Sony KV-XA29M31 Service Manual ▷ View online
– 33 –
KV-XA29M31/XA29M50/
XA29M61/XA34M31
RM-954
(3) Screen-corner Convergence
Fix a Permalloy assy corresponding to the misconverged
areas.
areas.
4-3. FOCUS ADJUSTMENT
FOCUS adjustment should be completed before W/B adjustment.
(Except 34")
1.
Receive digital monoscope pattern.
2.
Set "Picture Mode" to "DYNAMIC".
3. (a) Adjust focus VR so that the center of screen becomes just
focus ( except 25").
(b) Adjust focus VR so that the lion teeth becomes just focus
(25" only).
4. Change the receiving signal to white pattern and blue back.
5. Confirm magenta ring is not noticeable. Incase magenta is very
obvious, adjust focus VR to take balance of magenta ring and
focus.
(For 34")
1.
Receive digital monoscope pattern.
2.
Set "Picture Mode" to "Standard".
3.
Set S2801 to mechanical center position.
4.
Adjust focus VR so that the center of the screen becomes just
focus.
5.
Adjust S2801 when corner focus is unbalance in right and left.
6.
Change the receiving signal to white pattern blue back.
7.
Confirm Magenta ring is not noticeable. Incase magneta ring
is very obvious, reset S2801 to mechanical center posotion
and then adjust FOCUS VR to take balance of MAGENTA
RING and FOCUS.
TLV
Rotate
TLV-2 VOL (29”, 34”) on DY
Rotate
TLV
VOL (25”) on DY
XCV
Rotate
XCV
Adj core on DY
YCH
Rotate
YCH
VOL on DY
TLH
Insert
TLH
Correction Plate to DY Pocket (Left or
Right)
ON DY:
a
b
c
d
Permalloy assembly
b
a
c
d
a-d : screen-corner
misconvergence
misconvergence
YCH
XCV
TLV1
TLV2
FLYBACK TRANSFORMER (T503)
Screen
Focus
– 34 –
KV-XA29M31/XA29M50/
XA29M61/XA34M31
RM-954
2. WHITE BALANCE ADJUSTMENT
1) Set to Service Mode (Refer Section 5-1: ADJUSTMENTS
1) Set to Service Mode (Refer Section 5-1: ADJUSTMENTS
WITH COMMANDER).
2) Input white raster signal.
3) Set the PICTURE to minimum.
4) Select GCT (WHB 4) and BCT (WHB 5) with [1] and [4], and
3) Set the PICTURE to minimum.
4) Select GCT (WHB 4) and BCT (WHB 5) with [1] and [4], and
adjust the level with [3] and [6] for the best white balance.
5) Set the PICTURE to maximum.
6) Select GDR (WHB 1) and BDR (WHB 2) with [1] and [4],
6) Select GDR (WHB 1) and BDR (WHB 2) with [1] and [4],
and adjust the level with [3] and [6] for the best white
balance.
balance.
7) Write into the memory by pressing [MUTING] then [0].
3. SUB BRIGHT ADJUSTMENT
1) Set to service mode.
2) Input a staircase signal of black to white from the pattern
1) Set to service mode.
2) Input a staircase signal of black to white from the pattern
generator.
3) BRIGHTNESS .... 50%.
PICTURE ............ MINIMUM
4) Select SBR (WHB7) with [1] and [4], and adjust SBR
(WHB7) level with [3] and [6] so that the second stripe from
the right is dimly lit.
the right is dimly lit.
4-4. G2 (SCREEN) AND WHITE BALANCE
ADJUSTMENTS
1. G2 (SCREEN) ADJUSTMENT
1) Set the PICTURE to normal.
2) Put to VIDEO input mode without signals.
3) Connect R, G and B of the C6 board cathode to the
1) Set the PICTURE to normal.
2) Put to VIDEO input mode without signals.
3) Connect R, G and B of the C6 board cathode to the
oscilloscope.
4) Adjust BRIGHTNESS to obtain the cathode voltage to the
value below.
5) Adjust G2 (screen) on the FBT until picture shows the point
before cut off.
White
second from the right
Black
0 V
Cathode setting voltage:
180 V
±
2 (VDC)...29"
175 V
±
2 (VDC)...34"
– 35 –
KV-XA29M31/XA29M50/
XA29M61/XA34M31
RM-954
SECTION 5
CIRCUIT ADJUSTMENTS
5-1. ADJUSTMENTS WITH COMMANDER
Service adjustments to this model can be performed using the sup-
plied Remote Commander RM-954
plied Remote Commander RM-954
a. ENTERING SERVICE MODE
With the unit on standby
With the unit on standby
This operation sequence puts the unit into service mode.
The screen display is :
b. METHOD OF CANCELLATION FROM SERVICE
MODE
Set the standby condition (Press [POWER] button on the commander),
then press [POWER] button again, hereupon it becomes TV mode.
c. METHOD OF WRITE INTO MEMORY
1) Set to Service Mode.
2) Press [1] (UP) and [4] (DOWN), to select the adjustment.
4) Press [MUTING] button to indicate WRITE on the screen.
5) Press [0] button to write into memory.
d. MEMORY WRITE CONFIRMATION METHOD
1) After adjustment, pull out the plug from AC outlet, and then
plug into AC outlet again.
2) Turn the power switch ON and set to Service Mode.
3) Call the adjusted items again to confirm adjustments were made.
n
[DISPLAY]
n
5
n
VOL (+)
n
[POWER]
5-2. ADJUSTMENT METHOD
Item Number 00 of device GEO
This explanation uses H-Position as an example.
1. Select “GEO 00 HPS” with the 1 and 4 buttons.
2. Raise/lower the data with the 3 and 6 buttons.
3. Select the optimum state. (The standard is 1F for PAL reception.)
4. Write with the
[MUTING]
button. (The display changes to
WRITE.)
5. Execute the writing with the - button. (The WRITE
display will be changed to red color while excuting, and back to
SERVICE.)
Example on screen display :-
1, 4
Select the adjustment item.
↓
3, 6
Raise/lower the data value.
↓
[MUTING]
Writes.
↓
-
Executes the writing.
7, -
All the data becomes the values in memory.
8, -
All user control goes to the standard state.
5, -
Service data initialization (Be sure not to use
usually.)
2, -
Write 50Hz adjustment data to 60Hz, or vice
versa.
Use the same method for all Items. Use 1 and 4 to select the
adjustment item, use 3 and 6 to adjust, write with [MUTING],
then execute the write with -.
Note : 1. In [WRITE], the data for all items are written into
memory together.
2. For adjustment items that have different standard data
between 50Hz or 60Hz, be sure to use the respective
input signal after adjustment.
input signal after adjustment.
PAL,SECAM:50
NTSC :60
NTSC :60
00
HPS
1C
SERVICE
Data
Mode
Item
Name
Item No
Software version
Suffix No
(OEM Code)
(OEM Code)
Total Power-On time (hours)
p
Marking of new NVM
GEO
1.0C
59
7F
000A
0
032S
Device
Name
50
1F
SERVICE 50
HPS
Adjusted with [3]
and [6] buttons.
and [6] buttons.
GREEN
Write with [MUTING]
Write executed with [0]
GEO
00
7F
0
000A
59
630S 1.0C
GREEN
1F
WRITE
50
HPS
GEO
00
7F
0
000A
59
630S 1.0C
1F
SERVICE 50
HPS
RED
The WRITE display
then the display
returns to green
SERVICE
The WRITE display
then the display
returns to green
SERVICE
GEO
00
7F
0
000A
59
630S 1.0C
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