أعطال وصيانة تليفزيون-Repair-TV-GRUNDIG

Chasis resolder completely, then check voltages.

The Kommutierungsspulen for continuity, rotted away any connecting wires.

You have an Oscilloscope and isolating transformer?


If you it's all about the video game, that there are possibly as a Flash game for the web browser?

Chassis and modules have been checked for cold solder joints (visual inspection) and nachgelötet suspects.


The operating voltages from the power supply module are ok and not verbrummt.


Kommutierungsspulen with the H / V deflection coils are meant?

These have no interruption.


Ozzi control and isolation transformer are available.


When you press the diagnosis button speaks with push button 3, the
protective circuit is not on, but the R92 line transformer is
overloaded.

On the secondary side of the ZT is no short circuit to ground before.


It's not just to play the video game can.

But since I nunmal Both have what appears to be more rare, I would be very happy if I get the TV repaired.


Unfortunately, I have the exact sequence of operations of a thyristor power amplifier line against diagram not yet understood.

Kommutierungsspulen: the energy transfer between the thyristor, the line transformer and the deflection

- L93 on chassis

- L1313 module to return

- L1408 + L1409 on Hinlaufmodul

Of course, the H deflection to be intact.

Quote:

When you press the diagnosis button speaks with push button 3, the protective circuit is not on, but the R92 line transformer is overloaded. On the secondary side of the ZT is no short circuit to ground before.

! ** Diagnostetaster should be operated only at a reduced supply of 150-180V AC **!

Overloaded R92 congestion means the winding of the pins on ZTR f, d,
g, o, usually by just fine with connections / in their derived products
for supply voltages.

-> Vertikalmdul: pin from ZTR is generated o + D and the supply
of the IC TDA2562. May cause defective IC. R1118 to V-Mod high solder a
test.

-> RGB Module: C + The module pin out in the EW ZTR f generated.
OW has indeed changed, but has C + RGB module in a short / fine
conclusion?


Please try again with the ohmmeter.


Please only use with diagnostic probes at 150-180V power supply - you've got the resources.

The diagnostic switch I had, of course, as described in the Service Manual, tested at reduced voltage to 180V.

And I had found that one key from the outset had no passage more.


Tip of the return module and short circuit was worth gold.


Elko C1118 had 0 ohms.


Just funny that I have previously when measuring at the base ZTR not noticed. [ندعوك للتسجيل في المنتدى أو التعريف بنفسك لمعاينة هذه الصورة]


The sound is still something verbrummt, but that will be deaf to electrolytic capacitors in the tone block.


If you replace all the electrolytic capacitors in the unit as a precaution?

Or there are those manufactured by companies that are safe even after 30 years?


Thank you both for your help!

Quote:

Unfortunately, I have the exact sequence of operations of a thyristor power amplifier line against diagram not yet understood.

Since you've already repaired the Grundig, is it really no longer necessary, but maybe it's still interested after all:

Quote: 68Andy wrote on 21 Oct 2010 19:08:

where I can see a thyristor-line output stage on a plan?

In olle Maxe Grundig Super Color e.g. [ندعوك للتسجيل في المنتدى أو التعريف بنفسك لمعاينة هذه الصورة]

From Peter Zastrow, television technology, 1977


[ندعوك للتسجيل في المنتدى أو التعريف بنفسك لمعاينة هذه الصورة]


[ندعوك للتسجيل في المنتدى أو التعريف بنفسك لمعاينة هذه الصورة]


[ندعوك للتسجيل في المنتدى أو التعريف بنفسك لمعاينة هذه الصورة]


[ندعوك للتسجيل في المنتدى أو التعريف بنفسك لمعاينة هذه الصورة]



[ندعوك للتسجيل في المنتدى أو التعريف بنفسك لمعاينة هذه الصورة]

[ندعوك للتسجيل في المنتدى أو التعريف بنفسك لمعاينة هذه الصورة]

Hello.

Quote:

The diagnostic switch I had, of course, as described in the Service Manual, tested at reduced voltage to 180V.

Exemplary.

Quote:

Tip of the return module and short circuit was worth gold. Elko C1118 had 0 ohms.

You mean the vertical module * g *

C1118 + D seventh supply and the supply of the vertical amplifier. Lucky that it was not the IC.

Quote:

If you replace all the electrolytic capacitors in the unit as a precaution? Or there are those manufactured by companies that are safe even after 30 years?

In general, the time of these capacitors are robust. Were questionable
as far as I know the stone Roeder, red or orange plastic cylinder. Who
got happy instead of a high ESR or a short-circuit capacity loss.
Sometimes the plastic body also really brittle and lined with small
cracks. Nasty things.


On the edge:


You should at dieserlei equipment that had been stored for so long,
and on the other side of the primary power supply to handle high
voltages (Thyristorablenker, Röhrenablenker) the electrolytic capacitors
used in voltage more slowly (form). Especially the high-capacity filter
capacitors such as the supply of A + C94 400uF at 282V supply is
neither easy nor cheap to raise.


Would Koppelelko to the vertical coil C1136 and C1121 on the small
booster Elko resolder the vertical module I still exchange and the IC.
Kühli also down, making the area nice and clean and replace the thermal
compound. The Vert-E TDA2652 IC is not just cold and NOS is more
difficult to obtain. It would be a shame if it departs from preventable
causes.



Otherwise, everything else needed.


- Acidic electrolytic capacitors on the control module on the IC
1051 can lead to a "nervous" protection circuit. When you get there, or
expect problems, replace these capacitors.

- The control module IC1011 C1004 causes like a lazy "image hop" in
16:9 letterbox playback via AV. The other capacitors to cause this IC
then horizontally rather unstable images.

- If you get with the C706 Siebelko on your sound block NF-hum not
go away, even once the capacitors C911 and C926 check on the power
module.


And even if you did, if only for the other readers;


measure it after completion of the work, the high voltage or,
alternatively, the voltage across the charging capacitor C91, 75V + / -
0.5 V for brightness and contrast 0 (always measure with minimal beam
current).

This HS-setting on the control module should still vote, despite
Thyristortausch .- If it is more than 1V wrong, then what could be lazy.

Of course I meant the vertical module. [ندعوك للتسجيل في المنتدى أو التعريف بنفسك لمعاينة هذه الصورة]


Form I had made in so far as I'm slowly at first the mains voltage can be monitored and increase the current.


Unfortunately, this helps the capacitors on the secondary side of flyback transformers little. [ندعوك للتسجيل في المنتدى أو التعريف بنفسك لمعاينة هذه الصورة]


The vertical and the IC module, I will dedicate to your advice, again some time.


Not aware that the IC has now become so rare.


The voltage at capacitor charging, I'll check.


A high-voltage voltmeter I have not unfortunately.


The hum in the audio is about 5 seconds after the audible. Then the sound is impeccable.



At the moment I'm just about to take the appropriate message to the
TV game for the FB-pit operation. Unless it works. Except for the sound.


After measurements of defect is not on TV, or its socket in the FB Dchacht, but actually to break in to a cable video game. [ندعوك للتسجيل في المنتدى أو التعريف بنفسك لمعاينة هذه الصورة]


The picture quality is excellent. The tube is still 1A. Sharp, uniform colors, no distortion.