Philips G17T320-02 B&W TV schematic/help please. - Page 2 - UK Vintage Radio Repair and Restoration Discussion Forum

zens.tv · 30th Oct 2014, 4:50 pm

cheers guys,would be good to confirm 100%,how they are supposed to measure.

the colleague i mentioned send me 2x BF196 & 2X BF197. could it be poss that all 4 of them are faulty and measuring one way on the collector/emitter junction ?

zens.tv · 30th Oct 2014, 5:19 pm

just bought BF198 & BF199 from ebay.

direct equivalents,400mhz & 550mhz respectively. same as originals

Tazman1966 · 30th Oct 2014, 6:06 pm

I got my new old stock ones from Cricklewood Electronics...and they were ok!

toshiba tony · 30th Oct 2014, 6:19 pm

Forgive my lack of gen on this one zen, but wasn't the original symptom one of visibly low eht and excessive ht on the smoothers. Where are the aforementioned bf transistors in the circuit? Yourre very revered on your normal site, I cant see an old mono set holding you back much longer, members on this site no offence intended, I like the oldies, equipment of coarse! Something in the back of my mind hints that on a digital meter you could get slight readings on the pins you wouldnt usually, as you could with germanium ones, and they would still be OK.

zens.tv · 30th Oct 2014, 6:34 pm

BF transistors are in the 2 IF cans
poss Tony regarding DVM,i will find out when the Ebay ones arrive.yes your correct on the original symptoms,but it seems tv is experiencing one issue after another.

CRT theory has been forced out of my head to make room for modern sets

i have a headache

zens.tv · 20th Nov 2014, 3:46 pm

transistor in I.F can ok.slightly led me astray

as i have been finding quite a few high value resistor,decided to blanket cold check all

first on the list is REF 104 ( 390K ),on tube base. reads high at 570K

zens.tv · 20th Nov 2014, 4:26 pm

2 resistors in series,unkown ref.

390K,reads high at 495K

820K,reads high at 1M1

zens.tv · 20th Nov 2014, 6:25 pm

discovered diode REF 469 ( BYX10 ) to be O/C

replaced,using a BY228,powered on and

Tazman1966 · 21st Nov 2014, 11:10 am

Ahhhh lovely

Has this set got the original rotary six position channel selector or has it been replaced with a six slopey button Philips 550 version?

Welsh Anorak · 21st Nov 2014, 2:36 pm

Hi
Tas - I remember those! Just the same as the 550 series to repair - open the clips, Brasso the board and stretch the contacts, then reassemble, only to discover you've put the contacts back upside down so it works backwards...
Always brilliant tubes as said above. A nice looking set if not too reliable - as the great LLJ said - pretty little things are often naughty!
Glyn

zens.tv · 21st Nov 2014, 3:44 pm

yes Tas,has original channel selector.

just one more part required to complete

require the main smoother,it's a 2 X 400MF,which needs to be a specific size to fit into clamp.

DIMENSIONS

DIAMETER = 38MM

HEIGHT = 78MM

2 X 560MF caps in there at the moment,joined with duck tape,which is not really ideal.

30th Oct 2014, 4:50 pm	#21
zens.tv Retired Dormant Member Join Date: Oct 2014 Location: London, UK. Posts: 324	Re: Philips G17T320-02 B&W TV schematic/help please. cheers guys,would be good to confirm 100%,how they are supposed to measure. the colleague i mentioned send me 2x BF196 & 2X BF197. could it be poss that all 4 of them are faulty and measuring one way on the collector/emitter junction ?

30th Oct 2014, 5:19 pm	#22
zens.tv Retired Dormant Member Join Date: Oct 2014 Location: London, UK. Posts: 324	Re: Philips G17T320-02 B&W TV schematic/help please. just bought BF198 & BF199 from ebay. direct equivalents,400mhz & 550mhz respectively. same as originals

30th Oct 2014, 6:06 pm	#23
Tazman1966 Nonode Join Date: May 2006 Location: St Albans, Herts, UK. Posts: 2,193	Re: Philips G17T320-02 B&W TV schematic/help please. I got my new old stock ones from Cricklewood Electronics...and they were ok! __________________ All the very best, Tas

30th Oct 2014, 6:19 pm	#24
toshiba tony Heptode Join Date: May 2006 Location: Accrington, Lancashire, UK. Posts: 978	Re: Philips G17T320-02 B&W TV schematic/help please. Forgive my lack of gen on this one zen, but wasn't the original symptom one of visibly low eht and excessive ht on the smoothers. Where are the aforementioned bf transistors in the circuit? Yourre very revered on your normal site, I cant see an old mono set holding you back much longer, members on this site no offence intended, I like the oldies, equipment of coarse! Something in the back of my mind hints that on a digital meter you could get slight readings on the pins you wouldnt usually, as you could with germanium ones, and they would still be OK.

30th Oct 2014, 6:34 pm	#25
zens.tv Retired Dormant Member Join Date: Oct 2014 Location: London, UK. Posts: 324	Re: Philips G17T320-02 B&W TV schematic/help please. BF transistors are in the 2 IF cans poss Tony regarding DVM,i will find out when the Ebay ones arrive.yes your correct on the original symptoms,but it seems tv is experiencing one issue after another. CRT theory has been forced out of my head to make room for modern sets i have a headache

20th Nov 2014, 3:46 pm	#26
zens.tv Retired Dormant Member Join Date: Oct 2014 Location: London, UK. Posts: 324	Re: Philips G17T320-02 B&W TV schematic/help please. transistor in I.F can ok.slightly led me astray as i have been finding quite a few high value resistor,decided to blanket cold check all first on the list is REF 104 ( 390K ),on tube base. reads high at 570K Attached Thumbnails

20th Nov 2014, 4:26 pm	#27
zens.tv Retired Dormant Member Join Date: Oct 2014 Location: London, UK. Posts: 324	Re: Philips G17T320-02 B&W TV schematic/help please. 2 resistors in series,unkown ref. 390K,reads high at 495K 820K,reads high at 1M1 Attached Thumbnails

20th Nov 2014, 6:25 pm	#28
zens.tv Retired Dormant Member Join Date: Oct 2014 Location: London, UK. Posts: 324	Re: Philips G17T320-02 B&W TV schematic/help please. discovered diode REF 469 ( BYX10 ) to be O/C replaced,using a BY228,powered on and Attached Thumbnails

21st Nov 2014, 11:10 am	#29
Tazman1966 Nonode Join Date: May 2006 Location: St Albans, Herts, UK. Posts: 2,193	Re: Philips G17T320-02 B&W TV schematic/help please. Ahhhh lovely Has this set got the original rotary six position channel selector or has it been replaced with a six slopey button Philips 550 version? __________________ All the very best, Tas

21st Nov 2014, 2:36 pm	#30
Welsh Anorak Dekatron Join Date: Apr 2005 Location: North Wales, UK. Posts: 6,918	Re: Philips G17T320-02 B&W TV schematic/help please. Hi Tas - I remember those! Just the same as the 550 series to repair - open the clips, Brasso the board and stretch the contacts, then reassemble, only to discover you've put the contacts back upside down so it works backwards... Always brilliant tubes as said above. A nice looking set if not too reliable - as the great LLJ said - pretty little things are often naughty! Glyn

21st Nov 2014, 3:44 pm	#31
zens.tv Retired Dormant Member Join Date: Oct 2014 Location: London, UK. Posts: 324	Re: Philips G17T320-02 B&W TV schematic/help please. yes Tas,has original channel selector. just one more part required to complete require the main smoother,it's a 2 X 400MF,which needs to be a specific size to fit into clamp. DIMENSIONS DIAMETER = 38MM HEIGHT = 78MM 2 X 560MF caps in there at the moment,joined with duck tape,which is not really ideal. Attached Thumbnails