About Replace The Microprocessor With A New One; Version Upgrade Procedure Of Firmware - Denon DHT-391XP Service Manual

ABOUT REPLACE THE MICROPROCESSOR WITH A NEW ONE

When replaced of the U-PRO (Microprocessor) or the Flash ROM, confirm contents of the following.
PWB Name Ref. No.
DIGITAL IC91 T5CN5
DIGITAL IC82 ST25VF080B-50-4C-S2AF
After replaced
A : Mask ROM (With software). No need write-in of software to the microprocessor.
B : Flash ROM (With software). Usually, no need write-in of software. But, when the software was updated, you should be
write-in of the new software to the microprocessor or flash ROM. Please check the software version.
C : Empty Flash ROM (Without software). You should be write-in of the software to the microprocessor or flash ROM.
Refer to "Update procedure" or "writing procedure", when you should be write-in the software.

VERSION UPGRADE PROCEDURE OF FIRMWARE

1. Preparations
-Before starting the operation-
(1) Personal Computer (Installed "BootTool_M330(Writing program).exe").
(2) RS-232 cable (9P (Male), Straight).
(3) 8U-210100S Writing Kit.
(4) 606050028012P / 7P FFC(1.0) L=240.
-Connection of the AV receiver-
(1) Confirm the power on/off switch of the AV receiver is turning off.
(2) Connect the update terminal of AV receiver with the "Writing Kit".
(Refer to figure below for the connection of the 7P FFC cable.)
(3) Connect the RS-232C cable from PC with the "Writing Kit".
1 pin
7P FFC Cable
Description
7P FFC Cable
Writing Kit
This side is contacts of
7P FFC Cable.
After
replaced
B SOFTWARE: Main
B SOFTWARE: DSP ROM
S706-709 : HIGE
RS-232C Cable
15
Remark
S702 : 3.3V
PC