Casio CDP-130 Service Manual & Parts Manual page 23

<Kinds of hammers>
There are several kinds of hammers. The type of a hammer may be identifi ed by the code
engraved on it.
Hammer Code (for a white key)
Hammer Code (for a black key)
Type of Hammer: "W" for a white key, "B" for a black key.
Hammer Code: The hammers for white keys are coded W1, W2, W3, and W4.
The hammers for black keys are coded B1, B2, B3, and W4.
<Location to install the hammer>
A hammer must be installed at the correct location according to its type. The combination of
hammers and keys are shown below.
B1 (9 keys)
W1 (13 keys)
Type of Hammer (for a white key)
<Hammers for black keys>
B2 (9 keys) B3 (9 keys)
W2 (13 keys) W3 (13 keys)
<Hammers for white keys>
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Type of Hammer (for a black key)
B4 (9 keys)
W4 (13 keys)
CDP-130