Sharp LC-20B4U-B, Service Manual

Page: 13 / 100

13
LC-20B4U-S
LC-20B4U-B
ADJUSTING PROCEDURE OF EACH SECTION
The best adjustment is made before shipping. If any position deviation is found or after part replace is performed, adjust
as follows.
1. Preparation for Adjustments
Use the exclusive-use AC adapter or stable DC power supply.
AC adapter: UADP-0243CEPZ
DC power supply: 13 ± 0.5V
2. Special mode setting procedure
(1)After initialization of E 2 PROM the mode is changed to the adjustment mode.
[Procedure]
Connect TP2001 and TP2002 to GND, and turn on the power.
[Description]
»
The initialization of microprocessor is as follows.
»
AV position, DAC data, G/A data, sound processor data, and video chroma data adjustment values are taken
as defaults.
(2)Adjustment mode
[Procedure]
Short-circuit TP2001 to GND, and turn on the power.
Or short-circuit TP2002 to GND, and turn on the power.
Or holding down the "TV/VIDEO" key and "MENU" key, turn on the main power, and simultaneously press the
(inspection process) "CH (
Ù
)" key and "VOL (–)" key to change the mode to the adjustment mode.
[Description]
The manual adjustment or adjustment through communication with the automatic machine is performed.
(3)Shipping setting mode
[Procedure]
Holding down the "TV/VIDEO" key and "MENU" key, turn on the main power, and simultaneously press the
(inspection process) "CH (
ù
)" key and "VOL (+)" key to change the mode to the shipping setting mode.
Note: Keep it in mind to turn off the power immediately. If any key-in is accidentally made, the setting will be
canceled.
[Description]
User adjustment and other values are taken as defaults.
If TV is indicated as SETTING COMPLETE, setting has been completed.
3. Cancel of special mode
Turn off the main unit power.