Kyocera 2J0-008 error F050 free download

File name 2J0-008 error F050.pdf

Service Bulletin SB Number: SB 2J0-008 Creation Date: 03/06/2010 Subject: Error code F050 due to Macronix flash memory FS-2000D/3900DN/4000DN/6950DN/2020D/3920DN/4020DN/ Model: 6970DN Phenomenon The commonly used Spansion flash memory at the high-voltage board has become difficult to obtain, therefore we changed the common type to Macronix flash memory. Due to the above mentioned change, error code F050 (Engine PWB ROM checksum error) may be displayed after turning on the main switch. The above mentioned error can not be cleared by turining the main switch OFF and ON. Cause The CPU may stall due to garbled read-out of the data from the Macronix flash memory, when the power goes down at the power-off process due to the variation of the functional low voltage of the flash memory. When the CPU stalls, the data may be incorrectly written to the flash memory. Under this condition part of the program in the flash memory may disappear and therefore start up failure may occur when the main switch is turned ON. Solution The engine high voltage board has been changed as follows: 1. The voltage of the reset IC (U5) has been changed from 3.9V to 4.2V. 2. The capacity of the chip capacitor (C14) has been changed from 0.1 microF to 0.01 microF. (FS-2020D/3920DN/4020DN/6970DN only) Parts No. Old Parts New Parts Description Q'TY Interchange- SP No. No. ability Old New Old New 1 302F801422 302F801423 P.W.BOARD ASSY ENGINE WITH 1 1 O O O 2F801422 2F801423 SOFTWARE (SP) (For the FS-2000D) 2 302F901162 302F901163 P.W.BOARD ASSY ENGINE WITH 1 1 O O O 2F901162 2F901163 SOFTWARE (SP) (For the FS-3900DN) 3 302GA01162 302GA01163 P.W.BOARD ASSY ENGINE WITH 1 1 O O O 2GA01162 2GA01163 SOFTWARE (SP) (For the FS-4000DN) 4 302J080010 302J080011 P.W.B ASSY ENGINE WITH SOFTWARE 1 1 O O O 2J080010 2J080011 (SP) (For the FS-2020D) 5 302J180010 302J180011 P.W.B ASSY ENGINE WITH SOFTWARE 1 1 O O O 2J180010 2J180011 (SP) (For the FS-3920DN) 6 302J280010 302J280011 P.W.B ASSY ENGINE WITH SOFTWARE