CD-CH1000 (serv.man8). Test mode - Sharp Audio Service Manual (repair manual)

– 25 –

IC301

1

9

T306

T302

T311

L312

BF301 

MAIN PWB

FM MUTE
LEVEL

AM IF

TP301

TP301

CNP303

FM/AM LOOP

ANTENNA

AM
TRACKING

AM BAND
COVERAGE fL

FM BAND
COVERAGE fL

FM RF

FM IF

VR351 

T351

T312

R345

T306

T302

MAIN PWB

AM IF

CNP301

AM LOOP

ANTENNA

SO301

FM ANTENNA

TERMINAL

VR351 

T351

R345

FE301

1

FM MUTE
LEVEL

AM
TRACKING

AM BAND
COVERAGE fL

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

Purpose:   To set up the unit for shipping.
Function:  To check the unit for a CD disc, and initialize all functions.
Operation: While checking for a CD disc, the test name (INITIAL) is displayed.

The initial operation for a CD disc is performed. In this operation, the unit is checked for a CD disc.
If a CD disc is found in the unit during the initial operation, "CD* OPEN" is displayed, the tray is opened (only for the
disc found first), and the unit is turned on via the CD function normally.
If no CD disc is found, the CD mechanism is placed in the chucking status.

After the unit is checked for discs, 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

*

•

*

Left adjust in the first line

Example: V1. 1_W:_9

Destination

Number

Span

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.

– 26 –

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.

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 standby 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

A

L

L

C

L

E

A

R

display

Test mode name

I

N

I

T

I

A

L

CD disc inserted

Operation

C

D

*

O

P E

N

Set-Up Complete

Function

F

I

N

I

S

H

– 27 –

(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 standby 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.

(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 standby 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 standby 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 24 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 24

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.

– 28 –

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.

Pickup mechanism error

E-CD01

Slide motor operation error (PU-IN SW detection NG)

Tray error

E-CD20

Tray open/close operation error

Changer mechanism error

E-CD10

Changer mechanism operation error

Relation to RDS

WEAK SIG

When switching to an EON station,

EON reception impossible

it cannot be received due to weak signal

.

PLL UN LOCK

Frequency

Reception error or PLL control error

indicator
flashing

You tried to record on a tape

'PROTECTED'

TAPE mechanism error

E-TA01

Mechanism initialize abnormal end

1.

33 Pin extension

QCNWN6931AFZZ

flat cable, 500 mm

CNP1

CD SERVO PWB-C

33

33

1

1

33

1

CNP901

33

1

33 pin extension flat cable
QCNWN6931AFZZ

MAIN PWB-A