PRODUCT SAFETY SERVICING GUIDELINES FOR DVD PRODUCTS
IMPORTANT SAFETY NOTICE
This manual was prepared for use only by properly trained audio-video service
technicians.
When servicing this product, under no circumstances should the original design be
modified or altered without permission from NAD. All components should be replaced
only with types identical to those in the original circuit and their physical location, wiring
and lead dress must conform to original layout upon completion of repairs.
Special components are also used to prevent x-radiation, shock and fire hazard.
These components are indicated by the letter “x” included in their component
designators and are required to maintain safe performance. No deviations are allowed
without prior approval by NAD.
Circuit diagrams may occasionally differ from the actual circuit used. This way,
implementation of the latest safety and performance improvement changes into the set
are not delayed until the new service literature is printed.
CAUTION
customized installations without manufacturer’s approval. Unauthorized modifications
will not only void the warranty, but may lead to property damage or user injury.
Service work should be performed only after you are thoroughly familiar with these
safety checks and servicing guidelines.
GRAPHIC SYMBOLS
SERVICE INFORMATION
While servicing, use an isolation transformer for protection from AC line shock. After the
original service problem has been corrected, make a check of the following:
FIRE AND SHOCK HAZARD
1. Be sure that all components are positioned to avoid a possibility of adjacent
2. Verify that all protective devices such as insulators, barriers, covers, shields, strain
3. Soldering must be inspected to discover possible cold solder joints, solder splashes,
4. Check for physical evidence of damage or deterioration to parts and components,
5. No lead or component should touch a high current device or a resistor rated at 1 watt
6. After reassembly of the set, always perform an AC leakage test on all exposed
: Do not attempt to modify this product in any way. Never perform
The exclamation point within an equilateral triangle is intended to alert
the service personnel to important safety information in the service
literature.
The lightning flash with arrowhead symbol within an equilateral triangle
is intended to alert the service personnel to the presence of noninsulated
“dangerous voltage” that may be of sufficient magnitude to constitute a
risk of electric shock.
The pictorial representation of a fuse and its rating within an equilateral
triangle is intended to convey to the service personnel the following fuse
replacement caution notice:
CAUTION: FOR CONTINUED PROTECTION AGAINST RISK OF
FIRE, REPLACE ALL FUSES WITH THE SAME TYPE AND RATING
AS MARKED NEAR EACH FUSE.
component shorts. This is especially important on items trans-ported to and from the
repair shop.
reliefs, power supply cords, and other hardware have been reinstalled per the
original design. Be sure that the safety purpose of the polarized line plug has not
been defeated.
or sharp solder points. Be certain to remove all loose foreign particles.
for frayed leads or damaged insulation (including the AC cord), and replace if
necessary.
or more. Lead tension around protruding metal surfaces must be avoided.
metallic parts of the cabinet (the channel selector knobs, antenna terminals, handle
and screws) to be sure that set is safe to operate without danger of electrical shock.
DO NOT USE ALINE ISOLATION TRANSFORMER DURING THIS TEST. Use an
AC voltmeter having 5000 ohms per volt or more sensitivity in the following manner:
Connect a 1500 ohm, 10 watt resistor, paralleled by a .15 mfd 150V AC type
capacitor between a known good earth ground water pipe, conduit, etc.) and the
exposed metallic parts, one at a time. Measure the AC voltage across the
combination of 1500 ohm resistor and .15 mfd capacitor. Reverse the AC plug by
using a non-polarized adaptor and repeat AC voltage measurements for each
exposed metallic part. Voltage measured must not exceed 0.75 volts RMS. This
corresponds to 0.5 milliamp AC. Any value exceeding this limit constitutes a potential
shock hazard and must be corrected immediately.
TIPS ON PROPER INSTALLATION
1. Never install any receiver in a closed-in recess, cubbyhole, or closely fitting shelf
space over, or close to, a heat duct, or in the path of heated air flow.
2. Avoid conditions of high humidity such as: outdoor patio installations where dew is a
factor, near steam radiators where steam leakage is a factor, etc.
3. Avoid placement where draperies may obstruct venting. The customer should also
avoid the use of decorative scarves or other coverings that might obstruct ventilation.
4. Wall- and shelf-mounted installations using a commercial mounting kit must follow
the factory-approved mounting instructions. A product mounted to a shelf or platform
must retain its original feet (or the equivalent thickness in spacers) to provide
adequate air flow across the bottom. Bolts or screws used for fasteners must not
touch any parts or wiring. Perform leakage tests on customized installations.
5. Caution customers against mounting a product on a sloping shelf or in a tilted
position, unless the receiver is properly secured.
6. A product on a roll-about cart should be stable in its mounting to the cart.
Caution the customer on the hazards of trying to roll a cart with small casters across
thresholds or deep pile carpets.
7. Caution customers against using extension cords. Explain that a forest of
extensions, sprouting from a single outlet, can lead to disastrous consequences to
home and family.
1-3
Page 5
SERVICING PRECAUTIONS
CAUTION: Before servicing the DVD covered by this service
data and its supplements and addends, read and follow the
SAFETY PRECAUTIONS. NOTE: if unforeseen circumstances
create conflict between the following servicing precautions
and any of the safety precautions in this publication, always
follow the safety precautions.
Remember Safety First :
General Servicing Precautions
1. Always unplug the DVD AC power cord from the AC power
source before:
(1) Removing or reinstalling any component, circuit board,
module, or any other assembly.
(2) Disconnecting or reconnecting any internal electrical
plug or other electrical connection.
(3) Connecting a test substitute in parallel with an
electrolytic capacitor.
Caution: A wrong part substitution or incorrect polarity
installation of electrolytic capacitors may result in an
explosion hazard.
2. Do not spray chemicals on or near this DVD or any of its
assemblies.
3. Unless specified otherwise in this service data, clean
electrical contacts by applying an appropriate contact
cleaning solution to the contacts with a pipe cleaner, cottontipped swab, or comparable soft applicator.
Unless specified otherwise in this service data, lubrication of
contacts is not required.
4. Do not defeat any plug/socket B+ voltage interlocks with
which instruments covered by this service manual might be
equipped.
5. Do not apply AC power to this DVD and / or any of its
electrical assemblies unless all solid state device heat sinks
are correctly installed.
6. Always connect the test instrument ground lead to an
appropriate ground before connecting the test instrument
positive lead. Always remove the test instrument ground
lead last.
Insulation Checking Procedure
Disconnect the attachment plug from the AC outlet and turn
the power on. Connect an insulation resistance meter (500V)
to the blades of the attachment plug. The insulation resistance
between each blade of the attachment plug and accessible
conductive parts (Note 1) should be more than 1Mohm.
Note 1: Accessible Conductive Parts include Metal panels,
Input terminals, Earphone jacks,etc.
Electrostatically Sensitive (ES) Devices
Some semiconductor (solid state) devices can be damaged
easily by static electricity. Such components commonly are
called Electrostatically Sensitive (ES) Devices. Examples of
typical ES devices are integrated circuits and some field effect
transistors and semiconductor chip components.
The following techniques should be used to help reduce the
incidence of component damage caused by static electricity.
1. Immediately before handling any semiconductor component
or semiconductor-equipped assembly, drain off any
electrostatic charge on your body by touching a known earth
ground. Alternatively, obtain and wear a commercially
available discharging wrist strap device, which should be
removed for potential shock reasons prior to applying power
to the unit under test.
2. After removing an electrical assembly equipped with ES
devices, place the assembly on a conductive surface such
as aluminum foil, to prevent electrostatic charge buildup or
exposure of the assembly.
3. Use only a grounded-tip soldering iron to solder or unsolder
ES devices.
4. Use only an anti-static solder removal device. Some solder
removal devices not classified as “anti-static” can generate
electrical charges sufficient to damage ES devices.
5. Do not use freon-propelled chemicals. These can generate
an electrical charge sufficient to damage ES devices.
6. Do not remove a replacement ES device from its protective
package until immediately before you are ready to install it.
(Most replacement ES devices are packaged with leads
electrically shorted together by conductive foam, aluminum
foil, or comparable conductive material).
7. Immediately before removing the protective material from
the leads of a replacement ES device, touch the protective
material to the chassis or circuit assembly into which the
device will be installed.
Caution: Be sure no power is applied to the chassis or
circuit, and observe all other safety precautions.
8.Minimize bodily motions when handling unpackaged
replacement ES devices. (Normally harmless motion such
as the brushing together of your clothes fabric or the lifting
of your foot from a carpeted floor can generate static
electricity sufficient to damage an ES device.)
1-4
Page 6
THE PROCESS OF DISC DOWNLOAD
Please follow the below process to download a program with disc
1. Turn on the DVD-player.
(Note. Be sure that there is no disc in DVD-player)
2. Press “SETUP” button on Remote control.
3. Choose a “display” menu by using the cursor button and then choose a “TV Aspect” menu. And choose “16:9”
menu.
4. Press the 1 --> 3 --> 9 --> 7 --> 1 --> 3 --> 9(numerical button) --> Enter key on remote control to confirm the
system information.
5. Remember or write the model name.
6. Change the program file name of new version to the model name
Ex> New ver. program file->LG_DV_LV80F7FC10EMSMIS_V014.ROM
Model name -> LG_DV_LV81F7FC00EMS
Change New ver. program file like this --> LG_DV_LV81F7FC00EMSMIS.ROM
(NOTICE) You must add “MIS” at the end of model name
If you don”t change the file name like that, Disc download isn”t be worked.
1-5
Page 7
7. Copy the changed file to a disc.
8. Insert the copied disc to DVD-player.
9. If the below picture appears on the screen, Press “” key.
10.After the below picture appears on the screen, Disc will emerge from DVD-player automatically.
Take the disc out of the DVD-player.
11.After Disc download is completed, DVD-player turns off and then turns on automatically.
12.Do it again the process 1, 2, 3, 4 to confirm the version.
1-6
Page 8
SPECIFICATIONS
• GENERAL
Power requirements: AC 100 V ~ 240 V, 50 Hz / 60 Hz
Power consumption: 9 W
Dimensions (Approx.): 430 x 39 x 192 mm (17 x 1.5 x 7.6 inches) (W x H x D) without foot
Net weight (Approx.): 1.5 kg (3.3 lbs)
Operating temperature: 5 °C to 35 °C (41 °F to 95 °F)
Operating humidity: 5 % to 90 %
• OUTPUTS
VIDEO OUTPUT: 1.0 V (p-p), 75 , sync negative, RCA jack x 1 / Scart (to TV)
S-VIDEO OUTPUT: (Y) 1.0 V (p-p), 75 , negative sync, Mini DIN 4-pin x 1
(C) 0.3 V (p-p) 75
COMPONENT VIDEO OUTPUT: (Y) 1.0 V (p-p), 75 , negative sync, RCA jack x 1
(Pb)/(Pr) 0.7 V (p-p), 75 , RCA jack x 2
HDMI OUTPUT (Video/Audio): 19 pin (HDMI standard, Type A)
AUDIO OUTPUT: 2.0 Vrms (1 kHz, 0 dB), 600 , RCA jack (L, R) x 1 / Scart (to TV)
DIGITAL AUDIO OUTPUT: COAXIAL: 0.5 V (p-p), 75 , RCA jack x 1
OPTICAL: 3 V (p-p), Optical jack x 1
• SYSTEM
Laser: Semiconductor laser, wavelength 650 nm
Signal system: PAL
Frequency response: DVD (PCM 96 kHz): 8 Hz to 44 kHz
DVD (PCM 48 kHz): 8 Hz to 22 kHz
CD: 8 Hz to 20 kHz
Signal-to-noise ratio: More than 90 dB (ANALOG OUT connectors only)
1. MAIN P.C.BOARD..................................................................................................................................3-53
2. POWER (SMPS) P.C.BOARD ...............................................................................................................3-55
6. USB P.C.BOARD ...................................................................................................................................3-57
3-1
Page 15
ELECTRICAL TROUBLESHOOTING GUIDE
1. SMPS TROUBLESHOOTING FLOW
No 3.3VA
YES
Is the FR101 normal?
YES
Is the D105/D106/D107/
D108 normal?
YES
Is the Vcc (about 17V)
supplied to IC101 Pin2?
YES
Is the D121 normal?
YES
Is there about 2.5V at the
IC103 Pin1?
YES
NO
NO
NO
NO
NO
Replace the FR101
(Use the same ICW)
Replace the
D105/D106/D107/D108
Check or Replace the IC101
Replace the D121
Replace the IC103
Is the D123 normal?
YES
Is the D125 normal?
YES
Power Line of Main
PCB(DVD) is short
NO
NO
Replace the D123
Replace the D125
3-2
Page 16
ELECTRICAL TROUBLESHOOTING GUIDE
No REG 5.0V
YES
Is the Vcc(=5.6V)
•
•
supplied to Q126
Collector?
YES
Is the Vcc(=12V)
•
•
supplied to Q126
Base?
YES
Check or Replace the Q126
No 12V
YES
Is the Vcc(=14V)
•
•
supplied to Q123
Collector?
NO
NO
NO
Check or Replace the D123
Check the ‘PWR CTL “H”’
signal from μ-com
Check or Replace the D125
YES
Is the Vcc(=12V)
•
•
supplied to Q126
Base?
YES
Check or Replace the Q123
NO
Check the ‘PWR CTL “H”’
signal from μ-com
3-3
Page 17
ELECTRICAL TROUBLESHOOTING GUIDE
2. POWER CHECK FLOW
A.B.
No 5VNo 3.3VA.
Is 3.3VA
section working?
YES
Is 5.6V present at
collector of Q126?
YES
Replace Q126.Check FR101Replace Q121.
NO
No 3.3VA
Is there a DC voltage at
cathode of D105 or D107?
NO
NO
NO
Is 3.3VA
section working?
YES
Is 3.3V
present at emitter
of Q121?
YES
YES
Check D105/D106/D107/
D108 and replace.
YES
Replace IC101.
3-4
Page 18
ELECTRICAL TROUBLESHOOTING GUIDE
3. SYSTEM OPERATION FLOW
Power on
1. 8032 initializes SERVO,DSP & RISC registers
2. Write RISC code to SDRAM
3. Reset RISC
Show LOGO
YES
Tray close to closed position
SLED moves to inner position
1. Judge whether have disc and disc type
2. Jump to related disc reading procedure
Recieve OPEN/CLOSE Key?
Tray closed?
NO
SLED at inner side?
NO
YES
YES
NO
1. Execute pressed Key & IR key
2. System operation routine loop
1. Stop playback & open Tray
2. Display tray open message & LOGO
NO
Receive CLOSE Key?
YES
3-5
Page 19
ELECTRICAL TROUBLESHOOTING GUIDE
4. SYSTEM TEST FLOW
TEST
Check the AC
Voltage Power PCBA (110V
or 220V)
YES
Switch on the power PCBA
Is the DC
voltage outputs OK?
(5V, 3.3V, 12V, 5.6V
MOTOR)
YES
Make sure the main PCBA don't
short on VCCs and switch it on.
YES
Is 3.3V
and 1.8V DC outputs normal
on main PCBA?
YES
NO
NO
NO
Replace power PCBA or AC transformer.
Repair or Replace power PCBA
Check the regulators or related diodes.
Connect to PC RS232 cable and
update the FLASH memory code.
Update FLASH
successfully?
YES
A
NO
1. Check 27MHz system clock.
2. Check system reset circuit.
3. Check FLASH R/W enable signal PRD,
RWR.
4. Check RS232 SIGNALS.
5. Check FLASH Memory related circuit.
3-6
Page 20
ELECTRICAL TROUBLESHOOTING GUIDE
A
RESET or power on.
Show LOGO?
YES
Does
tray move inside
when it is not at closed
position?
NONO
Flash
memory operates
properly?
YES
SDRAM
NO
works properly?
YES
MT1389S
VIDEO outputs
NO
properly?
YES
Have TV
NO
signal output?
YES
Check AV cable
connection to TV set.
NO
Normal
TROUT & TRIN
NO
signals?
YES
Check connection lines
between FLASH & MT1389S
and the FLASH access time
whether is suitable or not.
Check connection lines
between SDRAM & MT1389S
and the SDRAM is damaged.
Check the related
circuit of MT1389S.
Check the filtering and amp
circuit of TV signal.
Check the load
OPEN & CLOSE switch
B
YES
TRCLOSE & TROPEN
Normal
signal?
YES
Normal
LOAD+ & LOAD-
signal?
YES
Check the cable connection
between main PCBA and loader.
3-7
NO
NO
Check the tray control I/O
pins on MT1389S & AM5890.
Check the tray control
amplifying circuit on Motor driver.
Page 21
ELECTRICAL TROUBLESHOOTING GUIDE
B
Does
the SLED move
to inner side when it is
at outter position?
YES
Do not put in
disc and tray close.
Motor
driver STBY pin
is high?
YES
Is FMSO
DC level higher
than 1.4V?
YES
SL+
and SL- output
properly?
YES
Check the cable
connection with MECHA.
NONO
NO
NO
Check the connection
line of STBY signal.
Check the related
circuit of FMSO.
Check the amp circuit
on motor driver.
Optical Lens
has movements for
searching
focus?
YES
C
Proper
FOSO outputs to
motor driver?
YES
Proper
F+ & F-
outputs?
YES
Check cable connect on
with pick-up head.
3-8
NONO
NO
Check FOSO connection on
MT1389S and motor dirver.
Check the amp circuit
on motor dirver.
Page 22
ELECTRICAL TROUBLESHOOTING GUIDE
C
Laser turns
on when reading
disc?
YES
Put disc in?
YES
Disc ID is
correct?
NONO
LD01 or LD02
output properly?
YES
Collector
NO
voltage of power transistor
is OK?
YES
Check cable connection
between transistor ouput
and pick-up head.
NO
Laser off
NO
Proper
RFL signal on
NO
MT1389S?
YES
Check the laser power circuit
on MT1389S and connecting
to power transistor.
Check the related circuit on
laser power transistor.
Check the related circuit
on MT1389S RFL signal.
YES
Does
spindle rotate?
YES
D
Check LDO1 & LDO2 signal
NONO
Proper
DMSO signal on
MT1389S.
YES
SP+ & SP-
NO
output properly?
YES
Check the cable
connection between spindle
and main PCBA.
3-9
Check DMSO related
circuit on MT1389S.
Check the spindle control
amp circuit of motor driver.
Page 23
ELECTRICAL TROUBLESHOOTING GUIDE
D
Focus on OK?
YES
Track on OK?
YES
NONO
signals on A, B, C, D of
Proper
MT1389S
YES
Check FEO signal
NO
on MT1389S
YES
Check FOSO
signal on MT1389S
NONO
Normal
TEO Signal on
MT1389S?
YES
Properly
TRSO signal on
NO
MT1389S?
YES
T+ & T- output
NO
properly?
YES
Check connections between
MT1389S and pick-up head.
Check the FOSO connection
on MT1389S and motor driver.
Check the related
circuit on MT1389S
Check the TRSO
connection on MT1389S
and motor dirver.
Check the tracking control
amp circuit on motor driver.
Disc is play?
YES
E
NO
Check cable connection
on pick-up head.
Check RFO & RFLVL
signal waveform.
3-10
Page 24
ELECTRICAL TROUBLESHOOTING GUIDE
E
Normal
Audio output when
disc playback?
YES
Normal
IR.VFD & Front pannel
key functions?
YES
NO
NO
Normal
audio DAC
out?
YES
Check audio filter,
amplify, mute circuit.
Commu-
nications between
IR.VFD Front pannel
key & MT1389S is
normally?
YES
NO
NO
Check the related
circuit of audio DAC.
Check communication
lines on MT1389S.
TEST END
NO
Check the cable
connection on Front pannel.
3-11
Page 25
DETAILS AND WAVEFORMS ON SYSTEM TEST AND DEBUGGIBG
1. SYSTEM 27MHz CLOCK, RESET, FLASH R/W SIGNAL
1) MT1389S main clock is at 27MHz (X601)
1
1
2) MT1389S reset is low active
2
3
4
RESET TIME
FIG 1-1
3.3V
PWR_CTL
2
3
4
IC601
FIG 1-2
3-12
Page 26
3) RS232 waveforn during procedure (Downloading)
5
TXD
6
RXC
FIG 1-3
4) Flash R/W enable signal during download (Downloading)
7
PRD
7
5
6
IC602
8
PWR
8
FIG 1-4
3-13
Page 27
2. SDRAM CLOCK
DCLK = 128MHz, Vp-p=2.2
IC603
9
9
FIG 2-1
3. TRAY OPEN/CLOSE SIGNAL
10
11
12
13
TRIN
TROUT
TRCLOSE
TROPEN
FIG 3-1
IC601
11
10
12
13
3-14
Page 28
4. SLED CONTROL RELATED SIGNAL (NO DISC CONDITION)
15
14
15
16
17
FMSO(1.9V/1.4V/1.1V)
14
STBY(3.3V)
SL+(4.2V/2.8V/1.2V)
SL-(4.2V/2.8V/1.5V)
16
17
FIG 4-1
5. LENS CONTROL RELATED SIGNAL (NO DISC CONDITION)
18
19
20
18
FOSO(1.5V/1.4V/1.3V)
F+(3.2V/2.7V/2.2V)
F-(3.2V/2.7V/2.2V)
20
19
FIG 5-1
3-15
Page 29
6. LASER POWER CONTROL RELATED SIGNAL (NO DISC CONDITION)
IC601
21
22
23
MDI1
(0V/180mV)
LD02
(3.3V/2.3V)
LD01
(3.3V/2.3V)
FIG 6-1
7. DISC TYPE JUDGEMENT WAVEFORM
21
22
23
CN201
24
24
25
26
F+
FE
RFL
FIG 7-1 (DVD)
3-16
IC601
25
26
Page 30
FIG 7-2 (DVD)
F+
FE
RFL
FIG 7-3 (CD)
3-17
F+
FE
RFL
Page 31
8. FOCUS ON WAVEFORM
F+
FE
RFL
FIG 7-4 (CD)
27
28
29
30
IC601
27
FE
28
FOSO
F+
F-
29
30
FIG 8-1 (DVD)
3-18
Page 32
FE
FOSO
F+
F-
FIG 8-2 (CD)
9. SPINDLE CONTROL WAVEFORM (NO DISC CONDITION)
31
32
33
DMSO
(1.4V/1.8V)
SP(3.6V/2.4V)
31
32
SP+
(3.6V/4.8V)
33
FIG 9-1
3-19
Page 33
10. TRACKING CONTROL RELATED SIGNAL (SYSTEM CHECKING)
IC601
34
35
36
37
TE
TRSO
34
T+
T-
FIG 10-1 (DVD)
35
CN201
TE
TRSO
T+
T-
FIG 10-2 (CD)
3-20
36
37
Page 34
11. MT1389S AUDIO OPTICAL AND COAXIAL OUTPUT (SPDIF)
IC601
38
FIG 11-1
38
12. MT1389S VIDEO OUTPUT WAVEFORM
1) Full colorbar signal (CVBS)
FIG 12-1
JK701 2PIN
3-21
Page 35
13. AUDIO OUTPUT FROM MT1389S
FIG 13-1
3-22
Page 36
CONNECTOR PICTURE
1. ALL CONNECTOR PICTURE
3-23
Page 37
2. MAIN BOARD CONNECTOR PICTURE
3-24
Page 38
3. CN201 CONNECTOR PICTURE
CN201 (MD 23PIN)
4. CN202 CONNECTOR PICTURE
CN202 (MD 9PIN)
3-25
Page 39
5. CN601 CONNECTOR PICTURE
CN601 (Front 12PIN)
6. CN602 CONNECTOR PICTURE
3-26
CN602 (POWER 10PIN)
Page 40
7. CN604 CONNECTOR PICTURE
CN604 (USB 4PIN)
8. CN605 CONNECTOR PICTURE
CN605 (KARAOKE 4PIN)
3-27
Page 41
9. CN705 CONNECTOR PICTURE
CN705 (5.1ch 12PIN)
3-28
Page 42
BLOCK DIAGRAMS
JA
CK
1. OVERALL BLOCK DIAGRAM
JACK
3.3V
USB,Karaoke
P
IC604
KA741
OP-AM
A
ADC_DAT
ADC
IC607
CS6340
IC603
64M bit
SDRAM
IC604
3.3VA
FLASH ROM
6M)
(1
ACLK
ABCK
RAMCAS
ROMADD[0:11]
T
ALRCK
ADC_RS
[00:15]
RAMCS1
RAMCS0
RAMRAS
R
RAMBA
IC605
AT24C08A
3.3VA
K
I2CCL
I2CDAT
USBP,USBN
30MHz
ROMDAT
LK
PC
RAMWE
RAMCKE
ROMDATA[0:15]
MEMW
MEMRD
MEMADD[0:19]
3.3VA
1.8VA
EEPROM
L
R
12V
IC702
MC4580
OP-AMP
APWM_R +/=
APWM_L +/=
IC601
MT1389S
RCG_SEL
scart( 16:9)
5V
5V
IC701
S-Video YC
B/
Pb
G/Y
R/Pr
CVBS
SPDIF
27MHz
K
FP CL
FP STB
FP DATA
RF+DSP+5.1ch+karaoke+HDMI Tx + MPEG IC
FFER
VIDEO
BU
RESET
IR RCV
S-VIDEO OPTION
L
COAXIA
OPTICAL
H.H.P.P.D
CK
JA
HDMIHDMI
±
TXC TXC ±
TX[TX[ 0-2-2 ]
Circuit
IRIR
ReceReceiveiver
ToTo F Froront IC IC
DISC
DVD : A,B,C,D,RF
CD : A,B,C,D,E,F,RF
MDI
PICK
MOTOR
SPINDLE
1.8VA
RESET
SO
IC201IC201
A
3.3V
PWR_CTL_H
CDLD,DVDLD,VC20
UP
Pick-up
DP11DP11
M
M
SLED
MOTOR
(FEEDING)
M
MOTOR
LOADING
DECK MECHANISM
TRIN, TROUT
OP(+,-)
FMSO, DMSO,TRSO,FO
STBY, TROPEN, TRCLOSE
TRACK[+,-]
FOCUS[+,-]
SP[+,-]
SLED[+,-]
LOAD[+,-]
e
Voltage
IC201
Motor Driv
AM5890S(5Ch)
5.6VA(M)
5V
ction
dete
BOARD
POWER
50HZ/60Hz
AC 90V~240V
+12V
5.6VA(M)
3.3V
3-29
Page 43
2. POWER (SMPS) BLOCK DIAGRAM
A
12V
OP AMP
LPF
5V
Video Buffer
LPF
Motor Drive IC1.8V
5.6VA(M)
MPEG
RemoconReceiver
Flash Memory
3.3V
LPF
3.3V
SDRAM
LED Clock,Driver
PWR CTL
RECTIFIER(14V)
RECTIFIER(5.6V)
TRANS
SWITCHING IC
3-30
RECTIFIER(3.3V)
FEED B.
AC100~240V
RECTIFIER
Page 44
3. MPEG & MEMORY BLOCK DIAGRAM
O In
terf
ace
5.5.1C1CH
AL_R
AR_R
OptOption
CENTER
WOOFER
Y_G_OUT
CVBS
R_SY_OUT
B_SC_OUT
VIDVIDEO InO Interfterf aceace
AUDAUDIO
InInterfterface
)
ASPDIF(Optica l
ASPDIF(COAXIAL)
IC605
EEPROM
I2Cdata I2CLK
IC603
SDRAM
64M bit
IC604
: EXCEL, SST, MX
(16 M )
RAMADD[0:11]
RAMCAS -
RAMRAS -
RAMCS1 -
RAMCS0 -
RAMBA
RAMWE -
RAMCKE
RAMDAT[00:15]
PCLK
]
DA[0:15
AD[0:19 ]
RESE T,W R-, CS0 -
FLASH MEMORY
CK
USB
JA
ace
D_MUTE
USBP,US BN
MT1389S
terf
AUDIO In
AR
AL
IC601(M(MPEG + DPEG + DSP + RFSP + RF)
X60X601
27MH27MHz
5V
Y_G_OUT
CVBS
R_SY_OU
B_SC_OUT
IC701
VIDEO
BUFFER
H.P.D
T
TX [0-2 ] , TXC
RESET
IR
POWER,
DIN ,DOUT
IC(IC(IC901)C901)
LED D DRIDRIVE
VIDVIDEO InO Interfterf ace
er
HDMI
IC201
AM5890S(5Ch)
Motor Driv
3-31
Page 45
4. SERVO BLOCK DIAGRAM
L
X601
27MHz
X-TA
IC601
ALPC
MTK1389S
ONE CHIP
DVDPLAYER
P-
RESET
ction
Voltage
dete
OP+, OP-
Y
FMSO,DMSO
FOSO, TRSO
TROPEN,
TRCLOSE,
STB
IC201
,
IOA
MDI1
SEL1
CDLD(LD01),DVDLD(LD02),V20
DVD : A,B,C,D,RF
CD : A,B,C,D,E,F,RF
PICK
TRIN,TROUT
Motor Driver
AM5890S(5Ch)
-
PICK
UP
(IM)
3-32
F+, F-,
T+, T-
SL+, SL-
LOAD+,LOAD
M/D
SP+,S
(DP11)
Page 46
5. VIDEO & HDMI BLOCK DIAGRAM
Y
Pb
Y
RGB_H
16_9_H
V.OUT
B
G
R
CVBS
O
S-VIDE
Pb
Pr
HDMI JACK
Pr
SC
SY
±
±
H.P.D
TX[0- 2] , TXC
Y
Y
CVBS
C
Y_C MIX
Y
C
Y_G
Y(G)
Pb_B_SC
Pr_R_S
Pr(R)
Pb(B)
IC601
Mpeg IC
MT1389S
3-33
Page 47
6. AUDIO BLOCK DIAGRAM
A Out "L"
JACK
A out "R"
2
AMP
IC70
MC4580M
MUTE
S/W
AL_R
AR_R
CENTER
WOOFER
5.1ch
Connector
Option
A_L
A_R
IC601
MT1389S
MPEG
MUTEC
Audio
3-34
8DAC
DIF
COAXl _SP
Coaxial
Serial Stereo
Optical
PDIF
Optical _S
tal Out
Digi
Page 48
CIRCUIT DIAGRAMS
ABCDEFGHIJKLMNOPQRST
No Power
D105~D108 is Defective
14VA No Power
D125 is Defective
5.6VA No Power
D123 is Defective
3.3VA No Power
D121 or D122 are Defective
Switching Error
IC101is Defective
Switching Error
IC102,IC103 are Defective
No Power
FR101 is Defective
12V No Power
Q123 is Defective
5.0V No Power
Q126 is Defective
3.3V No Power
Q121 is Defective
1. POWER (SMPS) CIRCUIT DIAGRAM
IMPORTANT SAFETYNOTE :
WHEN SERVICING THIS CHASSIS, UNDER NO CIRCUMSTANCES SHOULD THE ORIGINAL DESIGN BE
MODIFIED OR ALTERED WITHOUT PERMISSION
FROM THE NAD. ALL COMPONENTS SHOULD BE
REPLACED ONLY WITH TYPES IDENTICAL TO
THOSE IN THE ORIGINAL CIRCUIT. SPECIAL COMPONENTS ARE SHADED ON THE SCHEMATIC FOR
EASY IDENTIFICATION. THIS CIRCUIT DIAGRAM MAY
OCCASIONALLY DIFFER FROM THE ACTUAL CIRCUIT USED. THIS WAY, IMPLEMENTATION OF THE
LATEST SAFETY AND PERFORMANCE IMPROVEMENT CHANGES INTO THE SET IS NOT DELAYED
UNTIL THE NEW SERVICE LITERATURE IS PRINTED.
1. Shaded( ) parts are critical for safety. Replace only
with specified part number.
2. Voltages are DC-measured with a digital voltmeter during Play mode.
When reassembling, perform the procedure in
reverse order.
The “Bottom” on Disassembly column of above
Table indicates the part should be disassembled
at the Bottom side.
4-2
Page 62
DECK MECHANISM DISASSEMBLY
MAIN BASE
PLATE CLAMP
MAGNET CLAMP
CLAMP UPPER
HOLDER
BASE MAIN
(Fig. A)
DISC CLAMP ASSEMBLY
TRAY DISC
BASE MAIN
LEVER
FIG. 4-1FIG. 4-2
1. MAIN BASE (FIG. 4-1)
1-1. Clamp Assembly Disc
1) Place the Clamp Assembly Disc as Fig. (A)
2) Lift up the Clamp Assembly Disc in direction of
arrow(A).
3) Separate the Clamp Assembly Disc from the
Holder Clamp.
1-1-1. Plate Clamp
1) Turn the Plate Clamp to counterclockwise
1-1-2. Magnet Clamp
1-1-3. Clamp Upper
direction and then lift up the Plate Clamp.
BASE MAIN
BOTTOM SIDE VIEW
2. TRAY DISC (FIG. 4-2)
1) Insert and push a Driver in the emergency eject
hole(A) at the right side, or put the Driver on the
Lever(B) of the Gear Emergency and pull the
Lever(B) in direction of arrow so that the Tray
Disc is ejected about 15~20mm.
2) Pull the Tray Disc until it is separated from the
Base Main completely.
4-3
Page 63
RUBBER DAMPER
(S2)
RUBBER D
Distinguish upper and
lower sides
(Assemble with care)
AMPER
(S2)
GENERAL PICK UP ASSEMBLY
GEAR RACK
SPINDLE MOTOR ASSEMBLY
(S2)
(S2)
BASE PU
RUBBER DAMPER
Distinguish upper and
lower sides
(Assemble with care)
FIG. 4-3
3. BASE ASSEMBLY SLED (FIG. 4-3)
1) Release 4 Screw (S2).
2) Disconnect the FFC Connector (C1)
3-1. Gear Feed
3-2. Gear Middle
3-3. Gear Rack
1) Release the Scerw (S3)
4. RUBBER REAR (FIG. 4-3)
4-4
Page 64
SCREW INSERTION
TORGUE CONTROL
(800gf DOWN)
GEAR PULLEY
(L4)
BELT LOADING
GEAR LOADING
PWB ASSEMBLY LOADING
BASE MAIN
GUIDE UP/DOWN
BASE MAIN
(H1)
(C2)
(S5)
(A)
(B)
GUIDE UP/DOWN
FIG. 4-4
GUIDE UP/DOWN
(A)
(L5)
FIG. (A)
(B)
(C)
FIG. (C)
5. FRAME ASSEMBLY UP/DOWN (FIG. 4-4)
Note
Put the Base Main face down (Bottom Side)
1) Release the screw (S4)
2) Unlock the Locking Tab (L3) in direction of arrow
and then lift up the Frame Assembly Up/Down to
separate it from the Base Main.
Note
• When reassembling move the Guide Up/Down in
direction of arrow(C) until it is positioned as
Fig.(C).
• When reassembling insert (A) portion of the
Frame Assembly Up/Down in the (B) portion of
the Guide Up/Down as Fig.(B)
6. BELT LOADING(FIG. 4-4)
Note
Put the Base Main on original position(Top Side)
7. GEAR PULLEY (FIG. 4-4)
1) Unlock the Locking Tab(L4) in direction of
arrow(B) and then separate the Gear Pulley from
the Base Main
(A)
(B)
GUIDE UP/DOWN
UP/DOWN FRAME ASSEMBLY
FIG. (B)
8. GEAR LOADING (FIG. 4-4)
9. GUIDE UP/DOWN (FIG. 4-4)
1) Move the Guide Up/Down in direction of
arrow(A) as Fig.(A)
2) Push the Locking Tab(L5) down and then lift up
the Guide Up/Down to separate it from the Base
Main.
Note
When reassembling place the Guide Up/Down as
Fig.(C) and move it in direction arrow(B) until it is
locked by the Locking Tab(L5). And confirm the Guide
Up/Down as Fig.(A)
10. PWB ASSEMBLY LOADING (FIG. 4-4)
Note
Put the Base Main face down(Bottom Side)
1) Release 1 Screws(S5)
2) Unlock the Loading Motor (C2) from the Hook
(H1) on the Base Main.
3) Unlock 2 Locking Tabs(L6) and separate the
PWB Assembly Loading from the Base Main.
11. BASE MAIN (FIG. 4-4)
4-5
Page 65
MEMO
4-6
Page 66
EXPLODED VIEW
1. DECK MECHANISM EXPLODED VIEW
DP-12V
A26
026
A02
017
013
015
435
439
015B
015A
001
A01
002
003
018
014
020
016
010
440
442
A03
012
442
012
442
037
012
019
4-74-8
Page 67
MEMOMEMO
4-94-10
Page 68
NOTES)
)
If you want to purchase
Flash memory, you must order
" IC602A "
NOTES)
Warning
Parts that are shaded are critical with
respect to risk of fire or electrical
shock.
SECTIONREPLACEMENT PARTS LIST
MODEL :5T517C/T517CT(NAD,SWEDEN
RUN DATE : 17-JUNE-08
SALLOCA. NO. PART NO.DESCRIPTIONSPECIFICATIONREMARKS