Saturday, January 02, 2016

HITACHI L37X01 Service mode - Software update and adjustments - Hitachi-JA08536-Main-Board-for-L37X01U - Television repair

Category: LCD Television Repair  

Contents of this article 

  • Service modes
  • Diagnostics function 
  • Software update 
  • Mother board details  

 HITACHI L37X01

Adjustment
Adjustment mode

Using the remote controller with the set turned on can activate adjustment mode. Press the Programme Select button "1","GREEN"and "YELLOW" colour button at the same time and hold for more than 3 seconds The set displays the adjustment mode.
Self-Diagnosis Function
Digital module part self-diagnosis function
When the main microcomputer starts, check hardware (mainly LSI) using the self diagnosis program.
To enter to this Self-Diagnosis mode, follow the following steps:
Procedure:
1) Enter Adjustment Mode.
2) Select SELF TEST and press OK button.
3) SELF TEST screen is displayed.
4) Each code is displayed to a SELF TEST screen.
The diagnosis result is displayed with a numerical value to the right side of each code. Numerical value of 0 indicates normal, other values indicate errors.
Upgrading software using SD
The procedure is as follows.

Insert the MMC/SD card on which firmware was written into the SD slot of the TV. When obtained via email and a FTP server, a PC and a commercial SD reader/writer are necessary.
1. Select [menu] with a wireless remote controller.
2. Select [Initial Setup].
3. The Main software version will be displayed as Vxxx.xxxx
4. Select [Upgrade (SD)].
5. Select [Continue].
6. The upgrading process will continue until the bar is filled.
While upgrading, do not turn off the power.
7. After completion, the TV turns off automatically.
8. Upgrade finished. Confirm the new software version.
Abnormal Finish Message
When a CARD is not inserted or accessed:
Message
: Please insert SD card before upgrading.”
When the version written on the SD card is the same as a present version or older:
Message:”New software not found.”
When the SD card was removed during the upgrade process or data was not read from the SD card:
Message
:”Upgrading failed.”
RGB Amplitude Adjustment (AV Component Input)
1. Receive composite video adjustment signal at AV1 terminal input. Characters must not be inserted to both patterns of Black and White.
2.Go to Service Adjustment Menu and select “RGB”.
3.Press [>] for over 2 seconds then RGB Amplitude Adjustment starts automatically. OSD disappears while the adjustment is operating. OSD appears again when the adjustment is complete.
Component 480p/480i Adjustment
1.Next, receive 480p adjustment signal at AV4 terminal input. Characters must not be inserted to both patterns of Black and White.
2.Go to Service Adjustment Menu and select “RGB”.
3.Press [>] for over 2 seconds then RGB Amplitude Adjustment starts automatically. OSD disappears while the adjustment is operating. OSD appears again when the adjustment is complete.
2.Change signal formal from 480p to 480i.
5. Press [>] for over 2 seconds again, then RGB Amplitude Adjustment starts automatically. OSD disappears while the adjustment is operating. OSD appears again when the adjustment is complete.
Troubleshooting
Burn-in mode

This mode displays single colour raster test patterns in turn. These signals are from the built-in generator of the panel. So it can be presumed that the panel has a problem when the Burn-in mode screen is abnormal.
To activeate burn-in mode, use the remote control with the set turned on.
Press the “MENU”, “recall”, “9”, “OK” in turn for less than 2 seconds.
The set turns on with a single colour raster and [BURN IN: ON] displayed in the OSD. To escape from this mode, press the “MENU”, “recall”, “9”, “OK” in turn for less than 2 seconds.

Hitachi-JA08536-Main-Board-for-L37X01U
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