Sharp CD-M4000W Service Manual download pdf (Page 14)

CD-M4000W/CP-M4000

TUNER SECTION

fL:

Low-range frequency

fH:

High-range frequency

AM IF/RF

Signal generator: 400 Hz,

30%,

AM modulated

Test Stage Frequency Frequency

Setting/ Instrument

Display

Adjusting Connection

Parts

AM IF 450

kHz

1,602

kHz T351

‘1

AM Band

531

kHz

(fL):

T306

Coverage

1.1

0.i

AM Tracking 990

kHz

990

kHz

(fL):

T303

. Input: Antenna

Output: TP302

*2.

Input: Antenna

Output: TP301

so301

CNP301

FM ANTENNA

AM LOOP

TERMINAL

ANTENNA

MAIN PWB

[

IC301

L+

R357

Figure

14-1

ADJUSTMENT POINTS

CD SECTION

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.

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.14-2 EFBL)

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

so that the loop gain at the gain crossover frequency will

be 0

dB.)

Focus gain adjustment

’

Tracking gain adjustment

. FM RF

Signal generator:

kHz,

kHz

dev., FM modulated

Test Stage Frequency Frequency

Setting/

Instrument

Display

Adjusting

Connection

Point

FM Band

87.50 MHz T301

(fL):

‘1

Coverage 1.3

FM RF

98.00 MHz 98.00 MHz L312

O-30

dB)

*I.

Input: Antenna

Output: TP301

*2.

Input: Antenna

Output: Speaker terminal

FMIF

Signal generator:

10.7

MHz,

ITest

Staae

Freauencv

Freauenc

I modulated

D&play-

^‘;”

*I.

Input: Antenna

Output: TP301

14-

1 2 ... 9 10 11 12 13 14 15 16 17 18 19 ... 53 54

Comments to this Manuals

No comments

Sharp CD-M4000W Service Manual Page 14

Comments to this Manuals

Related products and manuals for Cassette players Sharp CD-M4000W