CD-MD3000 (serv.man8). Test mode details - Sharp Audio Service Manual (repair manual). Page 3

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(4) Step 4 mode
   Rotate a disc.

Displayed string:         "T4___________0:00"

The clock display should always be "0:00".
The keys you can press here and the resulting operations are as follows:
"POWER" ........... The test mode is turned off, the power is turned off, and the unit is placed in the normal stand-by mode.
"FF/FWD" ........... While holding down this key, the pickup is moved outward.
"REW/REV" ........ While holding down this key, the pickup is moved inward.
"PLAY" ................ Jumps to step 5.
"STOP" ............... Returns to step 1.
"TAPE REC" ....... Jumps to step 5.
* You should return to step 1 if it is out of focus.

 Start playback. When the pickup reaches the outermost track, it does not stop. The LCD screen shows the replay time  elapsed
as in the normal CD playback.

Display         "T5___________0:00"

The keys you can press here and the resulting operations are as follows:
"POWER" ........... The test mode is turned off, the power is turned off, and the unit is placed in the normal stand-by mode.
"FWD" ................. While holding down this key, the pickup is moved outward.
"REV" .................. While holding down this key, the pickup is moved inward.
"PLAY" ................ Canceled.
"STOP" ............... Returns to step 1.

* You should return to step 1 if it is out of focus.

Notes:
• In the test mode, TOC IL is not performed.
• Only the keys for adjusting the volume are accepted except the keys described.

Purpose:

To preset a test frequency for an in-factory test.

Function:

To preset each preset number to the band and frequency shown in Table 34 based on the initial setting for the
destination.

Operation:

To preset the band and frequency shown in the table below and turn the unit on with the following setting.

Function

Tuner

Band

FM monaural

Tuning mode

Preset call selection

Call preset number

Preset number 1 frequency

Band's last preset channel

See Table 34

X-BASS

Off

Preset equalizer

FLAT

For other functions, the value which was set when the unit was turned off last time is valid (last state).
To exit the test mode
After the frequency is preset and the set-up is done, the unit is turned on and normal operations start.

1 %

FM   87.5 MHz

FM   87.5 MHz

2

FM 108.0 MHz

FM 108.0 MHz

3

FM

FM   90.0 MHz

FM   90.0 MHz

4

FM 106.0 MHz

FM 106.0 MHz

5

FM   98.0 MHz

FM   98.0 MHz

6 %

AM   522 kHz

AM   531 kHz

7

AM 1620 kHz

AM 1602 kHz

8

AM

AM   603 kHz

AM   603 kHz

9

AM 1404 kHz

AM 1404 kHz

10

AM   990 kHz

AM   990 kHz

11-40

Unused channels are indicated with "––".
"%" indicates the last channel for each band.
All FM bands are preset to FM monaural.