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3-2. Display of History of DSP Operations

• When “DSP error detected!” is displayed on the fluorescent dis-

play tube, the history of DSP errors will be displayed eight seconds
later. (See Fig. 1.)

• This history will be displayed if a DSP error has occurred in the

past. It helps the detection of malfunction parts by enabling past
problems of the unit to be checked.

• This history shows the “Cause of error” and “How many times

occurred” for the two DSPs. (See Fig. 1.)

Fig. 1

Corresponding DSP

Contents of fluores-
cent display tube

: 1st DSP (DSP56009)

2nd DSP (SSP424023)

1 2 3 x 0 0 0 0

↑

How to read the
display

4. Operation Check Mode

• During the operation check mode, functions can be set by press-

ing the corresponding button. (See Table-3.)

• Each time a button is pressed, the corresponding function will be

displayed for about 8 seconds.

• Buttons other than those displayed in Table-3 operate usually.
NOTE: Do not press the SET UP button during the operation

check mode. As this button is provided with a special
function for debugging, pressing it may impede the normal
output of signals in the sub-woofer mode.

Table-3:

Button

Function

Outputs the Lch DIGITAL-2 input signal
to the REAR Lch and the Rch to the REAR
Rch.

Fluorescent
Display Tube
Display

Outputs the Lch DIGITAL-3 input signal
to the CENTER and the Rch only to the
WOOFER.

Outputs the Lch DIGITAL-4 input signal
to the FRONT Lch, REAR Lch, CENTER,
and the Rch to the FRONT Rch, REAR
Rch, and CENTER.

DIGITAL2

DIGITAL3

DIGITAL4

OFF

DIG-2
(L-SL, R-SR)

DIG-3
(L-C, R-SW)

DIG-4
(L, R-ALL)

Whole fluorescent display tube lit check
Each time the button is pressed, the fluorescent display tube
lights up as follows.
Lit totally

Lit partially 1

Lit partially 2

Lit totally....

By pressing the MENU knob and displaying “<<< LEVEL ADJUST >>>”,
and rotating the +/– knob to the right, the input signal selected at that time
can be output to any Lch or Rch channel.
(See Table-4.)

Table-4:

Fluorescent Display
Tube Display

Output Destination of Input Signal

Outputs the FRONT Lch/Rch signal only to
the REAR Lch/Rch.

Outputs the FRONT Lch signal only to the
REAR Lch, and FRONT Rch signal to the
REAR Rch.

Outputs the FRONT Lch/Rch signal to the
FRONT Lch/Rch, the REAR Lch/Rch signal
to the REAR Lch/Rch, the CENTER signal to
CENTER, and the WOOFER signal to
WOOFER as usual.

Outputs the FRONT Lch signal to the FRONT
Lch, REAR Lch, and CENTER, and the
FRONT Rch signal to the FRONT Rch, the
REAR Rch, WOOFER.

Exchange (L-SL, R=SR)

Exchange (L-C, R=SW)

Exchange (NORMAL)

Exchange (L, R-ALL)

Number of times the error has occurred

↑

How to read the display

• The left side shows the errors of the first DSP (DSP56009:MAIN

board IC424) and the right side shows the errors of the second
DSP (SSP424023:MAIN board IC423).

• The “How many times occurred” indicates the number of times

that the error has occurred. If an error has occurred more than
256 times, it will be displayed as 256.