PROTECTOR PERFORMANCE CHECKFUNCTION OPERATION CHECKING (VIDEO AND AUDIO)
No. Adjusting pointAdjusting procedure/conditionsWaveform and othersNo. Adjusting pointAdjusting procedure/conditionsWaveform and others
1Beam1. Receive OMonoscope Pattern� signal.* Short-circuit any of the Q851,1CONTRAST1. Receive OMonoscope Pattern� signal.
protector2. Set the contrast control to maximum.Q852 and Q853.key2. Select the Contrast on the P-MODE screen.
3. Set the brightness control to maximum.3. Press Volume Up/Down key to check whether the
4. Make a short circuit between the collector andcontrast effect is OK or not.
emitter of Q851, Q852 or Q853 and make sure
that the protector is activated and the stand-by
mode is called.
2COLOUR key1. Receive OColour Bar� signal.
2High-voltage1. Receive OMonoscope Pattern� signal.2. Select the Colour on the P-MODE screen.
protector2. Connect output of Bias Box to D607 cathode
(R635 side).3. Press Volume Up/Down key to check whether the
colour effect is OK or not.
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.
3BRIGHTNESS1. Receive OMonoscope Pattern� signal.
key2. Select the Brightness on the P-MODE screen.
3Other1. Once finish rectified Electrolytic Capacitor short3. Press Volume Up/Down key to check whether the
protectorstesting in +B line, check all possible damaged
Brightness effect is OK or not.
components on +B line.
(Use random selected set for inspection)
4TINT key1. Receive the ONTSC Colour Bar� signal.
11
2. Select the Tint on the P-MODE screen.
3. Press Volume Up/Down key to check Tint, Up for
green direction and down for purple direction
whether is OK or not.
A/V INPUT AND OUTPUT CHECK
No. Adjusting pointAdjusting procedure/conditionsWaveform and others
5NORMAL key1. Once in PICTURE-Mode when the NORMAL kNote:eyInothing is displaf y mean
1Video and1. Receive the OPAL Colour Bar� signal (100% Whiteis pressed, all the settings will be present to nor-contrast, colour, bright, tint,
audio outputColour Bar, 400 Hz 100% modulation audio (?50mal setting.sharpness are all in normal
checkkHz Dev)(Normal setting value for every mode).setting.
2. Terminate the Video output with a 75 ohm imped-
ance. Makesure the output is as specified (1.0 E Contrast: MAX
Vp-p ?3 dB).E Colour: CENTER
3. Terminate the Audio output with a 10k ohm im-E Brightness: CENTER
E Tint: CENTER
pedance. Maksure the output is as specifiede
(1.76 Vp-p ?3 dB).E Sharpness: CENTER
E White Temp: CENTER
E Auto NR: AUTO (AV mode, NR off)
2Video and1. Using the TV/AV key on the remote controller,
audio inputmake sure that the modes change in the order of
checkTV, AV1, AV2 and TV again and that the video
and audio outputs are according to the input ter-
CX51TXZminal for each mode.
11-111-2 |
ACEC
SHARP
