
13
EV-204 / EV-205
INSPECTION
1. Preparation
To check the unit, following jigs are required.
• Headphones
• Guitar Amplifier
• Battery (6F22Y or 6LR61)
Set each control as follows.
• Master Volume: Maximum
• [VOLUME] knob: Center
• MODE select switch: DIRECT
• Pickup Level Controls: See P.5 CONTROL PANEL Side , .
2. Inspection Procedure
2-1 Connect a guitar amplifier to {LINE OUT] jack.
2-2 Touch strings with a finger, and confirm that the hum noise decreases.
2-3 Play strings with a finger, and confirm the following items.
• Each string sounds normally.
• The fluttering noise is not produced.
• Each string has almost the same sound volume.
2-4 Confirm that the sound becomes larger according as turning the MASTER VOLUME knob to right, and that the
sound becomes smaller according as turning to left.
After finishing this test, set the MASTER VOLUME knob to maximum.
2-5 Set the MODE select switch to 'CONTROLLED'.
2-6 Play strings with a finger, and confirm that each string has almost the same sound volume.
2-7 Connect headphones to [PHONES] jack.
2-8 Play strings with a finger, and confirm that the sound level from headphones is large enough.
2-9 Play strings with a bow, listen to sound from the guitar amplifier, and confirm the following items.
• The sound has a normal volume and tone.
• The fluttering noise or mechanical noise are not produced.
To finish the inspection, set each control as follows.
• MASTER VOLUME: Maximum
• [VOLUME] knob: Minimum
• MODE select switch: DIRECT
POINTS TO CHECK WHEN NOISE HAS OCCURED
When a flattering noise or mechanical noise is produced, adjust the
tailpiece wire as follows.
Pull the tailpiece wire with a screw driver which is 7mm in
diameter so that the length of the tailpiece wire measures up to
about 38mm as shown in the illustration. (Fig.1)
Then confirm that the volume assembly is settled in the hole of the
sound plate and it dose not touch the sound plate.
If the above conditions are not met, fine adjust the length of
tailpiece wire.
About 38mm
(Fig. 1)
7mm Driver