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

Model
CD-E250 (serv.man10)
Pages
4 Few pages! See other manuals at the bottom of the first or last page.
Size
48.08 KB
Type
PDF
Document
Service Manual
Brand
Device
Audio / System / Test mode
File
cd-e250-sm10.pdf
Date

View Sharp CD-E250 (serv.man10) Service Manual online

CD-E250E
CD-E550E
– 12 –
TEST MODE
The test mode applied to this microcomputer has three modes,
namely the ordinary test mode for adjustment or measurement,
the aging test mode, and the self-diagnosis test mode for self-
judgment in case of final product inspection.
1.  Turning on the test mode
For obtaining each test mode, press the ON/STAND BY
button, while keeping pressing the following two buttons in
the ordinary stand-by mode (power off ).  In this case, the
main unit buttons are valid.  When turning the POWER on
with remote control buttons, test modes are not obtained.
[Ordinary test mode]
1. CD Test Mode (TEST 1) ..........................................
CD + VOLUME UP
2. Tuner Test Mode (TEST 2) ......................................
TUNER(BAND) + VOLUME UP
3. Electronic Volume Test Mode (TEST 3) ..................
TUNING DOWN + VOLUME UP
4. Timer Test Mode (TEST 4) ......................................
TIMER/SLEEP + VOLUME DOWN
5. FL Test Mode (TEST 5) ...........................................
CLOCK + VOLUME DOWN
6. CD MECHANISM Aging Test Mode (TEST 8) ........
MEMORY/SET + VOLUME DOWN
2. CD Test Mode (TEST 1)
In the CD test mode the operation of each step is possible
even if the LID-SW is off.  If focus cannot be taken in step
3 or any error is processed, it is impossible to proceed to
the next step.  During error processing, end the test mode
by pressing the ON/STAND BY button or return to the step
1 by pressing the CD STOP button.  Any other operations
are inhibited.
1. Step 1 Mode
When the CD test mode is obtained, the following display
lights up.  Then CD initialization operation flow proceeds
up to CD STB off to wait for the following buttons to be
pressed.
[Self-diagnosis Test Mode]
1.  Button input diagnosis test mode (TEST 6) .…....
TUNNIG UP + VOLUME UP
Processes are different depending on destinations at initial
settings.
One second after display lights up
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" ................. After the pickup returns to the
innermost periphery, it slides toward
the outer periphery while this button
is pressed.
"REW/REV" .............. After the pickup returns to the
innermost periphery, it slides toward
the inner periphery while this button
is pressed.  If PICKUP IN is on, input
is invalid.
"MEMORY/SET" ...... Shift to step 2
"STOP" ..................... Invalid
"VIDEO/AUX" ........... CLV
2. Step 2 Mode
Press the "MEMORY/SET" button in this mode to transmit
the laser lighting command LDON (8400) and turn on the
laser.  Any other operations are not performed in this case.
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" ...... Shift to step 3
3. Step 3 Mode
While the laser keeps lighting, CD initialization operation
flow proceeds up to 'CLV servo ON' to wait for the
following buttons to be pressed.(Focus servo turned on
for focus search)
The focus search is repeated to take focus.
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" ...... If focus has been taken, shift to step 4
is executed. If not, acceptance is
inhibited.
*If the focus is not received after it has been taken, the
process returns to step 1.
– 13 –
CD-E250E
CD-E550E
4. Step 4 Mode
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.
5. Step 5 Mode
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.
3. Tuner Test Mode (TEST 2)
1. Outline of tuner (radio) 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.
2. Details of tuner test mode
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.
CD-E250E
CD-E550E
– 14 –
3.Preset frequencies for various destinations
(random preset memory)
BAND
6
AM  530 kHz
7
AM1720 kHz
8
AM
AM  990 kHz
9
AM  600 kHz
10
AM1400 kHz
AM
CH
BAND
16-35
36
FM106.0 MHz
37
FM  90.0 MHz
38
FM
FM  98.0 MHz
39
MONO
FM108.0 MHz
40
FM  87.5 MHz
FM
CH
• The slant line sections of the table store no memory.
BAND
1
FM  87.5 MHz
2
FM108.0 MHz
3
FM
FM  98.0 MHz
4
STEREO
FM  90.0 MHz
5
FM106.0 MHz
FM
CH
4. Electronic volume Test Mode (TEST 3)
When this test mode is obtained, the following display lights
for one second.
In this mode, volume is Volume -14 dB (STEP 23), FLAT
AND X-BASS ON, and start-up function to CD, respectively.
The button operations in the test mode are the same as
those of ordinary operation except volume UP/DOWN.
(1) The display is the same as that of ordinary operation
except test mode setting.
(2)  Unlike the ordinary state, the volume is controlled with
the volume UP/DOWN button in accordance with the
following three steps.
      Volume- 
 
(STEP 0) <-> Volume-14 dB (STEP 23) <-
> Volume-0 (STEP 30)
(3) X-BASS is switched when button is pressed..
5. Timer test Mode (TEST 4)
When this test mode is obtained, the following display lights
for one second.
Set the current time and timer time according to the following
procedure to reproduce the timer.
1.Set the current time to 1:00, the timer to ON time 1:05, the
function to CD, and volume to STEP 12, respectively.  One
minute is counted as one second, and the timer is reproduced.
The fade-in (when playback is started) is executed at a rate
of one step for 1 sec.  After completion of fade-in, the fade-
out is executed at a rate of one step for 1 sec (WAIT 1 sec
inserted).
  After completion of fade-out, the power is turned off (after
WAIT 1 sec), and the mode is shifted to the standby.
  The display during operation is the same as that of ordinary
timer operation.
6. FL Test Mode (TEST 5)
When the FL test mode is obtained, all the FL segments are
lighted. Then pressing the "PLAY" button switches display
as below.
Lighting of all segments
Lighting of odd segments
Lighting of even segments
– 15 –
CD-E250E
CD-E550E
7. Button input diagnosis Test Mode (TEST 6)
When the test mode is obtained, the following is displayed.
(STAND-BY AND DEMO OFF STATUS)
This test mode is intended to check whether all the main
unit buttons can be detected.  Accordingly, in this test
mode, it is checked whether the "ON/STAND BY" button
was pressed after all the buttons shown below were pressed.
If the result is OK, OK is displayed.  If any one of keys was
not pressed, an error is displayed.  In both cases of OK
termination or error termination, the mode is shifted to the
standby mode if the "ON/STAND BY" button is pressed
subsequently.
All models using this type of microcomputer are not always
provided with the same buttons.  Since the buttons used are
different depending on models, types of buttons to be used
are determined by whether SURROUND, and an electric lid
are available at the initial setting by MODEL port.
The order of buttons to be pressed is not determined.
Accordingly, it is checked whether all buttons have been
pressed.
1. PU-IN buttons: REW/PRESET DOWN + CD STOP
Since this model is provided with SURROUND (HAVE
OR NOT),  and electric CD lid, the following 10 buttons
are detected as all buttons.
PLAY, X-BASS/DEMO, FUNCTION, VOLUME UP/
DOWN, MEMORY/SET, REW, FF, STOP, CD-OPEN/
CLOSE
The OK/ERROR display of test result is as follows.
8. CD MECHANISM Aging Test Mode (TEST 8)
OPEN/CLOSE & 3 DISC CHANGER aging test.
DISPLAY:
FUNCTION:
Enter the TEST MODE 8, MCU control the 3 DISC
CHANGER OPEN/CLOSE. After open finished, tray rotate
1 circle (360 degree). Then close, After close finished, tray
rotate 1 circle (360 degree) again.
Request:
Every period include 4 operation. Below is TIMING:
Enter test mode
CHANGER
Find the disc 1 position
open
delay 3S after open finish
rotate 1 circle
close
delay 3S after close finish
rotate 1 circle
Page of 4
Display

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