Kenwood KDCMP 238 Service Manual

Page 16

KDC-MP208/MP238/MP2380R/MP239
KDC-MP3039/MP339/MP339S/MP439

ROM DATA TRANSFER PROCESSES

16

When replacing front-end (A1) of mother unit (X34-), or when
adding or replacing ROM correction (program correction with
ROM IC (IO10)), the following activities are required.

I Overview

When replacing front-end (A1) in the model where ROM
correction and security data have been written into
E2PFIOM, included in the front-end (A1) pack, the transfer
function of the E2PROM data itself in the replaced front-end
(A1) is required.

This function in the above system configuration is used
to allow for complete replacement of the front-end at any
service center.

I Overview of specifications

Procedures for replacement are as follows: To install the
EZPROM to the mother unit (X34-), and replace front-
end (A1) with new front-end after copying the data in the
E2PROM (such as ROM correction data and other data) in
the front-end (A1) to the mother unit (X34-) by operating the
system, and then copy the data (such as ROM correction
data and other data) into the mother unit to the E2PFIOM of
the front-end (A1), operating the main body.

Tuner adjustment data was inserted during the tuner pack
manufacturing, and data will not be transferred because
front-end (A1) is built-in.

In addition. tuner adjustment data for new front-end (A1) is
supplied as a service part in which data was inserted.

I Data to be copied
- ROM correction data
- Other data
Security data
DEMO MODE ON/OFF status
POWER ON time (For maintenance)
Playback time (For maintenance)
EJECT count (For maintenance)
Panel open/close count (For maintenance)
CD l2C status (For maintenance)
CD offset error code (For maintenance)
CD sound skips count (For maintenance)
CD time code not updated count (For maintenance)
CD load switch errors count (For maintenance)
CD ejection errors count (For maintenance)
DC offset error (For maintenance)
Forced Power OFF information (For maintenance)
Serial number (For maintenance)
E2PROM data check data (For internal check)

I Operation procedure

Operation procedure is different depending on the conditions.
Proceed with the appropriate operation procedure depending
on the specific condition.

1. In case of replacing front-end (A1) without an applicable
ROM correction.

2. In case of replacing front-end (A1) with an applicable
ROM correction.

3. In case of applying new ROM correction at the same time
when front-end (A1) is replaced. (No ROM correction has
been carried out.)

(D
Mother unit (X34-)
SYSTEM
FRONT- urCOM (IC1)
END (A1) I
EZPROM EZPROM
A

E2PFIOM circuit pattern

Install new E2PROM.

Install E2PFIOM containing no data, in case of [1] and [2].

In case of [3], install maintenance E2PROM with an applicable
ROM correction program.

@
Mother unit (X34-)
SYSTEM
FRONT- (1700M (IC1)
END (A1)
EZPROM EZPROM

Page 17

KDC-MP208/MP238/MP2380R/MP239
KDC-MP3039/MP339/MP339S/M P439

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

transfer mode.)
Press [I44] (or [>>I] .) (Select READ)
Press [NI] key for 1 second or longer. (Data transfer)

(3)

Mother unit (X34-)

SYSTEM
FRONF ucomucn
END(AU
EZPROM Ilfl E2PROM

The system u-COM (IC1) copies
the data in the front-end (A1) in the
E2PROM on the mother unit (X34-)

In case of [2]

HEAD OKA R-OK A

In case of [1] or [3]

HEAD 0K2 R-02
, ,

Press [HI] key. (Exit ROM data transfer mode.)
Turn power off.

Remove front-end (A1).

(3)

Mother unit (X34-)

SYSTEM

FRONF wCOMUCfl

END(A1) I
E2PROM

G

Install new front-end (A1).
No ROM correction or other data status.

(5)

Mother unit (X34-)

SYSTEM
FRONF wCOMUCU
END(A1) I
EszOM E2PROM

G

Turn power on.

Press and hold the [t] and [3] keys and press reset button.
(Enter the system in the test mode.)

Press [B.BOOST] key. (Start transferring ROM data.)

Press [144] (or [>>|] .) (Select WRT)

Press [>II] key for 1 second or longer. (Data transfer)

(6)

Mother unit (X34-)

SYSTEM
FRONF uCOMUCU

END(A1) I

EZPROM .ll E2PROM

II

System wCOM (I01) copies
data on the mother unit (X347) into
EZPROM in the frontend (A1)

In case of [2] or [3]

. .

In case of [1]

. .

Press [NI] key. (Exit ROM data transfer mode.)

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