DAEWOO ELECTRONICS DV 115 User manual

DV-115/125
Digital Home Cinema System

1. SAFETY PRECAUTIONS......................................................3/4
2. SPECIFICATIONS....................................................................5
3. LOCATION OF USERS CONTROLS....................................7/8
-. FRONT PANEL.
1) DV-115 FRONT PANEL.
2) DV-125 FRONT PANEL.
-. REAR PANEL.
-. DISPLAY.
-. REMOTE CONTROLLER.
4. CONNECTING TO EQUIPMENT.........................................9/11
-. CONNECTING TO TV.
-. CONNECTING TO AUDIO & VIDEO.
-. CONNECTING TO SPEAKER.
-. CONNECTING TO RECORDING EQUIPMENT.
5. TROUBLE SHOOTING GUIDE.........................................12/17
6. DVD PROGRAM DOWNLOAD METHOD.............................18
7. WAVEFORMS OF MAJOR CHECK POINT.....................19/20
-. AUDIO OUT SIGNAL WAVEFORM.
-. DAC OUTPUT SIGNAL WAVEFORM.
-. OPTICAL OUTPUT AUDIO DATA SIGNALFORM.
-. L/R CLOCK DATA WAVEFORM DURING NORMAL PLAY.
-. SERIAL DATA OUTPUT WAVEFORM DURING NORMAL PLAY.
-. Cr OUTPUT DATA WAVEFORM IN COMPONENT OUTPUT.
-. Cb OUTPUT DATA WAVEFORM IN COMPONENT OUTPUT.
-. Y OUTPUT DATA WAVEFORM IN COMPONENT OUTPUT.
8. INTERNAL BLOCK DIAGRAM OF ICs............................21/27
9. IC VOLTAGE CHART.......................................................28/29
10. BLOCK DIAGRAM...............................................................30
11. WIRING DIAGRAM.........................................................31/32
1) DV-115 WIRING DIAGRAM.
2) DV-125 WIRING DIAGRAM.
12. LEVEL DIAGRAM...............................................................33
13. SCHEMATIC DIAGRAM.................................................34/43
-. FRONT SCHEMATIC DIAGRAM.
1) DV-115 FRONT SCHEMATIC DIAGRAM.
2) DV-125 FRONT SCHEMATIC DIAGRAM.
-. DSP SCHEMATIC DIAGRAM.
-. MPEG SCHEMATIC DIAGRAM.
-. MAIN SCHEMATIC DIAGRAM.
1) POWER SCHEMATIC DIAGRAM.
2) AMP SCHEMATIC DIAGRAM.
3) INPUT SCHEMATIC DIAGRAM.
4) VIDEO SCHEMATIC DIAGRAM.
14. PRINTED CIRCUIT DIAGRAM.......................................44/49
-. DV-115 FRONT PCB.
1) TOP VIEW.
2) BOTTOM VIEW.
-. DV-125 FRONT PCB.
1) TOP VIEW.
2) BOTTOM VIEW.
-. DSP PCB.
1) TOP VIEW.
2) BOTTOM VIEW.
-. MPEG PCB.
1) TOP VIEW.
2) BOTTOM VIEW.
-. MAIN PCB.
15. MECHANISM........................................................................50
16. EXPLODED VIEW...........................................................51/55
-. MECHANICAL EXPLODED VIEW
1)DV-115
2) DV-125
-. MECHANICAL PARTS LIST
-. DISASSEMBLY VIEW
-. CONNECTOR LIST
17. ELECTRICAL PARTS LIST............................................56/63
Contents

1.SafetyPrecautions
WARNING : TO PREVENT FIRE OR ELECTRIC SHOCK, DO NOT EXPOSE
THIS APPLIANCE TO RAIN OR MOISTURE.
CAUTION : 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
ACCOMPANYINGTHEAPPLIANCE.
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.
LASER SAFETY
THISUNITEMPLOYSA LASER.ONLY QUALIFIEDSERVICE PERSONNEL
SHOULD REMOVE THE COVER OR ATTEMPT TO SERVICE THIS DEVICE
DUE TO POSSIBLE EYE INJURY.
CAUTION: USEOFANYCONTROLS,ADJUSTMENTS, ORPROCEDURES
OTHER THAN THOSE SPECIFIED HEREIN MAY RESULT IN HAZARDOUS
RADIATION EXPOSURE.
CAUTION : TO PREVENT ELECTRIC SHOCK, MATCH WIDE BLADE OF
PLUG TO WIDE SLOT, FULLY INSERT.
ATTENTION : POUR EVITER LES CHOCS ELECTRIQUES, INTRODUIRE
LA LAME LA PLUS LARGE DE LA FICHE DANS LA BORNE CORRESPON-
DANTE DE LA PRISE ET POUSSER JUSQU'AU FOND.
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
futurereference.
- All warnings on the appliance and in the operating instructions
shouldbe 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. 2. Carts and Stands - The appliance
should be used only with a cart or
stand that is recommended by th
manufacturer.
3. An appliance and cart combination
shouldbe moved withcare. Quick
stops, excessive force, and uneven
surfaces may cause the appliance
andcart combination to overturn.
4. Wall or Ceiling Mounting - The appli-
ance should be mounted to a wall or
ceilingonly 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. Forexample, theapplianceshould notbesituated
on a bed, sofa, rug, or similar surface thatmay 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 - Theappliance should besituated away from heat
sources such as radiators, heat registers, stoves, or other
appliances (includingamplifiers) 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 ofthe 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.
CAUTION
RISK OF ELECTRIC SHOCKS
DO NOT OPEN
PORTABLE CART
Figure2
3

1.SafetyPrecautions
13.Outdoor AntennaGrounding - Ifan 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
ElectricalCode, 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 antenna-
discharge unit, connection to grounding electrodes and
requirements for the grounding electrode. See Figure 1.
14.Non-use Periods - The power cord of the appliance should be
unplugged from the outletwhen left unused for a long period
of time.
15.ObjectandLiquid Entry-Careshould betakensothatobjects
donotfallandliquidsarenot spilledintotheenclosurethrough
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.
ANTENNADISCHARGEUNIT
(NECSECTION810-20)
ANTENNALEAD
INWIRE
POWERSERVICEGROUNDING
ELECTRODESYSTEM
(NECART250PARTH)
GROUNDCLAMP
ELECTRIC
SERVICE
EQUIPMENT
GROUNDINGCONDUCTORS
(NECSECTION 810-21)
GROUNDCLAMPS
EXAMPLEOF ANTENNA
GROUNDING
NEC- NATIONAL ELECTRICAL CODE
4

2.Specifications
DV-115/125
Power Supply Power Consumption
Voltage(Option) Operating 160Watt
AC 110V or 120V or 127V or Demensions(W X D X H)/Weight
220V or 230V or 240V(50/60Hz) 430 X 380 X 97mm/9.2kg
Power Output at 0.2% THD At 1KHz 6 ohms 30W X 2
Total Harmonic Distortion At 1KHz 1 W 0.3%
Input Sen./Impedance @ 1KHz, 47K ohms TV , Tape/MD 200mV ±30/47K
Output Level / Impedance @ 1KHz Tape Rec 200mV ±30/2.2K
Frequency Response at 1W : TV, Tape/MD -3dB 20 ~ 50KHz
S/N Ratio IHF-A Weighted TV , Tape/MD 90dB
Subwoofer Turnover Frequency 120Hz
Channel Separation 1KHz 45dB
Crosstalk Tape/MD --> TV 60dB
TV --> Tape/MD 60dB
Power Output at 0.2% THD At 1KHz 6 ohms 30W
Total Harmonic Distortion At 1KHz 1W 0.3%
S/N Ratio IHF-A Weighted Rated Output 55dB
Frequency Response Large 1W 30 ~ 20KHz
Dolby Mode Small 1W 120 ~ 20KHz
Power Output at 0.2% THD At 1KHz 6 ohms 30W X 2
Total Harmonic Distortion At 1KHz 1 W 1.0%
S/N Ratio Dolby Rated Output 55dB
Frequency Response(Only Dolby) ±3dB 1W 120 ~ 6KHz
Input Sen./Impedance Composite Video(Video1, Video2) 1Vp-p/75 ohms ±0.5dB
Output Level / Impedance C-Video(Video1 Rec, Monitor) 1Vp-p/75 ohms ±0.5dB
S-Video(DVD Only) Y:1Vp-p/75 ohms, negative sync. ±0.5dB
C: 0.286Vp-p/75 ohms ±0.5dB
Component Out(DVD Only) Y:1Vp-p/75 ohms, negative sync. ±0.5dB
Cr, Cb: 0.7Vp-p/75 ohms ±0.5dB
Frequency Response 5MHz ~ 6NHz + 0/-3dB + 0/-3dB
Crosstalk @ 1MHz 45dB 40dB
S/N Ratio 45dB 40dB
Tuning Range USA Version 87.5 ~ 108MHz
Multi Europe Version 87.5 ~ 108MHz
Frequency Step USA Version 100KHz
Multi Version 50KHz / 100KHz
Europe Version 50KHz
Usable Sens. 75 ohms S/N 30dB USA Version 2uV(17.2dBf)
S/N 26dB Europe Version 3uV(20.8dBf)
S/N Ratio @ 1mV IHF-A Mono USA Version 70dB
Mono Europe Version 70dB
Stereo USA Version 65dB
Stereo Europe Version 63dB
Tuning Range USA Version 530 ~ 1710kHz
Europe Version 522 ~ 1620kHz
Frequency Step USA Version 10KHz
Multi Version 10 / 9KHz
Europe Version 9KHz
Usable Sensitivity 1000/999KHz S/N 20dB 800uV/m
S/N Ratio 400Hz, 30%Mod, 1000KHz(10mV Input) 40dB
FM Tuner Section FM ANT Impedance : 75 ohms
MW(AM) Tuner Section
Front Amp. Section
Center Amp Section
Rear Amp Section
Video Section
General Specifications
5

3.LocationofUsersControls
-. Front Panel
1) DV-115
1. POWER ON/OFF switch
2. STANDBY indicator
3. STANDBY/ON button
4. SKIP/SEARCH DOWN ( ) button
5. PLAY ( ) button
6. SKIP/SEARCH UP ( ) button
7. PAUSE ( ) button
8. STOP ( ) button
9. DVD/VIDEO CD/MP3 CD/audio CD disc tray
10. OPEN/CLOSE ( ) button
11. Remote control sensor
12. Input selector :
VIDEO 1, VIDEO 2, TAPE/MD, TV buttons
13. Input selector : DVD buttons
14. Display
15. Input selector : TUNER buttons
16. MASTER VOLUME control
17. PHONES jack
18. TUNE/PRESET button
19. FM MODE button
20. TONE button
21. SURROUND MODE button
22. ENTER button
23. MOVE UP( ) button
24. MOVE LEFT( ) button
25. MOVE DOWN( ) button
26. MOVE RIGHT( ) button
27. MENU button
28. MIC jack(Option)
29. ECHO LEVEL control(Option)
30. MIC VOL control(Option)
6
EDR-700S
1. POWER ON/OFF switch
2. STANDBY indicator
3. STANDBY/ON button
4. DVD/VIDEO CD/MP3 CD/audio CD disc tray
5. Remote control sensor
6. OPEN/CLOSE ( ) button
7. Display
8. MIC LEVEL control
9. MENU button
10. TUNING/PRESET button
11. FM MODE button
12. TONE button
13. SURROUND MODE button
14. PHONES jack
15. SKIP/SEARCH DOWN ( ) button
16. PLAY ( ) button
17. PAUSE ( ) button
18. SKIP/SEARCH UP ( ) button
19. STOP ( ) button
20. Input selector :
VIDEO 1, VIDEO 2, TAPE/MD, TV buttons
21. Input selector : DVD buttons
22. Input selector : TUNER buttons
23. MOVE UP( ) button
24. MOVE LEFT( ) button
25. MOVE DOWN( ) button
26. MOVE RIGHT( ) button
27. ENTER button
28. MIC jack(Option)
29. MASTER VOLUME control
2) DV-125

3.LocationofUsersControls
DV-115/125
-. Rear Panel
1. FM ANTENNA connector
2. AM ANTENNA connectors
3. DIGITAL INPUT OPTICAL jack
4. DIGITAL INPUT COAXIAL jack
5. DIGITAL OUTPUT OPTICAL jack
6. PRE OUT SUBWOOFER jack
7. MONITOR OUT jack
8. S VIDEO MONITOR OUT jack
9. COMPONENT VIDEO OUTPUT Y/Cb/Cr jacks
10. Power cord
11. CENTER SPEAKER connectors
12. SURROUND SPEAKERS connectors
13. FRONT SPEAKERS connectors
14. TV IN jacks
15. TAPE/MD IN PLAY(IN)/REC(REC) jacks
16. VIDEO 2 IN jacks
17. VIDEO 1 PLAY(IN)/REC(OUT) jack
18. AC outlet
-. Display
1. SURROUND MODE indicator
2. RDS indicator
3. PROGRAM indicator
4. STEREO indicator
5. DYNAMIC RANGE indicator
6. TUNED indicator
7. PBC(Playback Control) indicator
8. MEMORY indicator
9. MP3 indicator
10. PRESET indicator
11. REPEAT indicator
12. RANDOM indicator
13. SLEEP indicator
14. PLAY indicator
15. DVD/VCD/CD indicator
16. PAUSE indicator
17. MULTI FUNCTION indicator
18. SPEAKER CONFIGURATION indicator
7

8
3.LocationofUsersControls
DV-115/125
-. Remote Controller
1. STANDBY/ON button
2. DVD FUNCTION button
3. TUNER FUNCTION button
4. SPEAKER SETUP button
5. INPUT SELECTOR: TV/TAPE/VIDEO 1
/VIDEO 2 button
6. SET UP button
7. SEARCH button
8. MENU/PBC RETURN button
9. Number buttons
10. CLEAR button
11. PLAY ( ) button
12. PAUSE ( ) button
13. VOLUME buttons
14. FAST REWIND(FR) ( ) button
15. FAST FORWARD(FF) ( ) button
16. SUBTITLE button
17. GAME button
18. ZOOM button
19. DISPLAY button
20. D-RANGE(Dynamic Range) button
21. FM MODE button
22. DIMMER button
23. TEST TONE button
24. REPEAT/PTY button
25. RANDOM/RDS button
26. TUNER PRESET buttons
27. CH LEVEL button
28. MOVE /ENTER buttons
29. DELAY TIME button
30. TONE button
31. MEMORY button
32. TITLE button
33. PLAY MODE button
34. STOP( ) button
35. OPEN/CLOSE button
36. SKIP/SEARCH DOWN ( ) button
37. SKIP/SEARCH UP ( ) button
38. AUDIO button
39. SLOW button
40. ANGLE button
41. A-B REPEAT button
42. CINEMA BASS button
43. SURROUND MODE button
44. SLEEP button
45. MUTING button
46. PBC/RT button
47. MPX button
/ / /
/

4.ConnectingtoEquipment
DV-115/125
-. Connecting to TV
Scart Cable : Optional
9

4.ConnectingtoEquipment
DV-115/125
-. Connecting to AUDIO & VIDEO
10
Remove the
protective caps
before making
connections. When
not in use, be sure
to replace them.

4.ConnectingtoEquipment
DV-115/125
-. Connecting to Speaker
Active subwoofer
[DA-115SW:Optional]
+
Center speaker
[AS-18UD-C:Optional]
++
Front speakers
[AS-18UD-F:Optional]
Right ch. Left ch.
+
+
Surround speakers
[AS-18UD-R:Optional]
Right ch. Left ch.
Press and hold
the lever. Insert the stripped
end of the cord. Release the lever to
replace it.
RED
BLACK BLACK
Audio Input
BLACK
BLACK
BLUE
WHITE WHITE
Model : DV-115
-. Connecting to Recording Equipment
11

5.TroubleShootingGuide
DV-115/125
12
1. Basic Operating
Is STANDBY LED on?
Push power on.
Is POWER on?
Does initial read work
Turn Power on.
Does it play?
Does it output audio?
OK
Yes
Yes
Yes
Yes
Yes
Yes
Check AUDIO circuit.
No
Check tracking SERVO
circuit.
No
Check LASER circuit.
Check focus circuit.
Check disc.
Check protect circuit.
No
Check power supply circuit.
No
Check POWER SUPPLY
circuit.
Check connection CN906.
No
2. Front Micom Circuit
Replace IC904
Yes
Check if IC904 Pin38
is HIGH ?
Check IC904 reset waveform
Check if IC904 Pin44
is High(+5.0V) ?
Check +5.0V line.
Check if IC904 Pin4
is Low(0V) ?
Check Power down line.
Check if IC904 Pin18
is High ?
Yes
Check Protection circuit.
No
No
No
No
No
No
No
1
Does DVD appear
atVFD ?
Push power on.
Does loading appear
atVFD ?
Yes
Does no DISC or
time appear atVFD ?
Yes
Check if DVD an Audio Micom
Interface is OK.
Yes
DoesVideo1/2,
MD/TAPE,TV, FM 87.5kHz
appear atVFD ?
Yes
OK
Check from Micom
to DVD Interface
Check Power
Check Loader.
Check MPEG PCB
Yes
Check Power Supply circuit
No
No
No
Does it not appear
DVD Display atVFD ?
Yes
Does it apear PCM
96kHz Stereo atVFD ?
Yes
Check connector
CN901 if is normally
Yes
Check power supply
circuit of Main PCB
Yes Refer to Power Supply Circuit.
Check Oscillator of X901
Yes Replace X901
Check if IC401 Pin65
is work ?
Yes Check DVD Reset control
Check if Connector
CN901 Pin4 is work ?
Yes
Check Connector
(CP901,CP903) if is
normally.
Yes
Reconnect it.
No
Reconnect it.
No
N
O
No
No
No
No
No
No
No
1
-. Audio Part

13
5.TroubleShootingGuide
DV-115/125
Check if the MIC is OK.
Check if the MIC
VOLUME is OK.
Check if the ECHO
VOLUME is OK.
Front PCB OK. Refer to DSP PCB.
Check if the POWER
PART of the MIC is OK.
Check if the
CN905 is OK.
Check if the 904
PIN(6) is LOW.
Check if the
905(1)(3) waveform.
Refer to POWER SUPPLY circuit.
CN907 PIN1 : +5V , PIN2 : -30V
PIN4 : +5.6V , PIN6 : -
12V
PIN8 : +12V
Re-connect it.
Refer to JA901 MIC JACK.
Refer to
IC901, IC902, IC903.
Yes
Yes
Yes
No
No
No
No
No
Yes
Yes
Yes
Yes
Karaoke option only
2
No
No
Check if theVR901 is
OK.
Check PATTERN.ReplaceVR901.
No
Yes
Refer to IC ES56033.
Check if the
POWER PART of the
FRONT is OK.
Check if the
REMOCON waveform of
the IC904 PIN(8).
Refer to MICOM circuit.
Refer to POWER SUPPLY
circuit.
Check if the IC905
PIN(13) is OK.
Replace IC905. Check RMC circuit.
Yes
Yes
No
No
No
Yes
1
LED ON
Push power on.
Yes
LED OFF
Yes
Yes
Check if ALL
BUTTONS are OK.
Check if the IC904
PIN(44) is OK.
Check if the
FRONT POWER is OK.
Yes
Check if the IC904
OSC PIN(40) waveform is OK.
Yes
Check if the IC904
PIN (44) (45) is OK.
Check if POWER PART
of the FRONT is OK.
Replace X901.
Check if the
VOLUME
is OK.
Check if the
HEADPHONE is OK?
Check if the
REMOCON is OK.
Yes
Yes
Yes
Yes
Yes
Check if the CN906
is OK.
Check if the FL901 PINS
are OK.
Yes
STANDBY ON
No
Yes Re connect it.
Refer to POWER SW PCB
Refer to POWER SUPPLY
circuit.
CN904 PIN4: +5.6V
PIN3: -30V
Refer to POWER
SUPPLY circuit.
IC904 PIN44: +5V
PIN45: -30V
Refer POWER SUPPLY
circuit.
Check IC904
PIN(29) (30) (31) OK.
Refer to MICOM circuit.
Refer to KEY-IN line.
Check PATTERN and
RESOLDING.
No
No
Yes
No
No
No
No
Yes
Yes
No
No
Yes
No
Check if the POWER
is OK.
Check if the CN903
PIN(5) is High.
Check if
HEADPHONE JACK is
OK.
Check MAIN PCB.
Check PH991 circuit.
Replace H/P JACK.
Refer to Power Supply
circuit.
No
No
No
No
Yes
Yes
Yes
Check if POWER PART
of the FRONT is OK.
Check if IC904
PIN(7) (24) waveform OK.
Refer to MICOM circuit.
Refer to Power Supply
circuit.
Check
VR904, R926, R927 OK.
Replace
VR904, R926, R927.
No
No
No
Yes
Yes
No
Refer to MICOM circuit.
Yes
No
No
2
1
Does Initial work? No
-. Front Circuit

14
5.TroubleShootingGuide
-. Audio Part
Check if the IC524
PIN(13) waveform is OK.
Check if the CN503
PIN(1) waveform is OK.
Check if the IC710
PIN(1) waveform is OK.
Check if the
SPKOUT waveform is
OK.
OK
Check if the IC521
PIN(3) waveform is OK.
Check if the IC522 is OK.
Check CN504 MIC OPTION
and R585L/R.
Check if the IC524
PIN(31) waveform is OK.
Refer toVOLUME IC
M62446FP.
Check OP AMP circuit IC525.
Check F_MUTE circuit
same to C-MUTE, S_MUTE.
Refer to Switch circuit IC521.
Refer to OP-AMP circuit.
No
No
Yes
Yes
Yes
Yes
No
Yes
Yes
No
No
Yes
No
Check if the RELAY
CONTROL is OK.
Check if the
IC710 PIN(6).
Check SPEAKER system.
Refer to RELAY circuit.
Refer to MAIN AMP circuit
STK402-050.
No
Yes
Yes
No
No
Check if the CN505
is OK.
Check if the
IC510 PIN(3)(4)
waveform is OK.
Check if the CN502
PIN(7) waveform is OK.
Check if the IC712
PIN(6) waveform is OK.
Check if the IC508
PIN(20) waveform is OK.
Check if the IC518
PIN(3) waveform is OK.
Check if the IC521
PIN(14) waveform is OK.
Reconnect it
Refer to DIR circuit IC504.
Refer to OP AMP circuit
IC511.
Refer to FUNCTION IC IC712
circuit.
Refer to OP AMP circuit
IC711, IC512.
Refer to CODEC circuit IC508
same to FR/C/SL/SR/SW.
Check if the IC518 is OK.
Check if the MUTE/
DSP-MUTE is OK.
Check OP AMP circuit
IC519, 520.
Refer to OP AMP circuit.
Check MUTE/
DSP-MUTE circuit.
Yes
Yes
No
No
No
No
No
Yes
Yes
Yes
Yes
No
No
Yes
Yes
No
No
Yes
1
1
1. DVD Abnormal
AUDIO Abnormal
DV-115/125

15
5.TroubleShootingGuide
DV-115/125
OPTICAL OUT
Abnormal
Check if the IC503
PIN(5) waveform is OK.
Check if the IC502
PIN(3) is OK
Check if the IC502
PIN(2) is OK.
OPTICAL OUT OK.
Refer to DIR circuit IC504
AK4112.
Refer to 74HCU04 circuit
IC503.
Refer to POWER SUPPLY
circuit.
Yes
Yes
Yes
No
No
No
REMOTE CONTROL
Abnormal
Check if the IC904
PIN8 is OK.
Refer to MICOM circuit IC904. Refer to RMC IC IC905.
No
Yes
TrimVOLUME
Abnormal.
Check if the
CS4228 is OK.
Check FRONT PCB. Refer to CODEC IC CS4228.
No
Yes
MAINVOLUME
Abnormal
Check if the
M62446FP is OK.
Refer to FRONT PCB. Refer toVOLUME IC
M62446FP.
No
Yes
Optical in OK Refer to Dir circuit IC504
AK4112.
Optional in Abnormal
Check if the
IC501 PIN(1) is OK.
Check if the IC501
PIN(3) is OK.
Refer to POWER SUPPLY
circuit.
Yes Yes
No
No
Check if the IC504
PIN(11) waveform is OK.
Check if the IC508
PIN(28) waveform is OK.
Replace OPTICAL IC.
Refer to 74HCU04 circuit
IC503.
Yes
Yes
No
No
COAXIAL-IN Abnormal
Check if the JA501
PIN(1) is OK.
Check if the IC504
PIN(13) is OK.
Check if the IC508
PIN(28) waveform is OK.
COAXIAL IN OK
Replace RCA JACK.
Refer to 74HCU04 circuit
IC503.
refer to DIR circuit AK4112.
Yes
Yes
Yes
No
No
No
-. Audio Part

16
5.TroubleShootingGuide
DV-115/125
VIDEO OUT Abnormal
Check if theVIDEO
JACK is OK.
Check if the IC851 is OK.
Check MPEG PCB.
Refer toVIDEO JACK.
Check if the IC781
PIN(7) is OK.
OK
Refer to POWER SUPPLY
circuit.
Yes
Yes
No
No
No
Yes
Check if the IC781
PIN(2)(3) is OK.
Check FRONT PCB.
No
Yes
SOUND Abnormal
Check if the RY702
is OK.
Check if the IC710
PIN(6)(10) waveform is
OK.
OK
Refer to F_RLY_CONTROL.
Check if the IC710
PIN(8)(9) is OK.
Check DSP PCB. Refer to POWER SUPPLY
circuit.
Yes
Yes
No
No
No
Yes
OPEN/CLOSE Abnormal
Check if the FRONT
CONTROL is OK.
Check if the CN706
is OK.
Check if the ATAPI
Cable if is normally.
Check PN303 if
is normally.
Check if the PN303
PIN(3)(5) level is OK.
Check if the
PN101A PIN(3) to
(18) waveform is OK.
Replace MPEG PCB.
Check if the PN402
is OK.
Check PN101E if
is normally.
Check POWER SUPPLY
circuit.
Reconnect it.
Reconnect it.
Refer to FRONT PCB.
Reconnect it.
Check if the
PN303 PINS(1)(2) level is
OK.(0V,5V)
Replace DECK MECHA DVD.
Check if the
IC102 PIN(14)(180) is
OK.(MT1388)
Refer to DRIVER circuit of
TROPEN and PWMOUT1.
No
No
No
No
No
No
No
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
No
Yes
Replace DECK MECHA DVD.
No
-. Audio Part

17
5.TroubleShootingGuide
DV-115/125
PICK-UP unit control
Abnormal
Check if the CN706
is OK.
Check if the ATAPI Cable
is normally.
Check if the
PN302
PINS(1)(2)(5)(6) level is
OK.
Check if the PN302
PIN(3) is OK.
Check if the IC102
PIN165 is OK.
Check PATTERN Open
or Short.
Refer to IC102 (MT1388) or
Replace DECK MECHA DVD.
Check Power Supply Circuit.
Reconnect it.
Check if the IC302
PINS(1)(23) is OK.
Refer to IC302(BA5954FN) or
Replace DECK MECHA DVD.
Check if the IC102
PINS(17)(18) is OK.
Check PATTERN Open
or Short. Replace DECK MECHA DVD.
Refer to IC102 (MT1388) or
replace DECK MECHA DVD.
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
No
No
No
No
No
No
DISC READ Abnormal
Check if the CN706 is
OK.
Check if the ATAPI Cable
is normally.
Refer to PICK-UP Unit or
Replace DECK MECHA DVD.
Check POWER SUPPLY
circuit.
Refer to IC302(BA5954FN) or
Replace DECK MECHA DVD.
Reconnect it.
Yes
Yes
No
No
Check if the IC302
PINS(1)(26) is OK.
Refer to IC102(MT1388).
Replace DECK MECHA DVD.
No
Yes
Check if the PN301
PINS(1)(2)(3)(4) is OK.
Yes
No
VIDEO OUT Abnormal
Check if the PN401
is normally.
Check if the IC410
PINS(39)(40)(43)(44)(47)
(48) is OK.
CheckVIDEO PCB.
Check if the IC410
PIN(1) to (8) is OK.
Check DECK MECHA DVD or
MPEG PCB. Replace DECODER IC CS4955.
Reconnect it.
No
No
No
Yes
Yes
Yes
-. Audio Part

6.DVDProgramDownloadMethod
DV-115/125
INSERT THE UPDATE DISC INTO THE DISC TRAY, THEN THE DVD RECEIVER READS
THE DISC AND UPDATE THE FIRMWAFE ITSELF AS FOLLOWINGS.
@ INSERT THE UPDATE DISC.
NO STATUS VFD MONITOR SET CONDITION
1SET THE KEY LOCK
(TUN.PRESET+OPEN) APPEAR LOCK MARK( ) LOADING DOOR CLOSE
2 DETECT THE UPDATE DISC LOAD LOADING DOOR CLOSE
3 READ THE DISC LOAD DOWNLOAD FROM
CDROM
4 COMPLETED THE READ LOAD or
NO DISPLAY DOWNLOAD FROM CDROM DOOR OPEN : 1)
5 COMPLETED THE UPDATE LOAD LOADING DOOR CLOSE
DOOR CLOSE
6SET THE KEY UNLOCK
(TUN.PRESET+OPEN) DISAPPEAR LOCK MARK LOADING DOOR CLOSE : 2)
NOTE :
2) AFTER COMPLETED, POWER OUT AND IN AGAIN.
1) AFTER DOOR OPEN, EJECT THE UPDATE DISC.
CAUTION :
WHILE DOOR OPEN, IF CD DOOR IS CLOSED BY TOUCH, OR POWER BUTTON
IS PRESSED THEN FLASH MEMORY WILL BE ERASED.
18

7.WaveformsofMajorCheckMethod
DV-115/125
-. Audio Out Signal Waveform -. DAC Output Signal Waveform
-. Optical Output Audio Data Signal waveform -. L/R Clock Data Waveform During Normal Play
-. Serial Data Output Waveform During Normal Play
19
@??@e@?e
3L?@?J5?e
V/X?W.Y?e
?V/T.Yf
@?N@H?@?e
@?J@L?@?e
?W.R/Xf
W.Y?V/X?e
7H?@?N1?e
@??@e@?e
TEST POINT : DVD TEST DISC
?W.?@?e
?7U?@?e
?@1?@?e
?@@?@?e
MDVD-W111 TRACK2 COLOR BAR
@?@@g
@?3@g
@?S5g
@?.Yg

-. Cr Output Data Waveform in Component Output
-. Cb Output Data Waveform in Component Output
-. Y Output Data Waveform in Component Output
7.WaveformsofMajorCheckMethod
DV-115/125
@??@e@?e
3L?@?J5?e
V/X?W.Y?e
?V/T.Yf
@?N@H?@?e
@?J@L?@?e
?W.R/Xf
W.Y?V/X?e
7H?@?N1?e
@??@e@?e
TEST POINT : DVD TEST DISC
?W.?@?e
?7U?@?e
?@1?@?e
?@@?@?e
MDVD-W111 TRACK2 COLOR BAR
@?@@g
@?3@g
@?S5g
@?.Yg
20