Sharp PW-E500 Service Manual download pdf (Page 11)

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CD-E500

CD-E55/E44

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 POWER 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 POWER 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 (TEST06) .…....

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.

"POWER 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.

"POWER 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.

"POWER 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.

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Sharp PW-E500 Service Manual Page 11

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