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 !

Wednesday, 10 April 2019

PIONEER DDJ-SX - DJ CONTROLLER – SERVICE MODE – FACTORY RESET – MEASUREMENT MODE

Pioneer DDJ-SX - DJ controller – Service mode – Factory reset – Measurement mode

Service mode
Method to enter
Press and hold the left DECK "SHIFT" button and the left "DECK 1" button, then Power-ON.
or
Press and hold the right DECK "SHIFT" button and the right "DECK2" button, then Power-ON.
The firmware version is displayed first. LED except it turn off.
Method to exit
Power-OFF
Note
When in this mode, the firmware version display appear first.
In this mode, it does not work to communicate with computer via USB.
In this mode, LED dimmer is not available.
Check of the Firmware Version
After this mode starts, the firmware version is displayed first.
The format of the firmware version is "x.xx". (x: decimal)
It is displayed by the Channel level indicators (Deck1/Deck2/Deck4).
Check of UI parts & LED
After checking the firmware version, you can check if each UI parts (button/jog dial/knob/fader etc.) are not abnormal.
All UI parts of top&front panel are objects to check.
Measurement mode
This is the mode to measure jog dial rotation time and the fluctuation of knobs/faders.
(1) Jog dial Rotation Time measurement mode
(2) Volume value fluctuation check mode.
Method to enter
Press and hold the "SHIFT"+"DECK3" buttons then Power-ON.
During this mode, "DECK 3" and "DECK 4" LEDs are lit.
Method to exit
Power-OFF
Jog dial Rotation Time measurement mode
This is the mode to measure the JOG rotation time which is specified at "Jog dial Performance specification".
In case of the left jog dial, the result are displayed at the left LEDs.
In case of the right jog dial, the result are displayed at the right LEDs.
The specified range is 100 ± 40 msec.
Method to measure
1. You spin Jog dial more than 33*7 = 231 rpm.
*1 In case of less than 231 rpm, it is failure. Then "SLIP" LED is lit.
*2 You must measure by either clockwize or counterclockwize.
2. The controller measures "T1".
*T1: The time that Jog dial rotation speed slow down from 100 rpm to 50 rpm.
3.The controller display result with three Channel level indicators. Refer to below.
The format of the result is "XXX" msec. (X: 0-999 msec .decimal)
It is displayed by the Channel level indicators (Deck1/Deck2/Deck4).
Volume value fluctuation check mode
Overview
Will be tested fluctuation of voltage (A/D conversion value) which is made each Fader and Rotary volume by Master level
indicator.
Use of this mode during repair
# For failure judgment of the rotary VRs
As a guide, amplitude values higher than +4 or lower than -4 may be judged as failure.
The VRs can be set to any position during measurement. Possible symptoms are shown below.
# The volume changes arbitrarily.
# Interrupted sound leakage occurs even if the volume is decreased to the minimum at the Master or Booth Monitor.
# The MIDI signal is output even if the corresponding VR is not operated.
# For operation check of a rotary VR after replacement.
Knobs under test operation
Knobs under test operation are filled blue as below.
Test detail
1. Choose the test subject by turn left and right Rotary selector.
The LED is lit with the following turns every 1 click.
Turn right: 1 > 2 > 3 > 5 > . . . . . > 37 > 39 > 1 > . . .
Turn left: 39 > 37 > 36 > . . . . . > 2 > 1 > 39 > . . .
Note: Regarding No.22, both LED are lit.
2. You can see what knob/fader is selected by Lighting LED on each button as shown in the above figure.
For example ,LED to test "SAMPLER VOLUME" fader is "MASTER CUE" button's LED.
3. When targeted knob is decided, push the Rotary selector and start observation of A/D conversion value.
Get the A / D conversion value immediately after the start. It will be reference value.
*A/D conversion value to be monitored is Raw data.
4. Start monitoring and later to monitor the A/D conversion value, do the following actions depending on its value with Master level indicator
Factory Reset
The following data is reset to the factory default settings by "Factory reset" operation.
Setting data in Utility mode Last memory of users
Method to reset
Press and hold the left DECK "SYNC" button and the right DECK "SYNC" button for 5 seconds.
Then factory reset starts and "SYNC"LEDs are lit.
After completing reset, "SYNC" LEDs are turned off.
Posted By: FRANK at 05:48
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