Roland JP-8080 - Page 12

(4) Is the sine wave which is proper level displayed on a screen of
the oscilloscope?
According to movement of the rotary volumes of INST/LOWER
and VOCAL/UPPER, does the level of the sine wave on a screen
change by degrees?
* If error:
· Check IC17(DSP), IC32(AD/DA), IC43, IC44, IC46, IC51 and
CN6 on the MAIN BOARD.
· Check CN3 on the PANEL BOARD.
(5) Press [WRITE].
[fig.15] is shown on the LCD.
(6) Input the SINE WAVE (ii) to the INST/LOWER jack and the
VOCAL/UPPER jack in rear panel.
Two SIG/LIMITER LEDs of INST/LOWER and VOCAL/UPPER
light up red.
According as you move the rotary volumes of VOCAL/UPPER
INPUT LEVEL with range from the maximum to the minimum,
the value of "vocal" displayed on the LCD changes with range
from 0 to 127.
(7) Do Two SIG/LIMITER LEDs of INST/LOWER and
VOCAL/UPPER light up red?
* If error:
· Check IC43, IC44, IC53, IC54, Q7, Q9, Q15, Q16, Q17, Q18,
Q23, CN3 and CN6 on the MAIN BOARD.
· Check D84(LED), D85(LED), CN2 and CN3 on the PANEL
BOARD.
(8) According to movement of the rotary volumes of
VOCAL/UPPER, does the value of "vocal" displayed on the LCD
change with range from 0 to 127?
* If error:
· Check IC7(80pin:ESPDAC L), IC17(DSP), IC32(AD/DA),
IC43, IC44, IC46, IC48(VCA), IC51 and CN6 on the MAIN
BOARD.
· Check CN3 on the PANEL BOARD.
(9) Press [WRITE].
[fig.16] is shown on the LCD.
(10) Input the SINE WAVE (iii) to the MIC jack in front panel.
The SIG/LIMITER LED of VOCAL/UPPER lights up red.
The sine wave is displayed on a screen of the oscilloscope.
(11) Does the SIG/LIMITER LED of VOCAL/UPPER light up red?
*If error:
· Check IC44, IC50, IC53, IC54, Q7, Q9, Q15, Q16, Q17,
Q18, Q23, CN3 and CN6 on the MAIN BOARD.
· Check D85(LED), CN2 and CN3 on the PANEL BOARD.
(12) Is the sine wave displayed on a screen of the oscilloscope?
*If error:
· Check IC17(DSP), IC32(AD/DA), IC48(VCA), IC50, IC51
and CN6 on the MAIN BOARD.
· Check CN3 on the PANEL BOARD.
(13) Input Test ended correctly.
Press [SHIFT] or [INC], then Initialize program runs
9. Initialize
(1) [fig.17] is shown on the LCD.
(2) Press [WRITE].
(3) [fig.18] is shown on the LCD.
(4) Press [WRITE] again to exit the test mode, then factory data will
be loaded.
· Under normal conditions ‘OK’ displayed on the LCD.
◆ TABLE 1:ERROR MESSAGE of 01 to 0F
* Error in inter-DSP communications.
'x' means wrong inter-DSP communications.
◆ TABLE 2:ERROR MESSAGE of 11 to 4F
* Defect in DSP. Replace it.
'x' means wrong DSP.
◆ TABLE 3:ERROR MESSEGE of 31 to 3F
* Defect in DRAM. Check the DRAM and its bus.
'x' means wrong DRAM.
ERROR MESSAGE FOR MEMORY TEST
TABLE 1
Msg.
01
02
03
04
05
06
07
08
09
0A
0B
0C
0D
0E
0F
IC17-IC18
x
x
x
x
x
x
x
x
IC18-IC19
x
x
x
x
x
x
x
x
IC19-IC20
x
x
x
x
x
x
x
x
IC20-IC21
x
x
x
x
x
x
x
x
TABLE 2 * is 1,2,3 or 4.
Msg.
*1
*2
*3
*4
*5
*6
*7
*8
*9
*A
*B
*C
*D
*E
*F
IC17
x
x
x
x
x
x
x
(x)
IC18
x
x
x
x
x
x
x
(x)
IC19
x
x
x
x
x
x
x
(x)
IC20
x
x
x
x
x
x
x
(x)
IC21
x (all or IC21)
TABLE 3
Msg.
31
32
33
34
35
36
37
38
39
3A
3B
3C
3D
3E
3F
IC63
x
x
x
x
x
x
x
(x)
IC23
x
x
x
x
x
x
x
(x)
IC24
x
x
x
x
x
x
x
(x)
IC25
x
x
x
x
x
x
x
(x)
IC64
x (all or IC64)
[8] Input Test
REAR: Vocal=
[fig.15]
[8] Input Test
FRONT:
[fig.16]
Are You Sure?
[EXIT/WRITE]
[fig.17]
JP-8080
Jul, 1998
12
Factory Reset
[WRITE]
[fig.18]