11
SX51LF7
SX51LF8
11-1
11-2
FOCUS ADJUSTMENT
No.
Adjusting point
Adjusting procedure/conditions
W
aveform and others
Focus
1.
Receive the “Monoscope Pattern” signal.
2.
Press R/C to set Picture NORMAL condition.
3.
Adjust the focus control to get the best focusing.
1
P
A
L
CHROMA
ADJUSTMENT
No.
Adjusting point
Adjusting procedure/conditions
W
aveform and others
SUB COLOUR
(I2C BUS
CONTROL)
1.
Receive the “P
AL
Color Bar” signal.
2.
Press R/C to set Picture Normal condition.
3.
Connect the oscilloscope to Red cathode.
Range :
20 V/Div (AC)
(Using 10:1 Probe)
Sweep
T
ime :
10 µ
sec/Div
4
.
Using the R/C call “SUB-COL” in SER
VICE mode.
Adjust SUB COLOUR bus data, so that the 75%
White & Red portions of P
A
L
Color Bar be at the
same level shown as Fig 10.
5.
Clear the SER
VICE mode.
*
Before
Adjust SUB-COL, COL-0P=8, COL-03=4,
COL-04=4.
After
Adjust SUB-COL, set COL-0P=14, COL-
03=10, COL-04=10
1
Fig. 10
Cy G
B
W
Y
100%
W Mg R
75%
No.
Adjusting point
Adjusting procedure/conditions
W
aveform and others
SUB-TINT (I2C
BUS CON-
TROL)
1
.
Receive the "NTSC3.58 Colour Bar" signal
through A
V
in.
2.
Connect the oscilloscope to
TP853 (Pin (5) of
P882) BLUE-OUT
.
»
Range
: 100mV/Div
. (AC)(Use Probe 10:1)
»
Sweep time
: 10 µsec/Div
.
3.
Call the "SUB-TINT" mode in service mode.
Ad-
just the "SUB-TINT" bus data to obtain the wave-
form shown as Fig. 1
1
.
4.
Clear the SER
VICE mode.
1
Fig. 1
1
NTSC CHROMA
ADJUSTMENT
No.
Adjusting point
Adjusting procedure/conditions
W
aveform and others
BEAM PRO-
TECT
OR
1.
Receive "Monoscope Pattern" signal.
2.
Set CONTRAST MAX.
3.
Set BRIGHT MAX.
4.
During the Collector & Emitter of Q883/5/7 short,
make sure the protector ON and switch to standby
mode.
1
* Select one of Q883/5/7 to do
each short test.
H, V PROTEC-
TO
R
1.
Receive "Monoscope Pattern" signal.
2
.
Connect output of Bias Box to D607 cathode
(R606 side).
3.
Set voltage of Bias Box to 18V and make sure
the protector is not work.
4.
Set voltage of Bias Box to 27V
, and make sure
the protector is work.
2
OTHER PRO-
TECT
OR
1.
Once finish rectified Electrolytic Capacitor short
testing in +B line, check all possible damaged
components on +B line.
(Use random selected set for inspection)
3
PROTECT
OR OPERA
TION CHECKING
No.
Adjusting point
Adjusting procedure/conditions
W
aveform and others
VIDEO AND
AUDIO
OUTPUT
CHECK
1.
Receive the "P
AL
Color Bar" signal (100% White
Color Bar
, Sound 400 Hz 100% Mod.)
2.
T
erminate the V
ideo output with a 75 ohm imped-
ance.
Make sure the output is as specified (1.0
Vp-p ±3 dB).
3.
T
erminate the
Audio output with a 10k ohm im-
pedance.
Make sure the output is as specified
(1.76 Vp-p ±3 dB).
1
VIDEO AND
AUDIO INPUT
CHECK
1.
Using the
TV/A
V key on the remote controller
,
make sure that the modes change in order of
TV
,
A
V1,
A
V2 &
TV again and the video & audio out-
put are according to the input terminal for each
mode.
2
A/V INPUT
AND OUTPUT CHECKING
SAME LEVEL
W
Y
Cy
G
Mg
R B
Содержание SX51LF7
Страница 31: ...31 SX51LF7 SX51LF8 1 2 3 4 5 6 7 8 9 10 A B C D E F G H I J CHASSIS LAYOUT ...
Страница 38: ...42 SX51LF7 SX51LF8 1 2 3 4 5 6 7 8 9 10 A B C D E F G H I J SCHEMATIC DIAGRAM MODEL SX51LF7 CRT Unit ...
Страница 39: ...43 SX51LF7 SX51LF8 1 2 3 4 5 6 7 8 9 10 A B C D E F G H I J SCHEMATIC DIAGRAM MODEL SX51LF8 CRT Unit ...
Страница 43: ...50 SX51LF7 SX51LF8 1 2 3 4 5 6 7 8 9 10 A B C D E F G H I J BLOCK DIAGRAM 2 3 CRT IGR BLOCK SX51LF7 ...
Страница 44: ...51 SX51LF7 SX51LF8 1 2 3 4 5 6 7 8 9 10 A B C D E F G H I J BLOCK DIAGRAM 3 3 NICAM IGR BLOCK SX51LF8 ...
