REPAIRING AND NOT THROWING AWAY

REPAIRING AND NOT THROWING AWAY

Richtige Fernseher haben Röhren!

Richtige Fernseher haben Röhren!

In Brief: On this site you will find pictures and technical information about Service Modes, Circuit Diagrams, Firmware Update procedure, Disassemble procedure, Universal remote control set-up codes, Troubleshooting and more....

If you go into the profession, you will obtain or have access to a variety of tech tips databases HERE IT IS Master Electronics Repair !.

These are an excellent investment where the saying: 'time-is-money' rules. However, to learn, you need to develop a general troubleshooting approach - a logical, methodical, method of narrowing down the problem. A tech tip database might suggest: 'Replace C536' for a particular symptom. This is good advice for a specific problem on one model. However, what you really want to understand is why C536 was the cause and how to pinpoint the culprit in general even if you don't have a service manual or schematic and your tech tip database doesn't have an entry for your sick TV or VCR.

While schematics are nice, you won't always have them or be able to justify the purchase for a one-of repair. Therefore, in many cases, some reverse engineering will be necessary. The time will be well spent since even if you don't see another instance of the same model in your entire lifetime, you will have learned something in the process that can be applied to other equipment problems.
As always, when you get stuck, checking out a tech-tips database may quickly identify your problem and solution.In that case, you can greatly simplify your troubleshooting or at least confirm a diagnosis before ordering parts.

Happy repairing!
Today, the West is headed for the abyss. For the ultimate fate of our disposable society is for that society itself to be disposed of. And this will happen sooner, rather than later.

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..............The bitterness of poor quality is remembered long after the sweetness of todays funny gadgets low price has faded from memory........ . . . . . .....
Don't forget the past, the end of the world is upon us! Pretty soon it will all turn to dust!

©2010, 2011, 2012, 2013, 2014 Frank Sharp - You do not have permission to copy photos and words from this blog, and any content may be never used it for auctions or commercial purposes, however feel free to post anything you see here with a courtesy link back, btw a link to the original post here , is mandatory.
All posts are presented here for informative, historical and educative purposes as applicable within fair use. NOTHING HERE IS FOR SALE !

Tuesday 5 February 2019

SONY HCD-GTX777 - ERROR CODES - POWER AMPLIFIER AND SUB-WOOFER AMPLIFIER CIRCUIT DIAGRAM

Sony HCD-GTX777 - Error codes - power amplifier and sub-woofer amplifier circuit diagram

Sony HCD-GTX777- GTX787- GTX888 – Error codes – power amplifier and sub-woofer amplifier circuit diagram - STK412-150C – STK412-170C
HCD-GTX777/GTX787/GTX888 is the tuner, deck, CD and amplifier section in MHC-GTX777/GTX787/GTX888.
Front/Surround speaker
Power Output (rated): 190 W + 190 W (at 8 : and 24 :, 1 kHz, 1% THD, at LINK MODE)
RMS output power (reference)
295 W + 295 W (per channel at 8 : and 24 :, 1 kHz, 10% THD, at LINK MODE)
Subwoofer
RMS output power (reference)
160 W + 160 W (per channel at 6 :,100 Hz, 10% THD)
CD ERROR CODE MODE
Press STOP button, [DELAY] button and [DISC 1] button simultaneously to enter the error code display mode.
The fluorescent indicator tube displays the number of total error.
Each time >> button and << button are turned, display changes.
To clear the error record, operate the cold reset.
[The cold reset clears all data including preset data stored in the RAM to initial conditions.
Press STOP  button, [DELAY] button and POWER button simultaneously.
The fluorescent indicator tube becomes blank for while, and the set is reset.]
To release from this mode, press the POWER button or disconnect the power plug to turn the power OFF.
Display of total error
             [Em**Ed**]
Em** : The number of times for CDM (mechanical) errors.
Ed** : The number of times for BD error (after chucking the disc.).
Display of CDM (mechanical) error. It is show with “M” and 11 digit number.
            [M*$$%%&&0–000]
M* : The number of history error for mechanical. (“0” is latest one) (Turn >>| button to display next error.)
$$ : Mechanical errors occur in the operation.
FF : Mechanical error during normal operation.
Other : Mechanical error during initializing operation. 
%% : The process when trouble occurs
01 : Process ejecting DISC
02 : Process waiting for inserting DISC
03 : Process sending request to insert a disc to upper layer.
04 : Process sending request to eject a disc to upper layer.
05 : Process pulling a DISC in.
06 : Chucking process
07 : Re-chucking process
08 : Process cancelling chucking
&& : The operation when trouble occurs
00 : Waiting for operation.
10/11/12/13: During eject operation
20 : While pulling a disc in
30 : While cancelling chucking
40/41/42/43: During eject operation due to error.
0000 : Not used (Value is fixed to 0000).
Display of BD error. It is shown with “D” and 11 digits number.
          [D*$$%%&#00]
D* : The number of error history (“0” is latest one)
(Press > button to display next error.)
$$ : The detail of trouble
01 : Can not focus
02 : GFS error
03 : Start-up time over
04 : Continuously out of focus
05 : Q code is not input for certain time
06 : Tracking on is impossible
07 : Blank disc
%% : The process when trouble occurs
01 : While SHIP process is performed
02 : While POWER OFF is processed
03 : While INITIALIZE (POWER ON) is processed.
04 : While oscillation stops
05 : From stopping oscillation to start oscillation
06 : During stop
07 : During STOP operation
08 : While start-up is processed
09 : While TOC reading is processed
0a : During search operation
0b : During PLAY operation
0c : During pause operation
0d : During PLAY manual search operation
0e : During PAUSE manual search operation
&& : Processing operation when trouble occurs
Show each STEP mentioned in %% digits.
## : Disc speed when trouble occurs.
01 : x1 speed
02 : x2 speed (for models which support x2 speed)
04 : x4 speed
00 : Not used (value is fixed to 00).
CD MECHANISM Exploded view
Power board Schematic
Sub-woofer amplifier board – GTX-88
Power amp board HCD-GTX777/GTX787/GTX888  [STK412-150C – STK412-170C]

Posted By: FRANK at 09:03
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