Adjustment Procedures - Sharp LC-37HV4M Service Manual

LC-37HV4M
LC-37HV4H
Though the best adjustment is made at shipment from the factory, the following adjustment is required if the value
should be deviated or some adjustment is needed after replacement of parts.
Display Side:
1. Preparation for Adjustment
The unit needs to be replaced when the AVC System CONFIGROM/IC2202, receiver IC2206 and HDCP key
ROM/IC2208 are replaced.
Applicable unit: DKEYHB453FE54 (LC-37HV4M)
DKEYHB453FE58 (LC-37HV4H)
2. Adjustment
Enter Adjustment Process mode. → VLSBIAS/15V voltage adjustment →
GRAY level/14.5V voltage adjustment → COMBIAS adjustment → Background adjustment
3. Entry to Adjustment Process mode
(1) For no connection of AVC System:
With the display main power off, while pressing the buttons of "INPUT" and "VOL (–)" on the display body
top together, turn on the Display MAIN POWER. Then, starting is done at DISPLAY process mode.
(2) For connection of AVC System:
With the display main power off, while pressing the buttons of "CH (Ù)" and "VOL (+)" High on the display
top together, turn on the Display MAIN POWER. Then, starting is done at DISPLAY process mode.
In both cases of the above (1) & (2), K is displayed on the screen upper left. Then, when some key is
pressed, the first page of DISPLAY ADJUST mode will start.
~ If MAIN POWER is off, the adjustment process mode is released.
4. Key Operation List at Adjustment Process mode
Key Function 1 (At page left end)
One item shift to up, Shift to previous
Cursor up
page (At top)
One item shift to down, Shift to next
Cursor down
page (At bottom)
One item shift to right, Page shift (At
Cursor right
initial page)
One item shift to left, Page shift (At
Cursor left
initial page)
ENTER test pattern
INPUT Shift to next page
One item shift to up, Shift to previous
CH_UP
page (At top)
One item shift to down, Shift to next
CH_DOWN
page (At bottom)
One item shift to right, Page shift/At
VOL_UP
initial page
One item shift to left, Page shift (At
VOL_DOWN
initial page)

ADJUSTMENT PROCEDURES

Function 2 (At value variable)
Adjust value one increase or execution (At
W&R items)
Adjust value one decrease or execution (At
W&R items)
One item shift to right
One item shift to left
Item execution (At W&R items)
Shift to next page
Adjust value one increase or execution (At
W&R items)
Adjust value one decrease or execution (At
W&R items)
One item shift to right
One item shift to left
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