Sony KV-25FS12 Service Manual ▷ View online
— 17 —
KV-25FS12 / 25FS12C
ADJUSTMENT ITEMS (1 OF 2)
Reg # ITEM
FUNCTION
RANGE
FIX
DATA
NTSC
VIDEO
RF
AVERAGE
DATA
1
HSIZ
Horizontal Size Adjustment
0-63
35
38
2
HPOS Horizontal Position Adjustment
0-63
33
21
3
VBOW Vertical Line Bowing Adj.
0-15
5
9
4
VANG Vertical line Bowing Slant Adj.
0-15
7
5
5
TRAP
Horizontal Trapezoid Adj.
0-15
7
7
6
PAMP Horizontal PIN Distortion Adj.
0-63
7
32
7
UPIN
Upper PIN Distortion Adj.
0-63
36
39
8
LPIN
Lower PIN Distortion Adj.
0-63
36
39
9
VM
Velocity Modulation On/Off
0,1
0
10
BLKO
Vertical Blanking On/Off
0,1
0
0
11
VMLV Velocity Modulation Level
0-3
2
12
AGN2 Aging 2
0,1
0
0
13
REFP
Reference Pulse Position
0,1
0
0
14
VBLK
Vertical Blanking On/Off
0,1
0
0
15
JPSW
0,1
0
0
16
VSIZ
Vertical Size Adjustment
0-63
40
49
17
VPOS Vertical Position Adj.
0-63
32
32
18
VLIN
Vertical Linearity Adj.
0-15
7
6
19
SCOR Vertical "S" Correction Adjustment
0-15
6
8
20
VZOM 16:9 CRT Z Mode On/Off
0,1
0
0
21
EHT
Vertical High-Voltage Correction
0-15
6
6
22
ASP
Aspect Ratio Control
0-63
47
47
23
SCRL 16:9 CRT Z Mode Trans. Scroll
0-63
31
31
24
HBLK
Horizontal Blanking On/Off
0,1
1
1
25
LBLK
Left Blanking Adjustment
0-15
11
12
26
RBLK
Right Blanking Adjustment
0-15
8
5
27
VUSN V Saw Waveform Compress
0,1
0
0
28
HDW
Horizontal Drive Pulse Width
0,1
1
1
29
EWDC "Parabola" EW/ D.C. Adjustment
0.1
0
0
30
LVLN
Lower Screen BTM Vertical Line Adj.
0-15
0
0
31
UVLN
Upper Screen BTM Vertical Line Adj.
0-15
0
0
32
HTRP Horizontal Trapezoid Adj.
0,1
0
0
33
RDRV R Output Drive Control
0-63
31
36
34
GDRV G Output Drive Control
0-63
21
26
35
BDRV B Output Drive Control
0-63
21
25
36
RCUT R Output Cutoff Control
0-15
10
8
37
GCUT G Output Cutoff Control
0-15
6
6
38
BCUT B Output Cutoff Control
0-15
6
7
39
DCOL Dynamic Color On/Off
0,1
0
1
40
SHUE Sub HUE
0-31
15
15
41
SCOL Sub Color
0-31
15
15
42
SBRT
Sub BRIGHTNESS
0-31
16
15
43
RON
R Output On/Off
0,1
1
1
44
GON
G Output On/Off
0,1
1
1
45
BON
B Output On/Off
0,1
1
1
46
AXPL
Axis PAL
0,1
0
0
47
AXNT
Axis NTSC
0,1
1
0
48
CBPF
Chroma BPF On/Off
0,1
1
1
49
CTRP Y TRAP FILTER On/Off
0,1
1
1
50
COFF Color On/Off
0,1
0
0
51
KOFF
Set Color Killer
0,1
0
0
52
SSHP Sub SHARPNESS
0-15
5
7
Palette mode controls this register
Palette mode controls this register
— 18 —
KV-25FS12 / 25FS12C
ADJUSTMENT ITEMS (2 OF 2)
service id’s id5
19
ntsc
M37280MK-00SP VERB.O
Function
ID
Number
Mode
Data
Signal
Type
Type
00010011
Chip
Version
Version
Reg # ITEM
FUNCTION
RANGE
FIX
DATA
NTSC
VIDEO
RF
AVERAGE
DATA
53
SHPF
SHARPNESS Circuit Fo
0,1
1
54
PREL
Pre-Shoot / Over-Shoot
0,1
1
1
55
Y-DC
DC Transmission Ratio Switching
0,1
1
56
GAMM Gamma Correction Amnt
0-3
1
57
ABLM ABL Mode Switching
0,1
1
1
58
VTH
ABL CD VHT Switching
0,1
1
1
59
YDEL
Y Delay Time Control
0-15
7
7
60
NCOL No Color ID
0,1
1
1
61
FSC
FSC Out On/Off
0,1
1
1
62
K-ID
Killer ID Control On/Off
0,1
0
0
63
HOSC Horizontal VCO Oscillation Freq.
0-15
7
7
64
VSS
Vertical Sync Slice Level
0,1
0
0
65
HSS
Horizontal Sync Slice Level
0,1
0
0
66
HMSK
0,1
0
0
67
VTMS Select Signal VTIM Pin
0-3
0
0
68
CDMD Vertical Count Down Mode Switching
0-3
3
0
0
69
AFC
AFC Loop Gain Switching
0-3
0
0
0
0
70
FIFR
Field Frequency
0-3
3
3
3
71
SBAL
Sub Balance
0-15
5
7
72
SBAS
Sub Bass
0-15
0
9
73
STRE
Sub Treble
0-15
3
9
74
BBEL
BBE Low
0-15
4
12
75
BBEH BBE High
0-15
5
9
76
SRND Surround
0,63
0
13
77
BBE
BBE On/Off
0,1
0
1
78
DISP
O.S.D Display Position
0-63
15
15
79
TROT Tilt Correction
0-63
31
31
80
HCLW Horizontal Count Lower Limit
0-127
16
16
81
HCHG Horizontal Count High Limit
0-127
64
64
82
ABL0
0,1
4
1
83
ABL1
0-7
Palette mode controls this register
7
84
SYSC Color System
0-7
0
6
85
VENH Vertical Enhancement
0-7
0
4
86
CBPC
0,1
3
0
87
BYCF
0,1
0
0
88
KILC
0,1
Palette mode controls this register
0
89
LDOT
0,1
1
0
90
CORE
0,1
1
0
91
CHTR
0,1
0
92
CHPF
0,1
1
93
ENHO
0,1
0
94
ID0
0,255
25
17
95
ID1
0,255
3
19
96
ID2
0,255
91
223
97
ID3
0,255
2
2
98
ID4
0,255
233
233
99
ID5
0,255
17
19
100
ID6
0,255
0
0
Palette mode controls this register
Palette mode controls this register
Palette mode controls this register
Notes:
No. 1-100 show the order that each adjustment mode may be selected while in Service Mode.
Data Range shows the range of possible setting for each Adjustment Mode.
Initial Data shows the standard settings for each Adjustment Mode.
No. 1-100 show the order that each adjustment mode may be selected while in Service Mode.
Data Range shows the range of possible setting for each Adjustment Mode.
Initial Data shows the standard settings for each Adjustment Mode.
— 19 —
KV-25FS12 / 25FS12C
4-4. MB BOARD ADJUSTMENTS
H. FREQUENCY (FREE RUN) CHECK
1. Input a TV mode (RF) with no signal.
2. Connect a frequency counter to base of Q501
(TP-500 H. DRIVE) on the A Board.
3. Check H. Frequency for 15735 ± 200 Hz.
V. FREQUENCY (FREE RUN) CHECK
1. Select video 1 with no signal input.
2. Set the conditions for a standard setting.
3. Connect the frequency counter to TP-508 (V OUT) or CN501 pin 6
(V DY+) and ground on the A Board .
4. Check that V. Frequency shows 60 ± 4 Hz.
DRIVE (RDRV)
1. Input a color-bar signal and set the level to 75%.
2. Set in Standard mode.
3. Activate the Service Adjustment Mode.
4. Set both GON and BON items. Using 3 and 6 set each to the
4. Set both GON and BON items. Using 3 and 6 set each to the
following values. Leave RON set to “1”.
service video rdrv
26
ntsc
vchp
Category
Display
Item
Mode
Item
Data
Data
Signal
Type
Type
00000000 00000000
R ON: ON
(1)
G ON: OFF
(0)
B ON: OFF
(0)
5. Connect an oscilloscope probe to CB Board, J701 Pin 12 (KR) (Red
Out) .
6. Select RDRV with 1 and 4 .
7. Adjust the value of RDRV with 3 and 6 for
92.0 ± 2 VDC.
92.0 ± 2VDC
8. Reset GON and BON values to “1”.
R ON: ON
(1)
G ON: ON
(1)
B ON: ON
(1)
9. Press MUTING then ENTER to save into the memory.
DISPLAY POSITION A DJUSTMENT (DISP)
1. Input a color-bar signal.
2. Set to Service Adjustment Mode.
3. Select DISP with 1 and 4 .
4. Adjust values of DISP with 3 and 6 to adjust characters to the center.
5. Write to memory by pressing MUTING then ENTER .
6. Check to see if the text is displayed on the screen.
service micro disp
48
ntsc
vchp
Category
Display
Item
Mode
Item
Data
Data
Signal
Type
Type
00000000 00000000
SUB BRIGHT ADJUSTMENT (SBRT)
1. Input a monoscope signal.
2. Activate the Service Adjustment Mode.
3. Set the PICTURE and BRIGHTNESS to minimum.
4. Select the SBRT item with 1 and 4 .
5. Adjust the values of SBRT with 3 and 6 to obtain a faintly visible
crosshatch.
6. Press MUTING then ENTER to save into the memory.
SUB HUE, SUB COLOR ADJUSTMENT (SHUE,
SCOL)
SCOL)
1. Input a color-bar signal.
2. Activate the Service Adjustment Mode.
3. Connect an oscilloscope probe to CB Board, CN705 Pin 4 Blue Out.
4. Select the SHUE and SCOL item with 1 and 4 .
5. While showing the SHUE item, adjust the waveform with 1 and 4
until the second and third bars show the same level (V2 = V3 < 0.1
Vp-p).
Vp-p).
6. While showing the SCOL item, adjust the waveform with 3 and 6
until the fi rst and fourth bars show the same level (V1 = V4 < 0.1
Vp-p).
Vp-p).
V1
V2 V3 V4
7. Press MUTING then ENTER to save into the memory.
V. SIZE ADJUSTMENT (VSIZ)
1. Input a crosshatch signal.
2. Activate the Service Adjustment Mode.
3. Select the VSIZ item with 1 and 4 .
4. Adjust value of VPOS with 1 and 4 for the best vertical center.
5. Press MUTING then ENTER to save into the memory.
— 20 —
KV-25FS12 / 25FS12C
V. CENTER ADJUSTMENT (VPOS)
Perform this adjustment after performing H. Frequency
(Free Run) Check.
1. Input a crosshatch signal.
(Free Run) Check.
1. Input a crosshatch signal.
2. Activate the Service Adjustment Mode.
3. Select the VPOS item with 1 and 4 .
4. Adjust value of VPOS with 3 and 6 for the best vertical center.
5. Press MUTING then ENTER to save into the memory.
H. CENTER ADJUSTMENT (HPOS)
Perform this adjustment after performing H. Frequency
(Free Run) Check.
1. Input a crosshatch signal.
(Free Run) Check.
1. Input a crosshatch signal.
2. Activate the Service Adjustment Mode.
3. Select the HPOS item with 1 and 4 .
4. Adjust the value of HPOS with 3 and 6 for the best horizontal center.
5. Press MUTING then ENTER to save into the memory.
H. SIZE ADJUSTMENT (HSIZ)
1. Input a monoscope signal.
2. Activate the Service Adjustment Mode.
3. Select HSIZ with 1 and 4 .
4. Adjust with 3 and 6 for the best horizontal size.
5. Press MUTING then ENTER to save into the memory.
V. LINEARITY (VLIN), V. CORRECTION
(SCOR), PIN AMP (PAMP), AND HORIZONTAL
TRAPEZOID (HTRP) ADJUSTMENTS
(SCOR), PIN AMP (PAMP), AND HORIZONTAL
TRAPEZOID (HTRP) ADJUSTMENTS
1. Input a crosshatch signal.
2. Activate the Service Adjustment Mode.
3. Select VLIN, SCOR, PAMP, and HTRP with with 1 and 4 .
4. Adjust with 3 and 6 for the best horizontal size.
5. Press MUTING then ENTER to save into the memory.
V LINEARITY (VLIN)
V CORRECTION (SCOR)
PIN AMP (PAMP)
HORIZONTAL TRAPEZOID (HTRP)
V. ANGLE (VANG), V. BOW (VBOW), UPPER
PIN (UPIN) AND LOW PIN (LPIN)
ADJUSTMENTS
PIN (UPIN) AND LOW PIN (LPIN)
ADJUSTMENTS
1. Input a crosshatch signal.
2. Activate the Service Adjustment Mode.
3. Select VANG, VBOW, UPIN, and LPIN with 1 and 4 .
4. Adjust with 3 and 6 for the best picture.
5. Press MUTING then ENTER to save into the memory.
V ANGLE (VANG)
V BOW (VBOW)
UPPER PIN (UPIN)
LOW PIN (LPIN)
SERVICE ADJUSTMENT MODE MEMORY
1. After completing all adjustments, press 0 then ENTER .
Read From Memory
Green
Red
ENTER
0
service defl vbow
7
ntsc
vchp
Category
Display
Item
Mode
Item
Data
Data
Signal
Type
Type
00000000 00000000
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