1. SAF ETY PR EC AUTIONS......................................................2/4
THT-120
2. SP E C IFICA T IONS....................................................................5
3. L OC ATION OF US E R S CONTR OL S....................................6/8
FRONT PANEL
REAR PANEL
DIS P L AY
R E MOTE CONTR OLLE R
4. C O NNE C TING T O E QUIP ME NT............................................9
CONNE CTING TO TV
CONNE CTING TO AUDIO & VIDEO
5. T R OUB LE S HOOTING G UIDE.........................................10/12
6. WA VE FOR MS OF MAJ OR C HE CK P OINT.....................13/14
AUDIO OU T S IG N AL W AV E FOR M
DAC OUT P UT S IGNAL W AV E FO R M
OPTIC AL OUTPUT AUDIO DATA SIGNALFORM
L/R CLOCK DATA WAVEFORMDURING NORMAL PLAY
S E R IAL DATA O UT P U T WAV E FO R M DUR ING NOR MAL P LAY
Pr OUTPUT DATA WAVEFORM IN COMPONE NT OUTPUT
Pb OUTPUT DATA WAVEFOR M IN C OMPONENT OUTPUT
Y OUTP UT DATA WAVE FOR M IN COMPONE NT OUTP UT
7. INTE R NAL B L O C K DIAG R A M OF ICs ................15/20
8. S C H E MA T IC DIA G RAM
CONNECTION DIAGRAM Circuit
MPE G C ircuit
AMP Circuit
ECHO Circuit
Control Circuit
9. E X PlODE D DR AW ING............................................31
10. ELECTRICAL PARTS LIST............................................32/37
.....................................21
............................................22/27
............................................28
............................................29
............................................30
2
Page 2
1. Safety Precautions
WARNING
THIS APPLIANCE TO RAIN OR MOISTURE.
CAUTION :
PLUG TO WIDE SLOT, FULLY INSERT.
ATTENTION :
LA LAME LA PLUS LARGE DE LA FICHE DANS LA BORNE CORRESPONDANTE DE LA PRISE ET POUSSER JUSQU'AU FOND.
: TO PREVENT FIRE OR ELECTRIC SHOCK, DO NOT EXPOSE
CAUTION
RISK OF ELECTRIC SHOCKS
DO NOT OPEN
CAUTION :
TO PREVENT ELECTRIC SHOCK, DO NOT USE THIS POLARIZED AC
PLUG WITH AN EXTENSION CORD, RECEPTACLE OR OTHER OUTLET
UNLESS THE BLADES CAN BE FULLY INSERTED TO PREVENT BLADE
EXPOSURE.
THIS UNIT EMPLOYS A LASER. ONLY QUALIFIED SERVICE PERSONNEL
SHOULD REMOVE THE COVER OR ATTEMPT TO SERVICE THIS DEVICE
DUE TO POSSIBLE EYE INJURY.
CAUTION :
OTHER THAN THOSE SPECIFIED HEREIN MAY RESULT IN HAZARDOUS
RADIATION EXPOSURE.
TO REDUCE THE RISK IF ELECTRIC SHOCK, DO NOT
REMOVE COVER (OR BACK). NO USER SERVICEABLE PARTS
INSIDE.
REFER SERVICING TO QUALIFIED SERVICE PERSONNEL.
THIS SYMBOL IS INTENDED TO ALERT THE USER TO THE
PRESENCE OF UNINSULTED "DANGEROUS VOLTAGE"
WITHIN THE PRODUCT'S ENCLOSURE THAT MAY BE
SUFFICIENT MAGNITUDE TO CONSTITUTE A RISK OF
ELECTRIC SHOCK TO PERSONS.
THIS SYMBOL IS INTENDED TO ALERT THE USER TO THE
PRESENCE OF IMPORTANT OPERATING AND MAINTENANCE
(SERVICING) INSTRUCTIONS IN THE LITERATURE
ACCOMPANYING THE APPLIANCE.
CAUTION
LASER SAFETY
USE OF ANY CONTROLS, ADJUSTMENTS, OR PROCEDURES
TO PREVENT ELECTRIC SHOCK, MATCH WIDE BLADE OF
POUR EVITER LES CHOCS ELECTRIQUES, INTRODUIRE
Important Safety Instructions
- All the safety and operating instructions should be read before
the appliance is operated.
- The safety and operating instructions should be retained for
future reference.
- All warnings on the appliance and in the operating instructions
should be adhered to.
- All operating and use instructions should be followed.
1. Water and Moisture - The appliance should not be used near
water - for example, near a bathtub, washbowl, kitchen sink,
laundry tub, in a wet basement, or near a swimming pool,
and the like.
PORTABLE CART
Figure 2
ceiling only as recommended by the manufacturer.
5. Ventilation - The appliance should be situated so that its
location or position does not interfere with its proper
ventilation. For example, the appliance should not be situated
on a bed, sofa, rug, or similar surface that may block the
ventilation openings; or, placed in a built-in installation, such
as a bookcase or cabinet that may impede the flow of air
through the ventilation openings.
6. Heat - The appliance should be situated away from heat
sources such as radiators, heat registers, stoves, or other
appliances (including amplifiers) that produce heat.
7. Power Sources - The appliance should be connected to a
power supply only of the type described in the operating
instructions or as marked on the appliance.
8. Grounding or Polarization - The precautions that should be
taken so that the grounding or polarization means of an
appliance is not defeated.
9. Power - Cord Protection - Power-supply cords should be
routed so that they are not likely to be walked on or pinched
by items placed upon or against them, paying particular
attention to cords at plugs, convenience receptacles, and the
point where they exit from the appliance.
10.Protective Attachment Plug - If the appliance is equipped with
an attachment plug having overload protection. This is a
safety feature. See Instruction Manual for replacement or
resetting of protective device. If replacement of the plug is
required, be sure the service technician has used a
replacement plug specified by the manufacturer that has the
same overload protection as the original plug.
11.Cleaning - The appliance should be cleaned only as
recommended by the manufacturer.
12.Power Lines - An outdoor antenna should be located away
from power lines.
2. Carts and Stands - The appliance
should be used only with a cart or
stand that is recommended by the
manufacturer.
3. An appliance and cart combination
should be moved with care. Quick
stops, excessive force, and uneven
surfaces may cause the appliance
and cart combination to overturn.
4. Wall or Ceiling Mounting - The appli-
ance should be mounted to a wall or
Page 3
1. Safety Precautions
13.Outdoor Antenna Grounding - If an outside antenna is
connected to the receiver be sure the antenna system is
grounded so as to provide some protection against voltage
surges and built-up static charges. Article 810 of the National
Electrical Code, ANSI/NFPA 70, provides information with
regard to proper grounding of the mast and supporting
structure, grounding of the lead-in wire to an antenna-dis
charge unit, size of grounding conductors,location of antennadischarge unit, connection to grounding electrodes and
requirements for the grounding electrode. See Figure 1.
EXAMPLE OF ANTENNA
GROUNDING
GROUND CLAMP
ELECTRIC
SERVICE
EQUIPMENT
NEC - NATIONAL ELECTRICAL CODE
POWER SERVICE GROUNDING
ELECTRODE SYSTEM
(NEC ART 250 PARTH)
ANTENNA LEAD
IN WIRE
ANTENNA DISCHARGE UNIT
(NEC SECTION 810-20)
GROUNDING CONDUCTORS
(NEC SECTION 810-21)
GROUND CLAMPS
14.Non-use Periods - The power cord of the appliance should be
unplugged from the outlet when left unused for a long period
of time.
15.Object and Liquid Entry - Care should be taken so that objects
do not fall and liquids are not spilled into the enclosure through
openings.
16.Damage Requiring Service - The appliance should be
serviced by qualified service personnel when:
a) The power-supply cord or the plug has been damaged; or
b) Objects have fallen, or liquid has been spilled into the
appliance; or
c) The appliance has been exposed to rain; or
d) The appliance does not appear to operate normally or
exhibits a marked change in performance; or
e) The appliance has been dropped, or the enclosure
damaged.
17.Servicing - The user should not attempt to service the
appliance beyond that described in the operating instructions.
All other servicing should be referred to qualified service
personnel.
Page 4
2. Specifications
P owe r s u pply
Voltage ( Option )AC 230V 50Hz
F ront A mp.S ec tion(tes t with full load)
General s pecifications
P ower c ons umptionS tandby6Watt
Operating150Watt
Dimens ions (W xDx H)/Weight 430 x 306 x 55mm/ 6.0 kg
POWE R OUTPUT at 10% THD
T HD (T OTAL H AR MON IC D IS T OR T IO N )
INPUT S E N. / Impedance @ 1K Hz , 47K ohms
FREQUENCY RESPONSELarge
S /N R ATIO, IHF-A WE IG HTE D
SUBWOOFER TURNOVER FREQUENCY
C HANNE L S E PAR ATION
C enter A mpS ection(tes t with full loa d)
POWE R OUTPUT at 10% THD
T HD (T OTAL H AR MON IC D IS T O R T IO N)
S/N RATIO, IHF-A FILTER
FREQUENCY RESPONSE(Dolby Digital) : Small
R ea r A mpSec tion(tes t with full loa d)
POWE R OUTPUT 10% THD
T HD (T OTAL H AR MON IC D IS T O R T IO N)
S/N RATIO, IHF-A FILTER
FREQUENCY RESPONSE(Dolby Digital) : Small
Small
at 1K Hz, 8 ohms
at 1K Hz, 1W
VIDE O, TV/AUX
at 1K Hz, 1W
at 1K Hz, 1W
VIDE O, TV/AUX
1K Hz
At 1K H z, 8 ohms
At 1K H z, 1W
1W
1W
At 1K H z, 8 ohms
At 1K H z, 1W
1W
1W
15W
0.2%
500mV 30mV /47K
30Hz~30KHz
150Hz~30K Hz
72dB
15~180 H z
55dB
15W
0.14%
72dB
135Hz~18K Hz
15W
0.14%
72dB
150Hz~30K Hz
POWE R OUTPUT at 10% THD
FREQUENCY RESPONSE
S/N RATIO, IHF-A Weight
Input S en. / Impedance
Output Level / Impedance
C olor B a r 100%
Frequency R espons e
Crosstalk
S/N Ratio
S ubwoofe r S ec tion(tes t with full loa d)
At 100Hz, 8 ohms
Video S ection(tes t with full load)
C omposite V ideo(V ide o)
Composite 75 ohm
S -Vide o(Y /C) 75 ohm(DVD only)
C omponent Out(Y / P b / P r):Option
G, R , B(S cart) Out : Option
R ef 500K Hz
@1MHz
DVD
0.7V p-p/0.7Vp-p/0.7Vp-p
1W
1V p-p/75 ohm
1V p-p/75 ohm
1Vp-p/ 0. 286V p-p
1V p-p/0. 7Vp-p/0. 7Vp-p
45dB
60dB
30W
20Hz~150Hz
72dB
0.5 dB
0.5 dB
0.5 dB
0.5 dB
0.5 dB
5Hz~5.7MHz
40dB
Page 5
3. Location of Users Controls
FRONT PANEL喛
8
7
1112
1
POWER
1
Press to switch the power On or Off.
Remote sensor
2
EJECT
3
Press to open/close disc tray.
4
DISPLAY
Gives/Some information on operations, time, etc.
5
VOLUME
Increase/decrease the master volume level.
MICROPHONES (1,2) IN
6
Connect the Karaoke microphone.
MICROPHONES VOLUME
7
Turn to adjust the microphones volumes
REAR PANEL喛
12
13
10
11
910
13
8
PLA Y/PAUSE
62345
Press to start or stop temporarily playback.
9
STOP
Press to stop playback.
PREVIOUS / NEXT
(l/I) (TUNING - /+)
In Disc mode, press to skip to next track or previous
track.
In tuner mode, press to tuning the lower or higher
frequency.
BACK / FORWARD
(/)
In Disc mode, press to skip back or forward in the
track.
ECHO
Increase/decrease the Echo level in Karaoke.
R/L
To select output: Left mono/Right mono/Mix mono/
Stereo.
VIDEO
+
-
SWCSRSLRL
L1 L2
+
-
R1 R2Cr / Pr
2CHAUDIO IN
VIDEO
1
2
3
4
5
SPEAKERS
Connect to the supplied speakers.
AUDIO IN (1, 2)
Connect to audio output of TV or VCR.
AUDIO OUT
Connect to the audio input of an external recording
device or amplifier .
VIDEO OUT
Connect to TV with video input.
S-VIDEO OUT
Connect to TV with S-video input.
COMPONENTVIDEOOUT
L1 L2
2CHAUDIOOUTDIGITALAUDIO
YCb/Pb
6
7
8
9
10
11
VGA
OPTICALCOAXIALS-VIDEOR1 R2
FMAM
AM / FM ANTENNA
Connect to AM loop antenna or FM antenna.
AC LINE CORD
Connect to AC outlet.
OPTICAL (DIGITAL / OUT JACK)
Connect to an optional amplifier.
COAXIAL (DIGITAL / OUT JACK)
Connect to an optional amplifier.
COMPONENT OUT
Video component V/PrU/PbY
Connect to an optional amplifier.
VGA
Connect to the show terminal with VGA port
5
Page 6
3. Location of Users Controls
Stereo Audio
audioUse a pair ofcable (red for right /white
for left) to co nnect t he s tereo audio input of this
unit to the otheraudio output.stereo
Coaxial Dig ital Audio
Other Audio Output
AV Digital Optical/Coaxial Audio Input
L
R
COAXIAL OPTICAL
coaxial o utput of this unit to the coaxial input of
power amplifier.
Optical output
Use thecable to connect the
digitaloutput of this unit to theinput of
power amplifier.
specifiedUse thecoaxial cable to connect the
Specified optical
opticaloptical
Display
MP3 INDICATOR
VCD INDICATOR
DVD INDICATOR
CH/TRK INDICATOR
TITLE INDICATOR
R
Analog Audio Input
L
COAXIAL
OPTICAL
DIGITALAUDIO
Digital Audio Output
HDCD INDICATOR
DTS INDICATOR
DOLBY INDICATOR
TITLE CH/TRK
DVD VCD MP3
ALL
PAUSE INDICATOR
TRACK LOOP INDICATOR
ALL TRACK LOOP INDICATOR
PLAY INDICATOR
6
Page 7
3. Location of Users Controls
Remote controller
1
13
17
4
25
3
21
5
26
29
30
31
28
22
10
1. STANDBY
Press to switch the power On or Off.
2. OPEN/CLOSE
Open or close the disc tray.
3. MENU - MO/ST
Switch the PBC function to On or Off (Video CD 2.0).
In DVD mode, returns to Main Menu page.
In tuner mode, press to select FM Stereo or Mono
4. A-MODE
Press to select Audio mode (stereo out/5.1 ch).
5. ENTER
/
Select and confirm your selection
6. BACKWARD and FORWARD (
In disc mode, press to search fast reverse or fast forward.
In tuner mode, press to search manually radio stations.
7. STOP
Press to stop playback.
8. PLAY/PAUSE(
Press to start or stop temporarily playback.
9. VOLUME
Increase or decrease the master volume level.
/
/
/
/)
/ll)
/
23
18
16
15
20
19
27
12
14
24
11
10. OSD
Display the information about the playing disc.
11. STEP
2
8
7
9
6
In disc mode, press to start frame advance.
12. A-B
Press to repeat a section of a disc
13. PROG
Press to set a program play.
14. REPEAT
Press to repeat one chapter ,title or all
15. ANGLE
Press to change a angle
16. SUBTITLE / AUTO
Press to select a desired subtitle language.
In tuner mode, press to search radio stations.
17. V-MODE
Press to select the Video Mode (YUV/P_YUV/RGB/
P_RGB)
18. GOTO
Press to set quick search function.
19. TONE
Press this button, to select Low, Medium or High Tones.
20. AUDIO / MEMORY
Press to select the audio language and audio channel,
In tuner mode, press to memorize Radio stations.
21. TITLE / AM-FM
Display the title menu,
In tuner mode, to change AM-FM Band Function.
22. KEY (+/-)
Press to change the audio tone
23. NUMBER KEYS (0-9/10+)
Select the items or setting directly.
24. ZOOM
Press to zoom in or out the playing picture.
25. SETUP
Enter or exit the setup menu.
26. SOURCE SELECT
Press to select the source mode.
27. S. EFFECT
Press to select the preset equalizer mode
(Room, Hall, Bathroom, Cave, Arena, Church).
28. L/R/ST
To select output: Left mono/Right mono/Mix mono/Stereo.
29. PREV & NEXT (l
In Disc mode, press to skip to next track or previous track.
In tuner mode, press to tuning the lower or higher preset
radio station..
30. MUTE
Press to mute all of the sound.
31. CH-LEVEL
Press to change the level of each speaker.
/l)
7
Page 8
4. Connecting to Equipment
Connecting to TV
E\
RXWSXWHG WKH79
YCb/Pb
Cr/Pr
+
-
SWCSRSLRL
L1 L2
+
-
R1 R2Cr / Pr
2CHAUDIO IN
VIDEO
VIDEO
COMPONENTVIDEOOUT
L1 L2
2CHAUDIOOUTDIGITALAUDIO
YCb/Pb
VGA
OPTICALCOAXIALS-VIDEOR1 R2
FMAM
Connecting to AUDIO & VIDEO
&RQQHFWWRWKHVSHDNHUVVXSSOLHG
+
-
SWCSRSLRL
L1 L2
+
-
R1 R2Cr / Pr
2CHAUDIO IN
&RQHQHFWWRWKHH[WHUQDXGLRRXWSXW
:FMMPX
7*%&0:&--08
VIDEO
VIDEO
COMPONENTVIDEOOUT
L1 L2
2CHAUDIOOUTDIGITALAUDIO
YCb/Pb
VGA
OPTICALCOAXIALS-VIDEOR1 R2
FMAM
8
Page 9
5. Trouble Shooting Guide
Basic Operating
Insert AC Power Cord.
Turn Power on.
Is Power Supply good?
Yes
Does initial read work?
Yes
Does it pLay?
Yes
Does it output audio?
Yes
No
Check Power supply circuit.
No
Check LASER circuit.
Check focus circuit.
Check disc.
Check protect circuit.
No
Check tracking
SERVO circuit
No
OK
Check AUDIO circuit.
Page 10
5. Trouble Shooting Guide
Karaoke Circuit
Audio output is abnormal when singsing.
Replace JACKS
No
Refer to IC2(pt2399)
in the Echo board
NO
Power Supply is ok?
Yes
Echo is ok?
Yes
Check if waveform about
IC1(4558) pin 2 and pin 7
is ok.
Yes
Check if MIC JACKS are
ok.
Yes
OK
No
Check connection J1
in the ECHO board
No
Check capacitance E10,E11
in the Echo board
Earphone output circuit(Only fit to the mechine with earphone output function )
Check connection J2
in the AMP board
NO
Replace IC1 in the Earphone board
Replace it
H/P out put abnormal
Check if the signal is
carried J12 in the AMP
NO
Supply power is ok?
Check if waveform from IC1 pin 2 and
pin 15 in the Earphone board is ok
Check if the H/P
JACKS is ok.
board
NO
YES
YES
YES
YES
OK
Refer to the audio amplifer and
D/A convert in the MPEG board.
Page 11
5. Trouble Shooting Guide
DVD Block
Remote control abnormal
YES
Is battery good?
YES
Is good the component IR
in the control board?
YES
Check connection CN3 ;
Refer to MPEG schematic
circuit
Open/close abnormal
YES
NO
Replace battery.
NO
Replace it.
VIDEO output abnormal
YES
Check if Pin 168 waveform from
U5 in the MPEG board is ok.
YES
Check if Supply Power is ok.
YES
Check if the VIDEO JACK
is ok.
YES
OK
NO
Refer to MPEG schimati circuit
NO
Refer to Supply Power circuit
NO
Replace it
Check if remote receiver is ok
YES
Check if connections CN5,CN3
and CN4 in the MPEG board
are good
YES
Check if motor-drived IC(5954)
is ok
YES
Check voltage for loading motor
change when press [Eject] button
YES
Check if loading motor or leader
stand is ok
NO
Refer to Remote control circuit
NO
Reconnect them
NO
Refer to motor-drived schematic circuit
NO
NO
Replace it
Audio output abnormal
YES
Check if IC U11 in the MPEG
is good
YES
Check if the components in the
MPEG board (U12,U14 and U15)
are ok
YES
Check if the VIDEO JACKS
are ok
YES
OK
Refer to Supply
Power circuit
NO
NO
Refer to MPEG schimati circuit
NO
NO
Is Power Supply ok?
YES
Check if ouput waveform with
above-mentioned components
are ok.
Replace it
OK
12
12
Replace them(U12,U14 or U15)
Refer to RF amplifier circuit
YES
Page 12
7. W aveforms of Major Check Method
TEST POINT : DVD TEST DISCMDVD-W111 TRACK2 COLOR BAR
Audio Out S ignal
Optic al Output A udio Data S ignal waveform
aveform
w
DAC Output S ignal waveform
L/R Clock Data w
aveform During Normal P lay
S erial Data Output waveform During Normal P lay
16
Page 13
7. W aveforms of Major Check Method
TEST POINT : DVD TEST DISCMDVD-W111 TRACK2 COLOR BAR