DOWNLOAD Sharp CD-BA2010 (serv.man4) Service Manual ↓ Size: 1 MB | Pages: 18 in PDF or view online for FREE

– 13 –

1. Remove the stop washer (B1) x 1 pc., to remove the gear

(B2).

2. Remove the screws (B3) x 2 pcs., to remove the shaft (B4).
3. Remove the pickup.

Perform steps 1, 2, 3, 12 and 15 of the disassembly method
to remove the CD mechanism.

1. Bend the hooks (A1) x 5 pcs., to remove the loading motor.

Note
After removing the connector for the optical pickup from the
connector, wrap the conductive aluminium foil around the
front end of connector to protect the optical pickup from
electrostatic damage.

(A1)x2

(A1)x1

Loading Motor

Slide Chassis

(A1)x2

•

Play: TW-2111

Tape 1: Over 80 g
Tape 2: Over 80 g

•

Play: TW-2111

30 to 80 g.cm

30 to 80 g.cm

Fast forward: TW-2231

—

70 to 180 g.cm

Rewind: TW-2231

—

70 to 180 g.cm

Normal

MTT-111

Variable

3,000 

±

Speaker

speed

Resistor in

30 Hz

terminal

motor.

(Load

(MM1)

resistance:
6 ohms)

•

TAPE MECHANISM

Motor

Variable Resistor
in motor

(B3)x2
ø2.6x6mm

Shaft
(B4)x1

Stop Washer
(B1)x1

Gear
(B2)x1

CD Mechanism

Pickup

– 14 –

• 

Signal generator: 400 Hz, 30%, AM modulated

*1. Input: Antenna

Output: TP302

*2. Input: Antenna

Output: TP301

fL: Low-range frequency
fH: High-range frequency

AM IF

450 kHz

1,620 kHz

T351

*1

AM Band

—

522 kHz

(fL): T306

*2

Coverage

1.1 

±

 0.1 V

AM Tracking 990 kHz

990 kHz

(fL): T303

*1

FE301

R381

TP302

TP301

R357

AM IF

T303

T306

AM

TRACKING fL

AM BAND

COVERAGE fL

T351

TUNER PWB

CNP302

AM LOOP

ANTENNA

SO301

FM ANTENNA

1

[Servo System Error]

0001

Cannot detect Pickup-in SW

0002

DSP access error

[Error during close operation]

0101

Open/Close SW not functioning (Low 

→

 High)

0103

Open/Close SW not functioning (High 

→

 Low)

[Error during open operation]

0201

Open/Close SW not functioning (Low 

→

 High)

0203

Open/Close SW not functioning (High 

→

 Low)

[Error during skip operation]

0302

Pickup-in SW is not detected

0306

During Disc 1 search, Open/Close SW or Clamp SW
or Disc SW do not change to low.

0307

Clamp SW not function (Low 

→

 High)

0308

Clamp SW not function (High 

→

 Low)

Since this CD system incorporates the following automatic
adjustment functions, readjustment is not needed when
replacing the pickup. Therefore, different PWBs and pickups
can be combined freely.
Each time a disc is changed, these adjustments are
performed automatically. Therefore, playback of each disc
can be performed under optimum conditions.

(1) Offset adjustment (The offset voltage between the head

amplifier output and the VREF reference voltage is
compensated inside the IC.)

  * Focus offset adjustment
  * Tracking offset adjustment

(2) Tracking balance adjustment (waveform drawing Fig.

14-2 EFBL)

(3) Gain adjustment (The gain is compensated inside the IC

so that the loop gain at the gain crossover frequency will
be 0dB.)

  * Focus gain adjustment
  * Tracking gain adjustment

•  Adjustment

EFBL

FDO

TE

Stopped

•  FM
Notes:
1: Description of the "FM IF Adjustment" is not carried on this

Manual. It is because the IF coil in the FM front end section
has been best adjusted in the factory so that its further
adjustment is not needed at the field. When replacing the
FM front end assembly, no adjustment is needed either.

2: The parts in the FM front end section are prepared in a

complete unit, so you can't obtain each part individually.

– 15 –

Yes

Yes

Comparing freg.

same or not?

Between current receiving

frequency and (already)

previously memorized

frequency.

Hold down the ASPM button for 3 more second.

No operate. After displayed “END”. Return to

previous station.

“ASPM” blinks in the display.

Begin to scan start 87.50 

→

 108.00 MHz

Preset CH memory full over?

SD (TUNE) DET out OK?

Yes

No

No

No

No

No

If count 1st OK?

Yes

If count 2nd OK?

Yes

RDS signal or not?   PI—identify

Yes

Comparing PI cord

same or not?

between current receiving

PI and before PI which is

already memorized by

ASPM on this time.

Yes

Yes

No

Comparing freg.

same or not?

between current receiving

frequency and (already)

previouslymemorized

frequency.

No

Memorized to the lowest vacant

preset channel.

No

Memorized to the lowest vacant

preset channel.

Compare the field

strength of current receiving

signal.

Is receiving signal stronger than

signal which has same PI cord

and is already memorized to

preset memory ahead of this

receiving time?

No effect

No effect

No effect

Effect

Pass

No effect

Pass

No effect

Pass

No effect

Pass

No effect

Displayed the TTL quantity of memorized

stations by ASPM operation on this time.

And return to the previous

receiving freq. automatically. 

Begin to ASPM SCAN from the next

CH-SPAN again.

Repeat and continue with same format

ASPM operation untill 108 MHz.

After reached 108 MHz, displayed the TTL

quantity of memorized stations.

And return to the previous receiving freq.

automatically.

Preset CH memory become full over?

Yes

No

– 16 –

4. No adjust type (None adjusting circuit.)
5. Added EON button.
6. Need to change RDS logo due to the addition of EON feature.
7. Added EON—TI, EON—PTY function.

EON—PTY: Select and set the desired “PTY” 

→ 

stand-by 

→ 

switch to ON (other network) Station at the start of desired PTY

automatically 

→ 

stay and listen to PTY of ON station 

→ 

switch back to TN (This net) station automatically at the end

of PTY (ON) i.e. after changing to another PTY (except AFFAIRS) or cancelling to receive PTY of ON station
midway.

EON—TI:

Select and set the “TI” 

→ 

stand-by 

→ 

switch to ON station at the start of traffic announcement automatically 

→ 

stay

and listen to TA of ON station 

→ 

switch back to TN station automatically at the end of TA (ON).

Ie after TA (ON) is over or cancelled to receive TA of ON station midway.
When switching TN 

→ 

ON station.

In case of exist 2 more stations having the desired (specified) “PTY” or “TI”, the receiver will select and switch to ON station
comparing field strength at the same time. But when the frequency of ON station exists in the preset-memory, then receiver
switches straight to that ON station (CH), without comparing field strength so can make a quick switching from TN—ON station.
Preset memory takes priority of switching TN—ON station.
Therefore ASPM is usefull not only for PTY search but also for rapid EON switching.
Anyway CD-BA2010H EON is basically stand-by and receiving method, along with the Guidelines for EON implementation.

• ASPM SCAN: 87.50 MHz 

→

 108.00 MHz.

• Only RDS signal is memorized by ASPM because RDS signal has PI code and is suitable and convenient for ASPM operation.
  ASPM
  Comparing field strength, only one strongest RDS station is memorized of all stations (repeater relay stations)  that have same

PI code.

Same PI code —  freq: different

   (AF’S)

      PS: same
      PTY: same

Each PI has AF’S list by individually.
Exa: P1 has f

1

, f

2

, f

3

 (same PTY).

        P2 has f

4

, f

5

 (same PTY).

Pickup and memorized to preset CH.

f 1
f 2

f 3

P 1 (PI code)
PS 1 (Station Name)

f 5

f 4

P 2
PS 2

     f 6
f 7

f 8

P 3
PS 3

f 9

f 10

f 11  f 12  f13

P 4
PS 4

  Select signals (f1, f5, f7, f10) are memorized in the preset memory by ASPM.
• If tentative - ASPM operation is repeated intentionally, never memorized (over write) at the same frequency.

1st time ASPM 

→ 

strongest stations of each PI are memorized.

ASPM is not only very usefull for PTY search, but also EON operation.
2nd time ASPM 

→

 2nd strong stations of each PI are memorized and so on.

PTY search function is equal to FM band search function as a result.

CD-BA2010H RDS function is equal to adding EON feature to the current CD-C75H RDS.
EON feature is EON—PTY and EON—TI.
Although PTY and TI indicators are separated, PTY contains TI in the PTY items (software) like current PTY search items.

NEWS,

AFFAIRS,

INFO,

ALARM,

TI

(TTL 17 kinds)

EON—PTY

EON—TI

Can select and stand-by

Can select and stand-by

EON—PTY and EON—TI are basically stand-by 

→

 receive the desired program of ON station.

1. PTY item: added TA. (TTL 18 kind.)
2. Each “TP”, “TA” ind. Light up or go out individually.
    “TA” ind. Doesn’t light up on current model, CD-C75H due to none EON—TI.
3. Added 3 indicators (in FL) due to adding EON feature.
    EON: Lights up only during receiving EON data (14A).
    TI:

During EON-TI stand-by 

→

 Light up

During receiving ON station. 

→

 blink.

    PTY: During EON-PTY stand-by 

→

 Light up

During receiving ON station. 

→

 blink.

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