Help with Ferguson W7022U TV

[Dave Bullock]

Help,
My Ferguson W7022U TV won't come on.
The red standby light is working and the set monentarily comes to life when
I use the remote.
However during the usual delay that the set takes to check all is well
before the CRT fires up, the set switches back to standby and it makes the
usual 'plop' in the speakers as it did when normally switching off.
Over the two days before completely failing it took to switching itself off
and on at random.
Can anyone point me to the 'STOCK' faults.
Thanks....
Dave

 

[b]

Dave Bullock ha escrito:

Help,
My Ferguson W7022U TV won't come on.
The red standby light is working and the set monentarily comes to life when
I use the remote.
However during the usual delay that the set takes to check all is well
before the CRT fires up, the set switches back to standby and it makes the
usual 'plop' in the speakers as it did when normally switching off.
Over the two days before completely failing it took to switching itself off
and on at random.
Can anyone point me to the 'STOCK' faults.
Thanks....
Dave

which chassis is this? if you intend to solve this yourself or ask
for assistance, you'll need that info. Likely a Thomson. Look for
something starting with an ICC or TX on stickers on the rear of the
chassis.
You will also have to take some measurements and do some basic fault
diagnosis- start with the most likely - remove the horizontal
transistor and connect a 60-100 w bulb across c-e, see if there is b
+: if so, measure it.
chances are the set is protecting itself due to a short, often in the
horizontal /line stage or on the vertical/frame output chip - 2
common culprits.
Anyway lets not get ahead of ourselves - post results of the tests and
we'll take it form there!

Note that there are safety hazards involved , if none of the above
makes sense to you then don't play about, take it to a tech. You could
screw it up beyond economical repair or kill yourrself if you go
poking around!
-B.

 

[Dave Bullock]

OK Thanks,

It's an ICC17 and the red LED on the front is flashing 2 and 7 so 27 which
is a deflection fault of some sort.
Obviously the STANDBY supply is OK but the set has been coming on
momentarily and then going off and no amount of remote button pressing will
get it to come on again.
So I suspected deflection faults and started faultfinding with my set
powered through an isolation transformer.
I shorted pin 4 of IP95 to GND and the voltages for U-TIMER, U-SYS, 5VUP,
+UA and U-VIDEO are correct but only for a few seconds then they all go
dead, I am now suspecting a SwitchMode fault?
Any ideas gratefully recieved.

Thanks...Dave

 

[b]

OK Thanks,

looks like the line stage. Did you remove the line transistor and
check b+? that should be one of the first tests when these problems
are suspected. From there check the vertical /frame IC - and before
changing it see if its feed resistor is open.

here's a few related stock faults as requested.
good luck.
B.

ICC17 "ERR27",LOPTX MOD KIT(35175720)
ICC17 "ERR27",ZL11 ZL13,FIELD O/P
ICC17 3 TRIPS/DEAD LED(FAULT27)(LOPTX1273 SEME KIT).
ICC17 CRT BASE SPARKS,LOPTX(HR8317) ADD 470PF2KV ACROSS LOPTR
ICC17 DEAD DP21, 39V ZENER
ICC17 DEAD "25" FLASHES,LOPTX(KIT)
ICC17 DEAD BENT SIDES,TL41(BC241C/TIP41C)
ICC17 DEAD CHOPTR(BU2525AX),TP42(B857B SM),TP57,TP58,TP59
ICC17 DEAD CHOPTR,TP44(2SA1020Y),DP42(LL4148)
ICC17 DEAD CUST CNTRL PANEL NO 5V TO IR RECIEVER.
ICC17 DEAD DP21(39V ZD) LOC121
ICC17 DEAD DP21,39V ZENER
ICC17 DEAD ERR 27,FIELD TDA8351,ZL13
ICC17 DEAD FLASH 2/7,RP63(432K) HT VOLTAGE SENSING
ICC17 DEAD FLASHING LED SHORT COLLECTOR OF TL71 TO EMITTER,FIELD ZL11
CP
ICC17 DEAD FUSE BUH1215 (TP50). PSU REPAIR KIT (CHARLES HYDE -
20104QK)
ICC17 DEAD LED FLASHS 2,7 CL25(1UF25V),CL24(360NF),TL41(BC241C/TIP41C)
ICC17 DEAD LED FLASHS 2,7 RP63(432K)
ICC17 DEAD LOPTX ARCING DON'T USE HR TYPE
ICC17 DEAD LOPTX+LOPTR
ICC17 DEAD RED LED,2 PULSES 7 PULSES LOPTR,IF01 ZL11 FIELD CHIP
ICC17 DEAD ZL13,TDA8351
ICC17 DEAD,DP06(BZW04-342) ACROSS BRIDGE RECT
ICC17 DEAD/STBY LOPTR(BUH516)
ICC17 DISABLE TRIP SHORT ACROSS C/E OF TL17
ICC17 DISABLE TRIP SHORT COLLECTOR TL71(SM) TO EARTH, LOC41
ICC17 DISABLE TRP BY TL71(C TO CHASSIS) NR CREEN CAN UNDER PCB

 

[mariomatis]

[QUOTE = Dave Bullock; 596.632] Aiuto,
Il mio Ferguson TV W7022U non si accendono.
La luce rossa di standby è di lavoro e il set si monentarily alla vita, quando
Io uso il telecomando.
Tuttavia, durante il consueto ritardo che l'insieme prende per controllare tutto è andato bene
prima che il CRT fuochi in su, il set torna alla modalità standby e rende il
usual 'plop' dei diffusori come quando normalmente spegnimento.
Nel corso dei due giorni prima di non aver completamente che ci voleva per sé spegnimento
e su a caso.
Qualcuno mi può punto a difetti del 'magazzino'.
Grazie ....
Dave [/ QUOTE]
Sono mario dall'Italia
Buongiorno volevo chiedere a Dave Bullock se è riuscito a risolvere il suo problema
sul telaio icc17 tv thomson perche anche io ho lo stesso problema che mi fa impazzire!
ho gia controllato decine di volte i componenti e cambiato il tr di riga(hr8317)
ma cotinua a darmi error 27
grazie mario