Test Mode - Roland DB-700UT Service Notes

DB-700

TEST MODE

♦
Tools required
• Foot switch:FS-5L 3 units (used in Test 3)
• Connection cable for FS-5L:standard (to CHORUS),
2-mono/1-stereo (to TIP & RING) (used in Test 3)
• Standard plug:1 (to PHONES, used in Test 4)
♦
Setting for test
Panel controls
AMPLIFIER TYPE: SOLID STATE
Other control knobs: Full counterclockwise
SHAPE: OFF
Connect foot switches:
to TIP: A/B - set POLARITY switch on the FS-5L to the Jack
side. FS-5L should light its LED when it is off.
to RING: MANUAL - set POLARITY switch on the FS-5L to
the Jack side. FS-5L should light its LED when it is off.
to CHORUS - set POLARITY switch on the FS-5L to the
side opposite to Jack. FS-5L should light its LED when it is
on.
♦
Function of LEDs in the test mode
The following LEDs express numbers.
Figure MANUAL
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
The POWER INJECTION LED shows the test results:
OK - lights in green (except in test 1.3)
NG - lights in red
♦
Entering the test mode
While holding down the buttons MANUAL, (MEMORY) A
and B, press the POWER button.
Upon entering the test mode, all LEDs blink.
1 LED, program version, bus
1.1 LED
Press the MANUAL button, the LEDs MANUAL, A
(MEMORY), B, WRITE and CHORUS turn on and off
in that order and repeat the cycle.
1.2 Program version
Press the WRITE button. The following LEDs show the
program version number.When Ver.1, for example, the
WRITE LED lights, as shown in the table below.
LEDs showing Ver.1
MANUAL A
8
LED
A B WRITE
: on
: off
LED
B WRITE
1.3 CPU bus & DSP bus
Press the MANUAL button. The LEDs MANUAL, A, B
and WRITE blink in that order indicating that the CPU
bus and then DSP bus are being tested. When these
LEDs are all blinking, test is completed and the
following LEDs show the test result.
OK: POWER INJECTION LED lights in red and WRITE
LED lights
NG: POWER INJECTION LED lights in red. The defective
device is indicated by the lighting LED as shown in the
table right.
NG
SRAM
DSP
EEPROM
1.4 POWER INJECTION LED
Repeatedly press the WRITE button and verify that the
POWER INJECTION LED changes its color.
Orange → Red → Green
Press the WRITE button to proceed to the next test.
2 Tact switches
The LEDs shown right indicate the test number.
Test No.2
MANUAL A
Press the WRITE button when skipping this test. Otherwise,
press the MANUAL button to start the test.
Press the MANUAL, A, B and WRITE buttons in that order
and verify that the LED on the button lights.
Upon pressing the WRITE button, POWER INJECTION
LED should light in green.
Press the WRITE button to proceed to the next test.
3 Foot switches
The LEDs shown right indicate the test number.
Test No.3
MANUAL A
Press the WRITE button when skipping this test. Otherwise,
press the MANUAL button to start the test.
MANUAL → A/B → A CHORUS
Depress the foot switches connected to MANUAL, A/B and
CHORUS sockets in that order. Observe the following LEDs
that should light upon depressing the corresponding foot
switch.
Foot switch LED
MANUAL MANUAL
A/B A
CHORUS B
Upon depressing the CHORUS, the POWER INJECTION
LED should light in green to show that the all foot switches
operate correctly.
Press the WRITE button to proceed to the next test.
May. 2000
Lighting LEDÅ^LEDì_ìî
MANUAL
A
B
LED
B WRITE
LED
B WRITE