Sharp CD-BA3000 Manuel de service télécharger pdf (Page 11)

– 11 –

CD-BA3000

Test Stage

Frequency Frequency

Display

Setting/

Adjusting

Parts

Instrument

Connection

CD SECTION

• AM IF/RF

Signal generator: 400 Hz, 30%, AM modulated

*1. Input: Antenna Output: TP302

*2. Input: Antenna Output: TP301

TUNER SECTION

fL: Low-range frequency

fH: High-renge frequency

AM IF 450 kHz 1,720 kHz T351 *1

AM Band — 530 kHz (fL): T306 *2

Coverage 1.1 ± 0.1 V

AM Tracking 990 kHz 990 kHz (fL): T303 *1

*1. Input: Antenna Output: TP301

*2. Input: Antenna Output: Speaker terminal

• FM RF

Signal generator: 1 kHz, 75 kHz dev., FM modulated

FM Band — 87.50 MHz T301(fL): *1

Coverage 1.3 V ± 50 mV

FM RF 98.00 MHz 98.00 MHz L312 *2

(10-30 dB)

Test Stage

Instrument

Connection

Frequency Frequency

Display

Setting/

Adjusting

Point

Figure 11-1 ADJUSTMENT POINTS

Figure 11-2

CD ERROR CODE DESCRIPTION

Error State Code

[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)

Items adjusted automatically

(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.11-2 EFBL)

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

so that the loop gain at the gain crossover frequency will

be 0 dB.)

* Focus gain adjustment

* Tracking gain adjustment

• Adjustment

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.

IC301

AM IF

FM IF

FM RF

T303

T306

T302

L312

TRACKING fL

AM BAND

COVERAGE fL

T301

T351

FM BAND

COVERAGE fL

MAIN PWB

CNP301

FM/AM LOOP

ANTENNA

TP302

R357

TP301

EFBL

FDO

Stopped

CH1=500m V

DC 10:1

CH2=200m V

DC 10:1

CH3=1V

DC 10:1

500m s/div

(500m s/div)

NO R M :20kS/s

=Record Length=

Sm oothing : O N CH1 : 0.000V

CH2 : 0.000V

M ain : 100K

Zoom : 2k

M ode : SING LE

T y p e : E D G E C H 1

D e la y : 0 .0 n s

H o ld o ff : 0 .2 u s

C H 3 : 0 .0 0 V

C H 4 : 0 .0 0 V

BW : FULL

= T rig g e r==Filter= =O ffset=

CH2

v /D IV

200m V

1999/04/05 20:26:47

1 2 ... 6 7 8 9 10 11 12 13 14 15 16 ... 59 60

Commentaires sur ces manuels

Pas de commentaire

Sharp CD-BA3000 Manuel de service Page 11

Commentaires sur ces manuels

Produits connexes et manuels pour Lecteurs de cassettes Sharp CD-BA3000