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]