Sharp 21V-FS700S, Service Manual

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21V-FS700S
3 – 20
7. PROTECTOR OPERATION CHECKING
8. A/V INPUT & OUTPUT CHECKING
NO ADJUSTMENT POINT WAVEFORM OR OTHERS
1 H, V PROTECTOR
ADJUSTMENT CONDITION / PROCEDURE
(1) Receive "Monoscope Pattern" signal.
(2) Connect output of Bias Box to
D602
cathode
(C602 positive).
(3) Set voltage of Bias Box to
18V
and make sure
the protector is not working.
(4) Set voltage of Bias Box to
28.5V
. The tv will
four times in "ON" and "OFF"condition before
the protector ON and switch to standby mode.
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)
NO ADJUSTMENT POINT WAVEFORM OR OTHERS
1 VIDEO AND AUDIO
OUTPUT CHECK
ADJUSTMENT CONDITION / PROCEDURE
(1) Receive the "US 10 CH HALF Color Bar" signal.
(2) Terminate the Video output with a 75 ohm
impedance. (At signal is standard Color Bar
Y/C=1/1, 87.5% Mod.)
Make sure the output is as specified
(1.0 Vp-p ± 3 dB).
(3) Terminate the Audio output with a 47K ohm
impedance. (400 Hz 100% Mod. 47kW,
VOL Max.)
Make sure the O/ P is as specifie d
(1.2 Vp-p ± 3 dB).
2
VIDEO AND AUDIO
INPUT CHECK
(1) Using the INPUT key on the remote
controller, make sure that the modes change
in order of TV,INPUT1, INPUT2 & TV again and
the video & audio output are according to the
input terminal for each mode.
(2) Video cross-talk INPUT to TV checking: :
a) When connect INPUT1 input, check TV also
b) When connect INPUT2 input, check TV also
Caution:
INPUT1 share with YUV. Therefore,
if YUV signal is connected to
Component In terminal, only
component is will detected.
3 COMPONENT IN
CHECK
(1) Connect YUV & Audio signal to Component
In terminal and Audio terminal.
(2) Using the INPUT key on the remote
controller, press it until the modes change to
COMPONENT, confirm output is appear.
(3) Audio source is share with INPUT1