SD-SH111 (serv.man8). Adjustment - Sharp Audio Service Manual (repair manual). Page 7

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Outline:

This is to check that the system microcomputer properly acknowledges the key operations on the main unit.

Operation: In this test mode, the power is supplied only for the display, and all the FL indications are turned off as in the test

menu mode.
Then, the indication of 8 digits that corresponds to the key identified by the system microcomputer is displayed in
the FL.
When the power key is pressed, the whole FL is lit for 2 seconds before its power is turned off and the test mode
is canceled.

PLAY

KEY A1

STOP

KEY A2

FUNCTION

KEY A3

DGI/ANA/BAND

KEY A4

OPEN/CLOSE

KEY B1

SKIP DOWN

KEY B2

SKIP UP

KEY B3

VOLUME DOWN

KEY B4

VOLUME UP

KEY B4

Outline:

The DVD/CD lid is opened and closed repeatedly and the number of repetitions is displayed in the FL. If the finger
jam or time over is detected while the lid is opening or closing, the lid operations is stopped and the error

indication and the number of repetitions are displayed.

Keys available in this test mode are POWER, PLAY, STOP, and OPEN/CLOSE only.

Operation: 1. After entering the test mode, “TEST” is displayed at the top of the FL and “00000” at the bottom, and the unit waits

until the next key operation is performed.
If the DVD/CD lid is not closed, close it during this operation.

2. The test is commenced by pressing the OPEN/CLOSE key. The DVD/CD lid is controlled in the following

procedure

and the FL shows the number of open/close repetitions. The test operation is repeated until the STOP

or POWER

key is pressed or the error is detected.

a. Open the DVD/CD lid until the OPEN completion is detected.
b. When the OPEN completion is detected, stop the DVD/CD lid operation and wait for 2 seconds.
c. After 2 seconds, close the DVD/CD lid until the CLOSE completion is detected.
d. When the CLOSE completion is detected, stop the DVD/CD lid operation, display the counter in the FL and
    wait for 2 seconds.
e. After 2 seconds, return to step a and repeat the procedure.

3. If finger jam is detected in the middle of the closing operation, or the error that the opening and closing of the lid

does not complete in 5 seconds is detected, “Er 

∗∗∗∗∗

 is displayed at the bottom of the FL, the motor is stopped,

and the unit enters the stand-by mode. (

∗∗∗∗∗

 indicates the number of repetition until the test is stopped.)

4. If the STOP key is pressed, the lid operation is stopped at that point (even in the middle of an operation). The

FL indication does not change. The interrupted operation and counting resume from the same point if the OPEN/
CLOSE key is pressed in this state.

5. Pressing the POWER key closes the lid if it is open, and the test mode is canceled to reset.

Supplementary note:

1. The counter continues endlessly. When it reaches the maximum value (99999), the counter returns to “00000”

and continues counting.

Outline:

This mode is to set the microcomputer of the DVD unit to the write mode onto FLASH ROM. In this test mode, “TEST”
is displayed at the top of the FL and “DVD WRITE” at the bottom. All the key operations except for the POWER key
are prohibited.

Operation: 1. Set the output DVD WRITE port to “L”, and the DVD +B port to “H”.

2. Other ports maintains the state at the transition to the test menu mode, and do not detect any change of input
    except for SYS_STOP and RESET (communication with the DVD unit is interrupted.)
3. If the power key is pressed during this operation, the test mode is canceled and the reset process is started.