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JP-8080
* If [fig6] does not appar on the LCD:
[fig.8] is shown on the LCD.
[3] Card Test
protected
[fig.8]
· Check R99 and IC12(14pin:CWPSNS) on the MAIN BOARD.
Is there voltage of CWPSNS low level?
(4) Sw&LED Test runs automatically.
4. Sw&LED Test
(1) [fig.9] is shown on the LCD.
[4] Sw&LED Test
(58)
[fig.9]
(2) Do all LEDs (except two SIG/LIMITER LEDs) light up ?
* If error:
· Check LEDs and Transistors on the PANEL BOARD.
· Check IC3, IC7 and IC13 on the PANEL BOARD.
(3) Press the buttons on the panel one by one.
The count displayed on the LCD decreases as each button is
pressed.
· In case of buttons with single color LED : Press the button,
then LED turn off.
· In case of buttons with double color LED:
At first, LED lights up orange.
Press the button once, then LED lights up green.
Press the button again, then LED lights up dark green.
Press the button once more, then LED is turned off.
· In case of self-lighting buttons(PANEL SELECT and MOTION
CONTROL)
At first, LED lights up red.
Press the button once, then LED's red dims a little.
Press the button again, then LED's red dims ******.
Press the button once more, then LED is turned off.
· In case of buttons without LED:
In case of being no LED nearby:
Press the button, then "o" is turned off on the LCD.
· In case of being some LED nearby (Example:three LEDs):
Press the button, 1st LED is turned off.
Press the button again, 2nd LED is turned off.
Press the button once more, 3rd LED is turned off.
(4) Are all buttons and LEDs working as above?
After pressing all buttons, Is number shown on the LCD now at
(0)?
* If error:
· Check switches, LEDs and Transistors on the PANEL
BOARD.
· Check IC3, IC7 and IC13 on the PANEL BOARD.
(5) If all switches and LEDs are working correctly, A/D Test program
runs automatically.
5. A/D Test
(1) [fig.10] is shown on the LCD.
[5] A/D Test
(41)
[fig.10]
(2) Move all the rotary volumes (except LEVEL at VOLUME section,
INST/LOWER and VOCAL/UPPER at EXTERNAL INPUT
section) fully right and fully left.
10
NG
oo oo ooo
Move all the sliders fully up and fully down.
The values displayed at the lower right of the LCD change within
the ranges listed below as each volume or
slider is moved.
Volumes and sliders without center click
:0~127
OSC2 RANGE
:-WIDE~+WIDE
OSC2 FINE/WIDE
:-50~+50
TEMPO
:20~250
Other volumes and sliders with center click
:-64~+63
The count displayed at the lower left of the LCD decreases as
each volume or slider is moved.
(3) Do the values displayed at the lower right of the LCD change
within the ranges listed above?
Finally, do the count displayed at the lower left of the LCD
decrease from (41) to (0)?
* If error
Check IC1, IC2, IC4, IC5, IC6, IC8, IC9, IC10 and IC11 on the
PANEL BOARD.
(4) A/D Test ended correctly.
LCD Test program runs automatically.
6. LCD Test
(1) [fig.11] is shown on the LCD.
[6] LCD Test
[fig.11]
Press [WRITE], then all dots of LCD are turned off.
Press [WRITE] again, then all dots of LCD are turned on.
(2) Are all dots of LCD turned off correctly?
Are all dots of LCD turned on correctly?
* If error:
· Check the LCD unit.
(3) Move the slider of FILTER ENVELOPE R from the minimum to
the maximum, then LED of number buttons light up in order
from [NUMBER 1] to [NUMBER 8], and also the contrast of LCD
changes gradually.
(4) Do LEDs of number buttons light up in order from [NUMBER 1]
to [NUMBER 8]?
Does the contrast of LCD change gradually?
* If error:
· Check Q1, IC7(1pin:PWM) on the MAIN BOARD.
(5) Press [NUMBER 7] or [INC], then Sound Test program runs.
7. Sound Test
(1) [fig.12] is shown on the LCD.
Connect the monitor speaker to the OUTPUT jack.
Connect the headphones to PHONES jack.
Raise the volume as needed.
[7] Sound Test
[fig.12]
(2) Press [WRITE], then "L: Saw" is displayed on the LCD.
Check the signal at the OUTPUT L with an oscilloscope.
Check that a sound can be heard from left channels of the
monitor speaker and the headphones.
(3) Do triangular waveforms appear on both channels on an
oscilloscope?
Can sound from the triangular waveforms be heard on both
channels of the monitor speaker and the headphones?
* If error:
· Check IC31, IC35, IC36(DAC), IC37, IC55 and IC56 on the
MAIN BOARD.
· Check IC601 on the VOLUME BOARD.
Jul, 1998
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