CD-MD3000 (serv.man8). Test mode details - Sharp Audio Service Manual (repair manual)

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Test mode name

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Set-Up Complete

Function

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While the unit is turned off, press the POWER key while holding down the VOLUME-DOWN and PANEL OP/CL keys to enter
the test mode selection mode. Then, the unit is started, the panel is opened, and the microcomputer's version/destination/span
is displayed. If the following data is entered from the keyboard while in the test mode selection mode, the unit directly enters
the specified test mode. This operation is applied to the main unit's keys only.

In the destination display, a destination code (H/W/U/J) is displayed. For the span display, "9" means 9 kHz/50 kHz, and "10"
means 10/100 kHz. All pictures will disappear except the characters.

By pressing the specific key, you can enter the test mode whose functions are as follows:

Menu display

Shortcut Key

Model

System

INITIAL

CD1 PLAY

ALL

Shipping status setting

SOFT_RESET

CD2 PLAY

ALL

Soft rest

CD

CD_TEST

CD1 EJECT

ALL

CD test

Tuner

TUN_PRESET

CD4 EJECT

ALL

Tuner test frequency preset

TUNER_TEST

CD5 EJECT

ALL

Tuner test

MD

MD_TEST

CD

ALL

MD test

Purpose:   To set up the unit for shipping.
Function:   Initialize all functions.
Operation:  All settings are initialized, "FINISH" is displayed as in the sample display, and data entry is prohibited including data

to turn on or off the unit.

Version • Destination

V

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•

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    Left adjust in the first line

Example: V1. 1_W:_9

Destination

Number

Span

The unit returns to the normal operation through reset entry.

In the destination display, a destination code is displayed. For the span display, "9" means 9 kHz/50 kHz, and "10" means 10/
100 kHz.

Name

Description

1

Shipping status setting

Sets up the unit for shipping.

2

Soft set setting

Initializes the unit.

3

CD test

Performs tests such as the CD mechanism test, hardware test, and constant setting test.

4

Tuner test

Presets the test frequency.

frequency preset

5

Tuner preset clear setting

Clears all presets.

6

MD test

Setting MD micro computer to test mode.

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Purpose:     To initialize the unit.
Function:     To initialize all functions.
Operation:   "ALL CLEAR" is displayed, all functions are initialized, and the unit is turned on.

To exit the test mode

When the initialization through soft reset is complete, the unit is turned on.

In the CD test mode, each step can be performed even if the LID-SW is off. However, if you cannot obtain a focus in step
3 or if other kind of error handling starts, you cannot proceed to the following steps. In error handling, press the POWER key
to exit the test mode, or press the STOP key to prohibit operations other than returning to step 1.

(1) Step 1 mode
In the CD test mode, the following display appears, CD initialization is performed, and you are prompted for data.
Reset operation display / Operation
"CD_TEST"
After lighting up for one second

"T1___________0:00"
The keys you can press here and the resulting operations are as follows:

"POWER" ........... The test mode is turned off, the power is turned off, and the unit is placed in the normal stand-by mode.
"FWD" ................ While holding down this key, the pickup moves outward after returning to the innermost track.
"REV" ................. While holding down this key, the pickup moves inward after returning to the innermost track.
"PLAY" ............... Jumps to step 2.
"STOP" ............... Cancelled.
"TAPE REC" ...... Jumps to step 5.

*  While the pickup is moving to the innermost track in the initialization, none of the keys except POWER is accepted. When PU-

IN SW ON cannot be detected in ten seconds, the unit stops the slide motor and shows the following error code. Then, you
can press the POWER key to exit the test mode, or the STOP key to return to step 1. You cannot perform other operations.

"E--CD01"

(2) Step 2 mode
   When the "PLAY" key is pressed in the above mode, the laser is turned on. At this time, another operation must not be

performed.

Display          "T2___________0:00"
The keys you can press here and the resulting operations are as follows:
"POWER" ........... The test mode is turned off, the power is turned off, and the unit is placed in the normal stand-by mode.
"FWD" ................. While holding down this key, the pickup is moved outward.
"REV" .................. While holding down this key, the pickup is moved inward.
"PLAY" ................ Jumps to step 2.
"STOP" ............... Returns to step 1.
"TAPE REC" ....... Jumps to step 5.

Reset operation

Operation

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display

(3) Step 3 mode
   Performs focus search and turns on the focus servo.
   Focus search is repeated until it is brought into focus.

Display          "T3___________0:00"
The keys you can press here and the resulting operations are as follows:
"POWER" ........... The test mode is turned off, the power is turned off, and the unit is placed in the normal stand-by mode.
"FF/FWD" ........... While holding down this key, the pickup is moved outward.
"REW/REV" ........ While holding down this key, the pickup is moved inward.
"PLAY" ................ Jumping to step 4 when a focus is obtained. Otherwise, data entry is prohibited.
"STOP" ............... Returns to step 1.
"TAPE REC" ....... Jumps to step 5.
* You should return to step 1 if it is out of focus after bringing it into focus.

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(4) Step 4 mode
   Rotate a disc.

Displayed string:         "T4___________0:00"

The clock display should always be "0:00".
The keys you can press here and the resulting operations are as follows:
"POWER" ........... The test mode is turned off, the power is turned off, and the unit is placed in the normal stand-by mode.
"FF/FWD" ........... While holding down this key, the pickup is moved outward.
"REW/REV" ........ While holding down this key, the pickup is moved inward.
"PLAY" ................ Jumps to step 5.
"STOP" ............... Returns to step 1.
"TAPE REC" ....... Jumps to step 5.
* You should return to step 1 if it is out of focus.

 Start playback. When the pickup reaches the outermost track, it does not stop. The LCD screen shows the replay time  elapsed
as in the normal CD playback.

Display         "T5___________0:00"

The keys you can press here and the resulting operations are as follows:
"POWER" ........... The test mode is turned off, the power is turned off, and the unit is placed in the normal stand-by mode.
"FWD" ................. While holding down this key, the pickup is moved outward.
"REV" .................. While holding down this key, the pickup is moved inward.
"PLAY" ................ Canceled.
"STOP" ............... Returns to step 1.

* You should return to step 1 if it is out of focus.

Notes:
• In the test mode, TOC IL is not performed.
• Only the keys for adjusting the volume are accepted except the keys described.

Purpose:

To preset a test frequency for an in-factory test.

Function:

To preset each preset number to the band and frequency shown in Table 34 based on the initial setting for the
destination.

Operation:

To preset the band and frequency shown in the table below and turn the unit on with the following setting.

Function

Tuner

Band

FM monaural

Tuning mode

Preset call selection

Call preset number

Preset number 1 frequency

Band's last preset channel

See Table 34

X-BASS

Off

Preset equalizer

FLAT

For other functions, the value which was set when the unit was turned off last time is valid (last state).
To exit the test mode
After the frequency is preset and the set-up is done, the unit is turned on and normal operations start.

1 %

FM   87.5 MHz

FM   87.5 MHz

2

FM 108.0 MHz

FM 108.0 MHz

3

FM

FM   90.0 MHz

FM   90.0 MHz

4

FM 106.0 MHz

FM 106.0 MHz

5

FM   98.0 MHz

FM   98.0 MHz

6 %

AM   522 kHz

AM   531 kHz

7

AM 1620 kHz

AM 1602 kHz

8

AM

AM   603 kHz

AM   603 kHz

9

AM 1404 kHz

AM 1404 kHz

10

AM   990 kHz

AM   990 kHz

11-40

Unused channels are indicated with "––".
"%" indicates the last channel for each band.
All FM bands are preset to FM monaural.

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Enter the test mode, adjust or set as shown in the following table according to the repair operations.

PICK replacement 

HEAD replacement 

MECHANISM 
replacement

MAIN PWB
assembly replacement

MD microcomputer
replacement

MD LSI replacement

RF IC replacement

EEPROM IC
replacement 

TEMP

basic

setting

TEMP

Execution item

required

Repair

operations

number        to      and

" – " is an item that you don't have to execute.

The EEPROM writing result is shown at the end of the test mode

Although "SET" was written normally, it was not written in the "YOBI COMPLETE" state.

Peform "AUTO-YOBI" adjustment. After making a normal adjustment, 

write the preliminary adjustment into the EEPROM.

OK_EEPROM: "SET" and "YOBI COMPLETE" were written normally

WR_EEPROM:

NG_EEPROM: "SET" could not be written.

indicate the order of inplementation.

Checking

EEPROM

setting

EEPROM_SET

AUTO-YOBI

adjustment

AUTO-

adjustment

AUTO-FAB

adjustment

AUTO–YOBI AUTO–ADJ AUTO–FAB TEST-CANCEL

Writing the

EEPROM

setting

TEST-CANCEL

Writing the

EEPROM

setting

TEST-PLAY

Operation check

TEST-REC

Check the connection between the MD microcomputer and the EEPROM.

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5Pin extension flat cable

QCNWK0109AFZZ

2Pin extension connector
QCNWK0129AFZZ

MD MAIN PWB

6Pin extension flat cable

QCNWK0130AFZZ

28Pin extension flat cable

QCNWK0108AFZZ

Extension PWB for service

(RUNTK0532AFZZ)

Fit the extension PWB for service to the mechanism

From Optical
Pickup Unit

From Magnetic Head

From mechanism
switch PWB

1

Extension PWB for servicing

RUNTK0532AFZZ

2

Extension Connector (2 Pin)

QCNWK0129AFZZ

3

Extension Cable (6 Pin)

QCNWK0130AFZZ

4

Extension Cable (5 Pin)

QCNWK0109AFZZ

5

Extension Cable (28 Pin)

QCNWK0108AFZZ