Tuesday, October 20, 2015

HITACHI 32LD9700 - 37LD9700 SERVICE MODE AND TROUBLE SHOOTING

HITACHI 32LD9700 - 37LD9700 


SERVICE MODE AND TROUBLE SHOOTING 

Adjustment
How to get to Adjustment mode
Using the R-side control buttons with the set turned off (standby) can activate it.
Press the SUB-POWER button, INPUT SELECT button and DOWN button at the same time and hold for more than 5 seconds.
The set turns on in adjustment mode with OSD.
Changing data and Selecting Adjustment code
When the set is in adjustment mode, the cursor UP,DOWN ,LEFT ,RIGHT  and OK buttons of the remote control or R-side control buttons may be used as the adjustment keys.
UP,DOWN buttons are used for selecting adjustment code.
LEFT,RIGHT  buttons are used for changing data values.
OK button is used for confirming the data.
After finishing the necessary adjustment press MENU button. Adjustment mode is released and the set returns to normal condition.
Memory Initialize operation
NOTE: The execution of this function returns the adjustment codes to the preset values, therefore,
adjustment data will be lost.
Procedure
(1) Enter Adjustment Mode.
(2) Select MEMORY INIT adjustment code (No.898) and change the data value from 0 to 1.
(3) Activate MEMORY INIT by pressing OK button.
(4) Select No.712 and change data value from 1 to 0.
(5) Check that the receiving channel goes to P1. Unit is set to preset values.
How to check method of the use accumulation time for panel.
Select No. 894 of Service Adjustment Menu.
( *When No.894 is displayed as “65535” select No.893 and change data value from 0 to 1. Check No.894 is
displayed as “0”.)
Procedure to re-install new software of Digital module software
1. RS232C cable should be connected to RS232C terminal of TV set.
2. TV set turn ON.
3. Press hold [S.MODE], [YELLOW] and [Blue] button of remote controller until the service menu
appears.
4. Set data of No 888 from [0] to [1] then press [OK] button.
5. RS232C cable should be connected between TV set and PC.
6.
Program menu appears after double clicking Hyper
Terminal Icon.
Condition of Transfer
Bit rate:115200
Data bit:8
Parity: none
Stop bit:1
Flow: none
7. Click “Transfer” then select ”File send”.
8. Select required software file in the folder.
9. Turn Off the TV set.
10. Click “Send” in the “ File send” menu.
11. Turn On the TV set.
12. Screen will change and digit of Packet window will start from “0”.
13. Should wait until screen has “OK” information.
14. Disconnect RS232C cable.
15. Press hold [S.MODE], [YELLOW] and [Blue] button of remote controller until the service menu
appears
16. data of no.888 should be changed back from [1] to [0] then press [OK] button.
17. Turn Off the TV set.
After, confirmation of a soft version is necessary.
SERIAL(RS-232C) Connector pin specification
Pin
Signal name
1
NC
2
RXD0
3
TXD0
4
NC
5
GND
6
NC
7
NC
8
NC
9
NC
 Troubleshooting
How to get to Burn-in mode
This mode displays the test patterns of some single color raster in turn. These signals are from built-in
generator of panel. So it can be presumed that maybe the panel has some trouble when the screen of Burn-in mode is abnormal.
Using the R-side control buttons with the set turned off (standby) can activate this mode. Press the SUB-POWER  button, INPUT SELECT  button and VOLUME DOWN  button at the same time and hold for more than 5 seconds.
The set turns on with single color raster and the OSD of [BURN IN: ON]. To escape from this mode, press the SUB-POWER  button, INPUT SELECT  button and UP button at the same time and hold for more than 5 seconds. Burn-in mode will be released.
How to recover the remote and R-side control key function
If remote and R-side control key cannot operate after miss set special function by front keys, these functions can recover by below method.
Press the SUB-POWER  button, INPUT SELECT  button and DOWN button at the same time and hold for
 The set turns on the service menu mode.
Select No.721 and No.722 then each data set from [0] to [1].
Or
Press the SUB-POWER button and DOWN button at the same time and hold for more than 5 seconds.
How to check method of the use accumulation time for panel.
Select No.894 of Service Adjustment Menu.
How to reset the accumulation time after replacing LCD panel.
Select No.893 of Service Adjustment Menu change data from [0] to [1] press OK.