42px4r Za Ch.mf-056a - [PDF Document] (2024)

PLASMA TVSERVICE MANUAL

CAUTIONBEFORE SERVICING THE CHASSIS,READ THE SAFETY PRECAUTIONS IN THIS MANUAL.

CHASSIS : MF-056A

MODEL : 42PX4R42PX4R-ZA

website:http://biz.LGservice.come-mail:http://www.LGEservice.com/techsup.html

PRVOLMENUTV/AV OK

- 2 -

CONTENTS

SAFETY PRECAUTIONS ....................................................................................3

DESCRIPTION OF CONTROLS ..........................................................................4

SPECIFICATIONS................................................................................................8

ADJUSTMENT INSTRUCTIONS .......................................................................10

TROUBLE SHOOTING GUIDE..........................................................................14

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

EXPLODED VIEW..............................................................................................24

EXPLODED VIEW PARTS LIST ........................................................................25

REPLACEMENT PARTS LIST...........................................................................26

SCHEMATIC DIAGRAM.........................................................................................

PRINTED CIRCUIT BOARD ..................................................................................

- 3 -

SAFETY PRECAUTIONS

Many electrical and mechanical parts in this chassis have special safety-related characteristics. These parts are identified by inthe Schematic Diagram and Replacement Parts List. It is essential that these special safety parts should be replaced with the same components as recommended in this manual toprevent X-RADIATION, Shock, Fire, or other Hazards. Do not modify the original design without permission of manufacturer.

General Guidance

An isolation Transformer should always be used duringthe servicing of a receiver whose chassis is not isolated fromthe AC power line. Use a transformer of adequate power ratingas this protects the technician from accidents resulting inpersonal injury from electrical shocks.

It will also protect the receiver and it's components from beingdamaged by accidental shorts of the circuitry that may beinadvertently introduced during the service operation.

If any fuse (or Fusible Resistor) in this monitor is blown, replaceit with the specified.

When replacing a high wattage resistor (Oxide Metal FilmResistor, over 1W), keep the resistor 10mm away from PCB.

Keep wires away from high voltage or high temperature parts.

Due to high vacuum and large surface area of picture tube,extreme care should be used in handling the Picture Tube.Do not lift the Picture tube by it's Neck.

Leakage Current Cold Check(Antenna Cold Check)With the instrument AC plug removed from AC source,connect an electrical jumper across the two AC plug prongs.Place the AC switch in the on position, connect one lead ofohm-meter to the AC plug prongs tied together and touch otherohm-meter lead in turn to each exposed metallic parts such asantenna terminals, phone jacks, etc. If the exposed metallic part has a return path to the chassis, themeasured resistance should be between 1MΩ and 5.2MΩ. When the exposed metal has no return path to the chassis thereading must be infinite.An other abnormality exists that must be corrected before thereceiver is returned to the customer.

Leakage Current Hot Check (See below Figure) Plug the AC cord directly into the AC outlet.Do not use a line Isolation Transformer during this check. Connect 1.5K/10watt resistor in parallel with a 0.15uF capacitorbetween a known good earth ground (Water Pipe, Conduit, etc.)and the exposed metallic parts.Measure the AC voltage across the resistor using ACvoltmeter with 1000 ohms/volt or more sensitivity.Reverse plug the AC cord into the AC outlet and repeat ACvoltage measurements for each exposed metallic part. Anyvoltage measured must not exceed 0.75 volt RMS which iscorresponds to 0.5mA.In case any measurement is out of the limits specified, there ispossibility of shock hazard and the set must be checked andrepaired before it is returned to the customer.

Leakage Current Hot Check circuit

1.5 Kohm/10W

To Instrument'sexposed METALLIC PARTS

Good Earth Groundsuch as WATER PIPE,CONDUIT etc.

AC Volt-meter

IMPORTANT SAFETY NOTICE

0.15uF

Remote Control Key Functions- When using the remote control aim it at the remote control sensor of the set.- There's maybe a defect in consecutive operation of remote control in specified brightness according to this set feature.

MODE

TV/AV

DVDVCR

PIP

ZOOM - ZOOM +MUTE

TEXT/ *

SLEEP LIST

I/II

AUDIO

PIP PR -PIP PR + SWAP

PIPINP

STB

ARC

SSM

FAVOURITE

SIZE POSITION INDEX HOLD

TIME REVEAL MIX MODE

Q.VIEW

PSM

VOL PR

MULTIMEDIA

POWER

CABLE

EXIT

MULTIMEDIASelects the Component, RGB or HDMImodes.switches the set on from standby.

PIPSwitches the sub picture on or off.

Selects PIP or DW modes.PIP PR + /-

Selects a programme for the sub picture.SWAP

Alternates between main and sub picture.PIP INPUT

Selects the input mode for the sub picture.SIZE

Adjusts the sub picture size.POSITION

Moves the sub picture to DD / EE or FF / GGdirection.

POWERswitches the set on from standby or off tostandby.

ARC Changes the picture format.

OKaccepts your selection or displays the cur-rent mode.

DD / EE or FF / GGAdjusts menu settings.Selects menu item.

MENUDisplays on screen menus one by one.

Exits the current menu.Memorizes menu changes.

ZOOM - / ZOOM +Enlarges or reduces the main picture size.

TEXT/*These buttons are used for teletext.For further details, see the ‘Teletext’ section.

Note : In teletext mode, the PIP PR +/-,SWAP and PIP INPUT buttons are used for

teletext function.

SSMTo select the sound appropriate to your

viewing programme character.

NUMBER buttons

SLEEPSets the sleep timer. I/II

Selects the language during dual lan-guage broadcast.Selects the sound output.

LISTDisplays the programme table.

TV/AVSelects the TV, AV, Component, RGB or

HDMI modes.switches the set on from standby.

MODESelects another device.

MUTESwitches the sound on or off.

VOL +/- (Volume Up/Down)Increases/decreases sound level.PR +/- (Programme Up/Down)Selects a programme.

PSMAdjusts the factory preset picture accord-ing to the room.

Q.VIEWReturns to the previously viewed pro-gramme.

FAVOURITEselects a favorite programme.

EXITClears all on-screen displays and returnsto TV viewing from any menu.

VCR BUTTONSControls a LG video cassette recorder.

- 4 -

DESCRIPTION OF CONTROLS

- 5 -

Location and Function of Controls

PRVOLMENUTV/AV OK

2 1 3 4 5 6

1. Power ButtonSwitches the set on from standby or off to standby.

2. Remote Control Sensor

3. TV/AV ButtonSelects the TV, AV, Component, RGB or HDMI modes. Switches the set on from standby.

4. MENUDisplays on screen menus one by one.Exits the current menu.Memorizes menu changes.

5. OKAccepts your selection or displays the current mode.

6. DD / EE (Programme Up/Down)Selects a programme or a menu item.Switches the set on from standby.FF / GG (Volume Up/Down)Adjusts the volume.Adjusts menu settings.

7. Power IndicatorIlluminates red in standby mode, Illuminates green when theset is turned on

8. Intelligent EyeAdjusts picture according to the surrounding conditions.

- 6 -

Location and Function of Controls

S-VIDEO

VID

DIO

RL/

AAV5V5

AC INPUT

Antenna

AUDIO AUDIO

L R

VIDEO VIDEO

COMPONENTCOMPONENT AUDIO AUDIO

L R

V VARIABLE ARIABLE AUDIO OUTAUDIO OUT

AUDIO AUDIO

(MONO)(MONO)L R

S-VIDEOS-VIDEO VIDEOVIDEO

AAV4V4

AAV1V1

AAV2V2

AAV3V3

HDMI/DVI(VIDEO) AUDIO INPUT RGB INPUT

RS-232C INPUT(CONTROL/SERVICE)

REMOTECONTROL

1. HDMI(DVI VIDEO) / AUDIO INPUT / RGB INPUTConnect the monitor output socket of the PERSONAL COM-PUTER, DVD or STB to this socket.Note: If you want to use RGB/DVI audio, we strongly recom-mend that you use the cable that has a core, or the EMI Filtercore along with separate cable.

2. CONTROL LOCK / REMOTE CONTROL

3. RS-232C INPUT(CONTROL/SERVICE) PORTConnect to the RS-232C port on a PC.

4. COMPONENT INPUTConnect DVD video outputs to Y, PB, PR of COMPONENTINPUT and audio outputs to Audio sockets of AUDIO INPUT.

AUDIO/VIDEO IN SOCKETS (AV4)Connect the audio/video out sockets of external equipment tothese sockets.S-VIDEO/AUDIO IN SOCKETS Connect the S-VIDEO out socket of an VCR to the S-VIDEOsocket. Connect the audio out sockets of the VCR to the audio sock-ets as in AV4.

5. VARIABLE AUDIO OUTPUT

6. EURO SCART SOCKETConnect the euro scart socket of the VCR to these sockets.Note: If you want to use the EURO scart cable, you have touse the signal shielded Euro scart cable.

7. ANTENNA INPUT

8. POWER CORD SOCKETThis set operates on an AC power. The voltage is indicated onthe Specifications page. Never attempt to operate the set onDC power.

9. AUDIO/VIDEO INPUT (AV5)S-VIDEO/AUDIO IN SOCKETS

1 42 3 6 75 8

- Shown is a simplified representation of the set.- Here shown may be somewhat different from your set.- This manual explains the features available on the 42PX4RV series / RT-42PX40 series.

- 7 -

AS mark

LG TV

Owner’s Manual

1.5V1.5V

Alkaline batteries Power Cord

MODE

TV/AV

DVDVCR

PIP

ZOOM - ZOOM +MUTE

TEXT/ *

SLEEP LIST

I/II

AUDIO

PIP PR -PIP PR + SWAP

PIPINP

STB

ARC

SSM

FAVOURITE

SIZE POSITION INDEX HOLD

TIME REVEAL MIX MODE

Q.VIEW

PSM

VOL PR

MULTIMEDIA

POWER

CABLE

EXIT

Remote Control handset

- Optional extras can be changed or modified for quality improvement without any notification new optional extras can beadded.

- Contract your dealer for buying these items.

Optional Extras

Accessories

Tilt wall mounting bracket Video cables Audio cablesCeiling mounting bracket

4250

- Secure the set assembly by joinning it to a wall by using the Eye Bolts/Wall brackets.

Joinning the set assembly to the wall to protect the set tumbling

• After the set must be mounted on a desktop, install the Eye Bolts on the set asshown.Insert the 2 Eye Bolts and tighten securely, in the holes on the bracket. Install the wall brackets on the wall with 2 bolts, (not supplied with the product),as shown.Match the height of the Eye Bolts and the wall brackets. Check to be sure the brackets are tightened securely.

• Secure the set assembly to the wall with strong strings or wound wire cables,(not supplied with the product), as shown.

2-Wall brackets

2-Eye Bolts

SPECIFICATIONSNOTE : Specifications and others are subject to change without notice for improvement.

- 8 -

V Application RangeThis spec is applied to the 42”PDP TV used MF-056A Chassis.

V Specification

Each part is tested as below without special appointment.1) Temperature : 25±5°C (77±9°F), CST : 40±52) Relative Humidity: 65±10%3) Power Voltage: Standard Input voltage (100-240V~, 50/60Hz)

* Standard Voltage of each product is marked by models.4) Specification and performance of each parts are followed each drawing and specification by part number in accordance with BOM.5) The receiver must be operated for about 20 minutes prior to the adjustment.

V Test Method1) Performance : LGE TV test method followed.2) Demanded other specification

Safety: CE, IEC specificationEMC : CE, IEC

V General Specification

1. General Specification

Remark

Safety : IEC/EN60065, EMI : EN55013, EMS : EN55020

Model Name

42PX4R-ZA

Market

Remark

PDP

Glass/Film type is TBD

LGE SPEC

Maker : SONY/ Sanken

Specification

42 inch wide Color Display Module

16:9

PDP42X2##2#,

RGB Closed Type, Glass Filter

1) Temp : 0~40 deg

2) Humidity : 0~85%

1) Temp : -20~60 deg

2) Humidity : 0~85%

100-240V~, 50/60Hz

Item

Display Screen Device

Aspect Ratio

PDP Module

Operating Environment

Storage Environment

Input Voltage

2. Model Specification

- 9 -

Item

Market

Broadcasting system

Available Channel

Receiving system

Scart Jack(3EA)

Video input(2EA)

S-Video Input(3EA)

Component Input(1EA)

RGB Input(1EA)

HDMI Input(1EA)

Audio Input(4EA)

Wired Control

Audio variable out(1EA)

Specification

PAL B/G/I/D/K, NTSC

BAND PAL NTCS

VHF/ UHF C1~C69 2~83

CATV S1~S47 1~71

Upper Heterodyne

PAL, SECAM, NTSC

Y/Cb/Cr, Y/Pb/Pr

RGB-PC

RGB-DTV

HDMI-PC

HDMI-DTV

PC Audio, Component(1EA), AV(2EA)

Remark

4 System : PAL, SECAM, NTSC,PAL60

L/R Input

- 10 -

ADJUSTMENT INSTRUCTIONS

1. Application ObjectThese instructions apply to the MF-056A Chassis.

2. Specification(1) Because this is not a hot chassis, it is not necessary to use

an isolation transformer. However, the use of isolationtransformer will help protect test instrument.

(2) Adjustment must be done in the correct order.(3) The adjustment must be performed in the circ*mstance of

25±5°C of temperature and 65±10% of relative humidity ifthere is no specific designation.

(4) The input voltage of the receiver must keep 100-220V,50/60Hz.

(5) The receiver must be operated for about 15 minutes priorto the adjustment.

O After RGB Full white HEAT-RUN Mode, the receiver mustbe operated prior to adjustment.

O Enter into HEAT-RUN MODE1) Press the POWER ON KEY on R/C for adjustment.2) OSD display and screen display 100% full WHITE

PATTERN.

[ Set is activated HEAT-RUN without signal generator inthis mode.

[ Single color pattern(RED/BLUE/GREEN) of HEAT-RUN mode uses to check PANEL.

Caution) If you turn on a still screen more than 20 minutes(Especially digital pattern, cross hatch pattern), afterimage may be occur in the black level part of thescreen.

3. Channel memory

3-1. Setting up the LGIDS1) Install the LGIDS. (idsinst.exe)2) After installation, restart your PC.3) Extract [files.zip] to folder [c:\LGIDS\files].4) Start LGIDS.

3-2. Channel memory Method 1) Select “PDP” and “Hurricane” on Model dialog. And check

your connection in Communication dialog. (If yourconnection is ‘NG’, then set your PORT(COM1,2,3,...)correctly.)

2) Connect RS-232C cable and turn on the power.(If your connection has completed, you can see “Ready”.)

[ If your set is not an end products but only a board, youhave to make your board to Stand-by state (LED_R). Andyou have to Download in Stand_by power state.

3) Select proper CH_memory file(*.nvm) for each model at[NVRAM Download] $ [Write Batch]Next, select proper binary file(*.bin) including the CHinformation for each model at [NVRAM File].

4) Click the [Download] button.It means the completion of the CH memory download if allitems show ‘OK’ and Status is changed by ‘PASS’ at thelower right corner of the window.

5) If you want to check whether the CH information ismemorized correctly or not, click the [Verify] button. And then compare NVRAM File(*.bin) with the CHinformation downloaded.

3-3 Sub program download

1) Select “PDP” and “Hurricane” on Model dialog. And checkyour connection in Communication dialog. (If yourconnection is ‘NG’, then set your PORT(COM1,2,3,...)correctly.)(Fig. 1)

(Fig. 3)

(Fig. 3-1)

- 11 -

2) Connect RS-232C cable and turn on the power. (Use thespecial Cable For Sub-program) (If your connection hascompleted, you can see “Ready”)

4. POWER PCB Assy V oltage Adjustments (Va, Vs Voltage Adjustments)

4-1. Test Equipment : D.M.M. 1EA

4-2. Adjustment Method[P/No 3501V00220A(Sanken PSU) B/D]

(1) Va Adjustment1) After receiving 100% Full White Pattern, HEAT RUN.2) Connect + terminal of D.M.M to Va pin of P807, connect

- terminal to GND pin of P807.3) After turning RV501, voltage of D.M.M adjustment as

same as Va voltage which on label of panel right/top.(Deviation; ±0.5V)

(2) Vs Adjustment1) Connect + terminal of D.M.M to Vs pin of P807, connect

– terminal to GND pin of P805.2) After turning RV401, voltage of D.M.M adjustment as

same as Va voltage which on label of panel right/top.(Deviation; ±0.5V)

5. EDID (The Extended DisplayIdentification Data)/ DDC (DisplayData Channel) download

5-1. Required T est Equipment1) Adjusting PC with S/W for writing EDID Data.(S/W : EDID

TESTER Ver.2.5)2) A Jig for EDID Download3) Cable : Serial(9Pin or USB) to D-sub 15Pin cable, D-sub

15Pin cable, DVI to HDMI cable

5-2. Setting of device

5.3. Preparation for Adjustment1) As above Fig. 5, Connect the Set, EDID Download Jig, PC

& Cable.2) Turn on the PC & EDID Download Jig. And Execute the

S/W : EDID TESTER Ver,2.53) Set up S/W option

Repeat Number : 5Device Address : A0PageByte : 8

4) Power on the Set

5.4. Sequence of Adjustment

(1) DDC data of Analog-RGB1) Init the data

2) Load the EDID data.(Open File)[Analog-RGB : MF056A_RGB.ANA][digital(HDMI) : MF056A_DMI.DVI]

3) Set the S/W as below.4) Push the “Write Data & Verify”button. And confirm “Yes”.5) If the writing is finished, you will see the “OK” message.

Each PCB assembly must be checked by check JIG set.(Because power PCB Assembly damages to PDP Module,especially be careful)

(Fig. 4) Connection diagram of power adjustment for measuring

(Fig. 5) Connection Diagram of DDC download

- 12 -

6. Auto A V(CVBS) Color Balance

6-1. Required- This AV color balance adjustment should be performed beforwhite Balance Adjustment

6-2. Required Equipment1) Remote controller for adjustment2) AV Pattern Generator

: 802F Pattern Generator, Master(MSPG-925FA), etc(Which has PAL Composite Video format output withstandard(1.0 Vpp) Vertical 100% Color Bar Pattern as Fig6)

6-3. Method of Auto Color Balance1) Input the PAL Composite Video (Fig6. 100% Color Bar

Pattern) into video input.(42PX4RV-TA : AV1/AV2 Input 50Hz,42PX4RV-ZA : AV4/AV5 Input)

2) Set the PSM to Standard mode in Picture menu.3) Press INSTAR key on R/C for adjustment.4) Press the G (Vol. +) key operate to set, then it becomes

automatically.5) Auto-RGB OK means completed adjustment.

7. Adjustment of White Balance

7-1. Required Equipment1) Remote controller for adjustment2) Color Analyzer (CA-100 or same product)3) Auto W/B adjustment instrument(only for auto adjustment)4) AV Pattern Generator

7-2. Connecting diagram of equipment formeasuring (For Auto Adjustment)

W Auto adjustment Map(RS-232C)

7-3. Adjustment of White Balance

O Operate the zero-calibration of the CA-100, then sticksensor to PDP module surface when you adjust.

O For manual adjustment, it is also possible by the followingsequence.

1) Select white pattern of heat-run mode by pressing poweron key on remote control for adjustment then operate heatrun more than 15 minutes.

2) As below Fig.7-1, Supply 216Level (85 IRE) full screenpattern to Video input.(42PX4RV-TA : AV1/AV2 INPUT 50Hz,42PX4RV-ZA : AV4/AV5 INPUT)

3) Press the TV/AV KEY on R/C for converting input mode.4) Set the PSM to Standard mode in Picture menu.5) Enter the White Balance adjustment mode by pressing the

INSTART key twice(White Balance) on R/C.6) Stick sensor to center of the screen and select each items

(Red/Green/Blue Gain and offset) using D / E (CH +/-) keyon R/C.

7) Adjust Only High Light with R Gain/ B Gain using F / G(VOL+/-) key on R/C.

8) Adjust it until color coordination becomes as below.(High Light G Gain : 7A // Low Light R Offset : 7F, G Offset7E, B Offset 80 is Fixed)[MF-056A : 42PX4RV-TA/ZA] - VGA 42”Bright : High Light : 80 ± 20cdColor-Coordinate : High Light : X : 0.285 ± 0.003

Y : 0.295 ± 0.003Color Temperature : 9,300°K ± 500°K

9) When adjustment is completed, Exit adjustment modeusing EXIT key on R/C

(Fig. 7-1) Pattern for Adjustment of White Balance

Win

CV BS si gnal i npu

COL OR

A NA L YZER

T YPE; CA-100

PDP MONIT OR

High Light adjust

L ow L ight adj ust

Type

Baud Rate

115200

Index

R Gain

G Gain

B Gain

R Offset

G Offset

B Offset

Data bit

Cmd1 Cmd2

j a

j b

j c

j d

j e

j f

Stop bit

Parity

NONE

MF-056A : RT-42PX40/ RZ-42PX40

ProtocolSetting

Data Min Value

00(00)

Max Value

255(FF)

(Fig. 6) Auto AV(CVBS) Color Balance Test Pattern

(Fig. 7) Connection Diagram of Auto W/B adjustment

- 13 -

8. Auto Component Color Balance

8-1. Required T est Equipment1) Remote controller for adjustment2) 802F Pattern Generator

(Which has 720p Ypbpr output & PC 1024x768 60Hz withStandard(0.7Vpp) Vertical 100% Color Bar Pattern as Fig.8)

8-2. Method of Auto Component Color Balance1) Input the Component 720p 100% Color Bar signal into

Component1 or Component2.2) Set the PSM to Standard mode in Picture menu.3) Press INSTART key on R/C for adjustment.4) Press the G (Vol. +) key operate To set, then it becomes

automatically.5) Auto-RGB OK means complete adjustment

9. Auto RGB Color Balance

9-1. Required T est Equipment1) Remote controller for adjustment2) 802F Pattern Generator, Master (MSPG-925FA), etc.

(Which has XGA 60Hz PC Format output with standard(0.7Vpp) horizontal black and white pattern as Fig.10)

9-2. Method of Auto RGB Color Balance1) Input the PC 1024x768 60Hz horizontal black and white

pattern into RGB.2) Set the PSM to Standard mode in Picture menu.3) Press ADJ key on R/C for adjustment.4) Press the G (Vol. +) key operate To set, then it becomes

automatically.5) Auto-RGB OK means completed adjustment.

9. Default V alue in Adjustment mode

9-1. Auto Color Balance (Component/RGB)

9-2. White Balance

Level : 0

Level : 255

(Fig. 9) Auto RGB Color Balance Test Pattern

(Fig. 10) Default Value on OSD

(Fig. 10-1) Default Value on OSD

Auto Color Balance(HEX)

Auto-RGB G To SetRed Offset1 80Green Offset1 80Blue Offset1 80Red Offset2 80Green Offset2 80Blue Offset2 80Red Gain 80Green Gain 80Blue Gain 80Reset G To Set

White Balance(Hex)

Red Gain 80Red Offset 80Green Gain 80Green Offset 80Blue Gain 80Blue Offset 80Reset G To Set

(Fig. 8) Auto Component Color Balance Test Pattern

- 14 -

TROUBLE SHOOTING GUIDE

1. Power Board

1-1. The whole flowchart which it follows in voltage output state

Start check

Manufacture enterprisemeaning of a passage

1. Check the Power Offcondition.

Doesn't the screen whole come

out?

Is it identical with Power Off

condition?

Yes

2. Check the Interfacesignal condition.

Is the Interface signal operated?

Yes

3. Check the St-by 5Vsignal circuit.

Doesn't the low pressure output

come out?

Doesn't the St-by 5V signal

come out?

Yes

4. Check the 5V Monitorsignal circuit.

Doesn't the 5V Monitor signal

come out?

Yes

7. Check the VSC Vs-ONsignal

Doesn't the high tension output

come out?

Doesn't the VSC signal Vs-ON

come out?

Yes

Doeshigh tension

output voltage Dropoccur?

When theY B/D Module

input connector isremoved, does output

voltage dropoccur?

When theY, Z B/D Module

input connector is remove,does Power Board hightension

output voltage Dropoccur?

Yes No No

9. Check the PowerBoard Output high

tension circuit

Yes

10. Check the Z B/DModule output circuit

Yes

When theZ B/D Module

input connector isremoved, does output

voltage Drop occurs?

11. Check the Y B/DModule output circuit

Yes

8. Check the Vs, Vavoltage output circuit.

Doesn't the Vs, Va voltage output

come out?

Yes

5. Check the VSC RL-ONsignal.

Doesn't the VSC signal RL-ON

come out?

Yes

6. Check the VSC lowpressure output

Doesn't the VSC low pressureoutput come out?

Yes

- 15 -

1-2. Sony Power Board Structure

1 2 3

T502: Vs Trans

T702: Va Trans

T101: St-by Trans

T103: Low Voltage Trans

- 16 -

1-3. Sanken, LGIT Power Board Structure

1 2 3

T221: Vs Trans

T271: Va Trans

T121: St-by Trans

T201: Low Voltage Trans

- 17 -

2. No Power

(1) Symptomfl Does’t minute discharge at module. fl Non does not come in into the front LED.

(2) Check following

Is plug in power cord? Plug in power cord.

Yes

Is the Line Filter and PowerBoard Cable connected?

Connect the Cable.

Yes

Is the Fuse(F101) onPower Board normal?

Replace the Fuse.

Yes

Is the Power Board and 7P ofVSC Board Cable connected?

Connect the Cable.

Yes

After the cable connect is remvedto Power Board(except the CN101connection cable), the AC voltagemarking is authorized on manual.When ST-BY 5V is not operated,replace Power Board.