Sony KV-28CS70B Service Manual ▷ View online
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4-1. Electrical Adjustments
Service adjustments to this model can be performed using the
supplied remote Commander RM-947 (KV-28/32CS70B,
KV-28/32CS70E, KV-32CS70K) or RM-932 (KV-28/32CS70U).
supplied remote Commander RM-947 (KV-28/32CS70B,
KV-28/32CS70E, KV-32CS70K) or RM-932 (KV-28/32CS70U).
SECTION 4 CIRCUIT ADJUSTMENTS
‘TT—’ will appear in the upper right corner of the screen.
Other status information will also be displayed.
Other status information will also be displayed.
3.
Press ‘MENU’ on the remote commander to obtain the
following menu on the screen.
following menu on the screen.
4.
Move to the corresponding adjustment item using the
up or down arrow buttons on the Remote Commander.
up or down arrow buttons on the Remote Commander.
5.
Press the right arrow button to enter into the required menu
item.
item.
6.
Press the ‘Menu’ button on the Remote Commander to quit
the Service Mode when all adjustments have been completed.
the Service Mode when all adjustments have been completed.
Note :
•
After carrying out the service adjustments, to prevent the
customer accessing the ‘Service Menu’ switch the TV set
OFF and then ON.
customer accessing the ‘Service Menu’ switch the TV set
OFF and then ON.
i+
5
+
(ON SCREEN (DIGIT 5) (VOLUME +) (TV)
DISPLAY)
DISPLAY)
How to enter into the Service Mode
1.
Turn on the main power switch and enter into the stand-by
mode.
mode.
2.
Press the following sequence of buttons on the Remote
Commander.
Commander.
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- 22 -
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1.
Input a video signal that contains a small 100% white area on a
black background.
black background.
2.
Connect an digital voltmeter to Pin 10 of J7375 [C Board].
3.
Set the TV set or operation in Service Mode.
[ See Page 21 ].
[ See Page 21 ].
4.
Select ‘Service’ from the on screen menu display and press
‘Right Arrow’.
‘Right Arrow’.
5.
The ‘Service’ menu will appear on the screen.
6.
Adjust the Sub-Contrast to obtain a voltage of 105 +/- 5V.
Sub Colour Adjustment
1.
Receive a PAL colour bar signal.
2.
Connect an oscilloscope to Pin 6 of CN7001 [A Board].
3.
Set the TV set or operation in Service Mode.
[ See Page 21 ].
[ See Page 21 ].
4.
Select ‘Service’ from the on screen menu display and press
‘Right Arrow’.
‘Right Arrow’.
5.
The ‘Service’ menu will appear on the screen.
6.
Adjust the ‘Sub Colour’ sothat the Cyan, Magenta and Blue
colour bars are of equal levels as indicated below.
colour bars are of equal levels as indicated below.
Same Level
B-Out Waveform
1.
Input a Monoscope pattern.
2.
Set the TV set or operation in Service Mode.
[ See Page 21 ].
[ See Page 21 ].
3.
Select ‘Service’ from the on screen menu display and press
‘Right Arrow’.
‘Right Arrow’.
4.
The ‘Service’ menu will appear on the screen.
5.
Adjust the ‘Sub-Brightness’ data so that there is barely a
difference between the 0 IRE and 10 IRE signal levels.
difference between the 0 IRE and 10 IRE signal levels.
Sub Contrast Adjustment
Sub Brightness Adjustment
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D
1.
Set the TV set or operation in Service Mode.
[ See Page 21 ].
[ See Page 21 ].
2.
Select ‘Geometry’ from the on screen menu display and press
‘Right Arrow’.
‘Right Arrow’.
3.
The ‘Geometry’ menu will appear on the screen.[See Page 21]
4.
Select and adjust each item in order to obtain the optimum image.
Deflection System Adjustment
V SIZE
V LIN
AFC BOW
V POSITION
H POSITION
H SIZE
PIN AMP
TRAPEZIUM
UP CORNER PIN
AFC ANGLE
LO CORNER PIN
Test Mode 2 is available by setting the TV for operation in Service
Mode [ As shown on Page 21 ] , OSD ‘TT’ appears. The functions
described below are available by selecting the two numbers. To
release the ‘Test mode 2’, press 00, 10, 20 ... twice or switch the TV
set into Stand-by mode. In ‘TT Menu’ mode, it is possible to remove
the Menu from the screen by pressing the Speaker Off button once.
Pressing the Speaker OFF button a second time will cause the Menu
to reappear. The function is kept even when the menu is not displayed
on screen !!.
Mode [ As shown on Page 21 ] , OSD ‘TT’ appears. The functions
described below are available by selecting the two numbers. To
release the ‘Test mode 2’, press 00, 10, 20 ... twice or switch the TV
set into Stand-by mode. In ‘TT Menu’ mode, it is possible to remove
the Menu from the screen by pressing the Speaker Off button once.
Pressing the Speaker OFF button a second time will cause the Menu
to reappear. The function is kept even when the menu is not displayed
on screen !!.
4-2. TEST MODE 2:
- 24 -
5-1. BLOCK DIAGRAMS (1)
Y IN 100
BLK 100
H SYNC
V SYNC
RED IN 1
GREEN IN 1
BLUE IN 1
RED IN 2
VIDEO RF
V IN 1
BLK 1
BLK 2
GREEN IN 2
BLUE IN 2
100Hz BUFFER
Y SCAN RATE
BACKEND
Q3300
CN0101
SCAN RATE CONVERTER,
COLOUR DECODER AND
I/O VIDEO SWITCH
IC3200
A 2/2 ( )
VIDEO AND AUDIO PROCESSORS,
AUDIO OUTPUT, VERTICAL DEFLECTION
2
AY OUT 100
8
NC
H OUT 100
23
V OUT 100
39
40
41
R IN 1
46
G IN 1
47
B IN 1
48
R IN 2
52
CVBS 1
CVBS 2
5
AGC
17
FBL 1
38
FBL 2
37
G IN 2
B IN 2
79
76
70
69
63
62
58
57
56
55
54
TO G BOARD
CN6008
AU OUT 100
AY OUT 100
X IN
CVBS OUT 2
CVBS 7
CVBS 6
CVBS 3
X OUT
CVBS OUT 1
CVBS 5
CVBS 4
53
C FRONT
Y/CVBS FRONT
V IN 2
C IN 3
100Hz BUFFER
U SCAN RATE
BACKEND
Q3302
4
CS
3
SDA
2
SCL
KEY
TXT VIDEO
V SYNC
H SYNC
LINE MUTE
MODE 2
AV LINK
MODE 1
FS 100
AUDIO MUTE
R TEXT
RESET AUDIO
G TEXT
B TEXT
DGC RY
MAIN RY
COINCIDENCE
OCP
GROUP DELAY
OVP
MODE 3
AGC
SIRCS
LED
SDA
SCL
PART OF
OVERVOLTAGE
PROTECTION
Q5815, Q5816
Q5815, Q5816
AMP Q1006
AND
COINCIDENCE
DETECTOR
Q1005
VIDEO RF
CVBS TXT
V SYNC
H SYNC
12 C ADAPTOR
5V - 3.3V
Q3500
OVP
+3.3V
2
1
CN6200
TO M BOARD
CN0001
SERVICE
CONNECTOR
TO A BOARD
SHEET 1
6dB AMPLIFIER
FOR THE
SELECTABLE
OUTPUT CVBS
(3RD SCART)
Q3200
6dB AMPLIFIER
FOR THE
SELECTABLE
OUTPUT CVBS
(3RD SCART)
Q3202
100Hz BUFFER
U SCAN RATE
BACKEND
Q3301
6dB AMPLIFIER
FOR THE MONITOR
OUTPUT CVBS
(2ND SCART)
Q3204
V OUT 3
6dB AMPLIFIER
FOR THE MONITOR
OUTPUT CVBS
(2ND SCART)
Q3201
V OUT 2
V IN 100
U IN 100
39
21
16
17
37
34
5
35
12
36
18
22
19
20
14
13
15
23
11
25
6
40
10
24
9
8
A
B
12 C ADAPTOR
5V - 3.3V
Q3501
CN0102
V/Y IN 3
X3200
D5809
DGC RY
MAIN RY
PICTURE TUBE
CN7301
R-
TO D BOARD
HV (T8800)
R
G
B
HV
IC7350
VIDEO OUT (BLUE)
IC7325
VIDEO OUT (GREEN)
8
VOC
IC7300
VIDEO OUT (RED)
8
9
10
13
5
HEATER
RV7375
CN7300
TO D BOARD
CN8614
J7375
R, G, B OUT
3
VIN
1
2
3
4
5
6
G-
B-
TO A BOARD
CN7001
8
VOC
3
VIN
8
VOC
1
VIN
SWITCH
Q7353
5
1
5
1
5
3
5
SWITCH
Q7350
Q7354
Q7354
SWITCH
Q7352
SWITCH
Q7355
+12V
B+
G+
R+
9
1K
C ( )
2
4
SWITCH
Q1100
STBY 5V
TO A BOARD
CN0103
CN1101
LED
SWITCH
Q1101
OUT
IC6400
SIRCS REGULATOR
G
R
1
5
S6100
CN6102
CN6100
2
1
F5 ( )
AC IN, SIRCS, LED
TO G BOARD
CN6001
D6401
VCC
1
SIRCS
AC IN
AC IN
AC OUT
AC OUT
FH001
AC IN
TO A BOARD
CN2502
HEADPHONES
WOOFER MUTE
CN4502
R OUT
R IN
L OUT
CN4501
1
3
2
6
J4501
J4500
H6 ( )
FRONT AV INPUT,
HEADPHONE AND
HEADPHONE AND
CONTROL SWITCHES
5
R
9
L
Y/CVBS
KEY
6
4
1
TO A BOARD
CN2000
L IN
V
L
R
3
1
2
4
2
CHROMA
SWITCH
S4502
SWITCH
S4501
SWITCH
S4500
RIGHT OUT
CN2501
IC2000
AUDIO PROCESSOR
A 1/2 ( )
VIDEO AND AUDIO PROCESSORS,
AUDIO OUTPUT, VERTICAL DEFLECTION
67 IF INI
SCL
3
SDA
37
56
SC1 OUT L
SC1 IN L
2
SC1 OUT R
57
SC1 IN R
36
27
28
30
TO
SPEAKERS
SPEAKER OUT R
SPEAKER OUT L
SUBWOOFER OUT
R
1
4
CN1000
TO A
BOARD
SHEET 2
71
72
RIGHT IN
LEFT OUT
LEFT IN
BLUE IN 1
GREEN IN 1
RED IN 1
VIDEO OUT 1
VIDEO IN 1
RIGHT OUT
34
53
SC2 OUT L
SC2 IN L
SC2 OUT R
54 SC2 IN R
33
1
3
2
6
11
7
15
20
19
RIGHT IN
LEFT OUT
LEFT IN
BLUE IN 2
GREEN IN 2
RED IN 2
VIDEO OUT 2
VIDEO IN 2
CN1001 (1/2)
XTAL IN
XTAL OUT
TU1001
SDA
QSS
SCL
SDA
RIGHT OUT
50
SC3 IN L
51 SC3 IN R
1
3
2
6
19
20
RIGHT IN
LEFT OUT
LEFT IN
VIDEO OUT 2
V/Y IN 3
CN1001 (2/2)
KEY
47
48
1
6
4
9
LEFT
Y/CVBS FRONT
C FRONT
CN2000
FR IN L
FR IN R
LED
2
1
CN0103
IC7002
BACKEND: DEFLECTION - RGB PROCESSOR
33
YSYM 2
34
B2 IN
G2 IN
36
R2 IN
35
30
26
R OUT
B OUT
FS 100
B TXT
G TXT
R TXT
52
Y1 IN
U IN 100
G OUT
53
CB1 IN
54
CR1 IN
HS IN
60
VS IN
59
V IN 100
H SYNC
V SYNC
PIP Y
56
Y2 IN
PIP CB
57
CB2 IN
PIP CR
58
CR2 IN
64
DF PARA
63
EXTRA PARA
1
EW OUT
17
HD OUT
18
HP IN
20
X RAY IN
5
6
16
45
VM OUT
IC2500
AUDIO AMPLIFIER
5
IN R
1
IN L
IN W
9
MUTE W
6
12
3
OUT R
OUT W
RIGHT
LEFT
WOOFER
10
MUTE
14
OUT L
DF PARA
MP PARA
E/W
H DRIVE
AFC PULSE
X RAY
IC5400
V OUT
1
7
IC5103
DAC
3
7
DF PHOCUS
PHASE
PHASE
M PIN CONT
IC5104
OP. AMP
2
4
ROT -
ROT+
5
7
6
IC5301
OP. AMP
5
6
IC5302
COMPARATOR
1
VM
1
AFC PULSE
X RAY
6
5
3
2
H DRIVE
E/W
MP PARA
DF PARA
1
6
B-
B+
5
4
3
2
G+
G-
R+
R-
1
3
1
WOOFER
2
6
R OUT
L OUT
5
L IN
3
R IN
CN2502
TO SUBWOOFER
TO H6 BOARD
CN4502
CN2500
CN5100
TO
ROTATION
COIL
CN5002
TO D BOARD
CN8810
CN7001
TO C BOARD
CN7301
TO D BOARD
CN8620
TO VM BOARD
CN7442
R OUT
L OUT
J2000
L
CN7000
CN5801
TO F5 BOARD
CN1101
TO H6 BOARD
CN4501
Y IN 100
8
10
WOOFER MUTE
WOOFER MUTE
1
IC5300
DEFLECTION
CONTROL CCT
QP(-)
QP(+)
6
8
+12V
4
5
PROTECTOR
PS2501
6
5
AU(+)
AU(+)
CN6202
TO G BOARD
CN6006
AUDIO VCC
GND
MODE 1
BLANKING
SIRCS
A
B
IC2001
HEADPHONE AMPLIFIER
3
5
1
7
SPEAKERS
X2000
55
15
PIP BLK
X5800
FS
500K
28
3
6
7
1
2
4
3
H LIN
4
BUFFERS
&
SWITCH
Q5301,
Q5302,
Q5302,
Q5304 TO
Q5306
DEFLECTION CONTROL
V PROTECT
CCT
Q5400 TO Q5403
Q5813, D5401
DF DRIVE
M PIN CONT
H CENTRE
H LIN
BLK1
SCART
DUAL SCART
2
RIGHT
IC5102
DEFLECTION
CONTROL CIRCUIT
5
1
8
5
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