Sharp LC-26P70EE. LC-32P70EE, How to enter the service mode, service mode adjustment details

Sharp LC-26P70EE/F/I/K/RU, LC-32P70EE/F/I/K/RU, LC-37P70EE/F/I/K/RU - DVB-T, PAL B/G, I / SECAM B/G, D/K, L/L’SYSTEM COLOUR TELEVISIONs

The adjustment values are set to their optimum at the factory before shipping. If by any chance a value should become improper or a readjustment is required due to part replacement, make an adjustment according to the following procedure.

[Be very carefull in handling the information described here, lest the users should know how to enter the adjustment process mode. If the settings tampered within this mode, unrecoverable system damage may result, means the main digital board have to be replaced.  Will cost much]

Entering and exiting the adjustment process mode
1 Unplug the AC power cord of TV set to force power off.
2 While holding down the “VOL (–)” and “INPUT” keys on the set at once, plug in the AC power cord to turn on the set. The letter K appears on the screen. (Factory mode)
3 Next, hold down the “VOL (—)” and “P ( V )” keys on the set at once. Multiple lines of orange characters appearing on the screen indicate that the set is now in the adjustment process mode. If you fail to enter the adjustment process mode (the display is the same as normal start up), retry the procedure.
4 To exit the adjustment process mode after the adjustment is done, unplug the AC power cord to force off the power. (When the power is turned off by the remote controller, unplug also the AC power cord and wait for 10 seconds before plug it in again.)
5 To remove “K” mode, just repeat steps 1 and 2. This time the letter K disappears from screen.

Remote Controller Key Operation and Description of Display in Adjustment Process Mode and Description of display

[Input mode is switched automatically when relevant adjustment is started so far as the necessary input signal available]

Adjustment process mode menu

The character string in brackets [ ] will appear as a page title in the adjustment process menu header.

White Balance Adjustment

Condition of the inspection: • Backlight: MAX (+8) [DYNAMIC]

Colorimeter at screen centre

Adjustment reference device: Minolta CA-210

Tolerance adjustment spec. ±0.004, Inspection spec. : ±0.006 (GAMMA 1)

Tolerance adjustment spec. ±0.002, Inspection spec. : ±0.004 (GAMMA 2...6)

1. Display the current adjustment status at point 6. 

The pattern for checking the adjustment status is toggled by pressing the “6” button on the remote control. (Normal)

OSD display -> “6” -> pattern for check (OSD disappears) -> “6” -> normal OSD display -> …)

2 Read the value of the luminance meter.

3 Change M GAMMA R6/M GAMMA B6 (adjustment offset value) on page 9/11 of process adjustment so that the values of the luminance meter approach x = 0.272 and y = 0.277.  (Basically, G is not changed. If adjustment fails only with R and B, then G should be reduced. In this case, the weaker of R and B must be fixed.)

4 If G is changed in step “3”, change the values of M GAMMA G1 - M GAMMA G5.

Process adjustment as follows. When not changed, go to step “5”.
Offset value of M GAMMA G1 = (Offset value of M GAMMA G6)*(160/960)
Offset value of M GAMMA G2 = (Offset value of M GAMMA G6)*(320/960)
Offset value of M GAMMA G3 = (Offset value of M GAMMA G6)*(480/960)
Offset value of M GAMMA G4 = (Offset value of M GAMMA G6)*(640/960)
Offset value of M GAMMA G5 = (Offset value of M GAMMA G6)*(800/960)

5 Display the adjustment status of the current point 5. (Each time the “5” button on the remote control is pressed, the adjustment status check pattern is toggled.)  (Normal OSD display -> “5” -> Pattern display (OSD disappears) -> “5” -> Normal OSD display ->…)
Change M GAMMA R5/M GAMMA B5 (adjustment offset value)  of process adjustment so that the values of the luminance meter approach x = 0.272 and y = 0.277.
6 Repeat step “5” for GAMMA points 4, 3, 2, and 1.

Adjustment: Check that the values on page 7/11 of process adjustment are set as below. If not, change them accordingly.

QS Temperature NVM Data Confirmation

During servicing of the LCD TV set , by software upgrading or by any cleaning NVM, it’s mandatory select the “Inch  Setting” according to the size of the TV set.

Lamp error detection

Functional description
This LCD colour television has a function (lamp error detection) to be turned OFF automatically for safety when the lamp or lamp circuit is abnormal.  If the lamp or lamp circuit is abnormal, or some other errors happen, and the lamp error detection is executed, the following occur.
1 The main unit of television is turned OFF 5 seconds after it is turned ON. (The power LED on the front side of TV turns from green to red.)
2- If the situation “1” happens 5 times sequentially, television can not be turned ON. (The power LED remains red.)
Countermeasures
When television is turned OFF by the lamp error detection mentioned above, it enters the adjustment process with the power LED red. Entering the adjustment process turns OFF the error detection and turns ON TV. This enables the operation check to detect errors in the lamp or lamp circuit.  Check whether “L ERROR RESET” on point 7, page 10/11 of the adjustment process is 1 or more. If it is 1 or more, it indicates the lamp error detection was executed. After confirming that the lamp or lamp circuit is normal, reset the lamp error counter pushing “OK” in the R/C. After resetting counter the label “***OK***” appears on Screen.
Reset standby cause error list
After confirming that the lamp error counter has been erased, select “STAND BY CAUSE RESET”  of the adjustment process and select ON using the right cursor. For execute press “OK” in the R/C and the label “***OK***” appears on Screen.

Public Mode (Hotel Mode)
How to Enter in the Public Mode (Hotel Mode).
Turn on the power in analog TV mode and enter in the Adjustment Process mode (ADJ1 or Service Mode) as usual.
Turn off TV by pressing Main Power switch.
While pressing “VOL+”and “P^” keys at the same time, press Main Power switch for more than 2 seconds.
After this sequence the TV will turn on showing the Public Mode setting.