Kenwood KDC-MP408U Service Manual page 19

4. In case of applying a new ROM correction when front-
end (A1) is replaced (There is ROM correction data.)
5. In case of applying a new ROM correction even when
front-end (A1) is not replaced.
Mother unit (X34-)
FRONT-
END (A1)
E2PROM
Install new E2PROM. (E2PROM that has been updated with
ROM correction)
Mother unit (X34-)
FRONT-
END (A1)
E2PROM
ROM DATA TRANSFER PROCESSES
SYSTEM
μ-COM (IC1)
ROM correction
Tuner adjustment
Other
E2PROM circuit pattern
SYSTEM
μ-COM (IC1)
E2PROM
KDC-MP408U/MP438U/X492/MP5039U/MP5539U/W5041UA/
W5041UG/W5141UAY/W5141UGY/W5541U/W5641UY
Turn power on.
Press and hold the [1] and [3] keys, press reset button. (Enter
the system in the test mode.)
Press [B.BOOST] key. (ROM data System enters data trans-
fer mode.)
Press (or .) (Select WRT)
[ ] [ ]
Press key for 1 second or longer. (Data transfer)
[ ]
Mother unit (X34-)
FRONT-
END (A1)
E2PROM
System μ-COM (IC1) copies
the ROM correction data on the
mother unit (X34-) into E2PROM
in the front-end (A1)
WRT OK1
In case of [4]
Press (or .) (Select READ)
[ ] [ ]
Press key for 1 second or longer. (Data transfer)
[ ]
Mother unit (X34-)
FRONT-
END (A1)
E2PROM
System μ-COM (IC1) copies
data in the front-end (A1) into the
E2PROM on the mother unit (X34-).
(ROM correction and other data)
READ OK
SYSTEM
μ-COM (IC1)
E2PROM
W-O1
In case of [5]
Press [ ] key. (Exit ROM
data transfer mode.)
SYSTEM
μ-COM (IC1)
E2PROM
R-OK
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