Roland JX-305 GROOVESYNTH Service Notes page 11

JX-305
2-4. Remove the MIDI cable.
Display shows "Disconnect ok", and then next test run
automatically.
Troubleshooting for MIDI test
Result of Test Check
No response Check Q4
Is signal level of the PEDAL change ?
Display remains "on" Check the condition of connection of
L9-12,R47,48
3. Card Test
When MIDI Test ends normally, Card Test runs
automatically.
(or in the initial display of the test mode, press [BANK 3]
while holding down [SHIFT])
3-1. When Card test starts, the following display appears.
3-2. Insert a card with write protected.
Does the LCD display "ok" ?
3-3. Remove the card once, and insert the card with not
write protected.
Does the LCD display "ok" ?
NOTE: When you execute card test mode, the data in card
will be lost.
Use the card for test.
Troubleshooting for Card test
Result of Test Check
No response Check IC29 (Pin 1 / 2 / 7)
If the Card is inserted, Voltage of
IC29 Pin 1 becomes high level.
Protect NG! Check R18, IC5
Is the voltage of XCWP Low level?
Read / Write NG Check IC30 (Pin 3 / 6)
Is the level of XRE / XWE change
during the test?
Check IC20, RA16
Is there something wrong with card
bus ?
Check IC30 (Pin 8) / IC32
Is there something wrong with decoder
Check the IC29 (Pin 3, Write Protect)
Is the voltage of XWP High level?
4. Pedal Test
When Card Test ends normally, Pedal Test runs
automatically.
(or in the initial display of the test mode, press [BANK 4]
while holding down [SHIFT])
4-1. When Pedal test starts, the following display appears.
4-2. Connect the Foot Pedals to the Hold Jack and the
Switch Jack.
4-3. Step on the HOLD Pedal. And check that "on" have
been displayed.
4-4. Foot off the HOLD Pedal. And check that "off" have
been displayed.
4-5. Step on the SWITCH Pedal. And check that "on" have
been displayed.
4-6. Foot off the SWITCH Pedal. And check that "off" have
been displayed.
Sep. 1998
11