Sony KV-28EW20B, Service Manual

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Sub Brightness Adjustment
1. Input a Monoscope pattern.
2. Press ‘TEST’ ‘TEST’ 13 on the Remote Commander.
3. Adjust the ‘Sub-Brightness’ data so that there is barely a
difference between the 0 IRE and 10 IRE signal levels.
1. Input a video signal that contains a small 100% white area on a
black background.
2. Connect an digital voltmeter to Pin 10 of J701 [C Board].
3. Adjust the Sub-Contrast [‘TT11’] to obtain a voltage of
105 +/- 5V.
Sub Contrast Adjustment
4-1. Electrical Adjustments
Service adjustments to this model can be performed using the
supplied remote Commander RM-887.
‘TT—’ will appear in the upper right corner of the screen.
Other status information will also be displayed.
3. Press ‘MENU’ on the remote commander to obtain the following
menu on the screen.
4. Move to the corresponding adjustment item using the
up or down arrow buttons on the Remote Commander.
5. Press the right arrow button to enter into the required menu item.
6. Press the ‘Menu’ button on the Remote Commander to quit the
Service Mode when all adjustments have been completed.
Note :
•
Before performing any adjustments ensure that the correct model
has been selected in the ‘Model Setting’ menu.
• After carrying out the service adjustments, to prevent the
customer
accessing the ‘Service Menu’ switch the TV set OFF
and then ON.
i+ 5
+
(ON SCREEN (DIGIT 5) () (TV)
DISPLAY)
SECTION 4
CIRCUIT ADJUSTMENTS
How to enter into the Service Mode
T S U J D A F I
t s u j d A C G A
e t u m o t u A
n i a G o i d u A
g n i t a G L
) 5 1 + , 6 1 - ( 0 +
1
0
0
1. Turn on the main power switch and enter into the stand-by mode.
2. Press the following sequence of buttons on the Remote
Commander.
U N E M R O R R E
2 0 E
3 0 E
4 0 E
5 0 E
6 0 E
7 0 E
8 0 E
9 0 E
0 1 E
1 1 E
E M I T G N I K R O W
S R U O H
S E T U N I M
P C O
A / N P V O
C N Y S V
R K I
C I I
M V N
E L G N U J
R E N U T
P D N U O S
V 8
) 5 5 2 , 0 (
) 5 5 2 , 0 (
) 5 5 2 , 0 (
) 5 5 2 , 0 (
) 5 5 2 , 0 (
) 5 5 2 , 0 (
) 5 5 2 , 0 (
) 5 5 2 , 0 (
) 5 5 2 , 0 (
) 5 5 2 , 0 (
0
0
0
0
0
0
0
0
0
0
2
1 1
y r t e m o e G
e c i v r e S
n g i s e D
s u t a t S
d n u o S
t s u j d a F I
u n e M r o r r E
4 4 . 3 v o e r e t S 2 - E F
h 3 9 h 2 0 a t a d y r o t c a F
G 1 1 4 3 P S M : e c i v e D P S M
E C I V R E S
R - t e s f f O
G - t e s f f O
e v i r D - R
e v i r D - G
e v i r D - B
q e r F - k a e P
y a l e D - a m u L
0 C S
k a e P - e t i h W
t n o c b u S
t h g i r b u S
l o c b u S
p r a h s b u S
. r B f f o t u C
D S O r B
T X T r B
) 3 6 , 0 (
) 3 6 , 0 (
) 3 6 , 0 (
) 3 6 , 0 (
) 3 6 , 0 (
) 3 , 0 (
) 5 1 , 0 (
) 3 , 0 (
) 5 1 , 0 (
) 5 1 , 0 (
) 3 6 , 0 (
) 3 6 , 0 (
) 3 6 , 0 (
) 3 6 , 0 (
) 5 1 , 0 (
) 5 1 , 0 (
j d A
j d A
1 3
j d A
j d A
0
8
3
5 1
8
0 3
j d A
5 2
1 3
0 1
7
Y R T E M O E G
y t i r a e n i L - V
ll o r c S - V
k l B H - t f e L
k l B H - t h g i R
e l g n A - V
w o B - V
e r t n e C - H
e z i S - H
p m A - n i P
n i P - r e n r o C - U
n i P - r e n r o C - L
e s a h P n i P
e p o l S - V
e z i S - V
n o i t c e r r o C - S
e r t n e C - V
m o o Z - V
a t n e g a M
) 3 6 , 0 (
) 3 6 , 0 (
) 5 1 , 0 (
) 5 1 , 0 (
) 3 6 , 0 (
) 3 6 , 0 (
) 3 6 , 0 (
) 3 6 , 0 (
) 3 6 , 0 (
) 3 6 , 0 (
) 3 6 , 0 (
) 3 6 , 0 (
) 3 6 , 0 (
) 3 6 , 0 (
) 3 6 , 0 (
) 3 6 , 0 (
) 3 6 , 0 (
) 3 6 , 0 (
j d A
2 3
0 1
7
j d A
j d A
j d A
j d A
j d A
j d A
j d A
j d A
0 4
j d A
j d A
j d A
7 2
1 3