Sony KV-29LS30E Service Manual ▷ View online
17
+
YCH VR
Deflection Yoke
+
+
Tilt Direction
If you are unable to adjust the corner convergence properly,
this can be corrected with the use of permalloy magnets.
this can be corrected with the use of permalloy magnets.
HTIL correction can be performed by adding a TLH correction
assembly to the Deflection yoke.
assembly to the Deflection yoke.
HTIL Adjustment
YCH Adjustment
TLV Adjustment
Geometry Adjustment.
Preparation:
Before starting this adjustment, adjust the horizontal and
vertical static convergence.
vertical static convergence.
1.
Remove the deflection yoke spacer.
2.
Tilt the deflection yoke as indicated in the figure below and
optimise the geometry.
Tilting the DY Up and Down will balance the upper and
lower pin adjustment.
Tilting the DY Left and Right will balance the H-Trap
adjustment.
optimise the geometry.
Tilting the DY Up and Down will balance the upper and
lower pin adjustment.
Tilting the DY Left and Right will balance the H-Trap
adjustment.
3.
Re-install the deflection yoke spacer.
Screen Corner Convergence
TLH pieces
Deflection Yoke
a
b
d
Permalloy Assy
X-4387-214-1
X-4387-214-1
c
Install the permalloy assembly
for the area that needs correcting.
for the area that needs correcting.
Convergence adjustment with permalloy
+
TLV VR
Deflection Yoke
+
+
a-d: screen-corner
convergence defect
convergence defect
a
b
c
d
18
1.
Receive a television broadcast signal.
2.
Normalize the picture setting.
3.
Adjust the focus control located on the flyback transformer
to obtain 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
to obtain 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.
3-4. Screen (G2), White Balance
[Adjustment in the service mode using the remote
commander]
commander]
G2 adjustment
1.
Input a dot signal from the pattern generator.
2.
Enter the ‘Service Mode’ by pressing ‘TEST’, ‘TEST’ and
‘38’ (TT-38) on the remote commander, to set up the G2
service adjustment mode.
‘38’ (TT-38) on the remote commander, to set up the G2
service adjustment mode.
3.
Whilst watching the picture, adjust the G2 control [SCREEN]
located on the Flyback Transformer to the point where the
OSD menu indication shows “OK”.
located on the Flyback Transformer to the point where the
OSD menu indication shows “OK”.
Layout of each control
1.
Input an all-white signal from the pattern generator.
2.
Enter into the ‘Service Mode’ by pressing ‘TEST’, ‘TEST’
and ‘MENU’ on the Service Commander.
and ‘MENU’ on the Service Commander.
3.
Select ‘Service’ from the on screen menu display and press
the right arrow button on the remote commander.
the right arrow button on the remote commander.
4.
The ‘Service’ menu will appear on the screen.
[See Page 19]
[See Page 19]
5.
Set the ‘Contrast’ to MAX.
6.
Set the ‘R-Drive’ to 25.
7.
Adjust the ‘G-Drive’ and the ‘B-Drive’ so that the white
balance becomes optimum.
balance becomes optimum.
8.
Press the ‘OK’ button to write the data for each item.
9.
Set the ‘Contrast’ to MIN.
10. Adjust the ‘G-Cutoff’, and the ‘R-Cutoff’ with the left and
right buttons on the remote commander so that the white
balance becomes optimum.
balance becomes optimum.
11. Press the ‘OK’ button to write the data for each item.
White balance adjustment for TV mode
V.STAT
BMC (Hexapole)
Purity
3-3. Focus Adjustment
Screen
Focus
19
Sub Brightness Adjustment
1.
Input a Monoscope 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.
difference between the 0 IRE and 10 IRE signal levels.
1.
Input a video signal that contains a small 100% white area on a
black background.
black background.
2.
Connect an digital voltmeter to Pin 10 of J701 [C Board].
3.
Adjust the Sub-Contrast [‘TT11’] to obtain a voltage of
105 +/- 5V.
105 +/- 5V.
Sub Contrast Adjustment
4-1. Electrical Adjustments
Service adjustments to this model can be performed using the
supplied remote Commander RM-887 (KV-29LS30) or RM-932
(KV-29LS35).
supplied remote Commander RM-887 (KV-29LS30) or RM-932
(KV-29LS35).
‘TT—’ will appear in the upper right corner of the screen.
Other status information will also be displayed.
Other status information will also be displayed.
3.
Press ‘MENU’ on the remote commander to obtain the following
menu on the screen.
menu on the screen.
4.
Move to the corresponding adjustment item using the
up or down arrow buttons on the Remote Commander.
up or down arrow buttons on the Remote Commander.
5.
Press the right arrow button to enter into the required menu item.
6.
Press the ‘Menu’ button on the Remote Commander to quit the
Service Mode when all adjustments have been completed.
Service Mode when all adjustments have been completed.
Note :
•
Before performing any adjustments ensure that the correct model
has been selected in the ‘Model Setting’ menu.
has been selected in the ‘Model Setting’ menu.
•
After carrying out the service adjustments, to prevent the
customer
accessing the ‘Service Menu’ switch the TV set OFF and then
ON.
customer
accessing the ‘Service Menu’ switch the TV set OFF and then
ON.
i+
5
+
(ON SCREEN (DIGIT 5) (VOLUME +) (TV)
DISPLAY)
DISPLAY)
SECTION 4
CIRCUIT ADJUSTMENTS
How to enter into the Service Mode
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4
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.
Commander.
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1
20
Sub Colour Adjustment
1.
Receive a PAL colour bar signal.
2.
Connect an oscilloscope to Pin 5 of CN003 [A Board].
3.
Enter into the ‘Service’ service menu.
4.
Adjust the ‘Sub Colour’ data so that the Cyan, Magenta and
Blue colour bars are of equal levels as indicated below.
Blue colour bars are of equal levels as indicated below.
Same Level
B-Out Waveform
Tuner AGC Adjustment
Note:
There should be no need to adjust the AGC as this is pre-
adjusted during manufacture of the FRONTEND. If the AGC
does need adjustment then follow steps 1. to 4. below.
adjusted during manufacture of the FRONTEND. If the AGC
does need adjustment then follow steps 1. to 4. below.
1. Receive a signal of 62dBuV / 75 ohm terminated via the tuner
antenna socket.
2.
Connect a voltmeter to pin1 of TU101 [print side of A Board]
or to the AGC pin of CN001 [mount side of A Board].
or to the AGC pin of CN001 [mount side of A Board].
3.
Confirm that the AGC voltage is 3.5volts +/- 0.3volts.
4.
If adjustment is required, then re-adjust the AGC variable
resistor (located at the top rear of the FRONTEND) to obtain
a voltage of 3.5V +/- 0.3V.
resistor (located at the top rear of the FRONTEND) to obtain
a voltage of 3.5V +/- 0.3V.
1.
Enter into the ‘Geometry’ service menu.
2.
Select and adjust each item in order to obtain the optimum image.
[ Print side of A board ]
Deflection System Adjustment
V SIZE
V LIN
S CORRECTION
V CENTRE
H CENTRE
H SIZE
PIN AMP
PIN PHASE
CORNER PIN
V ANGLE
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