Saturday, November 28, 2015

SONY KV-25FX20A- KV-29FX20A - KV-29FX201E SERVICE LED BLINKING CODE MODE AND CIRCUIT DIAGRAM

SONY KV-25FX20A- KV-29FX20A - KV-29FX201

SERVICE LED BLINKING CODE MODE AND CIRCUIT DIAGRAM  

SELF DIAGNOSTIC SOFTWARE
The identification of errors within the FE-1A chassis is triggered in one of two ways :- 1: Busy or 2: Device failure to respond to IIC. In the event of one of these situations arising the software will first try to release the bus if busy (Failure to do so will report with continuous flashing LED) and then communicate with each device in turn to establish if a device is faulty. If a device is found to be faulty the relevant device number will be displayed through the LED (Series of flashes which must be counted)., non fatal errors are reported using this method. Each time the software detects an error it is stored within the NVM.
LED BLINKING CODE 
LED ERROR COUNT
ERROR
00
No error
01
Not allowed (may be confused with Sircs response flash!)
02
Protection circuit trip < ANY TIME >
03
Reserved
04
No vertical sync
05
AKB
06
IIC bus clock and/or data lines low at Power ON
07
NVM no IIC bus acknowledge at Power ON
08
Jungle controller no IIC acknowledge at Power ON
09
Tuner no acknowledge at Power ON
10
Sound processor no acknowledge at Power ON

1. Turn on the main power switch of the TV set and enter into the ‘Standby Mode’.
2. Press the following sequence of buttons on the Remote Commander.
(ON SCREEN  DISPLAY) > (DIGIT 5)>  (VOLUME -) >  (TV)
ADJUSTMENTS
BEAM LANDING
1. Input an all white signal from the pattern generator. Set the Contrast and Brightness to normal.
2. Set the pattern generator raster signal to Red.
3. Move the deflection yoke forward and adjust with the purity control so that the Red is at the centre and the Blue and Green take up equally sized areas on each side of the screen.
See Fig.
4. Move the deflection yoke forward and adjust so that the entire screen becomes Red. See Fig
5. Switch the raster signal to Blue, then to Green and verify the condition.
6. When the position of the deflection yoke has been determined, fasten the deflection yoke with the screws.
7. If the beam does not land correctly in all the corners, use a magnet to correct it. [See Fig


CONVERGENCE
Preparation:
• Before starting this adjustment, adjust the focus, horizontal size and vertical size.
• Minimize the Brightness setting.
• Input a dot pattern from the pattern generator.
Horizontal and vertical static convergence
1. [Moving horizontally], adjust the H.STAT control so that the Red, Green and Blue points are on top of each other at the centre of the screen.
2. [Moving vertically], adjust the V.STAT magnet so that the Red, Green and Blue points are on top of each other at the centre of the screen.
3. If the H.STAT variable resistor is unable to bring the Red, Green and Blue points together at the centre of the screen, adjust the horizontal convergence with the H.STAT variable resistor and the V.STAT magnet in the manner indicated below. [In this case, the H.STAT variable resistor and the V.STAT magnet influence each other].
Tilt the V.STAT magnet and adjust the static convergence by opening or closing the V.STAT magnet.
4. If the V.STAT magnet is moved in the direction of the a and b arrows, the Red, Green and Blue points move as indicated below.

FOCUS
1. Receive a television broadcast signal.
2. Normalise the picture setting.
3. Adjust the focus control on the flyback transformer for the best focus at the centre of the screen.
Bring only the centre area of the screen into focus, the magenta ring appears on the screen. In this case, adjust the focus to optimize the screen uniformly.
WHITE BALANCE
G2 Screen Adjustment
1. Switch the TV set into AV mode [apply a cross-hatch signal].
2. Enter into the ‘Service mode’ and select ‘Picture Control’.
3. Enter ‘Picture Control’ and select ‘Personal’ press OK.
4. Return to ‘Picture Control’ menu and select ‘Reset’.
5. Measure the voltages on the 3 cathodes of the CRT, Kr,Kg and Kb using an oscilloscope with a 100:1 probe.
6. Connect the oscilloscope to the CRT cathode which recorded the highest voltage and adjust [RV702 SCREEN] located on the C Board to obtain a reading of 175V.
White Balance Adjustment
1. Input an all white signal from the pattern generator.
2. Enter into the Service Mode.
3. Enter into the ‘Picture Adjustment’ service menu.
4. Select ‘Sub contrast’ and adjust to 7.
5. Select the ‘Green drive’ and adjust so that the white balance becomes optimum.
6. Select the ‘Blue drive’ and adjust so that the white balance becomes optimum.
7. Press the ‘TV’ button on the remote commander to return to TV operation.
ELECTRICAL ADJUSTMENTS
Service adjustments to this model can be performed
using the supplied Remote Commander RM-887.
HOW TO ENTER INTO SERVICE MODE
1. Turn on the main power switch and enter into the stand-by mode.
2. Press the following sequence of buttons on the Remote Commander
(ON SCREEN  DISPLAY) > (DIGIT 5) > (VOLUME +) > (TV)
‘TT--’ will appear in the upper right corner of the screen.
Other status information will also be displayed.
Move to the corresponding adjustment item using the ‘Green’ [up] or ‘Blue’ [down] buttons on the Remote Commander.
Press the ‘Yellow’ button to enter into the required menu item.
Press the ‘Menu’ button on the Remote Commander to quit the
Service Mode when all adjustments have been completed.
SUB BRIGHTNESS ADJUSTMENT
1. Input a Phillips colour pattern.
2. Press ‘TEST’ ‘TEST’ 13 on the Remote Commander.
3. Adjust the ‘Sub-Brightness’ data so that there is barely a difference between the 0 IRE and 10 IRE signal levels.
SUB COLOUR ADJUSTMENT
1. Receive a PAL colour bar signal.
2. Connect an oscilloscope to Pin 3 of CN504 [A Board].
3. Enter into the ‘Picture’ service menu.
4. Adjust the ‘Sub Colour’ data so that the Cyan, Magenta and
Blue colour bars are of equal levels as indicated below.
Note: Ensure that no signal is applied to the Antenna socket while carrying out the following IF adjustments.
SYSTEM B/G, D/K, I & L I.F ADJUSTMENT
1. Input a 38.9Mhz carrier signal at 100dBuV to Pin 11 [IF output] of the tuner [TU101].
2. Measure the voltage at Pin 17 of [IC101].
3. Adjust L103 [A Board] to obtain a voltage of 1.4V +/- 0.3V.
SYSTEM L BAND 1 I.F ADJUSTMENT
1. Input a 33.9MHz carrier signal at 100dBuV to Pin 11 [IF output] of the tuner [TU101].
2. Select ‘system L’ + C00 [channel 00].
3. Measure the voltage at Pin 17 [IC101].
4. Adjust RV101 [A Board] to obtain a voltage of 1.4V +/- 0.3V.
CIRCUIT DIGRAM
CLICK ON THE IMAGE TO ZOOM IN