Sharp CX68KF5 Service Manual page 15

FUNCTION OPERATION CHECKING (1) (VIDEO & AUDIO)
No. Adjustment point Adjustment Condition / Procedure
1 CONTRAST 1. Receive the Monoscope Pattern signal.
Key 2. Press to Menu mode, then select Picture Mode
and set to select CONTRAST.
3. Press Volume Up/Down key to check whether
the CONTRAST effect is OK or not.
2 COLOUR Key 1. Receive the Colour Bar signal.
2. Press to Menu mode, then select Picture Mode
and set to select COLOUR.
3. Press Volume Up/Down key to check whether
the COLOUR effect is OK or not.
3 BRIGHTNESS 1. Receive the Monoscope Pattern signal.
Key 2. Press to Menu mode, then select Picture Mode
and set to select BRIGHTNESS.
3. Press Volume Up/Down key to check whether
the BRIGHTNESS effect is OK or not.
4 TINT Key 1. Receive the NTSC Colour Bar signal thru AV
input.
2. Press to Menu mode, then select Picture Mode
and set to select TINT.
3. Press Volume Up/Down key to check TINT, UP
for GREEN direction and DOWN for RED
direction whether is OK or not.
5 SHARPNESS 1. Receive the Monoscope Pattern signal.
Key 2. Press to Menu mode, then select Picture Mode
and set to select SHARPNESS.
3. Press Volume Up/Down key to check whether
the SHARPNESS effect is OK or not.
6 NORMAL Key 1. Once in PICTURE Mode, and the NORMAL
key is pressed, all the settings will be present
to normal setting.
(Normal setting value for every mode, refer on
page 8.)
7 WHITE TEMP 1. Receive the Monoscope Pattern signal.
2. Set FUNCTION to select WHITE TEMP.
3. Press Volume Up/Down key to check WHITE
TEMP Option, STANDARD: NORMAL
SETTING, WARM for more REDDISH
direction changing, COOL for more BLUISH
direction changing.
Waveform or others
Note:
If nothing is display mean contrast,
colour, brightness, tint, sharpness
are all in normal setting.
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FUNCTION OPERATION CHECKING (2) (VIDEO & AUDIO)
No. Adjustment point Adjustment Condition / Procedure
8 HEADPHONE 1. Receive the PAL Colour Bar signal with sound
OUTPUT 400 Hz, 100% modulation (± 50kHz Dev)
CHECKING 2. Maximum volume, and check the headphone
output with 400 Hz sound and no sound out
from speaker.
(Ref: Output Level of Headphone is as Following:)
SUB-VOL Adj.
63
40
PROTECTOR OPERATION CHECK
No. Checking Item Adjustment Condition / Procedure
1 H.V Protector 1. Receive the Monoscope pattern signal.
2. Connect the bias box to the cathode side
(R1662 side) of D1621.
3. Set the voltage of the bias box at 15V, and
verify that the protector does not operate.
4. Set the voltage of the bias box at 24V, and
verify that the protector does operate.
2 Other Correspondence for short circiut of smoothening
protectors electrolysis of +B line and so on.
To check the operation of the protector and so
on, take care for the breakage, deterioration and
so on of each element.
Waveform or others
H/P Output (Open)
1.0 Vp-p
500 mVp-p
Waveform or others
Reference Approx. 17.7 V as
ordinary.
15-2