Friday, June 03, 2016

Sony Audio system - Sony HCD-GZR99D - HCD-GZR88D - Cold reset – How to enter to DVD service mode – How to etet the amp – How to test the panel – Audio system repair and service

Category: Audio System Repair and Service 

Contents of this article 

  • Clod reset procedure 
  • How to access service mode 
  • How to test the amp function 

Sony HCD-GZR99D - HCD-GZR88D

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.
Procedure:
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 liquid crystal display panel. Then, the liquid crystal display panel becomes blank for a while, and the system is reset.
COMMON TEST MODE
This mode is used to check operations of the respective section of Equalizer level, volume and VACS ON/OFF.
Procedure:
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 liquid crystal display panel.
Check of Equalizer Level
1. Press the [EQ BAND/MEMORY] button repeatedly until a message “ALL EQ MIN” appears on the liquid crystal
display panel. GEQ decreases to its minimum.
2. Press the [EQ BAND/MEMORY] button repeatedly until a message “ALL EQ MAX” appears on the liquid crystal display panel. GEQ increases to its maximum.
3. Press the [EQ BAND/MEMORY] button repeatedly until a message “ALL EQ FLAT” appears on the liquid crystal display panel. GEQ is set to flat.
Check of Volume
1. Press the [DISPLAY] button repeatedly, the sound volume increases to its maximum and message “VOLUME16” t “VOLUME MAX” appears on the liquid crystal display panel.
2. Press the [OPTIONS] button repeatedly, the sound volume decreases to its minimum and message “VOLUME16” t “VOLUME MIN” appears on the liquid crystal display panel.
Check of VACS (Variable Attenuation Control System)
ON/OFF Select
1. Press the [REC TO USB] button repeatedly until a message “VACS OFF” or “VACS ON” appears on the liquid crystal display panel.
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.
AMP TEST MODE
This mode is used to display the real time VACS level and check operations of the respective sections of Equalizer band and DBFB ON/OFF.
Procedure:
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 of the liquid crystal display panel.
Check of VACS Display/AMP Adjustment Select
1. Press the [REC TO USB] button repeatedly until a message “V0 0 0” appears on the liquid crystal display panel. “0” represents VACS level which is triggered by signal level.
2. Press the [REC TO USB] button repeatedly until a message “D +6 +2 +4” appears on the liquid crystal display panel. “+6” represents Equalizer Low level, “+2” represents Equalizer Mid level and “+4” represents Equalizer High level.
Check of Equalizer Band Select
1. Press the [EQ BAND/MEMORY] button repeatedly until a message “LOW +6 dB” appears on the liquid crystal display panel. EQ Band is set to Low level.
2. Press the [EQ BAND/MEMORY] button repeatedly until a message “MID +2 dB” appears on the liquid crystal display panel. EQ Band is set to Middle level.
3. Press the [EQ BAND/MEMORY] button repeatedly until a message “HIGH +4 dB” appears on the liquid crystal display panel. EQ Band is set to High level.
Change of Equalizer Band
1. Press the [EQ BAND/MEMORY] button repeatedly until a message “LOW +6 dB” appears on the liquid crystal display panel.
2. When the [OPERATION DIAL] ring is turned clockwise or counterclockwise even slightly, “LOW +6 dB” change
to “LOW –8 dB” y “LOW +8 dB” appears on the liquid crystal display panel.
3. Press the [EQ BAND/MEMORY] button repeatedly until a message “MID +2 dB” appears on the liquid crystal display panel.
4. When the [OPERATION DIAL] ring is turned clockwise or counterclockwise even slightly, “MID +2 dB” change to “MID –8 dB” y “MID +8 dB” appears on the liquid crystal display panel.
5. Press the [EQ BAND/MEMORY] button repeatedly until a message “HIGH +4 dB” appears on the liquid crystal display panel.
6. When the [OPERATION DIAL] ring is turned clockwise or counterclockwise even slightly, “HIGH +4 dB” change to “HIGH –8 dB” y “HIGH +8 dB” appears on the liquid crystal display panel.
Check of DBFB ON/OFF Select
1. Press the [OPTIONS] button repeatedly until a message “DBFB OFF” or “DBFB ON” appears on the liquid crystal display panel.
To release from AMP Test Mode
1. To release from this mode, press the [POWER] button.
TCM OFFLINE MODE
(EXCEPT HCD-GZR99D: E2, E51, AR, MX, MODEL)
This mode prevents the system from tuning off automatically when TCM is not connected. Therefore, measurements can be done even when TCM is not connected during production.
Procedure:
1. Press the [POWER] button to turn off the system and enter the clock display or demonstration mode.
2. Press the [REC TO TAPE] button, [DISC 3] button and [POWER] button simultaneously. The system will turn on automatically.
3. The message “TCM OFFLINE” appears on the liquid crystal display panel.
To release from TCM OFFLINE Mode
1. To release from this mode, press the [POWER] button.
PANEL TEST MODE
This mode is used to check the liquid crystal display panel, LEDs, button, MASTER VOLUME dial, OPERATION DIAL ring, system software version, DVD lib version, model name and destination.
Procedure:
1. Press the [POWER] button to turn on the system.
2. Press the [STOP] button, [DISC 3] button and [DISPLAY] button simultaneously.
3. Power illuminator LEDs and segment in liquid crystal display panel are lighted up.
4. When you want to enter to the system software version display model, press the [DISC 1] button. The system software version appears on the liquid crystal display panel.
Press the [DISC 1] button again, the DVD lib version appears on the liquid crystal display panel.
5. Press the [DISC 2] button the mode name and destination on the liquid crystal display panel.
6. Press the [DISC 3] button the key encode test mode is activated.
7. In the key encode test mode, the liquid crystal display panel displays “KEY 0 0 0 0 0”.
Each time a button pressed, change the each numbers.
To release from Panal Test Mode
1. To release from this mode, press the [STOP] button, [DISC 3] button and [DISPLAY] button simultaneously.
DVD SHIP MODE (WITHOUT MEMORY CLEAR)
This mode moves the optical pick-up to the position durable to vibration. 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 “DVD NO DISC” mode.
3. Press the [B] button
(HCD-GZR99D: E2, E51, AR, MX model) or [Y] button
(Except HCD-GZR99D: E2, E51, AR, MX model) and [POWER] button simultaneously.
The system will turn off automatically.
4. After the “STANDBY” blinking display finishes, a message “LOCK” appears on the liquid crystal display panel and the DVD ship mode is set.
To release from DVD Ship Mode
1. To release from this mode, press the [POWER] button.
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 “DVD 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 liquid crystal display panel and the DVD ship mode is set.
To release from DVD Ship Mode
1. To release from this mode, press the [POWER] button.
DISC THEFT PREVENTION MODE
This mode let you lock the disc tray. When this mode is activated, the disc tray will not open.
Procedure:
1. Press the [POWER] button to turn on the system.
2. Press the [DVD] button.
3. Press the [STOP] button and [OPEN/CLOSE Z] button simultaneously and hold down until “LOCKED” or “UNLOCKED” appears on the liquid crystal display panel (around 5 seconds).
To release from Disc Theft Prevention Mode
1. This mode will not be deselected only by turning the power off. To exit from the mode, perform the above item 4 again.
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 on automatically.
6. The message “COLOR PAL” or “COLOR NTSC” appears on the liquid crystal display panel.
To release from DVD Color System Mode
1. Once the color system has been selected, the mode is fixed there after. 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.
MTK REBOOT AVOIDANCE MODE
This mode is used to display the MTK Reboot Avoidance.
Procedure:
1. Press the [POWER] button to turn on the system.
2. Press the [DVD] button.
3. Press the [DVD] button, [DISPLAY] button and [TUNING +] button simultaneously.
To release from MTK Reboot Avoidance Mode
1. To release from this mode, press the [POWER] button.
AM TUNER STEP CHANGE
The step interval of AM channels can be toggled between 9 kHz and 10 kHz.
Procedure:
1. Press the [POWER] button to turn on the system.
2. Press the [TUNER/BAND] button repeatedly to select the “AM”.
3. Press the [POWER] button to turn off the system.
4. Press the [TUNING +] button and [POWER] button simultaneously.
The system will turn on automatically.
5. The message “AM 9k STEP” or “AM 10k STEP” appears on the liquid crystal display panel and thus the channel step change.
VIDEO/SAT FUNCTION CHANGE
This mode let you change from VIDEO to SAT and vice-versa.
Procedure:
1. Press the [POWER] button to turn on the system.
2. Press the [VIDEO/SAT] button.
3. Press the [VIDEO/SAT] button and [STOP] button simultaneously.
The function will change to SAT. Press the same button again to change from SAT to VIDEO.
DVD SERVICE MODE
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 liquid crystal display panel 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.