Sharp 14U10 User Manual

14U10/15
14U20/25
9
9-1
9-2
A/V INPUT AND OUTPUT CHECKING
(Continued)
No.
Adjusment point
Conditions/Adjusting procedure Waveform or others
SUBWOOFER
OUTPUT
CHECK
1. Receive "PAL Colour Bar" signal (Sound 400Hz,
100% Mod.)
2. Set the sound output to 2.83 Vrms by volume key.
3. Terminal the "Sub-Woofer" output with a 22 kilo-
ohms impedance.
Make sure that output is 4.0Vp-p ±3 dB.
3
FUNCTION OPERATION CHECKING (VIDEO AND AUDIO)
No.
Adjusment point
Conditions/Adjusting procedure Waveform or others
CONTRAST
key
1. Receive "Monoscope Pattern" signal.
2. Set P-Mode to select CONTRAST.
3. Press Volume Up/Down key to check whether the
CONTRAST effect is OK or not.
1
1. Receive "Color Bar" signal.
2. Set P-Mode to select COLOUR.
3. Press Volume Up/Down key to check whether
the COLOUR effect is OK or not.
2
COLOUR key
BRIGHTNESS
key
1. Receive "Monoscope Pattern" signal.
2. Set P-Mode to select BRIGHTNESS.
3. Press Volume Up/Down key to check whether
the BRIGHTNESS effect is OK or not.
3
TINT key 1. Receive the "NTSC Colour Bar" signal thru AV in.
2. Set P-Mode to select TINT.
3. Press Volume Up/Down key to check TINT, UP
for GREEN direction and DOWN for PURPLE di-
rection whether is OK or not.
4
SHARPNESS
Key
1. Receive "Monoscope Pattern" signal.
2. Set P-mode to select SHARPNESS.
3. Press Volume Up/Down key to check whether the
SHARPNESS effect is OK or not.
5
CH DISPLAY
COLOUR
1. All Ch (1~99) will have an OSD display of the
channel number in green colour under AFT ON
condition.
6
NORMAL Key7
1. Once in PICTURE Mode, and the NORMAL key
is pressed, all the settings will be present to nor-
mal setting.
(Normal setting value for every mode).
» CONTRAST : MAX
» COLOUR : CENTER
» BRIGHTNESS : CENTER
» TINT : CENTER
» SHARPNESS : CENTER
No.
Adjusment point
Conditions/Adjusting procedure Waveform or others
SUB-TINT (I
2
C
BUS CON-
TROL)
1. Receive the "NTSC3.58 Colour Bar" signal
through AV in.
2. Connect the oscilloscope to TP853 (P882 PIN5)
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 SERVICE mode.
1
Fig. 1-1
NTSC CHROMA ADJUSTMENT
No.
Adjusment point
Conditions/Adjusting procedure Waveform or others
BEAM PRO-
TECTOR
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-
TOR
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
PROTECTOR
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
PROTECTOR OPERATION CHECKING
No.
Adjusment point
Conditions/Adjusting procedure Waveform or others
VIDEO AND
AUDIO
OUTPUT
CHECK
1. Receive the "PAL Color Bar" signal (100% White
Color Bar, Sound 400 Hz 100% Mod C475)
2. Terminate the Video output with a 75 ohm imped-
ance. Make sure the output is as specified (1.0
Vp-p ±3 dB).
3. Terminate the Audio output with a 10k ohm im-
pedance. Make sure the O/P is as specified
(1.76 Vp-p ±3 dB).
1
VIDEO AND
AUDIO INPUT
CHECK
1. Using the TV/AV key on the remote controller,
make sure that the modes change in order of TV,
AV1, AV2 & TV again and the video & audio out-
put are according to the input terminal for each
mode.
2
A/V INPUT AND OUTPUT CHECKING
W
Y
Cy G Mg R
B
(SAME LEVEL)

Sharp 14U10 Specifications

General

Brand	Sharp
Model	14U10
Category	TV
Language	English