—11—

CXA1980Q

Description of Operation

(1) Signal route

Fig. 1

Op1 and Op2 are operational amplifiers.

Op1 compose the playback equalizer by attaching a resistor and a capacitor to PBFB pin, and a capacitor

to PBTC pin.

Op2 is an input selector and a LINEOUT amplifier. The gain of LINEOUT amplifier is 24 dB.

Reference input level for Dolby is –30 dBm.

The adjustment method of playback equalizer is described in the paragraph (3).

(2) Level diagram

Fig. 2

Op2

4dB

20dB

20dB

AUX

TAPE

Op1

PBFB PBTC

PBOUT

Dolby level

(–30dBm)

TAPEIN

(–6dBm)

LINEOUT

PBIN

F

R

NR

–10

–15

–20

–25

–30

–35

–40

–45

–50

–55

–60

–65

–70

–75

P

B

I

N

VR adjustment

–30dBm

–30dBm

–6dBm

Dolby level

–70dBm

–5

P

B

O

U

T

T

A

P

E

I

N

L

I

N

E

O

U

T

0dBm