Sharp XL-3000 Service Manual download pdf (Page 11)

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XL-3000/3000C

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 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).................................... REW/PRESET DOWN + VOLUME UP

2. Tuner Test Mode (TEST 2).................................REW/PRESET DOWN + CD PLAY

3. Electronic Volume Test Mode (TEST 3)............. REW/PRESET DOWN + FF/PRESET UP

4. Timer Test Mode (TEST 4)................................. FUNCTION + VOLUME UP

5. LCD Test Mode (TEST 5)................................... FUNCTION + FF/PRESET UP

6. Electric CD Lid Aging Test Mode (TEST 8)........ FUNCTION + CD PLAY

Processes are different depending on destinations at initial settings.

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 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.

One second after display lights up

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

"POWER" .................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.

"PLAY" ..................... Shift to step 2

"STOP"..................... Invalid

"FUNCTION" ............ Shift to step 5

FUNCTION + VOLUME

[Self-diagnosis Test Mode]

1. Button input diagnosis test mode (TEST6)........

1 2 ... 6 7 8 9 10 11 12 13 14 15 16 ... 63 64

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Sharp XL-3000 Service Manual Page 11