21
KDC-BT6544U/BT6544UY
/BT7043U/BT742U
ROM DATA TRANSFER PROCESSES
Turn power on.
Press and hold the [1] and [3] keys and 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 READ)
Press
[ ]
key for 1 second or longer. (Data transfer)
FRONT-
END (A48x)
E2PROM
E2PROM
(IC300)
SYSTEM
μ
-COM (IC302)
Mother unit (X34-)
.
The system
μ
-COM (IC302) copies
the data in the front-end (A48x) in the
E2PROM on the mother unit (X34-)
READ OK
In case of [2]
In case of [1] or [3]
R-OK
READ OK2
R-O2
Press
[ ]
key. (Exit ROM data transfer mode.)
Turn power off.
Remove front-end (A48x).
FRONT-
END (A48x)
E2PROM
(IC300)
SYSTEM
μ
-COM (IC302)
Mother unit (X34-)
;
Install new front-end (A48x).
No ROM correction or other data status.
FRONT-
END (A48x)
E2PROM
E2PROM
(IC300)
SYSTEM
μ
-COM (IC302)
Mother unit (X34-)
=
Turn power on.
Press and hold the [1] and [3] keys and press reset button.
(Enter the system in the test mode.)
Press [B.BOOST] key. (Start transferring ROM data.)
Press
[
]
(or
[
]
.) (Select WRT)
Press
[ ]
key for 1 second or longer. (Data transfer)
FRONT-
END (A48x)
E2PROM
E2PROM
(IC300)
SYSTEM
μ
-COM (IC302)
Mother unit (X34-)
B
System
μ
-COM (IC302) copies
data on the mother unit (X34-) into
E2PROM in the front-end (A48x)
WRT OK
In case of [2] or [3]
In case of [1]
W-OK
WRT OK2
W-O2
Press
[ ]
key. (Exit ROM data transfer mode.)
