Sharp 20R-S100S Service Manual - Page 6

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20R-S100S

For adjustments of this model, the bus data is converted to various analog signals by the D/A converter circuit.

Note: There are still a few analog adjustments in this series such as focus and master screen voltage. Follow

the steps below whenever the service adjusment is required.

To enter the service mode and exit service mode.

While pressing the Vol-up and Ch-up buttons at the sametime, plug the AC cord into a wall socket.

Now, the TV set is switched on and enters the service mode.

To exit the service mode, turn the television off by pressing the power button.

1. Service mode.

Before putting unit into the service mode, check that customer adjustments are in the normal mode. Use the reset

function in the video adjustment menu to ensure customer control are in their proper (reset) position.

2. Service number selection.

In the service mode, you will see the window screen as window 1. There are 4 adjustment categories 2DEF,

3SIGNAL, 4FEATURE, 5FIX VALUE as show in Figure A.

Window 2: DEF

D01

D03

D05

RETURN

Window 4: FEATURE

M01

M03

M05

RETURN

Press CH UP/DOWN button for selection and enter by VOL UP or VOL DOWN.

Press CH UP/DOWN button to select the adjustment item and VOL UP/DOWN

to adjust the data number for each categories.

(OSD disturbance can be erased by R/C display key)

(Note: EEPROM - factory used only)

D02

DEF

D04

D06

Window 1: ADJUSTMENT CATEGORIES

SERVICE MODE

DEF

SIGNAL

FEATURE

FIX VALUE

EEPROM

Window 5: FIX VALUE

M02

FEATURE

F01

M04

F13

RETURN

Figure A: ADJUSTMENT CATEGORIES

Window 3: SIGNAL

SIGNAL

FIX VALUE

F02

F14

S01

S02

S13

S14

RETURN

F15

F16

F25

F27

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