XL-60 (serv.man7). Test mode - Sharp Audio Service Manual (repair manual). Page 6

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When the test mode is set, the following indication lights for one second.

When this mode is set, BASS/TREBLE is set to 0 (0 dB) and SURROUND mode is set to off, and start-up function is set to CD
when volume is -14 dB (STEP 17). The button operations in the test mode are the same as those of ordinary operation excepting
sound volume UP/DOWN.

(1) The indication is the same as that of ordinary operation excepting test mode setting.
(2) The sound volume control with the sound volume UP/DOWN button is only the following 3 steps unlike the ordinary state.

      Volume- 

∞

 

(STEP 0) <-> Volume-14 dB (STEP 23) <-> Volume-0 (STEP 30)

(3) BASS/TREBLE and SURROUND are switched when button operation is performed.

The current time and timer time are set in the following procedure to perform the timer playback.

1.Set the current time to 1:00, set the timer to ON time 1:02, set the function to Tape, and set volume STEP 8. One minute is counted

as one second, and the timer playback operation is performed. The fade-in (when playback is started) is executed at a rate of
one step for 0.5 sec. After completion of fade-in the fade-out is executed at a rate of one step for 0.5 sec (WAIT 1 sec inserted).
After completion of fade-out the power is turned off (after WAIT 1 sec), and the mode is changed to the standby mode.

  The indication during operation is the same as that of ordinary timer operation.

When the test mode is set, the following indication lights for one second.

g) When 01 to 03CH were all used, scan is aborted at the frequency at which filling occurred, and the following indication

appears.

Number of stored stations -> Indication of stored channel -> Indication of frequency -> Return to initial FM 106.50 MHz (ST)
              (1 second)                         (1 second)                             (1 second)

h) If even one station could not be preset and stored in the APMS mode, "_0MEMORY" is indicated after scanning, and then

FM 106.50 MHz (ST) indication is restored. (The first digit is space.)

("_0MEMORY" is indicated in the test mode.)

i) When the "ASPM" button is pressed after three stations are stored (after full-memory of 30 stations), "ASPM" blinks for 2

seconds, and then FM 106.50 MHz (ST) indication is restored without ASPM scanning. (RDS automatic lighting)

(In case of ASPM button operation in full memory state)

j) After completion of specific operation FM 106.50 MHz (ST) indication is restored.

k) Test mode
Use of only the function button is inhibited.

l) The first channel to be called (when data is stored in the ASPM mode) is 01CH.

m) After start-up in the ASPM test mode the ASPM key is valid even when it is pressed many times. The test mode is kept.
    If three stations are stored (1 to 3CH), full-memory state occurs.
    If the ASPM button is pressed after occurrence of full-memory state, the same operation as that described in item i) is

performed.

In this period up to 3 stations are continuously indicated (1 to 3 CH).

When the LCD test mode is set, all the LCD segments are lighted. After that the indication is changed as follows according to
the "PLAY" button input.

          Lighting of all segments          Lighting of odd segments          Lighting of even segments