Sony HCD-GZR777DA – Test modes – Error codes – Circuit diagram DVD Mini Hi-Fi MHC-GZR777DA DVD DECK RECEIVER

HCD-GZR777DA is the tuner, deck, DVD and amplifier section in MHC-GZR777DA.

DVD mechanism: CDM74HFVX-DVBU101
Optical pick-up: KHM-313CAB
Tape transport mechanism: CFP42608
Power output (rated): 105 W + 105 W (at 6 Ohms 1 kHz, 1% THD)
RMS output power (reference): 210 W+ 210 W (per channel at 6 Ohms, 1 kHz)
Cold reset
The cold reset clears all data including preset data stored in the RAM to initial conditions. Execute this mode when returning the set to the customer.
1. Press the [Power] button to turn on the system.
2. Press the [Stop] button, [DISC 3] button and [Power] button simultaneously.
3. The message “COLD RESET” appears on the fluorescent indicator tube. Then, the fluorescent indicator tube becomes blank for a while, and the system is reset.

To enter Common Test Mode
1. Press the [Power] button to turn on the system.
2. Press the [Stop] button, [PRESET EQ] button and [DISC 1] simultaneously.
3. The message “VACS0” appears on the fluorescent indicator tube.
To release from Common Test Mode
1. To release from this mode, press the [Power] button.
2. To cold reset is enforced at the same time.
To enter AMP Test Mode
1. Press the [Power] button to turn on the system.
2. Press the [Stop] button, [GROOVE] button and [DISC 1] button simultaneously.
3. The message “AMP TEST IN” appears on the fluorescent indicator tube.
To release from AMP Test Mode
1. To release from this mode, press the [Power] button.
Power amplifier circuit diagram and PWB

TC amplifier boardCommon test mode

Video board

 [DVD SHIP MODE (WITH MEMORY CLEAR)]
• This mode moves the optical pick-up to the position durable to vibration and clears all data including preset data stored in the RAM to initial conditions after the power supply is turned off. Use this mode when returning the set to the customer after repair.
Procedure
1. Press the [Power] button to turn on the system.
2. Press the [DVD] button, to set the “NO DISC” mode.
3. Press the [TUNING –] button, [DISC 3] button and [Power] button simultaneously.
4. After the “STANDBY” blinking display finishes, a message “COLD RESET” appears on the fluorescent indicator tube and the DVD ship mode is set.
To release from DVD Ship Mode
1. To release from this model, press the [Power] button.

[DVD COLOR SYSTEM MODE]

This mode let you change the color system of the video output from PAL to NTSC or vice-versa.

Procedure

1. Press the [Power] button to turn on the system.

2. Press the [DVD] button.

3. Press the [Power] button to turn off the system.

4. Press the [DISPLAY] button to switch the mode the clock display or demonstration mode.

5. Press the [Stop] button and [Power] button simultaneously.  The system will turn off automatically.

6. The message “COLOR PAL” or “COLOR NTSC” appears on the fluorescent indicator tube.

To release from DVD Color System Mode

1. Once the color system has been selected, the mode is fixed thereafter. If you wish to change the mode again, perform the above item 4 again.

[DVD FIRMWARE VERSION MODE]
This mode is used to display the DVD firmware version.
Procedure:
1. Press the [Power] button to turn on the system.
2. Press the [DVD] button.
3. Press the [Power] button to turn off the system and enter the clock display or demonstration mode.
4. Press the [Stop] button and [Power] button simultaneously.
5. The version of DVD firmware appears on the on-screen display on TV.

To release from DVD Firmware Version Mode
1. To release from this mode, press the [Power] button.

[DVD SERVICE MODE]

This mode let you make diagnosis and adjustment easily by using the remote commander and the TV. The instructions, diagnostic results, etc. are given on the on-screen display.

TEST DISC LIST

Be sure to use the DVD disc that matches the signal standards of your region.

• CD

YEDS-18 (Part No.: 3-702-101-01)

PATD-012 (Part No.: 4-225-203-01)

• DVD SL (Single Layer)

NTSC : HLX-503 (Part No.: J-6090-069-A)

HLX-504 (Part No.: J-6090-088-A)

PAL : HLX-506 (Part No.: J-6090-077-A)

• DVD DL (Double Layer)

NTSC : HLX-501 (Part No.: J-6090-071-A)

HLX-505 (Part No.: J-6090-089-A)

PAL : HLX-507 (Part No.: J-6090-078-A)

Procedure to enter to DVD Service Mode

1. Press the [Power] button to turn on the system.
2. Press the [DVD] button.
3. Press the [Stop] button and [OPEN/CLOSE] button simultaneously and then turn the [MASTER VOLUME] dial clockwise.
4. The message “SERVICE IN” appears on the fluorescent indicator tube and the Top Menu of Remocon Diagnosis Menu appears on the on-screen display on the TV. The model name, main unit’s micom version information (IF-con) and DVD firmware version information (Syscon) are displayed at the bottom of the on-screen display.

5. To execute each function, press its number by using numeric button on the remote commander.
6. To release from this mode, press the [Power] button to turn off the system.

To clear the Laser Hours
Press the [ DISPLAY] button and then press the [CLEAR] button. The data for both CD and DVD data are reset.

Error display codes

The meaning of error code is as below
01: Communication error (No reply from syscon)
02: Syscon hung up
03: Power OFF request when syscon hung up
19: Thermal shutdown
24: MoveSledHome error
25: Mechanical move error (5 Changer)
26: Mechanical move stack error
30: DC motor adjustment error
31: DPD offset adjustment error
32: TE balance adjustment error
33: TE sensor adjustment error
34: TE loop gain adjustment error
35: FE loop gain adjustment error
36: Bad jitter after adjustment
40: Focus NG
42: Focus layer jump NG
51: Spindle stop error
52: Open kick spindle error
60: Focus on error
61: Seek fail error
62: Read Q data/ID error
70: Lead in data read fail
71: TOC read time out (CD)
80: Can’t buffering
81: Unknown media type