Onkyo A-809 Service Manual

A-809
IC BLOCK DIAGRAM
TMP47C440AN
(Microprocessor)
SELEC
BACKUP
KZ 7
{ <—-—_ VoL down
VOL UP/DOWN 8
<—_—_——\ voi ur ENCDS
9 eae
Sa uerowe { an SEL DOWN POFE
SEL UP RESET
ENCODER
Pin No. Symbol Description
1 VAREF Analog reference voltage for A/D conversion
2 VASS Analog reference GND for A/D conversion
3 KEY Input Selector, Power key input terminal.
° To read Input Selector and Power key by means of A/D conversion
4 INPUT Muting output terminal for Main amplifier input. Active “H”
Muting output terminal for Rec. output. Active “H”
5 RECMUT To be output when switching Input Selector.
To be output continuously in case of Input Selector TAPE-1, TAPE-2, DAT, and DIGITAL-4.
Control output terminal for PLAYER.
6 PLAYER “L” will be output for 200ms if input K64 code for remote control and set Input Selector for
PHONO.
7 VOL DOWN UP/DOWN output terminal for volume. Active “H”
In case of UP (DOWN), VOL UP outpout will be “H” (“L”), while VOL DOWN output will be “L”
8 VOL UP (“H").
When not moving, both outputs shall be “H” (Brake).
9 SEL DOWN UP/DOWN output terminal for Input Selector. Active “H” In case of UP (DOWN), SEL UP output
[fy ? <a Hh | will be “H” (“L”), While SEL DOWN output will be “L” (“H”).
10 SEL UP When not moving, both outputs shall be “H” (Brake).
11 Sl ? : rae or .
Output terminal for switching digital signal.
2 S2 Switch as follows through the position of Input Selector.
13 $3
Input
3
See Output S Output $2 Output ST
DIGITAL-1 L L L
DIGITAL-2 | L L H
DIGITAL-3. | LL H L
DIGITAL-4 L H H
Others
(Analog) a a Hf
14 EXP/JPN Input terminal for remote control initialization when energizing.

Onkyo A-809 Specifications

General

Brand	Onkyo
Model	A-809
Category	Amplifier
Language	English