Sharp 30 inch Advanced Super View and Black TFT LCD TV - LC-30HV4U LC-30HV4D ADJUSTMENT PROCEDURES (AVC SYSTEM)
Sharp LCD TV LC30HV4U - Service adjustments and troubleshooting
Preparation for adjustment
1. The product has been adjusted and optimized in the factory. If the product needs to be readjusted for some reason, e.g., after parts replacement, follow the instructions shown below.
2. Control parameter values set in the in-process adjustment mode has been stored in the corresponding registers. When the product is readjusted, the contents of the registers are changed. Before readjustment, factory settings should be noted in case the contents of registers require to be restored.
3. Use a stabilized AC power supply.
4. To rewrite a program, you should note the items ("OSD MENU" and "Adjustment Values") you want to change and initialize EEPROM, and then rewrite the changes into EEPROM.
How to enter the in-process adjustment mode
1. The product has been adjusted and optimized in the factory. If the product needs to be readjusted for some reason, e.g., after parts replacement, follow the instructions shown below.
2. Control parameter values set in the in-process adjustment mode has been stored in the corresponding registers. When the product is readjusted, the contents of the registers are changed. Before readjustment, factory settings should be noted in case the contents of registers require to be restored.
3. Use a stabilized AC power supply.
4. To rewrite a program, you should note the items ("OSD MENU" and "Adjustment Values") you want to change and initialize EEPROM, and then rewrite the changes into EEPROM.
How to enter the in-process adjustment mode
Exercise great care to hide the procedure in
entering the in-process adjustment mode from the customer. Inadvertent setting
changes in this mode may cause a fatal error resulting in a program being
unrecoverable.
Entering the in-process adjustment mode:
1. Connect the system cable between the display and AVC system.
Turn off the "MAIN POWER" button of the display once.
Turn on the main power while holding down the "INPUT" button and the "VOL (-)" button of the Display simultaneously.
The system will be activated.
If you see multiple lines of blue characters on the display, you are in the in-process adjustment mode. If not (the normal activation screen opens), retry.
2. Accessing the inspection process mode:
After activation of the system, make adjustments according to the instructions indicated on the process adjustment OSD menu screen.
Move to the General Process Adjustment (AVC System Section Process).
3. Restoring factory settings: (At the time of "INDUSTRY INIT" execution, please wait for about 30 seconds until /// disappears.)
Turn off the "MAIN POWER" button of the display once.
Turn on the main power while holding down the "INPUT" button and the "VOL (-)" button of the Display simultaneously.
The system will be activated.
If you see multiple lines of blue characters on the display, you are in the in-process adjustment mode. If not (the normal activation screen opens), retry.
2. Accessing the inspection process mode:
After activation of the system, make adjustments according to the instructions indicated on the process adjustment OSD menu screen.
Move to the General Process Adjustment (AVC System Section Process).
3. Restoring factory settings: (At the time of "INDUSTRY INIT" execution, please wait for about 30 seconds until /// disappears.)
When the "INDUSTRY INIT" button is
selected after activation of the system, factory channel setting remains
unchanged.
After the system exits from the in-process adjustment mode.
Changes made by the user will default to factory settings. Note that channel setting is also initialized.
4. Exiting from the in-process adjustment mode:
Unplug the power cable while the system is in the in-process adjustment mode to exit from the mode.
Take care not to press the "POWER" button on the remote controller or the AVC system after using factory settings to run the system.
5. OSD menu screen and menu items during manual adjustment:
The layout and menu items of the OSD menu screen may somewhat vary depending on the program versions.
Just rewriting a program does not cause settings to be "initial values". (Preparation for adjustment).
After the system exits from the in-process adjustment mode.
Changes made by the user will default to factory settings. Note that channel setting is also initialized.
4. Exiting from the in-process adjustment mode:
Unplug the power cable while the system is in the in-process adjustment mode to exit from the mode.
Take care not to press the "POWER" button on the remote controller or the AVC system after using factory settings to run the system.
5. OSD menu screen and menu items during manual adjustment:
The layout and menu items of the OSD menu screen may somewhat vary depending on the program versions.
Just rewriting a program does not cause settings to be "initial values". (Preparation for adjustment).
Button operation in the in-process adjustment mode
Cursor Up Move to the next page
Cursor Down Back to the previous page
Volume (+) Increase the setting by 1
Volume (-) Decrease the setting by 1
SET/ENTER Execute the function
Cursor Left Increase the setting by 10
Cursor Right Decrease the setting by 10
Channel (Up) Move the cursor up
Channel (Down) Move the cursor down
INPUT Change input (Tuner -> Input 1 -> Input 2 ->Input 3 -> Input 4 -> PC ->)
Cursor Up Move to the next page
Cursor Down Back to the previous page
Volume (+) Increase the setting by 1
Volume (-) Decrease the setting by 1
SET/ENTER Execute the function
Cursor Left Increase the setting by 10
Cursor Right Decrease the setting by 10
Channel (Up) Move the cursor up
Channel (Down) Move the cursor down
INPUT Change input (Tuner -> Input 1 -> Input 2 ->Input 3 -> Input 4 -> PC ->)
In-process adjustment screen layout
6. Loading the backup data and setting HDCP when the PC I/F unit is replaced
Nearly
all data including factory settings, user settings, and channel setting
is stored in the PC I/F unit. The product comes with EEPROM (IC1506)
on the Main Unit in case the PC I/F unit is replaced; original data
backed up on the EEPROM can be loaded to the new PC I/F unit.
How to load the backup data
Select EEPROM RECOVER in the OSD menu (page 7/15) and turn the "Volume" key ON; then press "SET/ ENTER".
How to set HDCP
After
completion of adjustments, select KEY WRITE "ON" in the OSD menu (page
1/15) for manual adjustment and turn the "Volume" key ON; then press
"SET/ENTER".
TROUBLE SHOOTING Table
Sharp LC 30-HV4U - Sharp LC-30HV4D - LCD TV - Function details of ICs used - NTSC US model
IC2501 (MSP4448G)
IC for decoding audio signals.It serves as an S-IF audio signal decoder and an audio data selector.
IC for controlling audio delay.
LC-30/37HV4U uses a frame buffer to process video signals. This results in a delay in outputting video signals.
The IC delays output of audio signals to synchronize output of video and audio signals.
IC1301 (CXA2069Q)
7-input, 3-output selector.
This IC selects all audio and video signals received from input terminals and the tuner, except those signals
that relates to PC and components.
Video signals delivered to the IC are sent to Y/C separation circuits IC7001 (main) and IC402 (sub). Audio
signals are sent to the SR board via IC2501 (sound processor).
IC1401 (MM1519XQ)
4-input, 3-output video selector for component input.
This IC receives AV1/3 sub component input signals, AV3 DV1 RGB input signals and C.C. (closed caption)
signals. Its output is for main, sub, component and C.C.
LC-30/37HV4U uses a frame buffer to process video signals. This results in a delay in outputting video signals.
The IC delays output of audio signals to synchronize output of video and audio signals.
IC1301 (CXA2069Q)
7-input, 3-output selector.
This IC selects all audio and video signals received from input terminals and the tuner, except those signals
that relates to PC and components.
Video signals delivered to the IC are sent to Y/C separation circuits IC7001 (main) and IC402 (sub). Audio
signals are sent to the SR board via IC2501 (sound processor).
IC1401 (MM1519XQ)
4-input, 3-output video selector for component input.
This IC receives AV1/3 sub component input signals, AV3 DV1 RGB input signals and C.C. (closed caption)
signals. Its output is for main, sub, component and C.C.
IC1650 (Sil907)
Analog output TMDS receiver incorporating HDCP key.
This IC converts digital DVI-D signals into analog signals and supplies the analog RGB signals to IC1401.
DVI1.0 compliant
480P, 720P, 1080I supported
10-bit DAC output
Incorporated HDCP key
IC1602 (Z86129S)
C.C. (Closed Caption) decoder.
This
IC process the Vertical Blanking Interval (VBl) data from the image
signal field in the data that matches the transmission format defined
per EIA-608.
IC1601/1603 (Z86230S)
V-CHIP decoder.
This IC processes the extended data service (XDS) data in field 2 of Vertical Blanking Internal (VBl).
The XDS data is processed to define program blocking signals (PB) or restored XDS data packets.
The on-chip XDS filter in this IC allows only the XDS data packets to be restored and programmed.
The IC supports violence blocking and other XDS data service monitors (picture-in-picture).
IC7001 (µPD64084)
This
IC provides 3D processing of NTSC signals and thus high resolution Y/C
separation of the main image signals received from IC1301.
It incorporates a 4M-bit frame delay memory board and features one-chip 3D Y/C separation.
Two operation modes available; dynamic image 3D Y/C separation mode and 2D Y/C separation + YCNR mode
Y coring circuit, vertical contour compensation circuit, peaking filter and noise detection circuit incorporated
Power down mode available to minimize power consumption when not in operation.
IC402 (TC90A69)
Adaptive infield 3-line digital comb filter supporting both NTSC and PAL.
This IC is a high-precision Y/C 1 chip incorporating a CNR circuit and performs YC separation of the sub video signals received from IC1301.
IC7003/IC404 (ML6428C1)
6.7 MHz low-pass filter.
IC801/802 (TB1274AF)
IC for synchronous processing, luminance processing and chroma demodulation for color TV.
It receives main and sub luminance and chrominance signals from IC7001 (main) and IC402 (sub) and delivers component signals.
IC803 (CXA2101Q)
IC having a component input integrated with a high-performance image compensation circuit. Equipped with circuits for processing baseband signals and RGB signals and a 4-channel video switch incorporating an H/V synchronization signal processing circuit.
Input selection is done by INPUT-SEL (IIC BUS). YCbCr, Y, PbPr, GBR and their H/V synchronization signals are inputted to input pins of each channel.
Multi-scan facility permits acceptance of a horizontal scan line frequency range of 15 kHz to 60 kHz
This IC is a high-precision Y/C 1 chip incorporating a CNR circuit and performs YC separation of the sub video signals received from IC1301.
IC7003/IC404 (ML6428C1)
6.7 MHz low-pass filter.
IC801/802 (TB1274AF)
IC for synchronous processing, luminance processing and chroma demodulation for color TV.
It receives main and sub luminance and chrominance signals from IC7001 (main) and IC402 (sub) and delivers component signals.
IC803 (CXA2101Q)
IC having a component input integrated with a high-performance image compensation circuit. Equipped with circuits for processing baseband signals and RGB signals and a 4-channel video switch incorporating an H/V synchronization signal processing circuit.
Input selection is done by INPUT-SEL (IIC BUS). YCbCr, Y, PbPr, GBR and their H/V synchronization signals are inputted to input pins of each channel.
Multi-scan facility permits acceptance of a horizontal scan line frequency range of 15 kHz to 60 kHz
IC1901 (IXA392WJ)
FPGA for synchronous processing.
This IC selects synchronization signals and creates horizontal blanking signals.
IC604 (TA1318AF)
IC for synchronous processing of TV component signals and measurement of frequency.
This IC incorporates an input signal frequency measurement feature and synchronous regeneration features.
It supports synchronous horizontal regeneration (15.75 kHz, 31.5 kHz, 33.75 kHz and 45 kHz) and synchronous vertical regeneration (480I, 480P, 576I, 720P, 1080I, PAL 100 Hz, and NTSC 120 Hz)
FPGA for synchronous processing.
This IC selects synchronization signals and creates horizontal blanking signals.
IC604 (TA1318AF)
IC for synchronous processing of TV component signals and measurement of frequency.
This IC incorporates an input signal frequency measurement feature and synchronous regeneration features.
It supports synchronous horizontal regeneration (15.75 kHz, 31.5 kHz, 33.75 kHz and 45 kHz) and synchronous vertical regeneration (480I, 480P, 576I, 720P, 1080I, PAL 100 Hz, and NTSC 120 Hz)
PC I/F unit
IC10004 (CXA3506R)
3-ch, 8-bit 120MSPS A/D converter incorporating AMP and PLL.
This IC process video signals supplied to the interface board. On the main side, video signals (analog RGB) from CN6 are inputted to IN1 of IC10004. On the PC side, video signals (analog RGB) from CN8 are inputted to IN2 of IC10004.
Converted digital signals are sent to IC10025.
IC10310 (TLC5733A)
3-ch, 8-bit 20MSPS A/D converter.
This IC processes video signals supplied to the interface board. It receives analog signals (YCbCr) from CN6 and sends converted digital signals to IC10310.
The incoming video signal is converted to digital one and fed to IC10025.
IC10025 (IXA091WJ)IC10004 (CXA3506R)
3-ch, 8-bit 120MSPS A/D converter incorporating AMP and PLL.
This IC process video signals supplied to the interface board. On the main side, video signals (analog RGB) from CN6 are inputted to IN1 of IC10004. On the PC side, video signals (analog RGB) from CN8 are inputted to IN2 of IC10004.
Converted digital signals are sent to IC10025.
IC10310 (TLC5733A)
3-ch, 8-bit 20MSPS A/D converter.
This IC processes video signals supplied to the interface board. It receives analog signals (YCbCr) from CN6 and sends converted digital signals to IC10310.
The incoming video signal is converted to digital one and fed to IC10025.
IC for I/P conversion and scaling of digital image according to the output resolution, and for data conversion.
There are two input channels: V0 and V1. V1 is for sub 480i input processing for two-screen application. V0 is for processing all signals for main used for one and two-screen applications.
The IC generates clamp signals based on input synchronization signals.
It also performs data matrix conversion.
It creates OSD signals.
The incoming video signal is fed to IC10413.
IC10413 (SII170)
Panel link transmitter.
This IC converts 8-bit RGB image data received from IC10025 into TMDS differential signals and sends the resulting digital signals to the monitor.
HDCP function is provided.
(Note: When replace this IC, PWB replacement correspondence.)
One-chip RISC microprocessor.
This IC communicates with the monitor and controls the system operation.
It controls all the ICs located in the AVC system. IC10405 (µPD4721G) RS-232C line driver/receiver conforming to EIA/TIA-232-E. This IC enables the system to be controlled from a PC connected to the system. It also allows IC10001 to be upgraded using the PC.
