DAEWOO DHC-X100N, DHC-X150N Service Manual

1. SAFETY PRECAUTIONS......................................................2/3

2. SPECIFICATIONS....................................................................4

3. LOCATION OF USERS CONTROLS....................................5/7

FRONT PANEL
REAR PANEL
DISPLAY
REMOTE CONTROLLER

4. CONNECTING TO EQUIPMENT...........................................8/9

CONNECTING TO TV
CONNECTING TO AUDIO & VIDEO
CONNECTING TO SPEAKER

5. TROUBLE SHOOTING GUIDE.........................................10/14

6. DVD PROGRAM DOWNLOAD METHOD..............................15

7. WAVEFORMS OF MAJOR CHECK POINT......................16/17

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
Pr OUTPUT DATA WAVEFORM IN COMPONENT OUTPUT
Pb OUTPUT DATA WAVEFORM IN COMPONENT OUTPUT
Y OUTPUT DATA WAVEFORM IN COMPONENT OUTPUT

8. INTERNAL BLOCK DIAGRAM OF ICs............................18/22

9. BLOCK DIAGRAM.................................................................23

10. WIRING DIAGRAM...............................................................24

11. SCHEMATIC DIAGRAM..................................................25/29

FRONT
Mi-COM
INPUT/VIDEO
AMP
POWER

12. PRINTED CIRCUIT DIAGRAM........................................30/33

MAIN
IN/OUT
FRONT [DHC-150 Only]

13. EXPLODED VIEW AND MECHANICAL PARTS LIST...34/37

MECHANICAL EXPLODED VIEW
MECHANICAL PARTS LIST

14. ELECTRICAL PARTS LIST......................................Appendix

Contents

1

DIGITAL HOME CINEMA SYSTEM

[* DVD-DR4033 for Quelle]

DHC-X100N
DHC-X150N

Service Manual

S/N No. :

FEB. 2004

DAEWOO DAT CO., LTD.

Mini Component System

Model:

Digital Home Cinema System

MENU/RETURN

ANGLE

T

I

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E

DHC-X100N/X150N

S

T

A

N

D

B

Y

/

O

N

MENU/RETURN

ANGLE

T

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[DHC-X100N]

[DHC-X150N]

9CD8302200

1. Safety Precautions 1. Safety Precautions

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
ACCOMPANYING THE APPLIANCE.

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

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 :

USE OF ANY CONTROLS, ADJUSTMENTS, OR PROCEDURES

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 CORRESPON­DANTE 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

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.

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
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

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.

CAUTION

RISK OF ELECTRIC SHOCKS

DO NOT OPEN

PORTABLE CART

Figure 2

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.

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.

ANTENNA DISCHARGE UNIT
(NEC SECTION 810-20)

ANTENNA LEAD
IN WIRE

POWER SERVICE GROUNDING
ELECTRODE SYSTEM
(NEC ART 250 PART H)

GROUND CLAMP

ELECTRIC
SERVICE
EQUIPMENT

GROUNDING CONDUCTORS
(NEC SECTION 810-21)

GROUND CLAMPS

EXAMPLE OF ANTENNA
GROUNDING

NEC - NATIONAL ELECTRICAL CODE

2 3

2. Specifications

Power supply AC 110V or 120V or 127V / 60Hz
Voltage ( Option ) 220V or 230V or 240V / 50Hz

Power consumption Standby 2Watt

Operating 90Watt

Dimensions (W x D x H) / Weight 360 x 380 x 70mm/ 6.0 kg

POWER OUTPUT at 10% THD

THD(TOTAL HARMONIC DISTORTION)

INPUT SEN. / Impedance @ 1KHz, 47K ohms

FREQUENCY RESPONSE Large

Small

S/N RATIO, IHF-A WEIGHTED

SUBWOOFER TURNOVER FREQUENCY

CHANNEL SEPARATION

at 1KHz, 6 ohms

at 1KHz, 1W

VIDEO, TV/AUX

at 1KHz, 1W
at 1KHz, 1W

VIDEO, TV/AUX

1KHz

17W

0.2%

500mV±30mV/47K

30Hz~20KHz

100Hz~20KHz

70dB

≤

120Hz

60dB

Front Amp. Section

Center Amp Section

Video Section

Input Sen. / Impedance

Output Level / Impedance

Color Bar 100%

Frequency Response

Crosstalk

S/N Ratio

Composite Video(Video)

Composite 75 ohm

S-Video(Y/C) 75 ohm(DVD only)

Component Out(Y / Pb / Pr):Option

G, R, B(Scart) Out : Option

Ref 500KHz

@1MHz

DVD

1Vp-p/75 ohm
1Vp-p/75 ohm

1Vp-p/ 0.286Vp-p

1Vp-p/0.7Vp-p/0.7Vp-p

0.7Vp-p/0.7Vp-p/0.7Vp-p
45dB

60dB

±

50 mV

±

50 mV

±

50 mV

±

50 mV

±

50 mV

5Hz~5.7MHz

40dB

POWER OUTPUT at 10% THD

THD(TOTAL HARMONIC DISTORTION)

S/N RATIO, IHF-A FILTER

FREQUENCY RESPONSE(Dolby Digital) : Small

At 1KHz, 6 ohms

At 1KHz, 1W

1W
1W

17W

0.2%

70dB

100Hz~20KHz

General specifications

FM Tuner Section

(FM ANT Impedance : 75 ohms)

Tuning Range

Scanning

Frequency Interval
Usable Sensitivity,

75 ohms

S/N Ratio @1mV

IHF-A FILTER

USA Version

Europe Version

USA Version

Europe Version

S/N=30dB,USA Version

S/N=26dB,Europe Version

Mono USA Version

Mono Europe Version

Stereo USA Version

Stereo Europe Version

87.5~108.0MHz

87.5~108.0MHz
100KHz

50KHz
2uV(17.2dBf)
3uV(20.8dBf)

70dB
70dB
65dB
65dB

POWER OUTPUT 10% THD

THD(TOTAL HARMONIC DISTORTION)

S/N RATIO, IHF-A FILTER

FREQUENCY RESPONSE(Dolby Digital) : Small

Rear Amp Section

At 1KHz, 6 ohms

At 1KHz, 1W

1W
1W

17W

0.2%

70dB

100Hz~20KHz

Subwoofer Section

POWER OUTPUT at 10% THD

FREQUENCY RESPONSE

S/N RATIO, IHF-A Weight

At 100Hz, 8 ohms

1W

30W

20Hz~150Hz

70dB

AM Tuner Section

(AM Loop antenna)

Tuning Range

Scanning

Frequency Interval

Usable Sensitivity,

75 ohms

S/N Ratio @1mV

IHF-A FILTER

USA Version

Europe Version

USA Version

Europe Version

S/N=20dB,USA Version

S/N=20dB,Europe Version

USA Version

Europe Version

530~1710KHz
522~1620KHz

10KHz

9KHz
54 dBu
54 dBu

40 dB

40 dB

4

3. Location of Users Controls

Front P anel

5

1. STANDBY indicator

2. STANDBY / ON button

3. DVD/VIDEO CD/MP3 CD/audio CD disc tray

4. OPEN/CLOSE ( ) button

5. PLAY ( ) button

6. STOP ( ) button

7. PREV ( ) button

8. NEXT ( ) button

9. FUNCTION button

10. Remote Control Sensor

11. Display

12. MASTER VOLUME control

13. PHONES jack

[DHC-X100N]

S

T

A

N

D

B

Y

/

O

N

1. STANDBY indicator

2. STANDBY / ON button

3. DVD/VIDEO CD/MP3 CD/audio CD disc tray

4. Remote Control Sensor

5. Display

6. MASTER VOLUME control

7. OPEN/CLOSE ( ) button

8. PLAY ( ) button

9. STOP ( ) button

10. PREV ( ) button

11. NEXT ( ) button

12. FUNCTION button

13. PHONES jack

[DHC-X150N]

7

3. Location of Users Controls

Remote Controller

3. Location of Users Controls

6

1. Pro Logic indicator

2. DOLBY DIGITAL indicator

3. DTS indicator

4. DVD indicator

5. VCD indicator

6. MP3 indicator

7. SLEEP indicator

8. REPEAT indicator

9. ALL indicator

10. TOTAL indicator

11. REMAIN indicator

12. RDS indicator

13. PLAY indicator

14. PAUSE indicator

15. TITLE indicator

16. CHAPTER indicator

17. TRACK indicator

18. DSP indicator

19. STEREO indicator

20. RANDOM indicator

21. MUTE indicator

22. PBC(Playback Control) indicator

23. PLAYING INFORMATION display

1. STANDBY/ON button

2. OPEN/CLOSE button

3. MUTE button

4. INPUT SELECTOR: DVD button
/ TV SYSTEM button

5. INPUT SELECTOR: TUNER(FM/AM) button

6. INPUT SELECTOR: VIDEO, TV/AUX button

7. FAST REVERSE(FR) ( ) button

8. SKIP PREV ( ) button

9. SPEAKER SETUP button

10. CH LEVEL button

11. PLAY ( ) button

12. STOP( ) button

13. MENU/RETURN button

14. PAUSE/STEP button

15. Number buttons

16. DISPLAY/FM MODE button

17. TEST TONE button

18. SUBTITLE button

19. SLOW button

20. A-B REPEAT button

21. ANGLE button

22. RANDOM button

23. DIGEST/RDS MODE button

24. MPX/PTY SEARCH button

25. SLEEP button

26. FAST FORWARD(FF) ( ) button

27. SKIP NEXT ( ) button

28. MOVE /ENTER buttons

29. SURROUND MODE button

30. TITLE button

31. VOLUME buttons

32. SET-UP button

33. GO TO/AUTO MEMORY button

34. DELAY TIME button

35. AUDIO button

36. ZOOM button

37. REPEAT button

38. PBC button

/  /  / 

/

Display

1. AUDIO IN jacks

2. VIDEO IN jack

3. MONITOR OUT jack

4. DIGITAL OUTPUT jack

5. S VIDEO OUT jack

6. SCART jack or COMPONENT VIDEO OUTPUT
Y/Pb/Pr jacks(Optional)

7. Power cord

8. AM ANTENNA connector

9. FM ANTENNA connector

10. FRONT SPEAKER connectors

11. CENTER SPEAKER connectors

12. WOOFER SPEAKER connector

13. REAR SPEAKER connectors

14. SUBWOOFER output jack

S-VIDEO OUT
(DVD ONLY)

Rear P anel

4. Connecting to Equipment

Connecting to Speaker

9

Connecting to AUDIO & VIDEO

4. Connecting to Equipment

Connecting to TV

8

S-VIDEO OUT
(DVD ONLY)

S-VIDEO OUT
(DVD ONLY)

MUSIC, MOVIE, STADIUM)

S-VIDEO OUT
(DVD ONLY)

To prevent damage to circuits, never short-circuit the positive (+) and negative (-) speaker wires.
Do not connect the speaker cable to the L and R connectors at the same time and do not connect more

than one speaker to the same speaker connectors.

5. Trouble Shooting Guide

11

Push power on.

Check Power down line.

Check if IC750
Pin24 is High ?

Replace IC750

No

Yes

Check if IC750

Pin25 is High ?

Yes

Check Protection Circuit.

No

Replace XC750.

Check Oscillator

of XC750.

Check DVD Reset control.

Check if IC400

Pin3 is work?

Yes

No

No

Yes

Check if Connector

CN703 are work?

Check from Micom

to DVD interface.

No

Refer to Power

Supply Circuit.

Check power

supply circuit of

regulator PCB.

Check loader.

Check Loader PCB.

No

Yes

Check Power.

Yes

Check Power Supply Circuit.

No

Yes

Does DVD appear

at VFD ?

Does loading appear

at VFD ?

Check if DVD an Audio
Micom interface is OK.

Yes

No

Yes

Does no DISC or

time appear at VFD ?

Yes

No

Check Loader PCB.

Check connector

CW620, CN907

if it normaly?

Yes

No

No

Recheck It.

Basic Operating Mi-Com Circuit

5. Trouble Shooting Guide

Check Loader Power

Supply circuit.

Check Connection CN620,

CW713, CW610, CN907.

Does initial read work

Check Loader circuit.
Check Loader Pickup.

Does it paly?

OK

Yes

No

No

Yes

Does it output audio?

Yes

Check AUDIO circuit.

No

Check POWER

SUPPLY circuit(PT900,IC901)

Check connection

CN700, CW712, CW902

Is STANDBY LED on?

No

Yes

Is POWER on?

Check power supply circuit.

Check Mi-Com IC(IC750)

No

Yes

Turn Power on.

Insert AC Power Cord.

10

12 13

5. Trouble Shooting Guide

Subwoofer output

Abnormal

Replace SW Jack

Refer to VOL IC400

Checkif the

IC400 PIN 36

waveform is OK.

Checkif the
IC803 PIN 4

waveform is OK.

Check if the SW

Jack is OK

OK

No

No

Yes

No

Refer to SW AMP IC803

Yes

Yes

REMOTE CONTROL

Abnormal

Refer to RMC

Check if the IC750

PIN2 is OK.

Refer to MICOM

Yes

No

MAIN VOLUME &
CHANNEL Level

Abnormal

Refer to Loader PCB

Check if the

IC300, IC400 is

OK.

Refer to FRONT PCB

Yes

No

H/P outout Abnormal

Refer to H/P AMP IC404

Checkif the

IC404 PIN 1, 7

waveform is OK.

Refer to H/P

Control circuit

No

Yes

Check if the

H/P Jacknis OK.

Yes

Replace H/P Jack

No

Audio Block

5. Trouble Shooting Guide

Insert AC Power Cord.

Check PATTERN and

RESOLDERING.

Check if the FL700

PINS are OK

Yes

No

Check if the

FRONT POWER

is OK.

Replace XC750

Check if the

IC750 OSC PIN wave-

form is OK.

Yes

No

No

Yes

Check if the IC750

PIN(72) is OK.

Refer to POWER
SUPPLY circuit.

No

Re connect it.

Check if the

CW700 is OK ?

No

Yes

Yes

LED ON

LED OFF

STANDBY ON

Yes

Yes

Does initial work ?

Yes

No

Refer to

MICOM circuit.

Check if the

REMOCON is OK.

Yes

Check if ALL

BUTTONS are OK.

Check if the

VOLUME is OK.

Yes

Yes

Check if the

HEADPHONE is OK.

Yes

Front PCB OK

Check if the

HEADPHONE Jack

is OK.

Yes

Check if the

POWER is OK.

Yes

Check if the

J700 PIN(4)

is High.

Yes

Check MAIN PCB

Refer to Power
Supply circuit.

Check J700 circuit.

Replace H/P JACK

Check if the

IC750 PIN(14) (15)

is OK.

Yes

Check if the

VR700,HR714,HR715

is OK.

Yes

Check if the

POWER PART of the

FRONT is OK.

Yes

Refer to

MICOM circuit.

Refer to Power

Supplycircuit.

Replace VR700,

HR714, HR715

Check if the

IC750 PIN(22),(23)

is OK.

Yes

Check if the

POWER PART of the

FRONT is OK.

Yes

Refer to

MICOM circuit.

Refer to POWER

SUPPLY circuit.

Refer to KEY-IN line

No

No

No

No

No

No

No

No

Check if the

IC700 PIN(1) is OK.

Yes

Check if the

POWER PART of the

FRONT is OK.

Yes

Check if the

REMOCON waveform of

the IC750 PIN(2)

Yes

Refer to

MICOM circuit.

Refer to Power

Supply circuit.

Replace IC700

Check RMC circuit.

No

No

No

No

No

No

No

1

2

1

2

No

No

Refer to POWER
SUPPLY circuit.

CW712 Pin(1) : 5V

Front Circuit

6. DVD Progr am Download Method

MPEG PROGRAM DOWNLOAD METHOD

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

1 STARTING UPDATE DISC LOADING LOADING DOOR CLOSE

2 DETECT THE UPDATE DISC

TRK

▶000 0:00:00

FLASH

ES6629.ROM

READING

DOOR CLOSE

3 READ WRITING/ERASE

4 COMPLETED THE READ DONE DOOR OPEN

5 END DOOR OPEN

DOOR OPEN

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.

TRK

▶000 0:00:00

TRK

▶000 0:00:00

1514

5. Trouble Shooting Guide

Refer to Loader circuit.

Check if the

SPK OUT is OK.

Check if CW712

is OK.

SOUND Abnormal

VIDEO OUT Abnormal

Refer to VIDEO JACK

Check if the VIDEO

JACK is OK

OK

OPEN/CLOSE Abnormal

Replace DECK

MECHA DVD

Check Power Supply circuit.

OK

Replace to POWER

Supply circuit.

Check if the CW600

is OK

Check if the IC600

PIN(8) is OK

Reconnect it

Check if the IC600

PIN(1) is OK

Replace it.

Check if the FRONT

CONTROL is OK.

Check if the CN703

cable is nomally.

Refer to MICOM circuit.

Check if the IC750

is OK.

Check Connection

CW610 is OK.

Refer to AMP circuit.

Check if the

IC301, IC302, IC303

is OK.

Yes

Yes

No

No

No

Yes

Yes

No

Refer to MICOM circuit.

Yes

No

No

Yes

Refer to MICOM circuit.

No

No

Yes

Yes

No

Yes

No

No

Yes

DVD Block

Pr Output Data Waveform in Component Output

Pb Output Data Waveform in Component Output

Y Output Data Waveform in Component Output

7. W aveforms of Major Check Method

TEST POINT : DVD TEST DISC MDVD-W111 TRACK2 COLOR BAR

17

7. W aveforms of Major Check Method

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

16

TEST POINT : DVD TEST DISC MDVD-W111 TRACK2 COLOR BAR

8. Internal Block Diagram of ICs

19

8. Internal Block Diagram of ICs

BA4560F

18

CS4360

LA7952

1.Vin 2. Vo 3. GND 4. Vdis

1

+5V

18K15K

IN (L)

1µF

15K 1µF

MUTE/

ST-BY

GND

IN (R)

1µF

4.7Ω

4.7Ω

100nF

100nF

OUT (L)

OUT (R)

1000µF

1000µF

+V

S

3

5
7

9

6

11

2

4+

+

-

-

D94AU085

RL (L)

RL (R)

-V

S

µP

560Ω

18K

IN- (L)8

10 IN- (R)

1

560Ω

18K

KA278R05/278R33

TDA7265/7269A

THERMAL SHUTDOWN

BANDGAP REFERENCE

OVERVOLTAGE
PROTECTION

SOA PROTECTION

SHORTCIRCUIT
PROTECTION

1

4

3

2Vin

Vdis

Vo

GND

HIGH / LOW OUTPUT

ON / OFF

Q1

R1

R2

­+

­+

1.4V

SHORT-CIRCUIT

NJU7313A

8. Internal Block Diagram of ICs

M62446AFP

21

8. Internal Block Diagram of ICs

20

ES6638

NJM4558

8. Internal Block Diagram of ICs

22

AK5381

9. Block Diagram

23