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Aiwa AM-F72 /F75 /F80 No Adjust!

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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:
AM-F72.JPG

ps. sorry for my english

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I have uploaded the contents of EEPROM memory from a good player (AM-F80) into a damaged player (AM-F75), the equipment began to play the disc.

After replacing EEPROM memory is necessary adjust laser power:

Procedure:

1) Starting Adjustment Mode

Turn on "SYNCHRO" switch and short the testland of the main circuit board. Then press "RESET". Once Adjustment Mode is started, LCD will be all turned on to display [ADJ MODE].

Board_test_land.png

* READ POWER ADJUSTM ENT

Press "DSL" key once to increase one grade of a level meter. Check the voltage between Test Points PD-GND with a digital multi meter. Use "ENTER" "SEARCH" to set digital multi meter display at 105±6mV.

* WRITE POWER ADJUSTMENT

Press "DSL" key twice to increase the grade of the level meter to the maximum. Check the voltage between Test Points PD-GND with a digital multi meter. Use "ENTER" "SEARCH" to set digital multi meter display at 810±6mV.

Display_laser_power.png

 

ps. sorry for my english

dump EEPROM from working AM-F80 (binary format):

dump_AMF80.zip

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