Принтер Samsung ML-3310D b SCX-4833FD

Здравствуйте.

Принесли после неудачной прошивки два вышеуказанных предмета.
3310
При включении горят все знаки, ЭКО, ошибка и замятие.
Шили чем неизвестно.
Я шил и 25 и 33. Оригинальные, и фикс.
Результат один и тот же.
Лог.
Reset Target and Run Flash Writing Program Again

Boot&Mon. CheckSum OK!

[SFLASH_InitFLASH][NG]

[ WATCH DOG RESET Booting... ]
Press any key to execute Monitor Program within 1 sec...
Kernel Data Read Start From Serial Flash
Kernel Data Read End
New kernel was found...
CHKSUM
{
check sum start address : 42000000, count : 002A0000
check sum : 0000FDFE
} /* Checksum End
Checksum Fail!!, original checksum = 0x0000A5A5, checksum = 0x0000FDFE
CHKSUM
{
check sum start address : 40060000, count : 00015FFE
check sum : 0000A5A5
} /* Checksum End
Checksum OK!!
finish copy image to the RAM
===> Now program restarted on the RAM to program flash
jump to 0x40060000
Flash Data Download Address : 0x43000000
===============================

Start flash_writer

===============================

verify_Image : 0x43000000

i_header->pul_start_addr : 0x00000000

i_header->ul_count : 0x00000000

model : 0x00000000

flash type : 0x00000000

image type : 0x00000000

temp_buf :

SIG : $IMG

Can not find sig

----------- Display Dcache Status ------------

Control register = 0x000510F8

Icahe : ON

Dcahe : OFF

MMU : OFF

Download Image from PC

{

Ready to download from Parallel/Usb/Serial (0x43000000)

-------------------------

Samsung OTG, 2006

Link ID : [4F54260A]

-------------------------

Drv "design ware core" USB download

Image includes PJL(0000001B) -> Waste 80 bytes

[[7864424 Bytes received]] - Complete Downloading

} /* Download End */

verify_Image : 0x43000000

i_header->pul_start_addr : 0x00000000

i_header->ul_count : 0x00780000

model : 0x03000042

flash type : 0x00010002

image type : 0x00000000

temp_buf : $IMG

SIG : $IMG

FlashCheckSum

{

check sum start address : 43000018, count : 00780000

check sum : 0000A5A5

} /* Checksum End

Source Checksum is valid

Boot image!

Version : -17

This is not a valid image.!!!!

Downloaded Image is not Valid

Reset Target and Run Flash Writing Program Again

Boot&Mon. CheckSum OK!

[SFLASH_InitFLASH][NG]

[ WATCH DOG RESET Booting... ]

Press any key to execute Monitor Program within 1 sec...

Kernel Data Read Start From Serial Flash

Kernel Data Read End

New kernel was found...

CHKSUM

{

check sum start address : 42000000, count : 002A0000

check sum : 0000FDFE

} /* Checksum End

Checksum Fail!!, original checksum = 0x0000A5A5, checksum = 0x0000FDFE

CHKSUM

{

check sum start address : 40060000, count : 00015FFE

check sum : 0000A5A5

} /* Checksum End

Checksum OK!!

finish copy image to the RAM

===> Now program restarted on the RAM to program flash

jump to 0x40060000

Flash Data Download Address : 0x43000000

===============================

Start flash_writer

===============================

verify_Image : 0x43000000

i_header->pul_start_addr : 0x00000000

i_header->ul_count : 0x00000000

model : 0x00000000

flash type : 0x00000000

image type : 0x00000000

temp_buf :

SIG : $IMG

Can not find sig

----------- Display Dcache Status ------------

Control register = 0x000510F8

Icahe : ON

Dcahe : OFF

MMU : OFF

Download Image from PC

{

Ready to download from Parallel/Usb/Serial (0x43000000)

-------------------------

Samsung OTG, 2006

Link ID : [4F54260A]

-------------------------

Drv "design ware core" USB download<0>

Boot&Mon. CheckSum OK!

[SFLASH_InitFLASH][NG]

[ POWER ON Booting... ]

Press any key to execute Monitor Program within 1 sec...

Kernel Data Read Start From Serial Flash

Kernel Data Read End

New kernel was found...

CHKSUM

{

check sum start address : 42000000, count : 002A0000

check sum : 0000FDFE

} /* Checksum End

Checksum Fail!!, original checksum = 0x0000A5A5, checksum = 0x0000FDFE

CHKSUM

{

check sum start address : 40060000, count : 00015FFE

check sum : 0000A5A5

} /* Checksum End

Checksum OK!!

finish copy image to the RAM

===> Now program restarted on the RAM to program flash

jump to 0x40060000

Flash Data Download Address : 0x43000000

===============================

Start flash_writer

===============================

verify_Image : 0x43000000

i_header->pul_start_addr : 0x00000000

i_header->ul_count : 0x00000000

model : 0x00000000

flash type : 0x00000000

image type : 0x00000000

temp_buf :

SIG : $IMG

Can not find sig

----------- Display Dcache Status ------------

Control register = 0x000510F8

Icahe : ON

Dcahe : OFF

MMU : OFF

Download Image from PC

{

Ready to download from Parallel/Usb/Serial (0x43000000)

-------------------------

Samsung OTG, 2006

Link ID : [4F54260A]

-------------------------

Drv "design ware core" USB download

На обоих присутствует ошибка "original checksum = 0x0000A5A5".

Прошивки оригинальные и проверенные на других аппаратах.
Подскажите кто знает в чем проблема, и какие пути ее решения.

Перенес в Ремонт принтеров, ксероксов, факсов и т.п.
maco