LG BH100 Service Manual

MODEL : BH100

SERVICE MANUAL

P/NO : AFN33673316

http://biz.lgservice.com

MARCH, 2007

Super Multi Blue Player

SERVICE MANUAL

MODEL : BH100

CAUTION

BEFORE SERVICING THE UNIT, READ THE “SAFETY PRECAUTIONS”
IN THIS MANUAL.

CONTENTS

SECTION 1.........SUMMARY

SECTION 2.........CABINET & MAIN CHASSIS

SECTION 3.........ELECTRICAL

SECTION 4.........HL-01P LOADER PART

SECTION 5.........REPLACEMENT PARTS LIST

1-2

SECTION 1

SUMMARY

CONTENTS

PRODUCT SAFETY SERVICING GUIDELINES FOR SUPER MULTI BLUE PLAYER
PRODUCTS

....................................................................................................................................................1-3

SERVICING PRECAUTIONS....................................................................................................................1-4

• GENERAL SERVICING PRECAUTIONS

• INSULATION CHECKING PRODEDURE

• ELECTROSTATICALLY SENSITIVE (ES) DEVICES

SERVICE INFORMATION FOR EEPROM IC SETTING..................................................................1-5

DISC UPGRADE ...........................................................................................................................................1-6

SPECIFICATIONS ........................................................................................................................................1-7

1-3

PRODUCT SAFETY SERVICING GUIDELINES FOR

SUPER MULTI BLUE PLAYER 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 LG Corporation. 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 LG Corporation.
Circuit diagrams 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.

CAUTION

: Do not attempt to modify this product in any way. Never perform
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

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.

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

component shorts. This is especially important on items trans-ported to and from
the repair shop.

2. Verify that all protective devices such as insulators, barriers, covers, shields, strain

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.

3. Soldering must be inspected to discover possible cold solder joints, solder

splashes, or sharp solder points. Be certain to remove all loose foreign particles.

4. Check for physical evidence of damage or deterioration to parts and components,

for frayed leads or damaged insulation (including the AC cord), and replace if
necessary.

5. No lead or component should touch a high current device or a resistor rated at 1

watt or more. Lead tension around protruding metal surfaces must be avoided.

6. After reassembly of the set, always perform an AC leakage test on all exposed

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 A LINE 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.

1-4

SERVICING PRECAUTIONS

CAUTION: Before servicing the Super Multi Blue Player
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 publications, always follow the safety
precautions.
Remember Safety First :

General Servicing Precautions

1.Always unplug the Super Multi Blue Player 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 Super Multi Blue
Player 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,
cotton-tipped 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
whitch instruments covered by this service manual might
be equipped.

5.Do not apply AC power to this Super Multi Blue Player and
/ or any of its electrical assemblies unless all solidstate
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.)

1-5

SERVICE INFORMATION FOR EEPROM IC SETTING

Option data read

YES

EEPROM ID check

(Whether a filename of

“eepromif.txt” exists or not)

YES

YES

Check the player set is

“No Disc” or “STOP” state.

Press the “PAUSE” key

and also press orderly
“1472” of number key.

Program start

*** EEPROM initial ***

- Check the player set is “No Disc” or “OPEN” state.
Move hightlight to SETUP --> Display --> TV Aspect --> 16:9 Wide.
And press orderly “1397139” + “ENTER” key of remocon.

Option confirmation mode

MICOM normal

operation start

NO

NO

EEPROM edit table

00 00 00 00 00 00 00 00

UP/DOWN key : Change the

EEPROM data

LEFT/RIGHT key : Move the

Cursor

PAUSE key : Store the

changeddata and
Exit the EEPROM
Edit Table

Detect new EEPROM
(Option edit screen)

1-6

•Burn a DVD recordable disc using UDF format with a file that is named to “LG_BH_LX100000BN.ROM”.

• Insert a upgrading disc that was burned to UDF format only.

• Show help message for disc upgrade as follows.

<in the case of Back End Only or Front End Only burned on DISC>

Firmware Upgrade Mode [Back End]

Current Version : Vxxx.xx
New Version : Vxxx.xx

Press “PLAY” key to upgrade.

• Press play key to upgrade and it will show progress information
(Display percent[%] at VFD panel)

• After completing upgrade then it re-boot by auto.

Firmware Upgrade Mode [Back End]

Current Version : Vxxx.xx
New Version : Vxxx.xx

Upgrading ... Please Wait !!!

DISC UPGRADE

1-7

SPECIFICATIONS

• GENERAL

Power requirements : AC 200-240V, 50/60Hz
Power consumption : 30W
Dimensions (W x H x D) : Approx. 430 x 78 x 250 mm (17 x 3.1 x 9.9 inches) without foot
Weight (Approx.) : 4.1kg (9.1 lbs)
Operating temperature : 5°C to 35°C (41°F to 95°F)
Operating humidity : 5% to 90%

• OUTPUTS

VIDEO OUT : 1.0V (p-p), 75Ω, sync negative, RCA jack x 1/SCART(TO TV)
COMPONENT VIDEO OUT : (Y) 1.0V (p-p), 75Ω,negative sync, RCA jack x 1

(Pb)/(Pr) 0.7V (p-p), 75Ω, RCA jack x 2

HDMI OUT (video/audio) : 19pin (HDMI standard, Type A)
ANALOG AUDIO OUT : 2CH : 2.0Vrms (1kHz, 0dB), 600Ω, RCA jack (L, R) x 1/SCART(TO TV)

6CH : 2.0Vrms (1kHz, 0dB), 600Ω, RCA jack x 6
DIGITAL OUT (COAXIAL) : 0.5V (p-p), 75Ω, RCA jack x 1
DIGITAL OUT (OPTICAL) : 3V (p-p), 75Ω, Optical jack x 1

• SYSTEM

Laser : Semiconductor laser, wavelength : 405nm/650nm/780nm
Signal system : Standard NTSC Color TV system
Frequency response : 8Hz to 44kHz (96 kHz Sampling)

8Hz to 22kHz (48 kHz Sampling)
Signal-to-noise ratio : More than 100dB (ANALOG OUT connectors only)
Harmonic distortion : Less than 0.008%
Dynamic range : More than 95dB
Accessories : Video cable (1), Audio cable (1), Remote control (1), Batteries (2)

Note : Design and specifications are subject to change prior notice.

2-1

SECTION 2

CABINET & MAIN CHASSIS

CONTENTS

EXPLODED VIEWS .....................................................................................................................................2-2

1. CABINET AND MAIN FRAME SECTION ..................................................................................................2-2

2. PACKING ACCESSORY SECTION...........................................................................................................2-3

A

P

C

Q

E

R

P

B

J

D

R

G

K

G

H

J

Q

H

K

F

L

F

E

M

L

D

C

B

A

280

A43

284

286

469

283

253

468

330

260

465

320

265

267

467

465

465

465

466

468

468

468

261

261

261

468

468

285

468

A60

A44

A47

A50

A46

254

252

283

469

263

465

469

469

469

465

469

A43A

CABLE1

CABLE6

CABLE7

CABLE5

CABLE4

CABLE3

CABLE2

469

465

279

262

FRONT

BOARD

SMPS 

BOARD

MAIN 

BOARD

2-2

EXPLODED VIEWS

1. CABINET AND MAIN FRAME SECTION

M

300

2-3

2. PACKING ACCESSORY SECTION

3-1

SECTION 3

ELECTRICAL

CONTENTS

ELECTRICAL TROUBLESHOOTING GUIDE.....................................................................................3-2

1. POWER SUPPLY (SMPS).....................................................................................................................3-2

2. POWER ON ...........................................................................................................................................3-5

3. SYSTEM PART......................................................................................................................................3-6

4. VIDEO PART (COMMON) .....................................................................................................................3-7

5. COMPONENT (YPbPr) VIDEO OUT.....................................................................................................3-8

6. CVBS VIDEO OUT ................................................................................................................................3-9

7. AUDIO (ANALOG) ...............................................................................................................................3-10

8. AUDIO (S/PDIF) ...................................................................................................................................3-11

9. HDMI....................................................................................................................................................3-12

WAVEFORMS ..............................................................................................................................................3-13

1.SYSTEM PART-1..................................................................................................................................3-13

2.SYSTEM PART-2 (SYSTEM MEMORY) ..............................................................................................3-14

3.VIDEO PART-1 (100% FULL COLOR-BAR).........................................................................................3-15

4.VIDEO PART-2 (100% FULL COLOR-BAR).........................................................................................3-16

5.AUDIO PART-1 (ANALOG 5CH : 99Hz, -20dBFS / WOOFER : 30Hz, 0dBFS)...................................3-17

6.AUDIO PART-2 (S/PDIF) ......................................................................................................................3-18

7.HDMI PART...........................................................................................................................................3-19

8.FRONT I/F PART ..................................................................................................................................3-20

9.MPEG-4 DECODER PART-1................................................................................................................3-21

10.MPEG-4 DECODER PART-2................................................................................................................3-22

BLOCK DIAGRAMS ..................................................................................................................................3-23

1.OVERALL BLOCK DIAGRAM ..............................................................................................................3-23

2.SIGNAL PATH BLOCK DIAGRAM........................................................................................................3-24

3.WIRING BLOCK DIAGRAM..................................................................................................................3-25

4.FRONT BLOCK DIAGRAM...................................................................................................................3-26

5.SMPS BLOCK DIAGRAM.....................................................................................................................3-27

CIRCUIT DIAGRAMS................................................................................................................................3-29

1. SMPS (POWER) CIRCUIT DIAGRAM ................................................................................................3-29

2. DECODER-1 CIRCUIT DIAGRAM ......................................................................................................3-31

3. DECODER-2 CIRCUIT DIAGRAM ......................................................................................................3-33

4. MPEG-1 CIRCUIT DIAGRAM..............................................................................................................3-35

5. MPEG-2 CIRCUIT DIAGRAM..............................................................................................................3-37

6. 512MB SDRAM CIRCUIT DIAGRAM ..................................................................................................3-39

7. ROM, IDE, ETHERNET JTAG, UART, FP I/F CIRCUIT DIAGRAM ....................................................3-41

8. AUDIO FPGA CIRCUIT DIAGRAM......................................................................................................3-43

9. AUDIO & VIDEO CIRCUIT DIAGRAM.................................................................................................3-45

10. POWER CIRCUIT DIAGRAM..............................................................................................................3-47

11. FRONT/TIMER CIRCUIT DIAGRAM ...................................................................................................3-49

12. LOGO CIRCUIT DIAGRAM .................................................................................................................3-51

CIRCUIT VOLTAGE CHART...................................................................................................................3-53

PRINTED CIRCUIT DIAGRAMS............................................................................................................3-55

1. MAIN P.C.BOARD..................................................................................................................................3-55

2. FRONT P.C.BOARD ..............................................................................................................................3-57

3. LOGO P.C.BOARD ................................................................................................................................3-58

4. POWER P.C.BOARD.............................................................................................................................3-59

Is the D121 normal?

3-2

ELECTRICAL TROUBLESHOOTING GUIDE

1. POWER SUPPLY (SMPS)

No .5.3VA

YES

Is the F101 normal? Replace the F101 (Use the same fuse)

YES

NO

Is the BD101 normal? Replace the BD101

YES

NO

Is the R101 normal? Replace the R101

YES

NO

Is Vcc (9V - 18V) supplied

to IC101 Pin2?

Is the D102 normal?

YES

NO

NO

Check or replace the D102

IS the D123 normal? Replace the D123

YES

NO

Is there about 2.5V

at the IC103 Pin1?

Replace the IC103

YES

NO

Is the IC102 normal? Replace the IC102

YES

NO

Is the D124 normal? Replace the D124

YES

NO

Is the D127 normal? Replace the D127

YES

NO

Is the D128 normal? Replace the D128

YES

NO

Replace the D121

YES

NO

Is the D122 normal? Replace the D122

YES

NO

Power line of main PCB is short

3-3

ELECTRICAL TROUBLESHOOTING GUIDE

No 5.0 Loader

Is the Vcc

(5.3V) supplied to

IC156 Pin1?

Check or Replace the D128

YES

NO

NO

Is the IC156 pin4 “H”?

Check the PWR CTL

“H” signal from µ-com

YES

Check or replace the IC156

No 3.3V

Is the Vcc

(3.8V) supplied to

IC153 Pin1?

Check or replace the D127

YES

NO

NO

Is the IC153 Pin4 “H”?

Check the PWR CTL

“H” signal from µ-com

YES

Check or replace the IC153

No 12V (Main)

Is the Vcc

(13.5V) supplied to

IC152 Pin1?

Check or replace the D124

YES

NO

NO

Is the IC152 Pin4 ‘H’?

Check the PWR CTL

“H” signal from µ-com

YES

Check or replace the IC152

3-4

No 12 (Fan, Loader)

Is the Vcc

(13.5V) supplied to

IC155 Pin1?

Check or replace the D124

YES

NO

NO

Is the IC155 Pin4 “H”?

Check the PWR CTL
“H” signal from µ-com

YES

Check or replace the IC155

No VF+

Is the ZD121 normal?

Replace the ZD121

YES

NO

Replace the R121

ELECTRICAL TROUBLESHOOTING GUIDE

3-5

POWER on

Normal TV

function OK

Front I/F cable connect

"HELLO PLEASE WAIT"

Display on VFD OK?

Front I/F

cable connection

OK?

NO

NO

YES

VFD power cable connect

VFD power

cable connection

OK?

NO

YES

YES

YES

YES

Touch-Pad I/F
cable connect

"LED ON"

on Touch-Pad OK?

Touch-Pad I/F

cable connection OK?

NO NO

YES

Proper display

cable connect

"LG LOGO"

display on monitor OK?

Display

cable connection

OK?

NO NO

YES

2. POWER ON

ELECTRICAL TROUBLESHOOTING GUIDE

3-6

POWER on

Main Board

Timer Board

Check SMPS

"HELLO PLEASE WAIT"

Display on VFD OK?

P602, 8 pin; +5V,

3 pin; -28V, 4 pin; -32V,

5 pin; -36V ?

NO

NO

YES

YES

YES

X602 change

X602 10MHz OK?

NO

YES

IC600 change

R613 About 625kHz

serial Clock OK?

NO

YES

IC601 change

R611

about 3MHz

OK?

NO

YES

DIS600 change

Check SMPS

“READING”

Display on VFD OK?

P901,

11pin; 12V, 9 pin; 5V,

4 pin; 3.3V?

YES

IC904 Change,

IC901 Change

IC905 or IC903 or

IC908 Change, IC907

Change, IC902

C971; 2.6V,
C972 ; 1.3V C962, C967,
C9F5 ; 1.2V, C9F3 ; 2.5V,

C9E3; 1.8V ?

NO

NO

YES

X402 change

X402

54.000MHz OK?

NO

X401 Change

X401

25.000MHz OK?

NO

YES

IC605 change

IC402

Pin 2, 3, 5, 7 27MHz

OK?

NO

YES

YES

Check IC301System part OK

3. SYSTEM PART

ELECTRICAL TROUBLESHOOTING GUIDE

3-7

No display

Video part OK

C863

(Pin 2) +3.3V

OK?

IC907

(Pin 2) +3.3V

OK?

NO

P901

(Pin 3, 4) +3.3V

OK?

NO NO

YES

YES

YES

Check main
power cable

L803 Re-soldering

YES

L904, L906 Re-soldering

C327

(Pin 2) +2.5V

OK?

C970

(Pin 2) +2.6V

OK?

NO

IC904

(Pin 2) +5.0V

OK?

NO NO

YES

L304 Re-soldering

YES

IC904 Change

C968

(Pin 2) +1.2V

OK?

NO

IC903 Re-soldering

C8F9, C8G0,

C8G1, C8F6 (Pin 2)

signal OK?

L816, L811, L813,

L820 soldering OK?

NO NO

Re-soldering

Re-soldering

L812, L819, L815

soldering OK?

NO

YES

Check IC301

CF804,

CF802, CF806, CF803

(Pin 1) signal OK?

NO

C8F9 ~ C8F6

Re-soldering

YES

YES

YES

YES

JK803

(Pin 1, 3, 5, 7)

signal OK?

NO

CF804 ~ CF803

Re-soldering

YES

YES

VIDEO cable

connection

OK?

NO

Check VIDEO cable

4. VIDEO PART (COMMON)

ELECTRICAL TROUBLESHOOTING GUIDE

3-8

Component video no display

Component video cable connect

YES

NO

5. COMPONENT (YPbPr) VIDEO OUT

Video cable

connection OK?

Video part (Common) check

YES

NO

TP782 ~ TP784 video

signal input OK?

Re-soldering

YES

NO

L812, L819, L815

soldering OK?

Re-soldering

YES

NO

L818, L814, L809

soldering OK?

Re-soldering

YES

NO

L811, L813, L820

soldering OK?

Re-soldering

YES

NO

C8G0, C8G1, C8F6

soldering OK?

Re-soldering

YES

NO

CF802, CF806, CF803

soldering OK?

Re-soldering

YES

NO

JK803 soldering OK?

Component Video OK

ELECTRICAL TROUBLESHOOTING GUIDE

3-9

CVBS video no display

Composite cable connect

YES

NO

6. CVBS VIDEO OUT

Video cable

connection OK?

Video part (Common) check

YES

NO

TP871

Video signal input OK?

Re-soldering

YES

NO

C806 soldering OK?

Re-soldering

YES

NO

L816 soldering OK?

Re-soldering

YES

NO

C8F9 soldering OK?

Re-soldering

YES

NO

CF804 soldering OK?

Re-soldering

YES

NO

JK803 soldering OK?

CVBS video OK

ELECTRICAL TROUBLESHOOTING GUIDE

3-10

No audio

Audio part OK

IC804 ~ IC806

(Pin 8) +11.5V

OK?

C9E7

(Pin 2) +12.0V

OK?

NO

P901

(Pin 11) +12.0V

OK?

NO NO

YES

YES

YES

Check main
power cable

R882 Re-soldering

YES

L905 Re-soldering

IC802

(Pin 28) +5.0V

OK?

C8F5

(Pin 2) +5.0V

OK?

NO

P901

(Pin 9, 8, 7) +5.0V

OK?

NO NO

YES

R855 Re-soldering

YES

L901 ~ 903 Re-soldering

R854, R839, R836

R878~R880 Soldering

OK?

NO

Re-soldering

TP847

LOW = GND

OK?

R884, R814

soldering OK?

NO NO

Re-soldering

Re-soldering

Q806

soldering OK?

NO

YES

Check IC701

C8E1 ~ C8E6

soldering

OK?

NO

Re-soldering

YES

IC802 (Pin 7, 8, 9)

I2S input signal

OK?

NO

Check IC701

YES

YES

YES

TP816 ~ TP821
audio out signal

OK?

NO

Check IC802

YES

YES

YES

JK803 (Pin 11 ~ 21)

audio out signal

OK?

NO

Change IC804 ~ 806

7. AUDIO (ANALOG)

ELECTRICAL TROUBLESHOOTING GUIDE

3-11

No audio

S/PDIF audio OK

IC801

(Pin 5) +3.3V

OK?

P901

(Pin 3,4) +3.3V

OK?

NO NO

YES

YES

YES

YES

Check IC301

main power cable

Check main

power cable

L904, L906 Re-soldering

Change IC801

YES

Change JK802

YES

L901 ~ L903
Re-soldering

IC801 (Pin 4)

Digital Audio Out

OK?

IC801

soldering OK?

NO NO

YES

Re-soldering

JK802

Red Lighting

OK?

JK802

(Pin 2) +5.0V

OK?

NO NO

NO

P901

(Pin 9, 8, 7) +5.0V

OK?

TP8A0

digital audio input

OK?

NO

Check IC301

YES

8. AUDIO (S/PDIF)

ELECTRICAL TROUBLESHOOTING GUIDE

3-12

No A/V

HDMI OK

JK801

Pin 19 (HPD)

OK?

NO

YES

Check IC301

JK801

Pin 15 (SCL), 16 (SDA)

OK?

NO

YES

Check IC301

Check IC301

JK801

Pin 18 +5V

OK?

NO

P901 Pin 7, 8, 9 Check

NO

Re-soldering

YES

JK801

Pin 1, 3, 4, 6, 7, 9, 10,

12 OK?

NO

NO

Re-soldering

YES

Check

CF807~810

OK?

YES

9. HDMI

ELECTRICAL TROUBLESHOOTING GUIDE

3-13

WAVEFORMS

1. SYSTEM PART-1

7438 XTAL (54MHz)

1

1

7438 XTAL for SATA loader (25MHz)

2

2

7438 CLK(27MHz), 7438 PCI CLK(27MHz)

7438 FPGA CLK(27MHz), 7412_0 CLK(27MHz)

7412_1 CLK(27MHz)

3

3

3

3-14

2. SYSTEM PART-2 (SYSTEM MEMORY)

4

4

7438 DDR BA0

5

7

6

5

7438 DDR WE

6

7438 DDR CAS

7

7438 DDR CLK0 (200MHz)

3-15

3. VIDEO PART-1 (100% FULL COLOR-BAR)

8

9

10

11

10

VDAC1_2_Pb

11

VDAC1_0_Pr

8

VDAC0_0_CVBS

9

VDAC1_1_Y

3-16

4. VIDEO PART-2 (100% FULL COLOR-BAR)

12

13

14

15

14

COMP_Pb

15

COMP_Pr

12

CVBS

13

COMP_Y

3-17

5. AUDIO PART-1 (ANALOG 5CH : 99Hz, -20dBFS / WOOFER : 30Hz, 0dBFS)

21

20

19

18

17

16

16

AUDIO_CENTER

17

AUDIO_REARL

18

AUDIO_FRONTL

19

AUDIO_WOOFER

20

AUDIO_REARR

21

AUDIO_FRONTR

3-18

6. AUDIO PART-2 (S/PDIF)

22

23

22

7038_AUDIO_SPDIF

23

AUDIO_DIGITAL_COAXIAL

3-19

7. HDMI PART

25

26

HDMI_CLK

27

HDMI_DATA

24

7038_I2C_SDA

25

7038_I2C_SCL

24

26

27