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Apply [9. Procedure for Checking Mechanism Control P.C.B., LCD P.C.B., Headphone/P-MD P.C.B., and USB P.C.B.] under [9. Disassembly and Main Component Replacement Procedures before Operation Checks].
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Remove 4 screws from the mechanism unit to disassemble. (Refer to [9.3. Procedure for Replacing Pinch Roller (JUN) and Head Block (Cassette Mechanism Unit)] under [9. Disassembly and Main Component Replacement Procedures before Operation Checks].
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Connect the headphone jack output jig (cf. Fig. 8) to headphone jack.