7
6. Fader
In the FADER CHECK screen, the six fader (slide volume)
conditions are displayed on the left side of the LCD.
The display responses to the each fader's (slide volume's)
movement.
If the faders worked correctly from bottom to top, "OK"
appears at the bottom and top of the each fader displayed
in the LCD.
When "OK" is displayed on all of the faders, "OK!!" appears
in the middle of the screen.
To finish the test, press [
●
(REC)] (LED blinks red), the
menu screen appears.
7. Pot
In the POT CHECK screen, the conditions of three rotary
volumes in the DIGITAL AUDIO EFFECTS section are
displayed.
The display responses to the each volume's movement.
If the each volume works correctly from MIN to MAX, "OK"
appears on the left and right side of the displayed volumes.
When "OK" is displayed on all of the volumes, "**OK!!**"
appears on the top of the LCD.
To finish the test, press [
●
(REC)] (LED blinks red), the
menu screen appears.
8. Beam
This item is not used for A-6.
9. Foot SW
Connect the foot switch (DP-2) to [GPI IN] connector on the
A-6 rear panel before start testing.
In the FOOT SW CHECK screen, "[OFF ] 0" appears on
the LCD. Step on the foot switch at this point, the display is
changed to "[ON ] 127" and "**OK!!**" appeared.
To finish the test, press [
●
(REC)] (LED blinks red), the
menu screen appears.
10. MIDI
Connect [MIDI IN] and [MIDI OUT] connector on the A-6
rear panel with MIDI cable before start testing.
In the MIDI CHECK screen, "MIDI THRU", "IN - > OUT"
are appeared on the LCD. Press [UNDO] at this point.
"OUT- > IN" appears and if there is no error, "**OK!!**"
message is appeared. If there is any malfunction on the
MIDI circuit, "**NG!!**" message would be appeared.
To finish the test, press [
●
(REC)] (LED blinks red), the
menu screen appears.
11. IDE
Install the hard disk drive unit ( equivalent to HDPA6-21 )
to the A-6 before start testing. ( Turn off the power when
installing the hard disk drive unit.)
In the IDE CHECK screen, IDE Interface test starts
automatically.
If there is no error, "IDE CHECK OK!!" appears about
several seconds later.
To finish the test, press [
●
(REC)] (LED blinks red), the
menu screen appears.
12. SCSI
Before start testing, connect both [SCSI] connector of the
zip drive and A6-OP1 with SCSI cable, insert a zip disk to
the zip drive, turn the terminator switch on, set the SCSI
ID of the zip drive to 6, and turn on the power of the zip
drive.
In the SCSI CHECK screen, SCSI test starts automatically.
If there is no error, "SCSI CHECK OK!!" appears.
Followings are example messages when there is any
malfunctions on SCSI.
"NG! A6-OP1(SPC)" message displayed.
➞
Check the IC4(NCR53CF92) on the A6-OP1.
"NG! NO DRIVE" message displayed.
➞
Check the SCSI ID of the zip drive, and check
SCSI cable, etc.
To finish the test, press [
●
(REC)] (LED blinks red), the
menu screen appears.
13. Analog I/O
In the ANALOG CHECK screen, "Fs=32.0kHz" and other
messages are appeared on the LCD.
The check procedures are described as below.
a. [CD] INPUT - > [MASTER] OUTPUT TEST
Turn the [CD] volume on the INPUT MIXER section to
the MAX.
Connect the oscillator ( wave form generator ) to [CD]
INPUT, Input the sine wave with 1kHz and 620mVp-p.
(The setting of the oscillator is in common with the all
checks.)
Connect the oscilloscope to the [MASTER] OUTPUT.
If the connection is correct, the sine wave about 8Vp-p
is output.
b. MUTE CIRCUIT TEST
Under the condition (a.) above, press [4/(8)] on the
LOCATOR section.
The MUTE circuit is normal condition when "Mute:
OFF" on the up right of the LCD is changed to "Mute
ON" and the wave form output is stopped(muted) at the
same time.
c. [VCR] INPUT - > [MONITOR] OUTPUT TEST
Turn the [VCR] volume on the INPUT MIXER section to
MAX.
Reconnect the oscillator ( wave form generator ) to
[VCR] INPUT and the oscilloscope to [MONITOR]
OUTPUT.
At this point, check the input wave form as same as the
procedure (a.).
The sine wave has about 8Vp-p is output under normal
condition.
d. SWITCHING SAMPLING FREQUENCY TEST
Under the condition (c.), press [3/(7)] on the LOCATOR
section to switch "Fs=32.0kHz" to "Fs= 44.1kHz" on the
up left of the LCD.
If there is no changes of the wave form, the check is
successful.
e. HEADPHONES TEST
The display "MASTER" under the "PHONE" is changed
from "MAS" -> "MON"-> ""M+M"-> "OFF" each time
[2(6)] on LOCATOR section is pressed.
The headphones output also switched simultaneously.
First connect the headphones and input the oscillator's
( wave form
generator's ) signal to [CD] INPUT.
When switch the output and there is no error, the sound
can be heard from the headphones at only "MAS" and
"M+M".
When connect the oscillator (wave form generator) to
[VCR] INPUT and there is no error, the sound can be
heard from the headphones at only "MON" and "M+M".
A-6
Oct, 1998