CFD-E55L (serv.man2) - Sony Audio Service Manual (repair manual). Page 2

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The supplied boards are all type C, and therefore if the board is
replaced, use the board of type C only whichever model is ser-
viced.
However, on the type C model, the number of pins of connectors
that connect MAIN board to CD board, and MAIN board to
POWER board has been changed, and accordingly the type C is
not interchangeable with type A and B respectively.
Therefore, if even one of MAIN, CD, and POWER boards is re-
placed, replace all three boards simultaneously.

Identify each type from the part number printed on each board by
referring to the following table.
Also, each board is common to type A and type B, but routing of
speaker lead wires is different. For details of different places, re-
fer to “4. Diagrams 4-1. Change the Routing of Speaker Lead Wires
(TYPE B) and correction (Type A, B)” (page 9 and 10).

Type A, B

Type C

Board

Part No.

BATT (+)

1-675-541-11

1-677-328-11

BATT (–)

1-675-542-11

1-677-329-11

CD

1-675-534-11

1-677-321-11

CD MOTOR

in common to all types

KEY 1

1-675-537-11

1-677-323-11

KEY 2

1-675-538-11

1-677-324-11

KEY 3

1-675-539-11

1-677-325-11

LCD

1-675-536-11

1-677-326-11

LED 

*

1

999-11

332-11

MAIN

1-675-533-11

1-677-320-11

POWER

1-675-535-11

1-677-322-11

REC SW

1-675-540-11

1-677-327-11

*1) For the LED board, only the lower five digits of part number

is printed.