Verifying The Version; Data Backup And Restore Operations; Performing A Factory Reset; Updating The System - Roland BOSS AD-2 Service Notes

Nov. 2015

Verifying the Version

Perform verification in the Test mode.
Data Backup and Restore
Operations
This product cannot save user data. Backing up user data during
servicing is not required.

Performing a Factory Reset

This product has no factory-reset feature.

Updating the System

A system update cannot be performed for this product. If an update is
required, replace with an updated circuit board. Update of the circuit
board can be accomplished only at the factory.

Test Mode

Items Required
• AC adaptor (PSA-series device)
• Amp-equipped monitor speaker x 1
• Oscillator x 1
• Oscilloscope x 1
• Noise meter x 1
• 1/4-inch phone plug with 10-kΩ load resistor
• 1/4-inch monaural phone cable (1/4-inch monaural phone plug <–>
1/4-inch monaural phone plug)
• Monaural cable (1/4-inch monaural phone plug <-> RCA phono plug)
• Y cable (1/4-inch stereo phone plug <-> RCA phono plug x 2)
• Conversion plug (RCA phono jack –> 1/4-inch monaural phone plug)
• Tester
• Current-consumption measurement tool
fig.check-cable.eps
10
Inspection Items
1. Version Confirmation (p. 10)
2. Measurement of Current Consumption (p. 10)
3. Volume and AD/DA Test (p. 11)
4. Noise Test (p. 11)
5. Bypass Test (p. 12)
6. LED and Battery Operation Test (p. 12)
Some items involve testing while in the test mode, and others involve
testing in the normal usage state. For detailed information, refer to the
procedures for the respective test items described later in this document.
Entering the Test Mode
1.
Set each knob as shown below.
AMBIENCE: Minimum
ACOUSTIC RESONANCE: Minimum
NOTCH: Maximum
2.
Hold down the pedal and insert a 1/4-inch monaural phone plug into the
INPUT jack.
The power comes on and CHECK LED lights up, and after approximately
two seconds, the CHECK LED flashes and the unit enters the test mode.
Quitting the Test Mode
After entering the test mode and displaying the version, depress the
pedal. Alternatively, disconnect the plug from the INPUT jack to switch
off the power.
1. Version Confirmation
When the unit enters the test mode, the CHECK LED flashes, and the
number of flashes indicates the version.
Examples: Blinks one time:
Blinks two times:
Blinks three times: Ver. 1.02
2. Measurement of Current Consumption
1.
Use the current-consumption measurement tool to connect the AC
adaptor and the tester.
2.
Connect a 1/4-inch monaural phone cable to the OUTPUT jack.
3. Hold down the pedal and connect another plug of the cable in step 2 to
the INPUT jack.
The unit starts up in the test mode.
fig.test-1-e.eps
PSA-
Tester
ADAPTOR
4.
Verify that current consumption is 50 mA or lower.
AD-2
Ver. 1.00
Ver. 1.01