CD-E250 (serv.man10). Test mode - Sharp Audio Service Manual (repair manual). Page 2

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The CLV servo ON command (8600) is transmitted to
wait for the following buttons to be pressed. (The disc is
rotated for CLV lock.)

The time display always indicates "0:00".

Press the following buttons in this state to obtain the
operations specified below.
"ON/STAND BY" ..... Test mode and power turned off to

shift to the ordinary standby mode.

"FF/FWD" ................ The pickup slides toward the outer

periphery while this button is pressed.

"REW/REV" ............. The pickup slides toward the inner

periphery while this button is pressed.
If PICKUP IN is on, input is invalid.

"MEMORY/SET" ...... Return to step 5

*If the focus is not received, the process returns to step 1.

When the CD initialization operation flow is completed,
the mute is turned off, and playback is started.  Even if
playback reaches the outermost periphery of disc, the
operation does not stop. The LCD display indicates the
playback passage time as in case of ordinary CD
playback.

Press the following buttons in this state to obtain the
operations specified below.

"ON/STAND BY" ...... Test mode and power turned off to

shift to the ordinary standby mode.

"FF/FWD" ................. The pickup slides toward the outer

periphery while this button is pressed.

"REW/REV" .............. The pickup slides toward the inner

periphery while this button is pressed.
If PICKUP IN is on, input is invalid.

"PLAY" ..................... Invalid
"STOP" ..................... Return to step 1

*If the focus is not received, the process returns to step 1.

Other cautions
• TOC IL is not available for this test mode.

The tuner test mode is intended to store the adjustment
and measurement frequencies in the preset memory
CH.   When adjusting the tuner section in the production
line, adjusting personnel are not required to set frequency.

Press the "TUNER(BAND)" and "VOLUME UP" buttons
in POWER OFF state and turn on the power by the use
of "ON/STAND BY" button to preset and store frequency
for adjustment and measurement of destination specified
by the AREA terminal in the preset memory CH.  However,
Ordinary 1 and Ordinary 2 are stored in the destinations
when the test mode is obtained.

(As for frequencies to be preset and stored for each
destination, refer to item 3.)
The tuner test mode is started from preset No.1.
The operations of test mode are identical with the ordinary
operations of TUNER function.  FUNCTION switching is
invalid.

It is necessary to discard the content of preset memory
when the tuner test mode is ended; be sure to write "0000"
or "1111" bits in the memory to be checked for judging
memory error at initial setting and to initialize memory.

When the tuner test mode is obtained, the following display
lights for one second.

• The TUNER TEST 2 mode is obtained with  >> + MEMORY/
SET + ON/STAND-BY. ->Turn off AC in the TEST 2 mode
to restore the initial state.

Turn off POWER to protect the memory of TEST 2 mode.
Turn off POWER again to obtain the ordinary operation
while the data is stored in the memory (besides TUNER).

If AC OFF state is maintained in this state for about 1/2 day,
start is executed in the initial state.

• To clear the whole memory, insert the AC cord, pressing
MEMORY/SET + CD PLAY.