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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Note that if you don't find what you searched for, try it after a period of time; the site is a never ending job !

..............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 !

Monday, 4 March 2019

SONY HCD-ZUX999 - COMPACT DISC RECEIVER - COLD RESET – PANEL TEST FLD TEST – FACTORY MODE – AUDIO SYSTEM REPAIR AND SERVICE

SONY HCD-ZUX999 - COMPACT DISC RECEIVER - Cold reset – Panel test Fld test – factory mode – Audio system repair and service

Category: Audio System Repair and Service  

Contents of this article

  • Cold reset Procedure
  •  Factory Mode
  • Power amplifier Schematic 


SONY HCD-ZUX999

TEST MODE
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 [POWER] button to turn on the system.
2. Press [STOP] button at channel A, [ENTER] button at channel B, and [POWER] button simultaneously.
3. “COLD RESET” appears on the fluorescent indicator tube.
After that, the fluorescent indicator tube becomes blank for a while, and the system is reset.
MC TEST MODE
This mode is used to check operations of the respective sections of Amplifier and Tape.
Note: When VOLUME MAX is selected during MC TEST MODE, a considerable level of volume will be outputted from the speaker. Because of this, a resistor of several hundred ohms to several kilohms in series should be connected for attenuation.
Procedure:
To enter MC Test Mode
1. Press [STOP] button at channel A, [ENTER] button at channel B and [X-MAXIMIZER] button simultaneously.
2. The line image display flashes on the fluorescent indicator
tube. The function is no changed. The volume is changed to VOLUME MIN/MAX.
Check of Amplifier
1. Turn [HIGH] or [MID] or [LOW] dial repeatedly until a message “GEQ MAX” appears on the fluorescent indicator tube. GEQ increases to its maximum.
2. Turn [HIGH] or [MID] or [LOW] dial repeatedly until a message “GEQ MIN” appears on the fluorescent indicator tube. GEQ decreases to its minimum.
3. Turn [HIGH] or [MID] or [LOW] dial repeatedly until a message “GEQ FLAT” appears on the fluorescent indicator tube. GEQ is set to flat.
4. When the [MASTER VOLUME] knob is turned clockwise even slightly, the sound volume increases to its maximum and a message “VOLUME MAX” appears on the fluorescent indicator tube.
5. When the [MASTER VOLUME] knob is turned counterclockwise even slightly, the sound volume decreases to its minimum and a message “VOLUME MIN” appears on the fluorescent indicator tube.
6. Press [DJ MODE] button to enter the DJ MODE.
7. Use [CROSS FADER] to select FADER operation at channel A and at channel B.
8. Use [HEAD PHONE LEVEL] to check the headphone level.
9. Use [MIC LEVEL] to check the microphone level.
To release from Common Test mode
1. To release from this mode, press [POWER] button.
2. The cold reset is enforced at the same time.
PANEL TEST MODE
This mode is used to check the software version, FL and KEY.
Display Test Mode
Procedure:
1. Press the [POWER] button to turn the power on.
2. Press [STOP] button at channel A, [ENTER] button at channel B, and [ILLUMINATION] button simultaneously.
3. All LEDs and segments in fluorescent indicator tube are turned on. “All LEDs are turned off.” should be removed.
4. To exit from this mode, press [STOP] button at channel A, [ENTER] button at channel B, and [ILLUMINATION] button simultaneously.
FL Pattern Test Mode
Procedure:
1. When the display test mode is activated, press the [LEVEL INDICATOR] button to select the FL pattern test mode.
2. When in the FL pattern test mode, half segments of fluorescent indicator tube and half lamps are turned on.
3. Press the [LEVEL INDICATOR] button. The remaining half segments of the fluorescent indicator tube and the remaining half lamps are turned on.
4. Next press the [LEVEL INDICATOR] button, all the segments of the fluorescent indicator tube are turned off.
5. To exit from this mode, press [STOP] button at channel A, [ENTER] button at channel B, and [ILLUMINATION] button simultaneously.
CD 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 [POWER] button to turn on the system.
2. Select CD function without disc.
3. Press [CD/DISC] button and [POWER] button simultaneously. The system turns off automatically.
4. After the “STANDBY” blinking display finishes, a message
“MECHA LOCK” is displayed on the fluorescent indicator tube and the CD ship mode is set.
5. To exit from this mode, disconnect the power cord to turn off the system.
CD 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 during the next AC-In. Use this mode when returning the set to the customer after repair.
Procedure:
1. Press [POWER] button to turn on the system.
2. Select CD function.
3. Press [STOP] button at channel B, [CD/DISC] button and [POWER] button simultaneously. The system turns off automatically.
4. After the “STANDBY” blinking display finishes, a message “MECHA LOCK” is displayed on the fluorescent indicator tube and the CD ship mode is set.
5. To exit from this mode, disconnect the power cord to turn off the system.
DISC THEFT PREVENTION MODE
The disc tray lock function for the antitheft of an demonstration disc in the store is equipped.
Setting Procedure:
1. Press the [POWER] button to turn the set on.
2. Press the [CD/DISC] button to set CD function.
3. Insert a disc.
4. Press the [STOP] button at channel A and the [OPEN/CLOSE] button simultaneously for five seconds.
5. The message “LOCKED” is displayed and the tray is locked.
Releasing Procedure:
1. Press the [STOP] button at channel A and the [OPEN/CLOSE] button simultaneously for five seconds again.
2. The message “UNLOCKED” is displayed and the tray is unlocked.
Note: When “LOCKED” is displayed, the tray lock is not released by turning power on/off with the [POWER] button.
TUNER STEP CHANGE
The step interval of AM channels can be toggled between 9 kHz and 10 kHz. This mode is not available for Saudi Arabian and Russian models.
Procedure:
1. Press [POWER] button to turn on the system.
2. Press [TUNER/BAND] button repeatedly to select the “AM”.
3. Press [POWER] button to turn off the system.
4. Press [ENTER] button at channel A and [POWER] button simultaneously. The system turns on automatically. The message “AM 9K STEP” or “AM 10K STEP” appears on the fluorescent indicator tube and thus the channel step is changed.
VACS ON/OFF
This mode is used to switch ON and OFF the VACS (Variable Attenuation Control System).
Procedure:
1. Press [POWER] button to turn on the system.
2. Press [STOP] button at channel A and [OPTIONS] button simultaneously. The message “VACS OFF” or “VACS ON” appears
on the fluorescent indicator tube.
VACS DISPLAY
This mode is used to check the VACS level.
Procedure:
1. Press [POWER] button to turn on the system.
2. Press [STOP] button at channel A, [CD/DISC] button and [RETURN] button at channel B simultaneously.
3. The fluorescent indicator tube displays “VACS$ AP#”. “VACS” represents Conventional VACS (Triggered by signal level) “AP” represents APVACS (Abuse Protection VACS) “$” is the Conventional VACS level. “#” is the APVACS level.
4. To exit from this mode, press [x] button at channel A, [CD/ DISC] button and [RETURN] button at channel B simultaneously
BPM RESET
Procedure:
1. Press the [POWER] button to turn the power on.
2. Press [BEAT SPEED] button and [ENTER] button at channel A simultaneously.
3. When this button is operated, display as “BPM RESET” for a while and all of the settings are reset.
CHAIN, CHAIN B, CHAIN C, CHAIN D
Procedure:
1. Press the [POWER] button to turn the power on.
# CHAIN mode
2. Press [PAD 1] button and [PAD 2] button simultaneously.
3. The message “CHAIN 1 < – > 2” will be displayed on the fluorescent indicator tube.
4. The beats and the rhythm are changed by turning the [OPERATION JOG] dial clockwise and counterclockwise.
# CHAIN B mode
5. Press [PAD 3] button and [PAD 4] button simultaneously.
6. The message “CHAIN 3 < – > 4” will be displayed on the fluorescent indicator tube.
7. The beats and the rhythm are changed by turning the [OPERATION JOG] dial clockwise and counterclockwise.
# CHAIN C mode
8. Press [PAD 1] button and [PAD 4] button simultaneously.
9. The message “CHAIN 1 < – > 4” will be displayed on the fluorescent indicator tube.
10. The beats and the rhythm are changed by turning the [OPERATION JOG] dial clockwise and counterclockwise.
# CHAIN D mode
11. Press [PAD 3] button and [PAD 2] button simultaneously.
12. The message “CHAIN 3 < – > 2” will be displayed on the fluorescent indicator tube.
13. The beats and the rhythm are changed by turning the [OPERATION JOG] dial clockwise and counterclockwise
BD FACTORY MODE
Procedure:
1. Press [POWER] button to turn on the system.
2. Select CD function.
3. Press [STOP] button at channel A, [MP3 BOOSTER] button and [RETURN] button at channel B simultaneously.
4. “FACTORY MODE” will be displayed for a moment, entering the mode.
POWER AMPLIFIER CIRCUIT DIAGRAM
STK412-740-E
CLICK ON THE IMAGE TO ZOOM IN 

Posted By: FRANK at 03:45
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