Read and perform these adjustments when repairing the circuits or replacing electrical parts or PCB assemblies.
Prepare the following measurement tools for electrical adjustments.
1. Pattern Generator
2. BASIC ADJUSTMENTS
Hitachi 42PD380TA TV Service Menu
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On-Screen Display Adjustment
Set the VOLUME to minimum.
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 on the screen as Use the Channel UP/DOWN button or Channel button (0-9) on the remote control to select the options
Press the MENU button on the remote control to end the adjustments.
To display the adjustment screen for AV mode, press the INPUT SELECT button on the remote control to set to the AV mode. Press the VOL.DOWN button on the set and the channel (9) on the remote control for more than 2 seconds.
CONTRAST CENT
Receive the monoscope pattern.(RF Input)
Activate the adjustment mode display of Fig. 1-1 and press the channel button (35) on the remote control to select "CONTRAST CENTER".
Check if the step No. CONT CENT is "132".
Receive a broadcast and check if the picture is normal.
Press the INPUT SELECT button on the remote control to set to the AV mode. Then perform the above adjustments 1~3.
Receive a broadcast and check if the picture is normal.
Press the INPUT SELECT button on the remote control to set to the COMPONENT mode. Then perform the above adjustments 1~3.
Receive a broadcast and check if the picture is normal.
Press the INPUT SELECT button on the remote control to set to the HDMI mode. Then perform the above adjustments 1~3.
Receive a broadcast and check if the picture is normal.
WHITE BALANCE
Place the set in Aging Test for more than 30 minutes.
Receive the gray scale pattern from the Pattern Generator.
Press the INPUT SELECT button on the remote control to set to the AV mode.
Using the remote control, set the brightness and contrast to normal position.
Activate the adjustment mode display of Fig. 1-1 and press the channel button (03) on the remote control to select “R DRIVE”.
Press the CH. UP/DOWN button on the remote control to select the “R CUTOFF”, “B.DRIVE” and “B CUTOFF”.
Adjust the VOL. UP/DOWN button on the remote control to whiten the R CUTOFF, B.DRIVE and B CUTOFF at each step tone sections equally.
Perform the above adjustments 5 and 6 until the white color is looked like a white.
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).
Universal Remote - Service Mode - TV Factory menu codes
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