Sony KV-J25MF8J Service Manual ▷ View online
– 21 –
SECTION 4
SELF DIAGNOSIS FUNCTION
If no acknowledgement is returned from a device which is turned "ON", the device has a problem.
In this case, one of the LED's responding to the problem device will flicker a defined number of times.
The flickering frequuncy responding to each failed device is shown below.
Board name
A Board
A Board
A Board
A Board
Ref. No
IC003
IC1201
IC104
IC206
Device
NONVOLA-
AV SWITCH
MAIN Y/C
AUDIO
TILE
(CXA1855S)
(CXA2050S)
PROCESSOR
MEMORY
(TDA8424)
Flickering
Frequency
1
2
3
6
All the device are checked one after another from the left on the table.
If an error is found, the responding LED will start flickering.
So, if more than 2 device are failed, the one on the left side will start flickering first.
– 22 –
Entering service mode
With the unit on standby
↓
DISPLAY
↓
5
↓
VOL (+)
↓
POWER
The operation sequence puts the unit into service mode.
SECTION 5
CIRCUIT ADJUSTMENTS
5-1. ADJUSTMENTS WITH COMMANDER
Service adjustments are made with the RM-871 that comes with
this unit.
1, 4
Select the adjustment item.
↓
3, 6
Raise/lower the data value.
↓
MUTING
Writes.
↓
0
Executes the writing.
7,
0
All the data becomes the values in memory.
8,
0
All user control goes to the standard state.
5,
0
Service data initialization (Be sure not to use
usually.)
2,
0
Write 50Hz adjustment data to 60Hz, or vice
versa.
The screen display is :
Depends on the signals
PAL, SECAM : 50
NTSC : 60
00
VSH
1F
SERVICE
50
XXX
00 00 00
20
V2
1C
DATA
Mode
Adjstment item
Item number
SOFTWAR VERSION
H SYNC COUNTER
OEM CODE
RM-873
MUTING
TEXT
MENU
A/B
ENLARGE
WAKE UP
INDEX
SLEEP
TEXT CLR
JUMP
POWER
TV
DISPLAY
REVEAL
VIDEO
HOLD
1
2
3
4
5
6
7
8
9
0
MENU
PROGR
VOL
R
RM-873
– 23 –
5-2. ADJUSTMENT METHOD
Item Number 00
This explanation uses V-Position as an example.
1. Select 00 VSH 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 IF for PAL reception.)
4. Write with the MUTING button. (The display changes to
WRITE.)
5. Execute the writing with the
0
button. (The WRITE
display will be changed back to SERVICE.)
Use the same method for Items Number 00-96. Use 1 and 4 to
select the adjustment item, use 3 and 6 to adjust, write with
MUTING , then execute the write with
0
.
Note : In WRITE , the data of all items are into memory.
•
As for V-FREQ, by searching the bolded screen V range with
adjusting data.
Note : For adjustment Items that have differnt standard data
between 50Hz or 60Hz and novwel or wid, be sure to use
the respective input signal ather adjusting.
GREEN
1F
VSF
00
GREEN
1F
VSF
Adjusted with
[3]
and
[6]
buttons
Written with
[MUTING]
Write executed with
[0]
GREEN
The WRITE display
then the display
returns to a green
SERVICE.
1F
VSF
00
SERVICE 50
WRITE 50
WRITE 50
00
– 24 –
Adjustment Item Table
Note: Bold items are fixed data.
* : NTSC , NO MARK : PAL
Item
Adjustment
Data
Standard data
Note
Device
number
Item
range
J29
J25
00
VSH
00-3F
1F
V Position
CXA2050S
01
VSZ
00-3F
1F
V Size
(Y/C/J)
02
HSH
00-0F
07
H Position
Slv:88H
03
HSZ
00-3F
1F
H Size
04
SRC
00-0F
07
S Correction
05
VLN
00-0F
07
V Linearity
06
PAP
00-3F
1F
Pin Comp
07
PPH
00-0F
07
Pin Phase
08
UCP
00-0F
07
Up Corner Pin
09
LCP
00-0F
07
Low Corner Pin
0A
BOW
00-0F
07
AFC-Bow
0B
ANG
00-0F
07
AFC-Angle
0C
VAP
00-3F
2F
V Aspect
0D
VSC
00-3F
1F
V Scroll
0E
ULN
00-0F
00
UP V Linearity
0F
LLN
00-0F
00
LOW V Linearity
10
EHH
00-03
01
00
EHT-H
11
EHV
00-03
01
EHT-V
12
HBS
00-01
01
H Blk Wid. ON/OFF
13
LBK
00-0F
0F
L Blk Width
14
RBK
00-0F
0F
R Blk Width
15
JSW
00-01
00
Jump ON/OFF Sw
16
VBW
00-03
02
V Blk Wid. Con.
17
AFC
00-03
01
AFC-Mode
18
FHH
00-01
00
FH-HI
19
VFQ
00-03
00
V-Freq
1A
VOF
00-01
00
V OFF
1B
VMD
00-01
00
CD-Mode 2
1C
CMD
00-01
00
CD-Mode
1D
ITL
00-03
00
Inter Iace
1E
ZSW
00-01
00
ZOOM SW
1F
POV
00-03
03
Pre-Over
20
CT1
00-01
01
C-Trap(NTSC)
21
CT2
00-01
00
C-Trap(PAL)
22
CF0
00-0F
00
C-Trap f0 Adj
23
SF0
00-01
00
01
Sharpness f0 Adi
24
TOT
00-01
01
TOT Filter SW
25
CSW
00-03
00
Color SW
26
XTL
00-03
00
Xtal
27
CV1
00-01
01
CV/YC Select(NTSC)
28
CV2
00-01
00
CV/YC Select(PAL)
29
VM
00-01
01
VM ON/OFF
2A
YVM
00-01
00
YSI/VM SW(0:YSI)
2B
DPC
00-01
01
D-Pic ON/OFF
2C
DCO
00-01
01
Dynamic Color
2D
GMM
00-03
01
Gamma
2E
DTR
00-01
01
DC-Tran
2F
DL1
00-07
01
Delay Ctrl.(PAL)
30
DL2
00-07
03
Delay Ctrl.(NTSC)
31
DL3
00-07
03
Delay Ctrl.(SECAM)
32
SCN
00-0F
09
Sub-Contrast
33
SC1
00-0F
07
Sub-Color(PAL)
34
SC2
00-0F
06
Sub-Color(NTSC)
35
SH1
00-0F
07
Sub-Hue(TV)
36
SH2
00-0F
07
Sub-Hue(VIDEO)
37
SBR
00-3F
1F
Sub-Bright
38
SSH
00-07
04
04
Sub-Sharpness
39
GDR
00-3F
2C
G-Drive
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