Sony KV-20FS120 Service Manual ▷ View online
18
KV-20FS120/21FM120/21FS120/21FA310/24FS120/25FS120
KV-20FS120/21FM120/21FS120/21FA310/24FS120/25FS120
Q590
T505
602
R505
C624
C505
C506
D598
C582
L588
Q522
IC565
IC545
IC561
L513
L511
HS522
C525
L525
D526
C513
D006
L516
C514
D545
D566
L582
C526
C511
C512
C618
CN515
R574
R528
R529
R537
R557
R549
R533
R534
C548
C529
Q402
C530
C540
R526
R593
R506
R570
R569
R568
R547
R502
R589
R411
R408
R594
R583
R546
C561
C212
C451
C571
D568
D630
D569
D528
D567
R540
R541
R566
D562
R532
R511
C640
C610
604
602
C595
C545
C547
R504
C544
C562
C528
C527
0
R581
C504
C502
D601
L515
R510
R588
R515
D624
Q505
Q506
R512
R514
R901
R548
R902
C625
T511
PS401
L371
L370
JR12
JR505
C651
R503
R591
C590
R609
C597
T585
R437
R598
Q521
R575
C510
D506
E
B
6
4
1
3
HDY-
HDY-
HDY+
HDY+
VDY-
VDY+
H-OUT
N/C
200V
GND
HEATER
-13V
GND
+13V
N/C
ABL
GND
GND
HDT
V.OUT
H-OUT
H-OUT
1
2
6
7
H.PROT
1
6
135V
TP21
TP28
TP29
TP27
TP19
TP20
TP17
TP16
TP33
TP30
TP24
TP25
E
B
TP23
TP31
TP22
C
E
B
FBT
E
B
( )
FIGURE 1
TP23
X
R565
C566
+
-
DIGITAL
MULTIMETER
MULTIMETER
+
-
POWER
SUPPLY
SUPPLY
1SS119
AMMETER
3mA dc range
3mA dc range
+
-
A
19
KV-20FS120/21FM120/21FS120/21FA310/24FS120/25FS120
KV-20FS120/21FM120/21FS120/21FA310/24FS120/25FS120
4-1. SETTING THE SERVICE ADJUSTMENT
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.
service defl hsiz
16
ntsc
vchp 00000000 00000000
Category
Display
Item
Mode
Item
Data
Data
Signal
Type
Type
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
service defl hsiz
16
ntsc
vchp 00000000 00000000
Category
Display
Item
Mode
Item
Data
Data
Signal
Type
Type
write
1. Press 8 then ENTER on the Remote Commander to initialize.
service defl hsiz
16
ntsc
vchp 00000000 00000000
Category
Display
Item
Mode
Item
Data
Data
Signal
Type
Type
write
Carry out Step 1 when adjusting
IDs 0-6 and when replacing and
adjusting IC002
IDs 0-6 and when replacing and
adjusting IC002
3. Press MUTING then ENTER to write into memory.
2. Turn set off then on to exit Service Adjustment Mode.
2. Turn set off then on to exit Service Adjustment Mode.
SECTION 4: CIRCUIT ADJUSTMENTS
Electrical AdjustmenTs by Remote Commander
Use the Remote Commander
(RM-Y194, RM-W151, RM-Y180) to perform the circuit adjustments in this section.
Test Equipment Required: 1. Pattern generator 2. Frequency counter 3. Digital multimeter 4. Audio oscillator
4-2. MEMORY WRITE CONFIRMATION
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
VOLUME (+)
(Service Mode)
6
Item
(Data down)
(Data down)
ENTER
(Enter into
memory)
memory)
0
(Remove from
memory)
memory)
3
Item
(Data up)
(Data up)
RM-Y180
5
(Device item
down)
down)
MUTING
(Enter into
memory)
memory)
1
Disp. (Item up)
2
(Device Item Up)
4
Disp. (Item down)
8
(Initialize)
DISPLAY
(Service Mode)
POWER
(Service Mode)
KV-20FS120/21FM120/21FS120/21FA310/24FS120/25FS120
20
KV-20FS120/21FM120/21FS120/21FA310/24FS120/25FS120
4-4. SERVICE DATA LISTS
NTSC
Init
Data
VERSION
Fix
0
VER
Microprocessor version information
=
VAR
1
HSIZ
H-SIZE ( EW DC : YUV OFFSET )
29
VAR
2
HPOS
H POSITION: YUV OFFSET
37
VAR
3
VSIZ
V RAMP SIZE: YUV OFFSET
35
VAR
4
VPOS
V POSITION (RAMP DC) NOT USEFUL: YUV OFFSET
33
VAR
5
VLIN
V LINEARITY
31
VAR
6
SCOR
S CORRECTION
26
VAR
7
VBOW
BOW
37
VAR
8
VANG
ANGLE
31
VAR
9
TRAP
EW TRAPESIUM
25
VAR
10
PAMP
PARABOLA ( EW PIN )
9
VAR
11
UPIN
UPPER CORNER ( UPPER PIN )
32
VAR
12
LPIN
LOWER CORNER ( LOWER PIN )
32
VAR
13
TROT
TROT
109
VAR
14
HBLK
FBPBLK ( H BLK MODE SELECT )
0
VAR
15
RBLK
HBLK R POS ( HBLK REAR TIMING: YUV OFFSET )
15
VAR
16
LBLK
HBLK F POS ( HBLK FRONT TIMING: YUV OFFSET )
48
FIX
17
VBLK
VBLK POS ( V BLK WIDTH )
0
FIX
18
HMSK
Macro OFF ( TOP VEND [ WHEN MACROVISION ] PREVENT
OFF )
OFF )
0
FIX
19
HDW
IIC_HOUT_DUTY ( H PULSE WIDTH [ 25u/19u ]
1
FIX
20
AFC
H AFC Gain ( AFC GAIN )
0
FIX
21
AFC1
H Charge pump ( AFC1 TIME CONSTANT )
3
FIX
22
AFCW
AFC1 PULLIN ( AFC1 PULL IN WIDE )
0
FIX
23
CDMD
V CD MODE ( V DET WINDOW SW TIMING )
1
FIX
24
HSS
SYNC SLICE LVL(H) ( SYNC SLICE LEVEL [ H sepa ] )
0
FIX
25
VSS
SYNC SLICE LVL(L) ( SYNC SLICE LEVEL [ V sepa ] )
3
FIX
26
SLDN
AUTO SLICE DOWN ( AUTO SLICE LEVEL DOWN )
0
FIX
27
SLUP
AUTO SLICE UP ( AUTO SLICE LEVEL UP )
0
FIX
28
JPSW
VJPSW ( JUMP SW )
0
FIX
29
HOSC
H VCO FOR OFFSET ADJUST OFFSET
5
FIX
30
EHT
EHT
4
FIX
31
EHTG
EHT GAIN ( EHT MODE )
1
Description
Fix/ Var
No.
Name
Service
Group
DEF
KV-20FS120/21FM120/21FS120/21FA310/24FS120/25FS120
21
KV-20FS120/21FM120/21FS120/21FA310/24FS120/25FS120
NTSC
Init
Data
VAR
1
VSIZ
V RAMP SIZE
55
VAR
2
VPOS
V POSITION ( RAMP DC )
37
VAR
3
VLIN
V LINEARITY
30
VAR
4
SCOR
S CORRECTION
20
VAR
5
TRAP
EW TRAPESIUM
30
VAR
6
PAMP
PARABOLA ( EW PIN )
0
VAR
7
UPIN
UPPER CORNER ( UPPER PIN )
34
VAR
8
LPIN
LOWER CORNER ( LOWER PIN )
32
VAR
9
ABLG
ABL GAIN
15
VAR
10
SCON
SUB CONTRAST LEVEL
10
VAR
11
VPW
JUMP PULSE WIDTH
1
NTSC
Init
Video
YUV
16:09
Data
VAR
1
RDRV
R DRIVE
45
45
45
N/A
VAR
2
GDRV
G DRIVE: GDOF OFFSET ( only Color Temp. "Warm")
28
28
30
N/A
VAR
3
BDRV
B DRIVE: BDOF OFFSET ( only Color Temp. "Warm")
33
33
29
N/A
VAR
4
RCUT
HARDWARE AKB (R) CMP DATA
120
120
120
N/A
VAR
5
GCUT
HARDWARE AKB (G) CMP DATA
98
98
72
N/A
VAR
6
BCUT
HARDWARE AKB (B) CMP DATA
102
102
91
N/A
VAR
7
SCON
SUB CONTRAST LEVEL
16
16
16
N/A
VAR
8
SHUE
SUB TINT (HUE)
7
7
7
N/A
VAR
9
SCOL
SUB COLOR LEVEL
17
17
27
N/A
VAR
10
SBRT
SUB BRIGHTNESS
11
11
14
N/A
FIX
11
RON
R OUTPUT ON ( 0:R OUTPUT OFF 1:R OUTPUT ON )
1
FIX
12
GON
G OUTPUT ON ( 0:R OUTPUT OFF 1:R OUTPUT ON )
1
FIX
13
BON
B OUTPUT ON ( 0:R OUTPUT OFF 1:R OUTPUT ON )
1
Fix/ Var
No.
Service
Group
Item name & ( Description )
Name
Name
Item name & ( Description )
No.
VP1
Service
Group
Fix/ Var
16 : 9
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