Sony TC-K555ES Service Manual page 4

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Caution on DOLBY IC (CX174) Replacement
This set uses eight Dolby ICs (CXI74). (lCIOI,
102,201,202,301,302,401,402)
These ICs are either CX 174-1 or CX-174-3.
When replacing these ICs, be sure to use the same
ICs as the original one.
SONY
174 -
1 :CX174·1
3 :CX174-3
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