Sony KV-20S90 Service Manual ▷ View online
— 16 —
KV-20S90 / 21SE43C
4-1. SETTING THE SERVICE ADJUSTMENT
MODE
MODE
1. Standby mode (Power off).
2. Press the following buttons on the remote commander within a
second of each other:
Display
Channel 5
Sound Volumne +
Power
SERVICE ADJUSTMENT MODE ON
1. The CRT displays the item being adjusted.
Mode
Display
Item
Item
Data
SERVICE
HSIZ
0
2. Press 1 or 4 on the Remote Commander to select the item.
3. Press 3 or 6 on the Remote Commander to change the data.
4. Press MUTING then ENTER to write into memory.
SERVICE ADJUSTMENT MODE MEMORY
Mode
WRITE
ENTER
Green
Red
MUTING
SERVICE
1. Press 8 then ENTER on the Remote Commander to initialize.
Mode
Carry out Step 1 when adjusting
IDs 0-7 and when replacing and
adjusting IC003
IDs 0-7 and when replacing and
adjusting IC003
SERVICE
RESET
2. Turn set off then on to exit service adjustment mode.
4-2. MEMORY WRITE CONFIRMATION
METHOD
METHOD
1. After adjustment, pull out the plug from the AC outlet, then replace
the plug in the AC outlet again.
2. Turn the power switch ON and set to Service Mode.
3. Call the adjusted items again to confi rm they were adjusted.
4-3. REMOTE ADJUSTMENT BUTTONS AND
INDICATORS
INDICATORS
SECTION 4: CIRCUIT ADJUSTMENTS
ELECTRICAL ADJUSTMENTS BY REMOTE COMMANDER
Use the Remote Commander
(RM-Y155) to perform the circuit adjustments in this section.
Test Equipment Required: 1. Pattern generator 2. Frequency counter 3. Digital multimeter 4. Audio oscillator
RM-Y155
MUTING
DISPLAY
1
2
3
4
5
6
8
0
VOLUME (+)
POWER
ENTER
(Enter into
memory)
memory)
(Service Mode)
Disp. (Item up)
(Device Item Up)
Disp. (Item down)
(Initialize)
(Service Mode)
Item (Data up)
Item (Data down)
(Device item down)
(Enter into
memory)
memory)
(Remove from
memory)
memory)
(Service Mode)
— 17 —
KV-20S90 / 21SE43C
ADJUSTMENT ITEMS (1 OF 2)
Reg #
ITEM
FUNCTION
DATA
RANGE
INITIAL
DATA
VIDEO
AVERAGE
DATA
1
HSIZ
Horizontal Amp. Adjustment
0-31
31
31
2
HPOS
Horizontal Position Adjustment
0-31
21
20
3
VBOW
Vertical Line Bowing Adj.
0-15
6
6
4
VANG
Vertical line Bowing Slant Adj.
0-15
6
6
5
TRAP
Horizontal Trapezoid Adj.
0-15
15
15
6
PAMP
Horizontal PIN Distortion Adj.
0-31
31
31
7
CPIN
SAME AS PAMP-SCRN TP/BTM
0-31
31
31
8
VSIZ
Vertical Amp. Adjustment
0-31
43
37
9
VPOS
Vertical Position Adj.
0-31
35
38
10
VLIN
Vertical Linearity Adj.
0-15
7
7
11
SCOR
Vertical Amount Adj.
0-15
7
7
12
VZOM
Vertical Zooming
0,1
0
0
13
EHT
Vertical High-Voltage Correction
0-15
15
4
14
ASP
Aspect Ratio Control
0-63
47
47
15
SCRL
16:9 CRT Z Mode Trans. Scroll
0-31
31
31
16
HBLK
RGB Out Width Control
0,1
1
1
17
LBLK
Left Screen HBLK Control
0-15
15
15
18
RBLK
RGT Screen HBLK Control
0-15
3
3
19
VUSN
V Saw Waveform Compress
0,1
0
0
20
HDW
Horizontal Drive Pulse Width
0,1
1
0
21
EWDC
EW/ D.C. Adjustment
0,1
0
0
22
LVLN
Lower Screen BTM Vertical Line Adj.
0-15
0
0
23
UVLN
Upper Screen Top Vertical Line Adj.
0-15
0
0
24
RDRV
R Output Drive Control
0-31
30
27
25
GDRV
G Output Drive Control
0-31
24
22
26
BDRV
B Output Drive Control
0-31
21
22
27
RCUT
R Output Cutoff Control
0-15
10
9
28
GCUT
G Output Cutoff Control
0-15
7
4
29
BCUT
B Output Cutoff Control
0-15
7
4
30
DCOL
Dynamic Color On/Off
0,1
0
0
31
SHUE
Sub HUE
0-15
15
18
32
SCOL
Sub Color
0-15
14
18
33
SBRT
Sub BRIGHTNESS
0-15
7
10
34
RON
R Output On/Off
0,1
1
1
35
GON
G Output On/Off
0,1
1
1
36
BON
B Output On/Off
0,1
1
1
37
AXPL
Axis PAL
0,1
0
0
38
AXNT
Axis NTSC
6.00 ± 0.8
0
0
39
CBPF
Chroma BPF On/Off
0,1
1
1
40
CTRP
Y TRAP FILTER On/Off
6.00 ± 0.9
0
1
41
COFF
Color On/Off
0,1
0
0
42
KOFF
Set Color Killer
6.00 ± 0.8
0
0
43
SSHP
Sub SHARPNESS
0-15
9
6
44
SHPF
SHARPNESS Circuit Fo
0,1
1
1
*
45
PREL
Pre-Shoot / Over-Shoot Switching
0,1
1
1
46
Y-DC
Axis NTSC
0,1
1
1
47
GAMM
Chroma BPF On/Off
0,1
0
0
48
VTH
Color On/Off
0,1
1
1
49
ABLM
ABL Control Mode
0,1
1
1
50
YDEL
Set Color Killer
0,1
7
7
51
NCOL
Sub Sharpness
0-15
1
1
* = TV/VIDEO = 0
— 18 —
KV-20S90 / 21SE43C
Function
Mode
SERVICE
Data
ID0
25
Notes:
No. 1-78 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. 1-78 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.
Reg #
ITEM
FUNCTION
DATA
RANGE
INITIAL
DATA
VIDEO
AVERAGE
DATA
52
FSC
G Output On/Off
0,1
0
1
53
K-ID
B Output On/Off
0,1
0
0
54
HOSC
Horizontal VCO Oscillation Freq.
0-15
10
7
55
VSS
Vertical Sync Slice Level
0,1
0
0
56
HSS
Horizontal Sync Slice Level
0,1
0
0
57
HMSK
HMASK On/Off
0,1
1
1
58
VTMS
Select Signal VTIM Pin
0-3
0
0
59
CDMD
Vertical Count Down Mode Switching
0-3
3
3
**
60
AFC
AFC Loop Gain Switching
0-3
0
0
*
61
FIFR
Field Frequency
0-3
3
3
62
SBAS
Sub Bass
0-15
8
8
63
STRE
Sub Treble
0-15
9
9
64
SBAL
Sub Balance
0-15
13
13
65
DISP
O.S.D Display Position
0-127
15
5
66
PADJ
POWER ADJUSTMENT
0-63
51
42
67
HCHM
H SYNCH SEP. LIMIT FOR TUNER
0-127
69
69
68
HCLM
H SYNCH SEP. LIMIT FOR TUNER
0-127
16
16
69
HCHS
H SYNCH SEP. LIMIT FOR VIDEO
0-127
69
69
70
HCLS
H SYNCH SEP. LIMIT FOR VIDEO
0-127
16
16
71
ID0
0-255
SEE ID MAP
72
ID1
0-255
SEE ID MAP
73
ID2
0-255
SEE ID MAP
74
ID3
0-255
SEE ID MAP
75
ID4
0-255
SEE ID MAP
76
ID5
0-255
SEE ID MAP
77
ID6
0-255
SEE ID MAP
78
ID7
0-255
SEE ID MAP
* = TV/VIDEO = 0
** = TV = 0, VIDEO = 1
** = TV = 0, VIDEO = 1
Model
Destination
ID-0
ID-1
ID-2
ID-3
ID-4
ID-5
ID-6
ID-7
KV-20S90
US
25
3
1
227
3
1
0
0
KV-21SE43C
E
17
3
1
195
115
1
0
0
ID MAP
ADJUSTMENT ITEMS (2 OF 2)
4-4. A BOARD ADJUSTMENTS
H. FREQUENCY ADJUSTMENT
1. InputTV mode (RF) with no signal.
2. Set to Service Adjustment Mode.
3. Connect a frequency counter to base of Q501
(TP-500 H. DRIVE).
4. Check H. Frequency for 15735 ± 200 Hz.
5. Press MUTING then ENTER to save into the memory.
— 19 —
KV-20S90 / 21SE43C
V. FREQUENCY 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 or CN501 pin 6 (V DY+)
connector and ground.
4. Check that V. Frequency shows 60 ± 4 Hz.
SUB CONTRAST ADJUSTMENT (RDRV)
1. Input a color-bar signal.
2. Set the red color on (1).
3. Set in Service Adjustment Mode.
4. Select the item DCOL level to 0.
5. Set the conditions as follows:
PICTURE:
5. Set the conditions as follows:
PICTURE:
MAX
COLOR:
MIN
BRIGHT:
CENTER
R ON:
ON
(1)
G ON:
OFF
(0)
B ON:
OFF
(0)
Display
Item
Mode
26
SERVICE
RON
1: ON
0: OFF
0: OFF
6. Connect an oscilloscope probe to CN301 pin 2 (Red Out) and
ground .
7. Select RDRV with 1 and 4 .
8. Adjust the value of RDRV with 3 and 6 for
1.50 ± 0.05 Vpp.
1.50 ± 0.05 Vpp
White
Black
9. Reset the item DCOL to 1.
10. Press MUTING then ENTER to save into the memory.
11. Return the following back to normal after adjustment.
11. Return the following back to normal after adjustment.
PICTURE:
MAX
COLOR:
CENTER
BRIGHT:
CENTER
R ON:
ON
(1)
G ON:
OFF
(1)
B ON:
OFF
(1)
DISPLAY POSITION ADJUSTMENT (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.
Display
Item
Mode
Item
Data
Data
SERVICE
DISP
15
SUB BRIGHT ADJUSTMENT (SBRT)
1. Input a crosshatch signal.
2. Set to 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. Set to Service Adjustment Mode.
3. Connect a probe to TP47B B-OUT (C Board).
4. Measure white V1 and blue V4.
4.1)
Increase SCOL Register +1 setp.
STANDARD
|V4 - V1| = ± 0.2Vpp
|V3 - V2| = ± 0.2Vpp
|V4 - V1| = ± 0.2Vpp
|V3 - V2| = ± 0.2Vpp
V1
V2
V3
V4
5. Press MUTING then ENTER to save into the memory.
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