Kenwood KDC-138/138CR Service Manual page 17

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.
q
Mother unit (X34-)
FRONT-
END (A1)
E2PROM
Install new E2PROM. (E2PROM that has been updated with
ROM correction)
w
Mother unit (X34-)
FRONT-
END (A1)
E2PROM
ROM DATA TRANSFER PROCESSES
ROM correction
Tuner adjustment
Other
E2PROM circuit pattern
E2PROM
KDC-138/138CR/139/139S
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
transfer mode.)
Press [ ] (or [ ].) (Select WRT)
Press [ ] key for 1 second or longer. (Data transfer)
e
Mother unit (X34-)
FRONT-
END (A1)
E2PROM
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
READ OK
E2PROM
W-O1
In case of [5]
Press [ ] key. (Exit ROM
data transfer mode.)
E2PROM
R-OK
17