Sony KV-AR25M80A Service Manual ▷ View online
– 13 –
KV-AR25M80A
RM-952
2. WHITE BALANCE ADJUSTMENT
1) Set to Service Mode (Refer Section 3-1: ADJUSTMENTS
1) Set to Service Mode (Refer Section 3-1: ADJUSTMENTS
WITH COMMANDER).
2) Input white raster signal.
3) Set the PICTURE to minimum.
4) Select WHB 04 "GCT" and WHB 05 "BCT" with [1] and
3) Set the PICTURE to minimum.
4) Select WHB 04 "GCT" and WHB 05 "BCT" with [1] and
[4], and adjust the level with [3] and [6] for the best
white balance.
white balance.
5) Set the PICTURE to maximum.
6) Select WHB 01 "GDR" and WHB 02 "BDR" with [1] and [4],
6) Select WHB 01 "GDR" and WHB 02 "BDR" 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 WHB 07 "SBR" with [1] and [4], and adjust WHB 07
"SBR" level with [3] and [6] so that the second stripe from the
right is dimly lit.
right is dimly lit.
2-4. 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.
0 V
Cathode setting voltage:
180 V
180 V
± 2 (VDC)
second from the right
Black
White
– 14 –
KV-AR25M80A
RM-952
SECTION 3
CIRCUIT ADJUSTMENTS
3-1. 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
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]
3-2. 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.)
[MUTING]
, -
Write 50Hz adjustment data to 60Hz, or vice
versa.
2, -
Copy and write all data.
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
SERVICE
50
1C
p
GEO
0.3A
59
7F
000A
0
638S
Device
Name
Suffix No
(OEM Code)
(OEM Code)
Item
Name
Marking of new NVM
Item No
Software version
Total Power-On time (hours)
Data
Mode
1F
50
HPS
SERVICE
GEO
00
7F
0
000A
59
0.3A
1F
WRITE
50
HPS
GEO
00
7F
0
000A
59
0.3A
1F
50
HPS
WRITE
GEO
00
7F
0
000A
59
0.3A
GREEN
Write with [MUTING]
Write executed with
GREEN
RED
The WRITE display
then the display
returns to green
SERVICE.
The WRITE display
then the display
returns to green
SERVICE.
Adjusted with 3
and 6 buttons.
and 6 buttons.
638S
638S
638S
–
15
–
KV
-AR25M80A
-AR25M80A
RM-952
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–
16
–
KV
-AR25M80A
-AR25M80A
RM-952
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