HITACHI 32LD380TA
LCD DISPLAY
SERVICE MODE AND POWER SUPPLY BLOCK DIAGRAM
This unit is provided with the following SERVICE
MODES so you can repair, examine and adjust easily.
SERVICE MODE
SERVICE MODE
To enter to the SERVICE MODE function, press and
hold both buttons simultaneously on the main unit and on the remote
control for more than the standard time in the appropriate condition
control for more than the standard time in the appropriate condition
WHEN REPLACING EEPROM (MEMORY) IC
CONFIRMATION OF CHECK SUM, POWER ON
TOTAL HOURS AND MICON VERSION
Initial total of MEMORY IC, POWER ON total hours and MICON VERSION can be checked on the screen. Total hours are displayed in 16 system of notation.
WHEN REPLACING EEPROM (MEMORY) IC
NOTE:If you set a factory initialization, the total hours is reset to "0". Please refer to "CONFIRMATION OF INITIAL DATA" when SUM DATA is not corresponding.
Initial total of MEMORY IC, POWER ON total hours and MICON VERSION can be checked on the screen. Total hours are displayed in 16 system of notation.
WHEN REPLACING EEPROM (MEMORY) IC
NOTE:If you set a factory initialization, the total hours is reset to "0". Please refer to "CONFIRMATION OF INITIAL DATA" when SUM DATA is not corresponding.
1.Turn on the POWER, and set to the TV mode.
2.Set the VOLUME to minimum.
3.Press both VOL. DOWN button on the set and Channel button (8) on the remote control for more than 2 seconds.
4.After the confirmation of each check sum, turn off the power.
2.Set the VOLUME to minimum.
3.Press both VOL. DOWN button on the set and Channel button (8) on the remote control for more than 2 seconds.
4.After the confirmation of each check sum, turn off the power.
ADJUSTMENT PROCEDURE
Read and perform these adjustments when repairing the
circuits or replacing electrical parts or PCB assemblies.
CAUTION
Use an isolation transformer when performing any service on this chassis.
When removing a PCB or related component, after unfastening or changing a wire, be sure to put the wire back in its original position.
When you exchange IC and Transistor with a heat sink, apply silicon grease (YG6260M) on the contact section of the heat sink. Before applying new silicon grease, remove all the old silicon grease. (Old grease may cause damage to the IC and Transistor).
Prepare the following measurement tools for electrical adjustments.
1. Pattern Generator
Read and perform these adjustments when repairing the
circuits or replacing electrical parts or PCB assemblies.
CAUTION
Use an isolation transformer when performing any service on this chassis.
When removing a PCB or related component, after unfastening or changing a wire, be sure to put the wire back in its original position.
When you exchange IC and Transistor with a heat sink, apply silicon grease (YG6260M) on the contact section of the heat sink. Before applying new silicon grease, remove all the old silicon grease. (Old grease may cause damage to the IC and Transistor).
Prepare the following measurement tools for electrical adjustments.
1. Pattern Generator
BASIC ADJUSTMENTS
On-Screen Display Adjustment
1. Set the VOLUME to minimum.
2. Press the VOL. DOWN button on the set and the channel button (9) on the remote control for more than 2 seconds to display adjustment mode .
3. Use the Channel UP/DOWN button or Channel button (0-9) on the remote control.
4. Press the MENU button on the remote control to end the adjustments.
5.To display the adjustment screen for AV, HDMI and COMPONENT mode, press the INPUT SELECT button on the remote control to set to the AV, HDMI and COMPONENT mode. Press the VOL.DOWN button on the set and the channel (9) on the remote control for more than 2 seconds.
1. Set the VOLUME to minimum.
2. Press the VOL. DOWN button on the set and the channel button (9) on the remote control for more than 2 seconds to display adjustment mode .
3. Use the Channel UP/DOWN button or Channel button (0-9) on the remote control.
4. Press the MENU button on the remote control to end the adjustments.
5.To display the adjustment screen for AV, HDMI and COMPONENT mode, press the INPUT SELECT button on the remote control to set to the AV, HDMI and COMPONENT mode. Press the VOL.DOWN button on the set and the channel (9) on the remote control for more than 2 seconds.
CONTRAST
1. Receive the monoscope pattern.(RF Input) Activate the adjustment mode
display and
2. press the channel button (35) on the remote control to select "CONTRAST CENTER".
3. Check if the step No. CONTRAST CENTER is "147".
4.Receive a broadcast and check if the picture is normal.
5.Press the INPUT SELECT button on the remote control to set to the AV mode.
6.Activate the adjustment mode display and press the channel button (35) on the remote control to select "CONTRAST CENTER".
7.Check if the step No. CONTRAST CENTER is "147".
8.Receive a broadcast and check if the picture is normal.
9.Receive a Color Bar Pattern.
10.Press the INPUT SELECT button on the remote control to set to the COMPONENT mode.
11.Activate the adjustment mode display and press the channel button (35) on the remote control to select "CONTRAST CENTER".
12.Check if the step No. CONTRAST CENTER is "147".
13.Receive a broadcast and check if the picture is normal.
14.Playback the DVD disc. (480i input)
15.Press the INPUT SELECT button on the remote control to set to the HDMI mode.
16.Activate the adjustment mode display and press the channel button (35) on the remote control to select "CONTRAST CENTER".
17.Check if the step No. CONTRAST CENTER is "147". Receive a broadcast and check if the picture is normal.
2. press the channel button (35) on the remote control to select "CONTRAST CENTER".
3. Check if the step No. CONTRAST CENTER is "147".
4.Receive a broadcast and check if the picture is normal.
5.Press the INPUT SELECT button on the remote control to set to the AV mode.
6.Activate the adjustment mode display and press the channel button (35) on the remote control to select "CONTRAST CENTER".
7.Check if the step No. CONTRAST CENTER is "147".
8.Receive a broadcast and check if the picture is normal.
9.Receive a Color Bar Pattern.
10.Press the INPUT SELECT button on the remote control to set to the COMPONENT mode.
11.Activate the adjustment mode display and press the channel button (35) on the remote control to select "CONTRAST CENTER".
12.Check if the step No. CONTRAST CENTER is "147".
13.Receive a broadcast and check if the picture is normal.
14.Playback the DVD disc. (480i input)
15.Press the INPUT SELECT button on the remote control to set to the HDMI mode.
16.Activate the adjustment mode display and press the channel button (35) on the remote control to select "CONTRAST CENTER".
17.Check if the step No. CONTRAST CENTER is "147". Receive a broadcast and check if the picture is normal.
POWER SUPPLY BLOCK DIAGRAM
CLICK ON THE IMAGE TO ZOOM IN
