
TP515 RF
TP507 FSON
TP508 SRCH
TP501 RFRP
TP506 RFSB
(SBAD)
TP509 VMCK
(23MHz)
TP503 TE TP504 FE
TP505 VREF
TP511 PLCK
IC504 IC501 IC502
IC305
IC601
CN602
CN502
CN503 CN501 CN801
CN901
CN301
IC502
E594 DMDRV
E595 FMDRV
E596 TRDRV
E597 FODRV

1-14
This page is not printed.

2-1
SECTION 2
PART REPLACEMENT AND
ADJUSTMENT PROCEDURES
CAUTIONS BEFORE STARTING SERVICING
Electronic parts are susceptible to static electricity and may easily damaged, so do not forget to take a proper ground-
ing treatment as required.
Many screws are used inside the unit. To prevent missing, dropping, etc. of the screws, always use a magnetized
screwdriver in servicing. Several kinds of screws are used and some of them need special cautions. That is, take care
of the tapping screws securing molded parts and fine pitch screws used to secure metal parts. If they are used improp-
erly, the screw holes will be easily damaged and the parts can not be fixed.
1. REPLACEMENT OF MECHANICAL PARTS
1-1. Cabinet Replacement
1-1-1. Top Cover
1. Remove five screws (1) and remove the top cover (2).
Fig. 2-1-1
1-1-2. Clamper Stay
<Removal>
1. Remove two screws (1).
2. Release two claws and remove the clamper stay (2).
Fig. 2-1-2
Screw (1)
Screw (1)
Top cover (2)
Screws (1)
Clamper stay (2)
Clamper stay (2)
Claw
Claws
Spring
Screws (1)
Clamper
stay (2)
Claw
A

2-2
1-1-3. Tray Panel
<Tray Ejection>
1. Slide the slider (2) of the mechanism chassis assem-
bly (1) with a screwdriver, etc. in the arrow direction,
so that the tray (3) is ejected.
Note:
• Take care not to damage the pickup and other parts.
Fig. 2-1-4
<Tray Panel Removal>
1. Eject the tray (3).
2. Twist the tray panel (4) a little in the arrow A
direction with the tray (3) hold by hand to release
two claws and lift up the tray panel (4) in the arrow B
direction, then the tray panel (4) is removed.
(Refer to Fig. 2-1-5.)
3. When mounting the tray panel (4), insert the tray
panel (4) along the grooves of the both sides of the
tray (3) until clicking.
OK
Tray
NG
Spring
Mechanism
chassis assembly
NG
This part should be touch
to the left side of the tray.
OK NG
Press down by finger
unitil fix the clamper assembly
No floating Floating NG
<Mounting >
1. The spring for tray side pressure is inserted into the
portion “A”. (Refer to Fig. 2-1-2.)
2. By referring to Fig. 2-1-3, insert the spring normally
and mount the clamper stay.
Fig. 2-1-3
Screw
driver
Mechanism
chassis assembly (1) Tray (3)
Front panel
Slider (2)