Note: Most of the content described in this article refers to more than 80 bass accordions. In case of other specifications can be controlled according to specific circumstances.

(A) rolling key: the black key, white button is not pressed or not by self-ming

cause: 

1, sound hole cover and the adjacent parts of the collision was jammed or a small garbage debris and other pad, causing lax;

2, sound hole cover leather deformation, degumming, stiff or uneven position, does not match the leak;

3, white key deformation with the key to rubbing the key or the root of the spring off, broken off.

Repair method: the decorative cover on both sides of the screw twist to remove the decorative cover, check the cause of the malfunction, with bamboo chopsticks head cut into oblique flat (see Figure 1), as a tool to remove the key, and then into the spring The lower part of the opening of the circle, a little hard to press down to make the spring off the hook out the key. According to the above reasons for a careful examination, to give symptomatic repair.

(B) the bass button can not press or do not press

cause: 

1, bass keys and bacon holes are not stuck, or internal top pieces and other transmission parts collided;

2, sound hole cover leather deformation, degumming, stiff or uneven position, does not match the leak;

3, sound hole cover to start the spring off, broken or garbage debris stuck.

Repair method: the bass belt belt loose and screw off, remove the floor, you can carefully check, find the reason. Then, the bass frame on both sides of the clip out of the open, remove the tightening screw, you can remove the entire bass rack, and then further check the sound hole cover is normal. When loading and unloading should pay attention to the abdomen has two rows of mandrel, before and after the two rows of 12, each should be kept in place, press the hand, According to the original order. When installing the bottom plate, the vent button should be inserted into the hole.

(C) consumption of wind

cause:

1, on the piano box or under the piano box sound hole cover is not completely cover the sound hole, or not flat to cover the sound hole, resulting in leakage;

2, due to climate change, causing the bellows wooden frame deformation, resulting in bellows and piano junctions, resulting in leakage;

3, due to improper use or maintenance, so that the bellows perforation, resulting in leakage.

Repair method: If the sound hole cover problem, you can refer to (a), (b) the operating method is the connection leakage, with pliers pull out the pin, in the bellows box concave parts, fill with paper, or paste more Thick leather, so that the bellows and piano box flat tight connection, the case of bellows perforation, the light can be placed into the wind box body irradiation, see where the hole, and then use a thin airtight material paste hole, re-use.

(D) sound does not ring, sand sound, noise, sound and so on

cause:

1, the reed after long-term use, resulting in elastic attenuation or for a long time not damp rust;

2, the gap around the gap in a small garbage to block or with the spring frame hole wall rub;

3, spring around the sticky wax loose or loose piston deformation of the piston;

4, the winter temperature gap is large, due to the spring frame and reed material shrinkage coefficient is different, there will be a temporary hoarse voice.

Repair method: first of all to determine that a key of the sound are not allowed, and then pull the right handcuffs with pliers all the plug before and after, (left piano box before and after the bolt, the general situation do not pull), the piano box and bellows Open, remove the internal sound slot, according to the above reasons, carefully check, give symptomatic repair or correction of the pitch. All the sound is too low, can be used in the reed head with thin metal sheet (such as: food cans scrap iron or plastic hard film), cut into the size of the fingers, the mouth around the mouth file smooth as knife, the sheet into the The back of the reed, with the assised file in the reed head file to some, if the sound is too high, can be in the reed root (that is, one end of the rivets) file to go, regardless of file height or file low, File, be careful not to file a file too much.

Reed there is the film in the film of the points, all the bellows when the direction is pulled in the film, pushing the direction of the film is the outer film. The pitch has the basic sound (ie, the standard sound) and the wave of the sound (that is, the sound, the tremolo) of the points, all the name of the stamp on the side of the reed is the basic sound, in the piston leather side of the wave (pitch slightly higher than Basic sound).