10
Feb.2003
3.
Press the [INTRO START] button and check the sound of pattern
playback.
4.
Turn the volume knob and make sure that the volume level changes
smoothly.
5.
Press the [STOP] button to stop playback.
6.
Press the [INST] button.
fig.test16-1
7.
Tap the [INTRO START] (KICK) and [ENDING STOP] (CYM 3) buttons
forcefully and gently, and check the resulting sound.
At this time, also make sure that the volume level changes in accordance
with the force with which the buttons are tapped.
8.
Switch off the DR-3.
17.Residual-noise Check
1.
Switch on the DR-3 unit and start the normal mode.
2.
Set [VOLUME] on the DR-3 to “MAX” and measure residual noise at L
(PHONE) and R (MONO) using a noise meter.
A dummy plug must be inserted into L (PHONE) when performing
measurement at R (MONO).
The levels at both L (PHONE) and R (MONO) must be -88 dBm or less
(WEIGHT JIS-A or IHF-A).
18.Battery-operation Check
1.
Detach the cord from DC IN on the DR-3.
2.
Install six AA-size dry-cell batteries in the DR-3.
fig.battery
3.
Switch on the DR-3 unit.
4.
Make sure the product starts and the LEDs are as follows.
• [MANU], [PTN], [SOUND SHAPE], and [AMBIENCE] LEDs lighted.
• [INTRO START] LED flashing.
5.
Switch off the DR-3.
TEST MODE ERROR MESSAGE
fig.error-1
• aaaaaaaa ---> This indicates the address where the error occurred. This is
a defect in the SRAM (IC9) or a solder defect between the CPU (IC7) and
the SRAM (IC9).
fig.error-2
• This indicates a failure to read the flash memory. This is a defect in the
flash memory (IC8) or a solder defect between the CPU (IC7) and the
flash memory.
fig.error-3
• This indicates a failure in reading or writing to the gate-array register.
This is a defect in the gate array (IC6) or a solder defect between the CPU
(IC7) and the gate array.
fig.error-4
• This indicates that the chip ID could not be read. This is a defect in MR3
(IC10) or a solder defect between the CPU (IC7) and MR3.
fig.error-5
• This indicates a failure to access the IRAM. This is a defect in MR3 (IC10)
or a solder defect between the CPU (IC7) and MR3.
fig.error-6
• This indicates a problem in the battery detection circuit. This is a defect in
R131, R132 or a solder defect of the CPU (IC7).
