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

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All posts are presented here for informative, historical and educative purposes as applicable within fair use. NOTHING HERE IS FOR SALE !

Friday 8 March 2019

PIONEER VSX-1020-K - VSX-1025-K AV RECEIVER SERVICE MODE ERRORS IDLE CURRENT ADJUSTMENT AND AMPLIFIER CIRCUIT

PIONEER VSX-1020-K - VSX-1025-K AV RECEIVER SERVICE MODE ERRORS IDLE CURRENT ADJUSTMENT AND AMPLIFIER CIRCUIT

3D READY HD AUDIO RECEIVER 

PIONEER VSX-1020-K - VSX-1025-K 

SERVICE MODE - ERRORS - IDLE CURRENT ADJUSTMENT AND AMPLIFIER CIRCUIT   

Error Indications When an Abnormality in The Amplifier System is Detected
Item
FL Display
LED
Flashes
Detection
Method
Process After Detection
Description / Remarks
“AMP DC”
(“DC output from
SP term”)
detection

Flashing
"AMP ERR"
for 3 seconds


MCACC
LED

XDCERR
(Pin 80 of IC3004)
Detect "L"
1) Muting on, speaker relay off.
2) "AMP ERR" flashing
3) Shutdown after 3 seconds.
4) "MCACC" LED flashing
5) Power on is not acceptable.
To detect high DC output from amplifier damage
(defect status).
A process to protect speakers (for protection of
connected external devices).
For checking, refer to "How to enter release
mode" below.
If the DC detection port become “H” for
3 seconds, the unit will returns to normal
condition automatically.
“AMP overload”
detection.
N/A
iPod LED
(Pin 71 of IC3004) XOLERR
Detect "L"
1) Muting on, speaker relay off.
2) Shutdown immediately.
3) "iPod" LED flashing
4) Power on is acceptable.
To detect overloading (abnormal status) with
low-load driving or a short circuit of the speaker
terminals (for protection of the amplifier).

“Over Heat”
detection.
Flashing
"AMP
OVERHEAT"
for 3 seconds

Center
Blue
LED

TEMPERR5
(Pin 72 of IC3004)
Detect "H"
1) Muting on, speaker relay off,
2) "OVERHEAT" flashing
3) Shutdown after 3 seconds.
4) "Center Blue" LED flashing
5) Power on is acceptable after
1 minute.
To detect overheat of inner tempareture.
"Abnormality DC
voltage of the
Digital power
supply" detection

N/A

PQLS

XVDDERR
(Pin 70 of IC3004)
Detect "L"
1) Muting on, speaker relay off.
2) Shutdown immediately.
3) "PQLS" LED flashing
4) Power on is acceptable.
To detect the abnormality voltage of Digital
power supply circuit for the D-MAIN Assy.
"USB Overload"
detection
“Over Current"
No Flashing
N/A
USB ERR
(Pin M3 of IC800)
Detect "H"
1) Bass Power off
2) Display "Over Current"
3) Power on is acceptable
To detect the connected USB device is
overload. (over 500 mA)
BT Adapter
overload”
detection.

"ADP
OVERLOAD"
No Flashing

N/A

BTOL
(Pin N3 of IC800)
Detect "H"
1) Adapter port power off
2) Display "ADP OVERLOAD"
To detect the connected Blue Tooth Adapter
device is overload. (over 100 mA)
"HDCP of HDM
Error"
detection
Flashes
“HDCP
ERROR”
for 5 seconds

N/A

Read Register
value
1) Display "HDCP ERROR"
The monitor does not support HDCP type or
is in standby mode.
(Warning indication for HDMI Simplay)
"Analog Input
Over"
detection
“OVER”
Icon lights
1 second


N/A

DSP firmware
Detect
While the Icon lights 1 second,
when there is no ANALOG INPUT
OVER detection, the Icon stops
lighting and returns to normal
display.
To detect the over-input of the analog audio to
the A/D converter.
When the Icon lights frequently, output level of
the source equipment is high and a sound is
distorted. Turn on the Analog Att switch.


SERVICE MODE
TEST MODE
Detected protection history
Purpose
The numbers of detections for various protection processes are displayed.
How to enter/exit
Turn off the power to this unit by setting the main volume level to “---dB” and Multi-zone to “OFF”.
During Standby mode, simultaneously press and hold “MULTI-ZONE ON/OFF” and “ENTER” keys for 5 seconds to enter this mode.
HOW TO UPDATE FIRMWARE
Enter the UPDATE PANEL mode.
Check a current version.
Update it.
Update completed.
(Turn the power OFF automatically.)
Enter the UPDATE PANEL mode again.
Check an updated version.
Turn the power off.
(Release the UPDATE PANEL mode.)
AIN com (EMMA), SUB com (EVENT) and DSP Flash ROM Update by USB Memory and the Confirmation of the Version
UPDATE PANEL Mode (Version update)
Preparations
UPDATE PANEL Mode (Version update)
1. Copy the UPDATE FILE to the root directory of the USB Memory.
Note: NEVER copy several UPDATE FILES to the root directory of the USB Memory.
Copy only the corresponding UPDATE FILE.
Enter the UPDATE PANEL mode.
Check a current version.
2. Turn off the power to this unit by setting Multi-Zone to "OFF".
3. Connect the USB Memory to the USB terminal (A type) of the front panel.
Procedure
1. While holding down "TUNE↑" key on the front panel, press "STANDBY ON/OFF" key and moves to the UPDATE PANEL mode.
2. The updating process is as follows.
Front Panel Key
[DOWN] : TUNE key
[UP] : TUNE key
[LEFT] : PRESET key
[RIGHT] : PRESET key
If no key is pressed within 10 seconds while booting UPDATE PANEL, the UPDATE PANEL is finished and returns to the normal display. But the process does not become timeout and continues while "FILE searching" or "Updating process".
AMPLIFIER IDLE CURRNT ADJUSTMENT 
Measurement Points
Adjustment Points
Procedure
TP1201FL 3PIN : TEST POINT(+)
TP1201FL 1PIN : TEST POINT(–)

V1201FL
1 Turn on the power.
2 Perform aging for one minute.
3 Connect a digital voltmeter to the measurement point.
4 Turn the adjustment VR so that the voltage becomes
in 2.0 mV ± 0.2 mV.
Condition : No signal and no load)
TP1201FR 3PIN : TEST POINT(+)
TP1201FR 1PIN : TEST POINT(–)
V1201FL
TP1201C 3PIN : TEST POINT(+)
TP1201C 1PIN : TEST POINT(–)
V1201C
TP1201SL 3PIN : TEST POINT(+)
TP1201SL 1PIN : TEST POINT(–)
V1201SL
TP1201SR 3PIN : TEST POINT(+)
TP1201SR 1PIN : TEST POINT(–)
V1201SR
TP1201SBL 3PIN : TEST POINT(+)
TP1201SBL 1PIN : TEST POINT(–)
V1201SBL
TP1201SBR 3PIN : TEST POINT(+)
TP1201SBR 1PIN : TEST POINT(–)

V1201SBR
ADJUSTMENT POINTS 

AMPLIFIER CIRCUIT 
CLICK ON THE IMAGES TO ZOOM IN 

Posted By: FRANK at 03:45
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