M65845AFP

REJ03F0170-0201 Rev.2.01 Jan 25, 2008

Page 8 of 13

Input impedance to pin 35 is so high (1 M

Ω) that ALC base voltage can be determined by division resistance.

35

R16

R17 (51 k

Ω)

C33 (0.01

μF)

ALC Operation Voltage (dBV)

Pin 35 Control Voltage VALC (V)

Resistance R16 (

Ω)

+3

0.50

5.6 k

0

1.09

15 k

–2

1.38

20 k

–4

1.61

24 k

–6

1.79

27 k

–8

1.94

33 k

–10

2.05

36 k

MIC SW

Input low level to pin 31 (MIC SW), then microphone and echo signal can be cut.

Pin 31 (MIC SW)

MIC SW

Echo Signal Output

H or Open

On

On

L

Off

Mute

Audio Source Select

Changing the switch, sound source changes four patterns matching with Karaoke soft.

Pin 33 AUDSW1: D1

Pin 34 AUDSW2: D2

Movements

L

L

Stereo

L

H

Lch monaural

H

L

Rch monaural

H

H

Vocal cut

1. Stereo

Under the conditions usual 2ch are played back to each outputs.

2. Lch monaural

Under the conditions Lch source is played back to 2ch outputs and suitable for Karaoke reproduction of multiple

Karaoke soft and main sound reproduction of laser disks.

3. Rch monaural

Under the conditions Rch source is played back to 2ch outputs and suitable for reference vocal reproduction of

multiple Karaoke soft and sub sound reproduction of laser disks.