Sharp LC-32AX5M/M/X Schematic

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LC-32AX5H/M/X

SERVICE MANUAL

No. S76V3LC32AX5M

LCD COLOUR TELEVISION

MODELS

In the interests of user-safety (Required by safety regulations in some countries) the set should be restored to its original condition and only parts identical to those specified should be used.

LC-32AX5H/M/X

CONTENTS

SAFETY PRECAUTION

IMPORTANT SERVICE SAFETY

PRECAUTION.....................................................i

Precautions for using lead-free solder ...............ii

CHAPTER 1. SPECIFICATIONS

[1] SPECIFICATIONS ......................................... 1-1

CHAPTER 2. OPERATION MANUAL

[1] OPERATION MANUAL .................................. 2-1

CHAPTER 3. DIMENSIONS

[1] DIMENSIONS ................................................ 3-1

CHAPTER 4. REMOVING OF MAJOR PARTS

[1] REMOVING OF MAJOR PARTS ................... 4-1

CHAPTER 5. ADJUSTMENT PROCEDURE

[1] ADJUSTMENT PROCEDURE ....................... 5-1

[2] PUBLIC MODE SETTING PROCEDURE........ 5-6

CHAPTER 7. MAJOR IC INFORMATIONS

[1] MAJOR IC INFORMATIONS .........................7-1

CHAPTER 8. OVERALL WIRING DIAGRAM/BLOCK DIAGRAM

[1] OVERALL WIRING DIAGRAM......................8-1

[2] BLOCK DIAGRAM.........................................8-3

CHAPTER 9. PRINTED WIRING BOARD

[1] OPERATION UNIT PRINTED WIRING

BOARD..........................................................9-1

[2] LED, R/C UNIT PRINTED WIRING

BOARD..........................................................9-2

[3] MAIN UNIT PRINTED WIRING BOARD........9-3

[4] SUB UNIT PRINTED WIRING BOARD ....... 9-11

CHAPTER 10. SCHEMATIC DIAGRAM

[1] DESCRIPTION OF SCHEMATIC DIA-

GRAM..........................................................10-1

[2] SCHEMATIC DIAGRAM..............................10-2

CHAPTER 6. TROUBLESHOOTING TABLE

[1] TROUBLESHOOTING TABLE....................... 6-1

Parts marked with " " are important for maintaining the safety of the set. Be sure to replace these parts with specified ones for maintaining the safety and performance of the set.

Parts Guide

This document has been published to be used for after sales service only. The contents are subject to change without notice.

LC-32AX5H/M/X

LC-32AX5M

SAFETY PRECAUTION

Service Manual

IMPORTANT SERVICE SAFETY PRECAUTION

Service work should be performed only by qualified service technicians who are thoroughly familiar with all safety checks and the servicing guidelines which follow:

WARNING

1. For continued safety, no modification of any circuit should be attempted.

2. Disconnect AC power before servicing.

BEFORE RETURNING THE RECEIVER (Fire & Shock Hazard)

Before returning the receiver to the user, perform the following safety checks:

3. Inspect all lead dress to make certain that leads are not pinched, and check that hardware is not lodged between the chassis and other metal parts in the receiver.

4. Inspect all protective devices such as non-metallic control knobs, insulation materials, cabinet backs, adjustment and compartment covers or shields, isolation resistor-capacitor networks, mechanical insulators, etc.

5. To be sure that no shock hazard exists, check for leakage current in the following manner.

• Plug the AC cord directly into a 110 ~ 240 volt AC outlet.

• Using two clip leads, connect a 1.5k ohm, 10 watt resistor paralleled by a 0.15µF capacitor in series with all exposed metal cabinet parts and a known earth ground, such as electrical conduit or electrical ground connected to an earth ground.

• Use an AC voltmeter having with 5000 ohm per volt, or higher, sensitivity or measure the AC voltage drop across the resistor.

• Connect the resistor connection to all exposed metal parts having a return to the chassis (antenna, metal cabinet, screw heads, knobs and control shafts, escutcheon, etc.) and measure the AC voltage drop across the resistor. All checks must be repeated with the AC cord plug connection reversed. (If necessary, a non polarized adaptor plug must be used only for the purpose of completing these checks.) Any reading of 0.74 Vrms (this corresponds to 0.5 mA rms AC.) or more is excessive and indicates a potential shock hazard which must be corrected before returning the monitor to the owner.

DVM

AC SCALE

1.5k ohm 10W

0.15µF

TEST PROBE

TO EXPOSED METAL PARTS

CONNECT TO KNOWN EARTH GROUND

///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////

SAFETY NOTICE

Many electrical and mechanical parts in LCD color television have special safety-related characteristics. These characteristics are often not evident from visual inspection, nor can protection afforded by them be necessarily increased by using replacement components rated for higher voltage, wattage, etc. Replacement parts which have these special safety characteristics are identified in this manual; electrical components having such features

are identified by " " and shaded areas in the Replacement Parts Lists and Schematic Diagrams.

For continued protection, replacement parts must be identical to those used in the original circuit.

The use of a substitute replacement parts which do not have the same safety characteristics as the factory recommended replacement parts shown in this service manual, may create shock, fire or other hazards.

LC-32AX5H/M/X

Precautions for using lead-free solder

Employing lead-free solder

• “All PWBs” of this model employs lead-free solder. The LF symbol indicates lead-free solder, and is attached on the PWBs and service manuals. The alphabetical character following LF shows the type of lead-free solder.

Example:

L Fa

Indicates lead-free solder of tin, silver and copper.

L F a/a

Using lead-free wire solder

• When fixing the PWB soldered with the lead-free solder, apply lead-free wire solder. Repairing with conventional lead wire solder may cause damage or accident due to cracks.

As the melting point of lead-free solder (Sn-Ag-Cu) is higher than the lead wire solder by 40 °C, we recommend you to use a dedicated soldering bit, if you are not familiar with how to obtain lead-free wire solder or soldering bit, contact our service station or service branch in your area.

Soldering

• As the melting point of lead-free solder (Sn-Ag-Cu) is about 220 °C which is higher than the conventional lead solder by 40 °C, and as it has poor solder wettability, you may be apt to keep the soldering bit in contact with the PWB for extended period of time. However, Since the land may be peeled off or the maximum heat-resistance temperature of parts may be exceeded, remove the bit from the PWB as soon as you confirm the steady soldering condition.

Lead-free solder contains more tin, and the end of the soldering bit may be easily corroded. Make sure to turn on and off the power of the bit as required.

If a different type of solder stays on the tip of the soldering bit, it is alloyed with lead-free solder. Clean the bit after every use of it. When the tip of the soldering bit is blackened during use, file it with steel wool or fine sandpaper.

• Be careful when replacing parts with polarity indication on the PWB silk.

Lead-free wire solder for servicing

Part No. Description Code

ZHNDAi123250E J φ0.3mm 250g (1roll) BL ZHNDAi126500E J φ0.6mm 500g (1roll) BK ZHNDAi12801KE J φ1.0mm 1kg (1roll) BM

LC-32AX5H/M/X

LC-32AX5M

CHAPTER 1. SPECIFICATIONS

[1] SPECIFICATIONS

Service Manual

Item

Model

LCD panel 32" (80 cm) Advanced Super View & BLACK TFT LCD

Number of dots 3,147,264 dots (1366 768 3 dots)

Video Colour System PAL/SECAM/NTSC 3.58/NTSC 4.43/PAL 60

TV Function

Brightness 450 cd/m

Viewing angles H : 176° V : 176°

Audio amplifier 10W 2

Speakers Ø 6.5 cm 4pcs

Terminals

OSD language English/Chinese English/Chinese/Arabic

Power Requirement

Power Consumption 158 W (0.8 W Standby) (Method IEC60107)

Weight 17.4 kg (without stand) 20.7 kg (with stand)

Operating Temperature 0°C - 40°C

Receiving Channel

TV-Tuning System

STEREO/BILINGUAL NICAM: B/G, I, D/K A2 stereo: B/G

Rear

Front

VHF/UHF 44.25-863.25 MHz

CATV

ANTENNA IN

INPUT 1

INPUT 2

INPUT 3 HDMI (HDMI input) (480P, 580P, 1080I/50Hz, 1080I/60Hz, 720P/60Hz), AUDIO in

MONITOR OUTPUT

RS-232C 9 pin D-sub male connector

Headphones Ø 3.5mm jack (Audio output)

PAL: B/G, D/K, I SECAM: B/G, D/K, K/K

S1–S41ch (including Hyperband)

Auto Preset 99 ch

UHF/VHF 75 DIN type

VIDEO in, AUDIO in, COMPONENT in (480I, 580I, 480P, 580P, 1080I/50Hz, 1080I/60Hz, 720P/60Hz)

VIDEO in, AUDIO in

VIDEO out, AUDIO out

AC 110–240 V, 50 Hz

LC-32AX5H LC-32AX5M LC-32AX5X

1 NTSC: MTV-Standard

As a part of policy of continuous improvement, SHARP reserves the right to make design and specification changes for product improvement without prior notice. The performance specification figures indicated are nominal values of production units. There may be some deviations from these values in individual units.

Optional accessory

The listed optional accessory is available for the LCD colour TV.

Part name Part number

Wall mount bracket AN-37AG2

Please purchase it at your nearest shop.

Additional optional accessories may be available in the near future. When purchasing, please read the newest catalogue for compatibility and check the availability.

1 – 1

LC-32AX5M

CHAPTER 2. OPERATION MANUAL

[1] OPERATION MANUAL

LC-32AX5H/M/X

Service Manual

AC INPUT ter m inal

TV (Rear)

TV/VIDEO button

POWER (On/Off) button

RS-232C terminal

terminals

INPUT 3 (HDMI)

INPUT 1 ter m inals

INPUT 2 ter m inals

Antenna input ter m inal

terminals

MONITOR OUTPUT

*OPC: Optical Picture Control

Headphone jack

OPC indicator*

SLEEP timer indicator

Volume display when headphones are plugged in

TV (Front)

Part names

Channel up ( )/down ( ) buttons

Volume up (+)/down (–) buttons

2 – 1

Remote control sensor

OPC sensor

POWER indicator

Regarding the headphone jack

3.5 mm).

• Use headphones with a stereo mini plug (

not in use.

plugged in.

headphones.•source.

• The speakers do not output volume when headphones are

You can set the volume to different levels for each input

• Audio adjustments do not affect the audio of connected

• Be sure to unplug headphones from the jack when they are

LC-32AX5H/M/X

Part names

LC-32AX5M/X

Remote control unit

(Reveal hidden for

TELETEXT)

TELETEXT mode: Display hidden

characters.

(TELETEXT)

Select the TELETEXT mode. (all TV

image, all TEXT image, TV/TEXT

image)

(Top/Bottom/Full)

(SUBTITLE for TELETEXT)

To turn the subtitles on and off.

(Hold)

POWER (STANDBY/ON)

To switch the power on and off.

TELETEXT mode: Set the area of

magnification.

again to release the hold mode.

TELETEXT mode: Stop updating

Teletext pages automatically. Press

(Subpage)

Display the Teletext subpage

directly.

0–9

Set the channel.

TELETEXT mode: Set the page.

TV/VIDEO (INPUT SOURCE)

Select an input source. (TV, INPUT

1, INPUT 2, INPUT 3)

(Flashback)

Press to return to the previous image

in normal viewing mode.

OPC

WIDE

To switch Optical Picture Control

Change the wide image mode.

on and off.

FREEZE

AV MODE

Freeze a motion picture on the

screen.

DISPLAY

Display the programme

information.

MPX

CH /CH

VOL /VOL

TV input mode: Select the channel.

TELETEXT mode: Select the page.

SLEEP

(MUTE)

Set the Sleep timer.

INPUT3

Directly select and output the

INPUT2

signal from the INPUT3 terminal.

Display the menu screen.

INPUT1

ENTER

Execute a command.

(Cursor)

///

RETURN

MENU mode: Return to the

previous menu screen.

EXIT

Colour (RED/GREEN/YELLOW/

BLUE)

TELETEXT mode: Select a page.

NOTE

Select a video setting: AV MODE

(STANDARD, MOVIE, GAME, USER,

DYNAMIC)

Select the sound multiplex mode.

Set the volume.

Mute the sound.

Directly select and output the signal

from the INPUT2 terminal.

Directly select and output the signal

from the INPUT1 terminal.

Select a desired item on the setting

screen.

Return to the default screen.

• When using the remote control unit, point it at the TV.

Part names

LC-32AX5H

Remote control unit

0–9

Set the channel.

POWER (STANDBY/ON)

To switch the power on and off.

TV/VIDEO (INPUT SOURCE)

Select an input source. (TV, INPUT

1, INPUT 2, INPUT 3)

(Flashback)

Press to return to the previous image

in normal viewing mode.

DISPLAY

Display the programme information.

MPX

Select the sound multiplex mode.

CH /CH

VOL /VOL

Select the channel.

Set the volume.

SLEEP

Set the Sleep timer.

(MUTE)

Mute the sound.

2 – 2

Display the menu screen.

INPUT3 (HDMI)

Directly select and output the

signal from the INPUT3 terminal.

ENTER

Execute a command.

(Cursor)

///

Select a desired item on the setting

screen.

RETURN

MENU mode: Return to the

previous menu screen.

EXIT

Return to the default screen.

OPC

WIDE

To switch Optical Picture Control

on and off.

Change the wide image mode.

AV MODE

Select a video setting: AV MODE

(STANDARD, MOVIE, GAME, USER,

FREEZE

screen.

Freeze a motion picture on the

DYNAMIC)

NOTE

• When using the remote control unit, point it at the TV.

LC-32AX5M

CHAPTER 3. DIMENSIONS

[1] DIMENSIONS

LC-32AX5H/M/X

Service Manual

Unit: mm

671

653

59063

700

815

200

100 120

394.5

399

306

200

100

3 – 1

LC-32AX5H/M/X

LC-32AX5M

CHAPTER 4. REMOVING OF MAJOR PARTS

Service Manual

[1] REMOVING OF MAJOR PARTS

1. Detach the Terminal Cover [1].

2. Detach the 2 BUS Covers [2].

3. Remove the 1 screw [3] and detach the Hinge Cover.

4. Remove the 4 screws [4] and detach the Stand.

5. Remove the 3 screws [5], 4 screws [6] and the 12 screws [7]. Detach the Rear Cabinet.

[7]

BUS

[2]

Cover

[5]

Terminal

[1]

Cover

[6]

[5]

[3]

[6]

[4]

Rear Cabinet

Stand

Hinge Cover

4 – 1

6. Detach the Stand Base Cover [8].

7. Remove the 4 screws [9]. Detach the SUS Angle-L and SUS Angle-R.

8. Disconnect the 2 Connectors [10]. Remove speaker wire from wire holder [10A].

9. Remove the 5 screws [11] and detach the Chassis Angle Bottom C.

10.Remove the Speaker Box L and Speaker Box R [12].

LC-32AX5H/M/X

[9]

SUS Angle-L

SUS Angle-R

[9]

[12]

Speaker Box R

[10]

[10A] Wire holder

Chassis Angle Bottom C

[8]

Stand Base Cover

[10]

[11]

[12]

Speaker Box L

4 – 2

LC-32AX5H/M/X

11.Remove all the connectors from all the PWBs.

12.Remove the 2 screws [13] and detach the Top Control Cover Ass'y. Remove the 2 screws [14] and detach the OPERATION PWB Unit from Top Control Cover Ass'y.

13.Remove the 2 screws [15] and detach the LED,R/C PWB Unit.

14.Remove the 2 screws [16] and detach the Side Hole Cover.

[13]

Top Control Cover Ass'y

OPERATION PWB Unit

[14]

Side Hole Cover

[15]

VD RA

PD PE

LED,R/C PWB Unit

[KM]

CN2

CN1

CN3

[16]

4 – 3

15.Remove the 1screw [17] and detach the Tuner Cover.

16.Remove the 5 screws [18] and detach Chassis Tray.

17.Remove the 2 screws [19] and the 1 screw [20]. Detach the AV Terminal Cover.

18.Remove the 8 screws [21] and the 1PWB holder C [21A], and detach the POWER PWB Unit from Chassis Tray.

19.Remove the 6 screws [22] and detach the SUB PWB Unit from Chassis Tray.

20.Remove the 3 screws [23] and detach the MAIN PWB Unit from SUB PWB Unit.

LC-32AX5H/M/X

[23]

AIN PWB

nit

[18]

[20]

[19]

AV Terminal Cover

[22]

Tuner Cover

[17]

SUB PWB Unit

[18]

[21A] PWB Holder C

POWER PWB Unit

[21]

Chassis Tray

4 – 4

LC-32AX5H/M/X

21.Remove the 4 screws [24] and take out the LCD Panel from Front Cabinet.

22.Remove the 11 screws [25] and detach the Chassis Angles.

[25]

[24]

Chassis Angle Bottom R

[25]

Chassis Angle Top-C

[24]

Chassis Angle Bottom L

[24]

[25]

Chassis Angle TopChassis Angle Top

[25]

4 – 5

LC-32AX5H/M/X

LC-32AX5M

CHAPTER 5. ADJUSTMENT PROCEDURE

Service Manual

[1] ADJUSTMENT PROCEDURE

The adjustment values are set to their optimum at the factory before shipping. If by any chance a value should become improper or a readjustment is required due to part replacement, make an adjustment according to the following procedure.

Before adjustment, perform aging for approx. 60 minutes to stabilize the unit.

1. Entering the adjustment process mode

While holding down the TV/VIDEO and Volume DOWN keys at the same time, set the Power switch to ON. (“K” standing for inspection process

mode is displayed in the upper left portion of the screen.) → Press the Channel DOWN and Volume DOWN keys at the same time. (The adjustment process mode screen appears.)

To cancel it, turn off the power using the Power switch or remote control.

2. Key operation in the adjustment process mode

1. Basic operations

• Tune in to a station using the Channel UP/DOWN keys.

• Switch the input using the TV/VIDEO key.

• Select an item to adjust using the Cursor / keys. (Pressing the Cursor key while at the bottom item moves to the top item on the

next page, and pressing the Cursor key while at the top item moves to the bottom item on the previous page.)

• Adjust the item selected using the Volume +/– or Cursor / keys.

• Press the Menu key to move to the next item. (Pressing the Menu key while at the bottom item moves to the top item on the next page.)

2. Layer movement

• Pressing the ENTER key while at an item other than I2C DATA and HOTEL POWERFIX on page 2 moves to the setting page of that item

name.

• Press the Flashback key to exit each setting page.

3. Initialization

3-1 Connect the pins 81 and 82 of IC2001 (microprocessor), then turn on the power. 3-2 Check MODEL (A648MB). 3-3 Check INCH SIZE.

MODEL INCH SIZE

LC-32AX5H/M/X 32

(Screen of adjustment process menu page 1)

123

M1ODE

INCH

ERROR

PUBL

HDCP

HDC

EXTTCONTROL

4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26

LA648MB

SIZE 32

NO RESE T

IC MODE OFF

40H 80

PRESETMODE 0

OFF

5 – 1

LC-32AX5H/M/X

4. Adjustment

4.1. AD converter level adjustment

1. 1080i input

Adjustment Conditions Adjustment Procedure

1) 1080i 75% colour bar signal input Used device name: LEADER LT448 Signal name: COLOUR BAR * Use the LT-448-compatible third one of three color bars. Setting value: 02: 1080i/59.93 (30 sF) H: 33.72 kHz, V: 29.97 Hz

2. 480i input

Adjustment Conditions Adjustment Procedure

1) 480i 75% colour bar signal input Used device name: LEADER LT448 Signal name: COLOUR BAR * Use the LT-448-compatible third one of three color bars. Setting value: 15: 480i/60 H: 15.73 kHz, V: 29.97 Hz

1) Set AUTO GAIN-OFFSET on page 3 (M2-HD) of the adjustment process DVP hierarchy to ON.

1) Set AUTO GAIN-OFFSET on page 4 (M2-SD) of the adjustment process DVP hierarchy to ON.

* If all the items are set to ON, “RUN” is displayed during adjustment.

5 – 2

LC-32AX5H/M/X

4.2. TAMP adjustment

Adjustment Conditions Adjustment Procedure

1) Receive the PAL standard color bar signal. 1) If the maximum value of “PAL TAMP1” on page 1 of adjustment process DVP hierarchy is not in the range of values in the list below, adjust “PAL TAMP1” on the same page so that the maximum value of “Y” is in the range of values in the list below. * Note that the setting value may vary by model.

2) When pressing the TAMP1 direct keys, adjustment of “PAL TAMP1” is complete. Then, The values of “NTSC TAMP1” and “SECAM TAMP1” are automatically set. (NTSC: Value of PAL –7, SECAM: The same value as PAL)

MODEL 32AX5

Setting value 101 ~ 105

Reference (Screen of page 1 of adjustment process menu DVP hierarchy)

DVP

1 2 3 4 5 6 7 8 9 10111213141516 1718192021 22 23242526

TAM 1L 10 1

YDA AT

TAM 1HP

NTS TAMP1C

PAL TAMP 1

103

105

CAM T AMP 1SE

5 – 3

LC-32AX5H/M/X

4.3. White balance adjustment

1. White balance adjustment procedure

Adjust the white 144 gradation using RGB CUTOFF2 and then the white 73 gradation with RGB-GAIN.

1) Test signal adjustment

[Input signal] Display the WB test signals with built-in DVP of white 56% (144 gradations) and 29% (73 gradations) on the left and right of

[Adjustment value] Page 2 of adjustment process menu DVP hierarchy: RGB CUTOFF2, RGB-GAIN

the screen respectively by using the remote control code “011110010001010”.

Adjustment spec Inspection spec

White 56% x = 0.261 ±0.004 ±0.01 Radius from the center point

x = 0.277 ±0.004 ±0.01 Radius from the center point

White 29% x = 0.261 ±0.002 ±0.01 Radius from the center point

x = 0.277 ±0.002 ±0.01 Radius from the center point

[Adjustment method by bus] Cutoff RGB CUTOFF2 G CUTOFF2 = Fixed to 0.

Vary RB CUTOFF2.

Gain RGB-GAIN G-GAIN = Fixed to 0.

Vary RB-GAIN. (The adjustment value is measured with MINOLTA CA-210 and the correction mode is measured in the mode compatible with CH02 “TOPCON”.)

Adjustment range: ±30

5. MCL setting procedure

1. “MCL” is displayed in the upper left portion of the screen as shown in the figure below by sending the MCL key of the remote control for adjustment.

MCL

2. When the screen disappears after a few seconds and appears again, MCL setting is complete.

5 – 4

LC-32AX5H/M/X

6. Factory setting

6.1. Performing the factory setting using the remote control for adjustment

1. Perform the factory setting using the remote control for adjustment. (This setting must be done after performing the MCL data setting.)

2. “H” standing for factory setting 1, “M” standing for factory setting 2 or “X” standing for factory setting 3 is displayed in the upper left portion of the screen by continuing to press the Factory Setting key on the remote control for adjustment. (The figure below is the screen for factory setting 2.)

3. When “SETTING COMPLETE” is displayed in the middle of the screen after a few seconds, setting is complete.

SETTING COMPLETE

Model name Key name Remote control code Setting S-SYSTEM Set OSD language

LC-32AX5H Factory setting 1 (H) 100000111111110 I ENGLISH LC-32AX5M Factory setting 2 (M) 100000001010110 B/G ENGLISH LC-32AX5X Factory setting 3 (X) 100001001011110 B/G ENGLISH

4. Turn off the power.

NOTE: Set the Power switch to “OFF” immediately after completing the factory setting.

5 – 5

LC-32AX5H/M/X

[2] PUBLIC MODE SETTING PROCEDURE

1. How to start Public Mode

• There are the following two ways to get the public mode setup screen displayed.

1) Press the “INPUT” and “VOL (+)” keys on the set at once and turn on the power.

2) Get the password input screen displayed.

Procedure

• The input starts with the leftmost digit.

• Use the numeric keys [1] thru [9] and [10/0] keys on the remote controller. The other keys are not acceptable.

• With a numeric-key input, “–” will change to “ “. The input position will move one digit to the right.

• With all the 3 digits entered, the password will be verified.

3) The 3-digit password is now verified. The password [0] [2] [7] provides for the public mode screen. (This screen comes on with whatever adjustment process settings.) With any other passwords, the screen changes to the normal mode.

In the adjustment process mode, turn on “PUBLIC MODE”. Also press the “CH ( )” and “VOL (+)” keys on the set at once and turn on the power.

2. How to exit Public Mode

There are the following ways to quit the public mode setup screen.

• Turn off “PUBLIC MODE” in the adjustment process mode. ( ) ← This way alone is not for quitting the setup screen, but for quitting the mode itself.

• Turn off the power with the “POWER” key. ( )

• Select “ENTER”. ( )

• Move the cursor to “RESET” and press the “FLASHBACK” key. (Back to the normal mode screen) ( )

••• “PUBLIC MODE” stays on in the adjustment process mode.

••• The settings will be back to the factory ones.

3. Public Mode Setting Values

• With the factory settings made, the public mode settings get initialized. (The adjustment process remains intact.)

5 – 6

LC-32AX5H/M/X

4. Public Mode Menu

The guidance is not displayed onscreen. Setup procedure

• To move the cursor up and down, use the “cursor UP/DOWN” key (remote controller) and “CH ( )/( )” key (remote controller and set).

• To change the settings, use the “cursor RIGHT/LEFT” key (remote controller) and “VOL (+)/(–)” key (remote controller and set).

• To save new settings, keep the cursor at “Enter” and use the “cursor RIGHT/LEFT” key (remote controller) and “VOL (+)/(–)” key (remote controller and set).

Public mode Power on fixed Maximum volume Volume fixed Volume fixed level RC button Panel button Menu button On screen display Input mode start Input mode fixed 232C Powon RC path through Reset Enter

5. On Setting Items

1. POWER ON FIXED

[Variable ] [ 60] [Variable ] [ 20] [Respond ] [Respond ] [Respond ] [Yes ] [Normal ] [Variable ] [Disable ] [Off ]

Selection Variable/Fixed Default Variable Explanation When set to “Fixed”, the power cannot be turned off with the power key on the remote control or main unit, and the image

reception state is kept (it does not enter the standby state). The power can be turned off by shutting off power supply from AC.

Limit in setting • Power key on the main unit/remote control power supply key

• OFF timer/ON timer Exception None Remarks • Selection of “FIXED” assumes use of STB, etc.

• When set to “Variable”, if the main power switch is set to off, the power is turned off after a wait of 1 second.

(Push-push switch only)

• Display ON/OFF in the hotel menu is controlled by the adjustment process “HOTEL POWERFIX”.

• When the power button is operated, a caution is displayed (it times out in 5 seconds).

(For the caution, refer to the power on fixed message sheet.)

* The caution is not displayed when in the adjustment process, hotel menu, default setting, MCL operation and auto preset

(Ch search operation). The OSD display including the menu and this caution have priority over all others. When “OSD display” (described below) is set to “Variable”, this caution is displayed as a special case.

2. MAXIMUM VOLUME

Selection Adjustment from 1 to 60 (no loop) Default 60 Explanation Sound volume can not be adjusted higher than the preset value. Limit in setting • When the sound volume is set lower than 59, only figures are displayed and the sound volume bar is not displayed.

• The maximum sound volume for ON-timer (Wake up timer) is limited also to the preset value. Exception • In the item “VOLUME” of adjustment process, the sound volume can be set freely irrespective of this setting. Remarks • Setting is valid only for the speakers of the unit. (As for the headphone, the sound volume can be set up to 60 irrespective

of the limit.)

• In line output (sound volume variable), the sound volume can be adjusted from -60 to 0 irrespective of pre-adjusted value.

• When the sound volume is set higher than the MAX setting by the adjusting process or headphone, the sound volume con-

trol operation is prohibited for turn-up and the sound volume should be turned down to MAX in this state.

5 – 7

LC-32AX5H/M/X

3. VOLUME FIXED

Selection Selection between “Variable” and “Fixed” (loop provided) Default Variable Explanation Sound volume is fixed and made invariable. Limit in setting • The sound volume for the ON-timer (Wake up timer) is fixed also without display of menu. Besides, the setting is made

Exception • In the item “VOLUME” of adjustment process, the sound volume can be set freely irrespective of this setting. Remarks • In “Variable” setting, the sound volume had been conventionally set at 1 but this operation has been abolished (and follows

4. VOLUME FIXED LEVEL

Selection Adjustment from 1 to 60 (no loop) Default 20 Explanation The sound volume to be fixed by “Volume fixed” is determined. Limit in setting None Exception None Remarks Setting is valid only when “Volume fixed” is selected for “fixed”.

impossible. (Basically, the menu is not displayed.)

• The following keys become invalid:

1) Sound volume Up/Down (VOL +/-) [for both remote control and the unit]

2) Mute (MUTE)

the last memory).

• The sound volume for the ON-time is not set at 1 either and the sound volume set value of the ON-timer before executing

the hotel mode is held.

• Setting is valid only for the speakers of the unit. (As for the headphone, the sound volume can be set up to 60 irrespective

of the limit.)

• In line output (sound volume variable), the sound volume can be adjusted from -60 to 0 irrespective of pre-adjusted value.

• As for sound volume fixing and sound volume MAX level, the sound volume fixing has priority.

• Once the sound volume has been changed by adjustment process or headphone, it should be set back to the sound volume

preset by sound volume fixing level when the adjustment process ends or when the headphone is removed.

This must be confirmed actually by changing also the sound volume in accordance with setting.

5. R/C BUTTON

Selection Selection between “Respond”, “Limited” and “No respond” (loop provide) Default Respond Explanation Keys acceptable by remote control are limited or reception of keys can be prohibited. Limit in setting 1) In “limited” setting, only power ON/OFF, sound volume , tuning and BACKLIGHT (brightness sensor) are

accepted.

2) In “No respond” setting, all the keys (including the power key) are not accepted. Exception • Adjustment process, factory setting, inspection process and hotel only keys are valid irrespective of setting.

Remarks

6. PANEL BUTTON

Selection Selection between “Respond” and “No respond” (loop provide) Default Respond Explanation All the operations by keys (except the power key) of the unit can be invalidated. Limit in setting Exception • Inspection mode and hotel menu mode can be started irrespective of setting.

Remarks

7. MENU BUTTON

Selection Selection between “Respond” and “No respond” (loop provide) Default Respond Explanation In “No respond” setting, the menu operation by the menu key of the remote control and the menu key of the unit are invali-

Limit in setting • ON-timer (Wakeup Timer) is turned OFF.

Exception • Inspection mode and hotel menu mode can be started irrespective of setting.

Remarks

• All the keys can be used in adjustment process, inspection mode and hotel menu irrespective of setting.

dated.

• The following keys become invalid.

Wake-up timer and clock setting keys and all of the direct change keys to menu display

• All the keys can be used in adjustment process, inspection mode and hotel menu irrespective of setting.

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LC-32AX5H/M/X

8. ON SCREEN DISPLAY

Selection Selection between “Yes”, “Limited” (loop provide) Default Yes Explanation The following OSD displays are made ineffective.

Displays of menu group, channel call, sound volume bar and direct key call

Limit in setting • Set time of the OFF-timer (SLEEP TIMER) is cleared.

• Setting of the no-signal power-OFF (AUTO POWER OFF) is cleared to “OFF”.

• Setting of the no-operation power-OFF is cleared to “OFF”.

• Keys falling under any of the following items become invalid.

1) Appearance of screen changes and the sound changes.

2) Personal functions which are hard to restore. Ex.) Screen display, menu, OFF-timer, ON-timer, AV MODE, screen size switching, clock setting, treble emphasis, AUDIO

ONLY, sound changeover, LANGUAGE, CLOSED CAPTION

Others • Simple input switching is generated. Those which are restored soon after leaving as they are and may be requested for

change by customer are not prohibited. Ex.) Brightness sensor (BACKLIGHT) and PIC. FLIP

Exception • Such a caution which is displayed independently is displayed as it is.

9. INPUT MODE START

Selection Selection between “Normal”, “TV (CH~)” “INPUT1~5”, “PC” (loop provide) Default Normal Explanation In power-ON, the input source to be started or channel can be set.

About options • All the input sources in the model are made selectable.

Limit in setting • The display of channel setting menu and the channel setting operation are prohibited (except for MCL). Exception None Remarks • In setting at “Normal”, the setting of “Input mode fixed” is changed to “Variable” and selection should be prohibited.

10.INPUT MODE FIXED

Selection Selection between “Variable” and “Fixed” (loop provide) Default – (Variable) Explanation The input mode is fixed at the input source or the channel set at the “Input mode start” in 9 and other input sources and chan-

Limit in setting • With the execution of hotel mode, the input source is forced to change to that set by “Input mode start” and the channel

Exception None Remarks • In the following case, setting is cancelled and mode is changed to “Variable”.

11.232C POWON

Non-responding signal caution, TELE TEXT caution and power-ON fixing caution

(In standard mode, the operation follows the last memory.)

• When the input/output switchable input source is selected and the input source is set to output, the setting of input/output

switching is changed to input at the execution of hotel menu. In addition, the input/output switching by menu is prohibited.

• In TV mode, the display of all channels is stopped and it is treated as an input source. At this time, the channel to be set fol-

lows the last memory and the content of the last memory is included in the notation by options. Ex.) TV (CH2), TV (CH4) etc.

• The order of appearance of options in the hotel menu should agree with the order of toggles by input switching key.

nels can be made non-selectable.

switching and input switching are prohibited thereafter.

• The following keys are invalidated.

CH , direct tuning button, FLASHBACK, input *However, the keys (input switching and CH keys) of the unit for menu operation remain valid.

When the setting of “Input mode start” is set to “Standard (Normal)”

Selection “Enable” and “Disable” Default Disable Explanation When in the standby state, power ON by the RS-232C command is enabled or disabled. Limit in setting None Exception None Remarks It is irrelevant to power OFF by the RS-232C command.

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LC-32AX5H/M/X

12.RC PATH THROUGH

Selection “Off”, “On: TV RCE”, “On: TV RCD” Default Off Explanation Remote control signal output from the pin 9 of the RS-232C terminal and signal reception by is enabled or disabled.

When set to “ON: TV RCE”, TV also receives signals. With “ON: TV RCD”, the remote control signal is output from the pin 9,

but TV does not respond to the remote control. Limit in setting When set to “ON: TV RCD”, TV does not accept the remote control. Exception None Remarks

RS-232C power ON command “POWR1_ _ _ ”

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LC-32AX5H/M/X

LC-32AX5M

CHAPTER 6. TROUBLESHOOTING TABLE

Service Manual

[1] TROUBLESHOOTING TABLE

No power (front LED failure to light up) or no startup (front LED failure to turn from red to green)

Is the AC cord connector tightly connected to the set? NO Reconnect the AC cord tightly and turn on the power again.

YES Is the output voltage at pin (5) of P5011 (BU+5V line) as specified?

YES Are the wire harnesses and other cables properly connected in

the set?

YES Is there the PS ON and PNL_POW signal input at pin (1) and (4) of P5011 (PS ON line)?

YES Is the output voltage of each pin on P5010 as prescribed? Pin 1 6V

Pins 3 and 4 5V Pins 7 and 8 10V Pins 11 and 12 13V

NO Replace the power unit (RDENCA182WJQZ).

NO Reconnect the wire harnesses and other cables properly in the

set.

NO Check the PS ON signal line PNL_POW signal line.

NO Replace the power unit (RDENCA182WJQZ).

YES Are the DC/DC converter outputs and the output voltages along the control lines as specified?

1) 5V (IC707 etc.)

2) 4V (IC703, Q707 etc.)

3) 3.3V (IC702, Q706 etc.)

4) 1.5V (IC704, Q708 etc.)

5) 8.5V (IC705 etc.)

6) 31V (IC706 etc.)

NO Check the DC/DC converters and the control lines. Replace

defective parts as required.

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LC-32AX5H/M/X

With <Video> signal input No video onscreen (1)

No external input video onscreen <INPUT 1>

Is INPUT 1 selected on the input select menu screen? NO Select INPUT 1 on the input select menu screen to pick up the

right input signal.

YES Is there the video signal input at pin (1) of IC3408 (AV SWITCH)? NO Check the line between pin (8) of J3404 and pin (1) of IC3408.

YES Is there the video signal output at pin (7) of IC3408? NO Check IC3408 and its peripheral circuits.

YES Is there the video signal input at U2 pin of IC801? NO Check Q3404 and its peripheral circuits.

YES Are signals output from the pins P22, P23, R22, R23, T22, T23, U22, U23, V22, and V23 of IC801 normally?

NO Check IC801 and its peripheral circuits.

YES Check LVDS cable, LCD controller (incl. panel) and their peripheral circuits.

With <Video> signal input No video onscreen (2)

No external input video onscreen <INPUT 2>

Is INPUT 2 selected on the input select menu screen? NO Select INPUT 2 on the input select menu screen to pick up the

YES Is there the video signal input at pin (3) of IC3408 (AV SWITCH)? NO Check the line between pin (1) of J3405 and pin (3) of IC3408.

YES Is there the video signal output at pin (7) of IC3408? NO Check IC3408 and its peripheral circuits.

YES Is there the video signal input at U2 pin of IC801? NO Check Q3404 and its peripheral circuits.

right input signal.

YES Are signals output from the pins P22, P23, R22, R23, T22, T23, U22, U23, V22, and V23 of IC801 normally?

YES Check LVDS cable, LCD controller (incl. panel) and their periph-

eral circuits.

NO Check IC801 and its peripheral circuits.

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LC-32AX5H/M/X

With <Component> signal input No video onscreen (3)

No external input video onscreen <INPUT 1>

Is INPUT 1 selected on the input select menu screen? NO Select INPUT 1 on the input select menu screen to pick up the

right input signal.

YES Are there the Y, Pb and Pr signal inputs at pins (25), (1) and (5)

of IC3402 (Component SW), respectively?

YES Is input waveform of IC802 normal? Y=U1pin, Sync=J2pin Pb=L1pin, Pr=R1pin

YES Are there the signal outputs at pins U22, U23, V22, V23, P22, P23, R22, R23, T22, T23 of IC801, respectively?

YES Check LVDS cable, LCD controller (IN PANEL) and their periferal circuits.

NO Check the line between pins (10)/(6)/(4) of J3404 and pins (25)/

(1)/(5) of IC3402.

NO Check IC3402 and its peripheral circuits.

NO Check IC801 and its peripheral circuits.

With <Component> signal input No video onscreen (4)

No external input video onscreen <INPUT 3>

Is INPUT 3 selected on the input select menu screen? NO Select INPUT 3 on the input select menu screen to pick up the

YES Are there the signal inputs from the HDMI (SC403) connector to the following input terminals of IC8702 (pin (16), (17), (19), (20), (22), (23), (25), (26)).

YES Are there the clock, H, V, Data signal outputs at pins (71) - (78),

(83) - (90), (96), (98), (99), (104) - (111) of IC8702, respectively?

YES Are there the signal outputs at pins U22, U23, V22, V23, P22,

P23, R22, R23, T22, T23 of IC801, respectively?

YES Check LVDS cable, LCD controller (IN PANEL) and their peripheral circuits.

NO With an HDMI device connected, is IC404 (EEPROM) accessed

NO Check IC8702, IC8703 and their peripheral circuits.

NO Check IC801 and its peripheral circuits.

right input signal.

by I2C and is the DDC I2C CLOCK/DATA data read?

Check IC404 and their peripheral circuits.

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LC-32AX5H/M/X

No audio heard (1)

No sound in the UHF/VHF reception.

Is the IF output from the tuner pin (14) of TU3401 as specified? NO Check TU3401 and its peripheral circuits.

YES Is the SIF signal input at A21 pin of IC801 as specified? NO Check Q3414, Q3415 and their peripheral circuits.

YES Are audio signals from the pins B23 and D23 of IC801 as prescribed?

YES Is there the L-ch audio signal output at pins (53) of IC1301? NO Check IC1301 and its peripheral circuits. Is there the R-ch audio signal output at pins (54) of IC1301?

YES Is there the L-ch audio signal output at pins (20), (21) of IC1303 (AMP)? Is there the R-ch audio signal output at pins (40), (41) of IC1303 (AMP)?

NO Check IC801 and their peripheral circuits.

NO Check IC1303 and its peripheral circuits.

YES Are audio signals of L-ch and R-ch output from the pins (1)/(2) and (3)/(4) of P5007 normally?

YES Check the speakers and their peripheral circuits.

No audio heard (2)

No external audio heard <INPUT 1> Is there the L-ch audio signal input from pin (11) of input terminal J3404 to pin (56) of IC1301? Is there the R-ch audio signal input from pin (13) of input terminal

J3404 to pin (57) of IC1301? <INPUT 2> Is there the L-ch audio signal input from pin (4) of input terminal

J3405 to pin (50) of IC1301? Is there the R-ch audio signal input from pin (6) of input terminal J3405 to pin (51) of IC1301?

YES Is there the L-ch audio signal output at pins (20), (21) of IC1303 (AMP)? Is there the R-ch audio signal output at pins (40), (41) of IC1303 (AMP)?

NO Check IC1301 and its peripheral circuits.

NO Check IC1303 and its peripheral circuits.

YES Are audio signals of L-ch and R-ch output from the pins (1)/(2)

and (3)/(4) of P5007 normally?

YES Check the speakers and their peripheral circuits.

6 – 4

No audio heard (3)

No audio signal at the monitor audio output terminal.

Is there the L-ch audio signal output at pin (37) of IC1301? NO Check IC1301 and its peripheral circuits. Is there the R-ch audio signal output at pin (36) of IC1301?

YES Does the audio mute circuit function?

(Q3401, Q3402 and Q3403)

YES Check the monitor audio output terminal (J3405) and its peripheralcircuits.

No audio heard (4)

No sound heard from the headphone.

Is there the audio signal output at pins (28) (L-ch) and (27) (R-ch) of IC1301?

NO Check Q3401, Q3402, Q3403, pin (58) of IC2001 and their

peripheral circuits.

LC-32AX5H/M/X

Is there the L-ch audio signal output at pin (3) of IC1302 (H/P AMP)? Is there the R-ch audio signal output at pin (5) of IC1302 (H/P AMP)?

YES Check J101, IC1901, IC1902 and it peripheral circuits, as well as the headphone jack line.

NO Is the mute signal input at pin (2) of IC1302 as specified?

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LC-32AX5H/M/X

No audio heard (5)

No HDMI sound heard.(INPUT 3 is digital audio.)

Does the HDMI image appear onscreen? NO Refer to “<INPUT 3> in No external image onscreen (HDMI)”.

YES No audio output from INPUT 3. NO Check if the EDID data of IC404 (INPUT 3) is normal.

YES

YES Are waveforms of the pins (120) - (124) of IC8702 output

normally?

YES Are output waveforms of the audio output pins B23 and D23 of IC801 normal?

NO Check peripheral circuits of IC8702.

NO Check peripheral circuits of IC801.

Check peripheral circuits of IC404.

YES Are audio signals of L-ch and R-ch input in to the pins (53) and (54) for volume, equalizer and sound of IC1301 normally and

output from the pins (28) and (27) normally?

YES Are there the L-ch and R-ch audio signal outputs at pins (20), (21) and (40), (41) of IC1303 (AMP), respectively?

YES Are there the L-ch and R-ch audio signal inputs at pins (1), (2) and (3), (4) of P5007, respectively?

No audio heard (6)

No sound from the HDMI sound input terminal. (INPUT 3 analog audio)

YES Is there the L-ch audio signal input from pin (4) of external input terminal J3401 (HDMI AUDIO IN) to pin (47) of IC1301? Is there the R-ch audio signal input from pin (2) of external input terminal J3401 (HDMI AUDIO IN) to pin (48) of IC1301?

YES Are audio signals of L-ch and R-ch of IC1301 normally and out-

put from the pins (28) and (27) normally?

NO Check peripheral circuits of IC1301.

NO Check IC1303 and its peripheral circuits.

NO Check peripheral circuits of IC1301.

YES Are there the L-ch and R-ch audio signal outputs at pins (20), (21) and (40), (41) of IC1303 (AMP), respectively?

YES Are there the L-ch and R-ch audio signal inputs at pins (1), (2) and (3), (4) of P5007, respectively?

NO Check IC1303 and its peripheral circuits.

6 – 6

LC-32AX5M

CHAPTER 7. MAJOR IC INFORMATIONS

Service Manual

[1] MAJOR IC INFORMATIONS

1. IC801 (IXB880WJ)

Outline

DVP-M2S is a 1-chip video signal processing LSI for flat panel display supporting multi-format (NTSC/PAL/SECAM).

BLOCK DIAGRAM

LC-32AX5H/M/X

MCU

IC2001

AV SW

VHINJM2246M-1Y

COMPONENT SW VHISM5301CS-1Y

POWER

3.3V 1.5V

UART

V OUT

Y/Pb/Pr

27MHz Xtal

RH-IXB880WJZZQ

IC801

DVP-M2

S_IF

SIF AMP

OFL_PWM

LV_PCLK LV_R/G/B

I2S

MODULE

L/R

Volume/EQ/HP/ Surround

HDMI Receiver

MST3383

IC8702

LCD

Audio

7 – 1

LC-32AX5H/M/X

Terminal assignment (TOP VIEW)

7 – 2

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