Sony KV-XG25M8J Service Manual ▷ View online
– 29 –
KV-XG25M8J/XG25P50
RM-952
5
Y separation axis correction magnet adjustment.
1. Receive the cross-hatch signal and adjust [PICTURE] to [MIN]
and [BRIGHTNESS] to [STANDARD] .
2. Adjust the Y separation axis correction magnet on the neck
assembly so that the horizontal lines at the top and bottom of
the screen are straight.
Note
1. The Red and Blue magnets should be equally far from the
horizontal center line.
2. Do not separate the Red and Blue magnets too far. (Less than
8 mm)
(2) Dynamic Convergence Adjustment
Preparation:
• Before starting this adjustment, adjust the horizontal static
• Before starting this adjustment, adjust the horizontal static
convergence and the vertical static convergence
4
BMC (Hexapole) Magnet.
If the red, green and blue dots are not balanced or aligned, then
use the BMC magnet to adjust in the manner described below.
R G
B
R
G
B
R
G B
R
B
R
G
G
G
B
R
B
Blue
Red
VM1 board
Blue
Red
VM1 board
Neck assy
Neck assy
R B
R B
TLH
TLV
YCH
XCV
B
R
R
B
– 30 –
KV-XG25M8J/XG25P50
RM-952
(3) Screen-corner Convergence
Fix a Permalloy assy corresponding to the misconverged
areas.
areas.
3-3. FOCUS ADJUSTMENT
Focus sdjustment should be completed before WB adjustment.
FLYB ACK TRANSFORMER (T503)
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:
YCH
XCV
TLV1
TLV2
b
a
c
d
a-d : screen-corner
misconvergence
misconvergence
a
b
c
d
Permalloy assembly
Screen
Focus
FOCUS ADJUSTMENT
1) Receive digital monoscope pattern.
2) Set "AV CONTROL" to "DYNAMIC"
3) a) 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 a FOCUS VR to take
balance between MAGENTA RING and FOCUS.
– 31 –
KV-XG25M8J/XG25P50
RM-952
2. WHITE BALANCE ADJUSTMENT
1) Set to Service Mode (Refer Section 4-1: 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
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]
, and
adjust the level with
[3]
and
[6]
for the best white 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
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.
3-4. 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
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.
Cathode setting voltage:
175V ±2(VDC)...25"
175V ±2(VDC)...25"
0 V
White
second from the right
Black
– 32 –
KV-XG25M8J/XG25P50
RM-952
SECTION 4
CIRCUIT ADJUSTMENTS
4-1. ADJUSTMENTS WITH COMMANDER
Service adjustments to this model can be performed using the
supplied Remote Commander RM-952.
supplied Remote Commander RM-952.
a. ENTERING SERVICE MODE
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]
4-2. 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
1.1A
(KV-XG25M8J)
1.1T
(KV-XG25P50)
59
7F
000A
0
631S
632S
632S
Device
Name
GEO
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
631S
632S
1.1A
1.1T
GREEN
1F
WRITE
50
HPS
GEO
00
7F
0
000A
59
631S 1.1A
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
631S 1.1A
(KV-XG25M8J)
(KV-XG25P50)
632S 1.1T
(KV-XG25M8J)
(KV-XG25P50)
632S 1.1T
(KV-XG25M8J)
(KV-XG25P50)
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