Sharp XL-3000V service manual Key input diagnosis Test Mode Test

XL-3000V

6. Key input diagnosis Test Mode (TEST 6)

When the test mode is obtained, the following is displayed.

This test mode is intended to check whether all the main unit buttons can be detected. Accordingly, in this test mode, it is checked whether the "ON/STAND-BY" button was pressed after all the buttons shown below were pressed. If the result is OK, OK is displayed. If any one of keys was not pressed, an error is displayed. In both cases of OK termination or error termination, the mode is shifted to the standby mode if the "ON/STAND-BY" button is pressed subsequently.

All models using this type of microcomputer are not always provided with the same buttons. Since the buttons used are different depending on models, types of buttons to be used are determined by whether RDS, SURROUND, and an electric lid are available at the initial setting by MODEL port.

The order of buttons to be pressed is not determined. Accordingly, it is checked whether all buttons have been pressed.

1.PU-IN buttons: REW/PRESET DOWN + CD STOP Since this model is provided with SURROUND (HAVE OR NOT), RDS (HAVE OR NOT), and electric CD lid, the following 10 buttons are detected as all buttons.

PLAY, BASS/TREBLE, FUNCTION, VOLUME UP/

DOWN, MEMORY/SET, REW, FF, STOP, CD-OPEN/

CLOSE

The OK/NG display of test result is as follows.

7.Electric CD lid Aging Test Mode (TEST 8) (Only for model with electric CD lid)

Outline

OPEN/CLOSE operations of electric CD lid are repeated. The number of repeated times and time period are monitored. If the lid does not move to the regular position after the specified time, operation is stopped. When an error is detected by [CLID_PRO] during CLOSE, operation is also stopped.

a. POWER ON for function AUX

CD lid position is checked.

CLOSE position: Operation proceeds to the next process.

Position other than CLOSE: After the lid moves to CLOSE,operation proceeds to the next process.

b.CD lid operation started OPEN operation

WAIT 1 second CLOSE operation WAIT 1 second

c.Operations above are repeated. Specified monitoring time

OPEN operation: 5 seconds

CLOSE operation: 5 seconds

d.Display

OPEN>CLOSE is counted as 1. I to 59999 are counted; if the count is over 59999, display is returned to 0 to repeat counting.

Display when the lid does not move to the regular position after the specified time

(Ex: Defective operation occurring in the middle of 1538.)

Highlight display of stop when an error is detected by [CLID-PRO]

(Ex: Defective operation occurring in the middle of 1538.)

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