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Hi, in memoriam No Adjust! - In this case, it means the contents of the EEPROM is damaged. Before the error "no adjust" occurs, You can copy the contents of EEPROM. When an error occurs, you can upload the memory dump to the chip. EEPROM: IC302 Seiko Instruments S-93C46AMFN Buffer content from address: 00000000h, to address: 0000003Fh memory for user settings and adjust settings Programmer: Elnec BeeProg+ BAT300, battery backup (3V ML614 rechargeable lithium battery) is only for Real Time Clock cross-reference: Panasonic EECEN0F204RK http://www.tme.eu/en/details/eec-en0f204rk/supercapacitors/panasonic/eecen0f204rk/ Caution: Connect an AC adapter after replacing battery, and leave the unit for more than 8 hours. Dump from AM-F72 (No Adjust!) 0000000000 8212 B2B4 8C04 A20A 04A2 CA2C 0050 D8C0 0000000008 ACA8 116C 601E E0DF 3800 E020 797E 0000 0000000010 0B0A 00F0 FFFF FFFF FFFF FFFF FFFF FFFF 0000000018 FFFF FFFF FFFF FFFF FFFF FFFF FFFF FFFF 0000000020 FFFF FFFF FFFF FFFF FFFF FFFF FFFF FFFF 0000000028 FFFF FFFF FFFF FFFF FFFF FFFF FFFF FFFF 0000000030 2AD0 E8F0 E0B0 E0B0 E0F0 0C0C 0C0C 0000 0000000038 0000 0080 0010 D002 0000 0000 0000 0008 Dump from AM-F75 (working) 0000000000 8212 B2B4 8C04 A20A 04A2 CA2C 0050 D8C0 0000000008 ACA8 116C 601E E0DF 3800 E020 797E 0000 0000000010 0B0A 00F0 FFFF FFFF FFFF FFFF FFFF FFFF 0000000018 FFFF FFFF FFFF FFFF FFFF FFFF FFFF FFFF 0000000020 FFFF FFFF FFFF FFFF FFFF FFFF FFFF FFFF 0000000028 FFFF FFFF FFFF FFFF FFFF FFFF FFFF FFFF 0000000030 2AD0 E808 E088 9088 D888 74B8 24D8 0000 0000000038 7F00 8080 0010 7303 0000 0000 0000 0004 dump EEPROM from working AM-F75 (binary format): dump_AMF75.zip 30h - laser power correction temperature correction, FBIAS, RLCD: 37h - ? 38h - ? 3Dh - ? Regards, Maciek EDIT: cross-reference for IC302: 93LC46B-I/ST 2.5÷5.5V (TSSOP8) Microchip Technology http://www.tme.eu/en/details/93lc46b-i_st/serial-eeprom-memories-integ-circ/microchip-technology/ or 93AA46B-I/ST 1.8÷5.5V (TSSOP8) Microchip Technology 93AA46B-I/MS 1.8÷5.5V (MSOP) Microchip Technology 93LC46B-I/MS 2.5÷5.5V (MSOP) Microchip Technology after programming the chip (if cross-reference) must be flipped: ps. sorry for my english