Sony KV-XF25M21 Service Manual ▷ View online
– 33 –
KV-XF25M21/XF25M63/XF25M93
RM-954
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 C 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:
175 V ±2(VDC)...34",25",21"
180V ±2(VDC)...29"
175 V ±2(VDC)...34",25",21"
180V ±2(VDC)...29"
– 34 –
KV-XF25M21/XF25M63/XF25M93
RM-954
SECTION 4
CIRCUIT ADJUSTMENTS
With the unit on standby
↓
[DISPLAY]
↓
5
↓
VOL (+)
↓
[POWER]
This operation sequence puts the unit into service mode.
4-1. ADJUSTMENTS WITH COMMANDER
Service adjustments are made with the RM-954 that comes with
this unit.
a. ENTERING SERVICE MODE
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.
PAL, SECAM : 50
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 virgin NVM
GEO
1.0C
59
7F
000A
0
601S
Device Name
50
1
4
7
-/--
2
5
8
0
3
6
9
FAVORITE
SOUND
MODE
PIC MODE
ENTER
MENU
A/B
SURROUND
RM-954
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), select an item of adjustment.
3) Press
[MUTING] button and it will indicate WRITE on the screen.
4) 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.
The screen display is :
– 35 –
KV-XF25M21/XF25M63/XF25M93
RM-954
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.)
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.
1F
SERVICE 50
HPS
Adjusted with
[3]
and
[6]
buttons.
GREEN
Written with
[MUTING]
Write executed with
[0]
GEO
00
7F
0
000A
59
601S 1.0C
1F
SERVICE 50
HPS
RED
The WRITE display
then the display
returns to a green
SERVICE.
The WRITE display
then the display
returns to a green
SERVICE.
GEO
00
7F
0
000A
59
601S 1.0C
1F
WRITE
50
HPS
GREEN
GEO
00
7F
0
000A
59
601S 1.0C
– 36 –
KV
-XF25M21/XF25M63/XF25M93
-XF25M21/XF25M63/XF25M93
RM-954
Adjustment Item Table
Device
Functionality
Note
Data Range
Function
Note for
Register
Slava
RAM Address
Name
No
Name
Different Data
No. (bit)
Address
(bit)
GEO
0
HPS
7
3F
H Position
50/60HZ
12 (7-2)
CXA2130S(88H)
96 (7-2)
1
HSZ
1F
3F
H Size
50/60HZ
11 (7-2)
95 (7-2)
2
PAP
1F
3F
Pin Amp
50/60HZ
13 (7-2)
97 (7-2)
3
TLT
7
0F
Trapezium
50/60HZ
15 (7-4)
99 (7-4)
4
VPS
1F
3F
V Position
50/60HZ
0F (7-2)
93 (7-2)
5
VSZ
1F
3F
V Size
50/60HZ
0E (7-2)
92 (7-2)
6
SCO
7
0F
S Correction
50/60HZ
10 (7-4)
94 (7-4)
7
VLN
7
0F
V Linearity
50/60HZ
10 (3-0)
94 (3-0)
8
BOW
7
0F
AFC Bow
50/60HZ
16 (7-4)
9A (7-4)
9
AGL
7
0F
AFC-Angle
50/60HZ
16 (3-0)
9A (3-0)
0A
UPN
1F
3F
Upper Pin
50/60HZ
14 (7-2)
98 (7-2)
0B
LPN
2F
3F
Lower Pin
50/60HZ
18 (7-2)
9C (7-2)
0C
HBL
1
1
H Blanking on/off
18 (1)
6C (1)
0D
LBL
7
0F
Left H Blanking
50/60HZ
17 (7-4)
9B (7-4)
0E
RBL
7
0F
Right H Blanking
50/60HZ
17 (3-0)
9B (3-0)
WHB
0
RDR
1F
3F
R Drive
DYNAMIC/other
09 (7-2)
CXA2130S(88H)
A3 (7-2)
1
GDR
1F
3F
G Drive
DYNAMIC/other
0A (7-2)
A4 (7-2)
2
BDR
1F
3F
B Drive
DYNAMIC/other
0B (7-2)
A5 (7-2)
3
RCT
7
0F
R Cutoff
SECAM/other
07 (3-0)
A7 (3-0)
4
GCT
7
0F
G Cutoff
SECAM/other
08 (7-4)
A8 (3-0)
5
BCT
7
0F
B Cutoff
SECAM/other
08 (3-0)
A8 (3-0)
6
BMN
15
1F
Brightness Minimum Data
06 (7-2)
106
7
SBR
1F
3F
Sub Brightness Control
06 (7-2)
107
SAJ
0
PMX
33
3F
Picture Maximum Data
03 (7-2)
CXA2130S(88H)
105
1
SHU
8
0F
Sub Hue Control
TV/Video
05 (7-2)
108
2
SSH
8
0F
Sub Sharpness Control
TV/Video
07 (7-4)
109
3
SCL
1F
3F
Sub Color Control
NTSC/others
04 (7-2)
10A
VP
0
EHT
4
0F
EHT Comp
50/60HZ
15 (3-0)
CXA2130S(88H)
99 (3-0)
1
GMA
2
03
Gamma Correction
NTSC/others
0B (1-0)
25B (1-0)
2
YDL
6
0F
Y Delay
PAL/SECAM/NTSC
0C (3-0)
A0 (3-0)
3
SST
1
03
SECAM ID Start Position
1B (1-0)
6F (1-0)
4
SSP
1
03
SECAM ID Stop Position
1B (3-2)
6F (3-2)
5
SLV
2
03
SECAM ID Level
1C (1-0)
70 (1-0)
6
SBF
22
3F
SECAM BELL fO
1C (7-2)
70 (7-2)
7
DYC
1
1
Dynamic Color on/off
0A (1)
5E (1)
8
ABL
1
1
ABL Mode Switching (except STANDARD mode)
09 (1)
5D (1)
9
VTH
1
1
ABL Detection Vth Switching
09 (0)
5D (0)
0A
SFO
1
1
FO Switching for Sharpness
NTSC/others
05 (1)
24A (1)
0B
DCX
1
1
DC Trans. Ratio Switching
06 (1)
5A (1)
0C
SHT
1
1
Pre-/Overshoot ratio Switch
NTSC/others
06 (0)
24A (0)
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