I would be most grateful if you could help me with myu GEONAV 7C which suddenly has given me an error code : 0x4000091. Thank you. Thank you

https://www.youtube.com/watch?v=hKiUqu_Inig

Video about Wide Net Code error

Glad to HELP YOU!

You have HERE a list of ALL MANUALS (scroll down until you will see your 7c product) and just HERE the manuals for a SIMPLE 7C RADIO TRANSMITTER (as you have indicated in your post).

My best wishes!

7C is a drum error. Try and replace the DR-400 drum unit along with a new toner cartridge.

It would appear you need to perform a hardware reset.

6.2 Resetting the System
Three types of reset are available for the Chartplotter:
• Power-On Reset: When you turn the display unit off, then on again,
the screen reverts to the chart display with all windows cleared.
• Hardware Reset: This procedure enacts a power-on reset if the unit
has entered a lock-up condition.
To perform a hardware reset, press and hold the POWER key for 9
seconds.

Hope this helps.
Good Luck!

00 = C2 B5 BE 41 0D 9B C5 7C
01 = 8E 80 D7 EF 44 93 02 2B

Enjoy!!

worst case scenerio is your engine board has gone bad. first though, try a new brother brand DR400. a faulty/binding drum unit can cause this. usually happens with generic brands.

hth,
razors

27Nov ex Cw.

00= 6B 77 17 7C 6D 2C AC 92
01= A5 5F 0A 63 A5 8F 15 8D

the new telewest codes are as follows

00...a8 7c 45 dc 5b 92 44 f6
01...86 60 f1 21 1a 3d c9 c3

have fun..........

here is the manual

http://www.retrevo.com/s/brother+4100+manual

Hi Alexandra,
I hate to be the messenger of bad news but Machine Error 7C mean Engine PCB Error. This error code is for servicer reference and may not appear on the service manual. If it does, it will tell you to unplug the unit and try again. If the problem persists, you have to bring it to an Authorized Brother Service center for repair.

The link below will take you to a Service Manual page where the error code is defined.
http://tinyurl.com/yvcv35

Best Regards,