SD-SH111 (serv.man8). Adjustment - Sharp Audio Service Manual (repair manual). Page 6

– 21 –

Supplementary notes:

1. The DVD/CD lid cannot be opened or closed (loading or unloading discs) in this test mode. After loading a disc,
    turn the power off to enter this test mode.
2. Operations of keys unrelated to the DVD operations are not accepted except for the POWER key. Therefore, you
     cannot switch functions, control volume, or control DSP, etc. The controls of electronic volume IC, input selector
    of the A/D and D/A converter, and monitor output are fixed to the settings of the DVD/CD functions.

Outline:

In this test mode, all the operations except for volume control can be controlled in the same way as in the regular
power on state. The function can be switched to another, and the DVD can be played as well as the AC3 and DTS
multichannel playback, etc.
Only the volume control differs from the normal operation, and it can be changed among only 4 levels of 0, 1, 25,
and 40.

   Function:

1. After entering the test mode, start the unit as set to the VTR (VTR1) function in the same manner as the normal
    operation.
2. Start up the unit with the volume set to 25 (-16dB) and the surround set to the STEREO mode. X-BASS must be
    turned off.
3. The volume can be increased or decreased among 4 levels of 0, 1, 25, and 40 only if the volume control key input
    is performed.
4. “AMP TEST” is always displayed at the bottom of the FL. It changes to the operational indication for 3 seconds
    only when the following operations are performed. All the controls except for the display perform the same
    operations.
    • The volume level is displayed when it is changed.
    • When the X-BASS key is operated, its ON/OFF status appears.
    • The frequency appears when the function is switched to TUNER.
    • The operation is displayed for the first 3 seconds when the DVD play, stop, or pause operation is performed.
    • When various errors occur. In this case, the error is always displayed until it is restored.

∗

  The elapsed time during DVD/CD playback is not displayed.

Function:

Audio circuit test

a) Volume levels can be set in 3 steps (low, middle and high).

Initial settings

1. Volume:

step 2 (-16 dB)

2. X-BASS:

OFF

3. Function:

test

4. Function:

VTR

5. Surround mode:

STEREO

Operation
Volume levels can be controlled in 4 steps below.
Other operations are performed normally.

0

0

0

-

∞

1

1

1

-80 dB

2

25

25

-16 dB

3

40

40

0  dB