philips 40pft4509/12 dead

[bonesy]

Hi guy's got the above model Philips,which is dead no st-by light.The set has no customer controls at all on set,just remote.I've checked psu voltages,the always 12 volts is low at 9volts,24volts sitting at 20 volts.There are no voltages from signals board back to psu (psu on or st-by on/off)I presume because the 12 volts to signal board is low.The voltage across the smoothing caps is just short of 360 volts,caps rated at 450 volts,so may be a little low.Just wondered if anyone's had any dealings with this 4000 series t.v.

[Davy]

Is there no 5V for the micro?

Dave

[bonesy]

No ,there's nothing marked up on either end of psu cable,so I presume its derived from the always 12 volt, on the signals board.& because the 12volt is low,then 5 or 3.3 volt is also very low.

[Davy]

Strange, maybe look around the micro for a voltage clue, should be a electrolytic around,  the main clue is no standby light.

Dave

[bonesy]

Well spent a bit more time on it Saturday,Ran up psu out of set by applying 5 volts to psu on pin from ssb.All rails came up to near marked values.As I said it has no customer controls on set,or so I thought!But when I removed the ssb board from set,right at the bottom of the av inputs section,I found a small tact switch.When I looked on bracket to see what it was,it's marked with on/off symbol.Gave it a push & away it went,all working fine.Stupid engineer,stupid design,still at least wont fall for that again.Lol.

[Davy]

Yep, I know how you feel..... I've been had like that - and so as as other folks, the owners I mean.

"Mi telly's not workin, can ya come un ava look pleese"..... sure you get there and find the plugs been removed by 'er who must be obeyed' for hovering purposes, just as I was getting the last screw out the back..... Oh oh, what's this I've found! Now if they'd painted the darn button red it'd stand out like a sore thumb - right where you wouldn't expect to see a switch.

Dave

[Turnip]

Philips have always done things their way, and having worked for a rental company tied to them, you should always expect the unexpected.

Can be an earner though, as had several Philips CRT combo in where folks didn't realise the on/off switch was on the side even after they'd turned it off there - Chris.

[bonesy]

I think it got me because there were no other customer controls on the set.Won't forget that one again.The tact switch was literally right in the bottom corner,very poorly marked.

[Davy]

Philips have always done things their way, and having worked for a rental company tied to them, you should always expect the unexpected......  - Chris.

Right on.... and they never change.   So you'll know about the G6 and the PD500 voltage stabilizer  then.  My worst nightmare with Philips is their auto change record player decks..... one telly can't remember the chassis  wires use to fall off every time I looked at them.

Dave

[bonesy]

I think I was lucky,I fixed a few g8 &9's but mostly kt3 & k30/5 which I didn't mind.I remember some years back now being confronted with a 36" wide screen set,sat on a massive glass stand with legs.
After spending a huge amount of time looking fiddling,came to the conclusion it was all one piece,not stand plus tv.When the custy came home he confirmed that when un-boxed in house it was all in one.
So had to spend ages fixing it in the house.Made lots of money out of the famous "Charlie" vhs decks,rebuilding them,engineers use to bring them to me by the van load,tubes of white grease & lots of patience.Lol.I wonder if I could remember how to do one now,or Panasonic G mechs another big earner.

[Davy]

Could pick KT3 and G8 up as ex-rentals, they were good sellers. G8's were the 'bottle swappers dream' - just lob a new panel in.

A bottle swapper an engineer who's capabilities doesn't exceed that of changing valve's and always carries a screwdriver in his top pocket for clouting purposes.

Dave

[Turnip]

Hi Dave,

It's a thought but G8's had few valves. We used to have a chap in the old days who could screw the mains input down to 200v without taking the back off.

We eventually lost him to private enterprise - He used to take the bus for his rounds as could service tellies without tools.

Sadly lost touch in the late 60s, but 'HO' is ever remembered in Norwich - Chris.

[Davy]

You are right Turnip.... I meant G11 chassis.

Dave

[bonesy]

I worked with one,the most short tempered person you could ever wish to meet.He could look at his job sheets & predict which ones would have to come in which ones you took the back off.He new the location of every public loo in Northampton(weak bladder)The main controlling factor every single day,was be back to by 4.45pm because of the F in 5o'clock traffic all other drivers are f in merchant bankers.Being a passenger in the little Bedford van was like an outing with Lewis Hamilton minus the skill set.We were all convinced that one day,he would just keel over from a heart attack.In his time he knocked countless people off bicycles,at least two coppers on traffic duty & one traffic warden on the bonnet of the van.Never prosecuted would you believe.

[Turnip]

Hi Dave,

You're pulling my BU105/2 - G11's  had even less valves than G8s.

Matter of curious history - Worked with a chap who worked for 'Spencer West' in Gt Yarmouth. He insisted that they had sorted colour television using a mono tube, and in the late 50s.

Reality was rather fun as they did design - sort'a, but insisted most every valve should be dual to save cost - They did sound with a PCF80 and F/OP with an ECL80 where bottom cramping was the norm. Mind you, they did great cabinets, as one of the chaps was great with wood.

Never saw their colour set, but at 19 was almost a believer, as can be at that age - Chris.