Service manual

18
LC-37HV4U
LC-37HV4D
ADJUSTMENT PROCEDURES
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: DKEYHB453FE53 (LC-37HV4U)
DKEYHB453FE56 (LC-37HV4D)
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 "INPUT" and "VOL(–)" keys 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 "CH (Down)" and "VOL(+)" keys 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
Cursor up
Cursor down
Cursor right
Cursor left
ENTER
INPUT
CH_UP
CH_DOWN
VOL_UP
VOL_DOWN
Function 1 (At page left end)
One item shift to up, Shift to previous
page (At top)
One item shift to down, Shift to next
page (At bottom)
One item shift to right, Page shift (At
initial page)
One item shift to left, Page shift (At
initial page)
Test pattern off
Shift to next page
One item shift to up, Shift to previous
page (At top)
One item shift to down, Shift to next
page (At bottom)
One item shift to right, Page shift/At
initial page
One item shift to left, Page shift (At
initial page)
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