Philips N4418 - UK Vintage Radio Repair and Restoration Discussion Forum

akaigxfan · 21st Feb 2016, 7:02 pm

My philips n 4418 when switching on both reels star turning really fast I press stop and the left hand reel stops but the ff button is permanently on and ff is running constantly rather annoying as it was fine when put away, any help please? Thanks.

Sideband · 21st Feb 2016, 9:56 pm

Easiest thing to try first is to clean the edge connectors of the little plug-in panels on the logic board. There are two 'flip-flop' panels plugged in to the main logic board, try these first. Also a possibility of 'tin whisker' problems in the AC126 transistors fitted to these so you may need to change them. You should be able to find AC126's quite easily.

akaigxfan · 21st Feb 2016, 10:27 pm

Hi, yes i'll do that and report back, thanks.

akaigxfan · 22nd Feb 2016, 6:45 pm

hello . wiped the flip flop boards also the speed control board, now theres a new problem it now will only pay 33/4 ips wth the speed control in 7/12 position! if i put the switch into 3/34 or 1/78 the capstan speed races up almost to fast forward speed, well at least itll work in that speed for now untill i have time to look some more, thing is all my tapes area at 7/12 speed. grr. thanks for youre help.

21st Feb 2016, 7:02 pm	#1
akaigxfan Retired Dormant Member Join Date: Jan 2012 Location: Whissonsett, Dereham, Norfolk, UK. Posts: 128	Philips N4418 My philips n 4418 when switching on both reels star turning really fast I press stop and the left hand reel stops but the ff button is permanently on and ff is running constantly rather annoying as it was fine when put away, any help please? Thanks.

21st Feb 2016, 9:56 pm	#2
Sideband Dekatron Join Date: Oct 2003 Location: Croydon, Surrey, UK. Posts: 7,580	Re: philips n 4418 Easiest thing to try first is to clean the edge connectors of the little plug-in panels on the logic board. There are two 'flip-flop' panels plugged in to the main logic board, try these first. Also a possibility of 'tin whisker' problems in the AC126 transistors fitted to these so you may need to change them. You should be able to find AC126's quite easily. __________________ There are lots of brilliant keyboard players and then there is Rick Wakeman.....

21st Feb 2016, 10:27 pm	#3
akaigxfan Retired Dormant Member Join Date: Jan 2012 Location: Whissonsett, Dereham, Norfolk, UK. Posts: 128	Re: philips n 4418 Hi, yes i'll do that and report back, thanks.

22nd Feb 2016, 6:45 pm	#4
akaigxfan Retired Dormant Member Join Date: Jan 2012 Location: Whissonsett, Dereham, Norfolk, UK. Posts: 128	Re: Philips N4418 hello . wiped the flip flop boards also the speed control board, now theres a new problem it now will only pay 33/4 ips wth the speed control in 7/12 position! if i put the switch into 3/34 or 1/78 the capstan speed races up almost to fast forward speed, well at least itll work in that speed for now untill i have time to look some more, thing is all my tapes area at 7/12 speed. grr. thanks for youre help.