LL T2020H Sharp LCD Monitor - How to reset - How to upgrade the firmware - SMPS circuit diagram

Power Supply circuit diagram - reset - software update - Exploded view - Sharp LL T2020H - LL T2020B LCD MONITOR

Resetting all adjustment values
All adjustment values can be returned to their original ex-factory values in one command.
1. Turn off the monitor power.
2. Press the MENU button and the button simultaneously, and while doing this press the power button (i.e. turn the power on). When [ALL RESET] appears on the screen, the reset is complete.
Notes:
- While ALL RESET is displayed, the control buttons are disabled.
- It is not possible to reset values when the adjustment lock is in place. Remove the adjustment lock before attempting to operate control buttons.
ADJUSTMENT menu reset
The adjustment values of the analog signal time’s ADJUSTMENT menu can be returned to their original ex-factory values.
1. Turn on the monitor power.
2. Press the MENU button and the button simultaneously. When [RESET] appears on the screen, the reset is complete.

Adjustment lock function
By disabling the control buttons (i.e. setting the lock) any attempted changes to adjusted values will be voided.
1. Turn off the monitor power.
2.While pressing the MENU button, press the power button (i.e. turn the power on).
Continue to press the button until [ADJUSTMENT LOCKED] appears on the screen. The lock is set when the message is displayed.
Note:
- When the lock is in place, all buttons other than the power button are disabled.
Adjustment lock release
1. Turn off the monitor power.
2.While pressing the MENU button, press the power button (i.e. turn the power on).
Continue to press the button until [ADJUSTMENT UNLOCKED] appears on the screen. The lock is released when the message is displayed.
Checking product information
A model name (MODEL), a serial no. (S/N), and usage time (USAGE TIME) of the monitor can be checked.
1.Turn the power off.
2.While pressing the button, press the monitor's power button (i.e. turn the power on).
3.Checking done: MENU button
Note:  note that the indication of usage time at purchase may not be 0 (zero), as a result of factory inspection and other activities during manufacture.

SMPS Schematic

LVDS

ADC

Exploded view

Installation of Pivot Software
For Windows
1. Quit all applications being used.
2. Load the accessory CD-ROM into the CD-ROM drive of the computer.
3. Open the [My computer] CD-ROM.
4. Double click on the [Pivot] folder.
5. Double click on [SETUP.exe].
6. Click [Next].
7. Choose [I accept the tems in the License Agreement].
8. Click [Next].
9. Input your Customer information [User Name] and [Organization].
10. Click [Next].
11. Click on [Install].  Installation will begin.
12. When the message indicating installation is finished is displayed, click [Next].
13. Click on [Finish].
14. Click on [Yes] and restart the computer.
For Macintosh
1. Quit all applications being used.
2. Load the accessory CD-ROM into the CD-ROM drive of the computer.
3. Open the CD-ROM.
4. Double click on the [Pivot] folder.
5. Select the desired language.
6. Double click on [Install MacPortrait].
7. Drag the [MacPortrait Install] icon onto the desired disk.
Installation will begin.
8. When the message indicating installation is finished is displayed, click on [Restart].

marantz SR18 – Schematic – Adjustments - 5.1 AV Surround Receiver

Marantz AV Surround Receiver SR-18 U,K,KS

Rated Power
Stereo Mode FRONT (20 Hz − 20 kHz) ..... 8 ohms 140W / Ch (2ch driven)
Center (40 Hz − 20 kHz) ............................ 8 ohms 140W / Ch
Surround .................................................... 8 ohms 140W / Ch

Power Requirement ........................ AC 120V 60 Hz (U version)

AC 220 50/60 Hz (K version)
AC 230V 50 Hz (KS version)
Power Consumption ............470W
Dimension ( MAX )
Width ...................................18 inches (458 mm)
Height ..................................7-½ inches (190 mm)
Depth ...................................19-½ inches (496 mm)
Weight .................................49.7 lbs. (22.5 kg)

FACTORY mode (Tracking point memory)
This FACTORY mode can be use for measurement of the tuner circuit.
When the product is POWER ON, press both [ MEMO ] and [ DISPLAY OFF ] buttons simultaneously for more than 3 seconds.
FLD shows "FACTORY" for 3 seconds. Press [ PRESET ] button, FLD shows "PRESET SEL".

FLD segment check mode

This mode is available to check all luminous segments by the following steps.

1. When the product is FACTORY mode ( Refer to above mentioned "1. FACTORY mode"), press [ DISPLAY OFF ] button. FLD shows "SERVICE" for 2 seconds.

2. All segments and all LED light up for 5 seconds.

3. Each segment lights up step by step.

4. Press [ DISPLAY OFF ] button again, then this mode will be stopped and the product will be FACTORY mode.

Version of microprocessor (CPU)

This program is available to confirm the version of each CPU by the following steps.

QY01 (main) : When the product is POWER ON, press both [ CL ] and [ TREBLE ▼ ] buttons simultaneously over 3 seconds.

FLD shows the version of program code for QY01.

Q691 (DSP) : When the product is POWER ON, press both [ CL ] and [ BASS ▼ ] buttons simultaneously over 3 seconds.

FLD shows the version of program code for Q691.

Input and output test mode

This mode is available for the functions as shown in Fig 1 by the following steps.

1. When the product is FACTORY mode ( Refer to above mentioned "1. FACTORY mode"), press both [ MEMO ] and [ TREBLE▼] buttons simultaneously.

2. FLD shows "AUTO D1". By pressing both [ MEMO ] and [ TREBLE ▼ ] buttons simultaneously each time, the mode is changed.

Input selection mode (without setting to system setup menu)

This mode is available to select the input without setting to system setup menu by the following steps.

1. When FLD shows “AUTO D1” (4. Input and output test mode"), the input can be shifted by pressing [ MODE ] button for the remote commander only each time.

5.1 channels output mode

This mode is available to output the same signal from 5 channels, even though 2 channels audio signal comes in.

As the result, all channels output can be confirmed by using analog stereo signal or PCM audio signal.

AC-3 or DTS source is not necessary to output from any channel in this mode.

1. When FLD shows “ALL CH D1” (Refer to "4. Input and output test mode"), the input can be shifted by pressing [ MODE ] button of the remote commander. 

2. Supply to 2 channels PCM signal for digital input or 2 channels analog signal for analog input. But, Left channel and Right channel of input signal should be equal.

3. Then each output from the product is the same as the input signal. (Sub-woofer channel is respond to lower than 80Hz signal)

Circuit Diagram (Full)

Click on the Schematics to zoom in

Exploded view

Transistor MUTE mode
In mute situation on the product, output signal is muted by Volume control IC and muting transistor.
But, this mode is available to work the muting transistor only by the following steps.
1. When the product is FACTORY mode ( Refer to "1. FACTORY mode"), press [ MUTE ] button for remote commander only.
2. FLD shows “TrMUTE ON”, then muting transistor circuit is active only.
 How to reset the product
When the product is POWER ON, press both [ CL ] and [ DISPLAY OFF ] buttons simultaneously.
FLD shows "DEFAULT" for 3 seconds, and then all memories are cleared.

Thermostat circuit confirmation
1) When the product is POWER ON, remove the wire W701 from the connector J715 (P704).
2) FLD shows "ERROR PWR1".
3) Confirm the product is POWER OFF after 3 seconds.
4) Connect the wire W701 to the connector J715 (on P704).
5) Confirm the product is standby status.

Cooling fan confirmation
 Fan failure sensor confirmation
1) Set to be SPK output 1W from the front channel.
2) Connect the 1pin (LOCK) of the connecter JN10 (on P754) to chassis (GND level) by a wire.
3) After 6 seconds the SPK relay works, and the SPK output isn’t output.
Temperature sensor confirmation
1) Connect a resistor (470ohms 1W) between JN10 3pin (T-2CH) and DC +12Voltages.
2) Confirm the cooling fan starts working. (Status : JN09 between 1pin and 2pin = +7.5 volt, Fan speed = Low)
3) Remove the resistor.
4) Confirm the cooling fan stops.
5) Connect the resistor between JN10 4pin (T-3CH) and DC +12Voltage.
6) Confirm the cooling fan starts working again.
7) Remove the resistor.
8) Confirm the cooling fan stops.
9) Connect the resistor between JN10 3pin (T-2CH) and DC +12 Volt. And then connect another resistor between JN10
4pin (T-3CH) and DC +12 Volt.
10) Confirm the cooling fan starts working.
11) And then connect the resistor between JN10 2pin (SPEED) and DC +12 Volt.
12) Confirm the cooling fan changes to work with high speed. (Status : JN09 between 1pin and 2pin = +11.5 Volt, Fan speed = High)
Fan catching a foreign body sensor confirmation
1) Connect the resistor (470ohms 1W) between JN10 3pin (T-3CH) and DC +12 Volt.
2) Confirm the cooling fan starts working. (Status : JN09 between 1pin and 2pin=+7.5 Volt, Fan speed = Low)
3) Set to be SPK output 1W from the front channel.
4) Hold the cooling fan by hand and stop it.
Notes: Take care of wound in the hand.
5) After 6 seconds the SPK relay works and the SPK output isn’t output.

Circuit Diagram – How to Reset - Aiwa NSX-SZ70 COMPACT DISC STEREO CASSETTE RECEIVER

Aiwa NSX-SZ70 - NSX-SZ73 - COMPACT DISC STEREO CASSETTE RECEIVER

BASIC TAPE MECHANISM: 2ZM-3MK2 PR4NM  

BASIC CD MECHANISM: AZG-1 ZD3RDM

RESET

There are cases that the machine does not work correctly because the MICROCOMPUTER is not reset even though the AC power cord is re-inserted, or the software reset (pressing the STOP key + POWER key) is performed.  When the above described phenomenon occurs, it can lead to wrong judgement as if the MICROCOMPUTER is defective and to exchange the MICROCOMPUTER. In such a case, perform the forced-reset by the following procedure and check good or no good of the MICROCOMPUTER.

1 Remove the AC power cord.

2 Short both ends of the electrolytic capacitor C113 that is connected to VDD of the MICROCOMPUTER with tweezers.

3 Connect the AC power cord again. If the MICROCOMPUTER returns to the normal operation, the MICROCOMPUTER is good.

Note: The reference number or MICROCOMPUTER pin number of transistor (Q110) and electrolytic capacitor (C113) can change depending on the models. Be sure to check the reference numbers on schematic diagram before starting the discharging work.

BEFORE STARTING REPAIR

Forced discharge of electrolytic capacitor of power supply block

When repair is going to be attempted in the set that uses relay circuit in the power supply block, electric potential is kept charged across the electrolytic capacitors (C101, 102) even though AC power cord is removed. If repair is attempted in this condition, secondary defect can occur.  In order to prevent the secondary trouble, perform the following measures before starting repair work.

Discharge procedure
1 Remove the AC power cord.
2 Connect a discharging resistor at an end of lead wire that has clips at both ends. Connect the other end of the lead wire to metal chassis.
3 Contact the other end of the discharging resistor to the positive (+) side (+VH) of C101. (For two seconds)
4 Contact the same end of the discharging resistor as step
3 to the negative (-) side (-VH) of C102 in the same way. (For two seconds)
5 Check that voltage across C101 and C102 has decreased to 1 V or less using a multimeter or an oscilloscope.

[reference numbers (C101, C102) of the electrolytic capacitors can change depending on the models. Be sure to check the reference numbers of the charging capacitors on schematic diagram before starting the discharging work.]

Circuit Diagram

Power Supply and power amplifier

Pre-amplifier - Front panel

Front panel - Head Pre -Tuner

The Check items before exchanging the MICROCOMPUTER

Be sure to check the following items before exchanging the MICROCOMPUTER. Exchange the MICROCOMPUTER after confirming that the MICROCOMPUTER is surely defective.

Regarding the HOLD terminal of the MICROCOMPUTER

When the HOLD terminal (INPUT) of the MICROCOMPUTER is “H”, the MICROCOMPUTER is judged to be operating correctly.

When this terminal is “L”, the main power cannot be turned on. Therefore, be sure to check the terminal voltage of the HOLD terminal before exchange.

When the MICROCOMPUTER is not defective, the HOLD terminal can also go “L” when the POWER AMPLIFIER has any abnormalities that triggers the abnormality detection circuit on the MAIN C. B. that sets the HOLD terminal to “L”.

Good or no good judgment of the MICROCOMPUTER

1 Turn on the AC main power.

2 Confirm that the main power is turned on and the HOLD terminal of the MICROCOMPUTER keeps the “H” level or not.

3 When the HOLD terminal is “L” level, the abnormality detection circuit is judged to be working correctly and the MICROCOMPUTER is judged to be good. 

harman/kardon HK HS 2X0/230 - SMPS and Power Amplifier Circuit Diagram

harman/kardon (HS 210 system and HS 280 system) 2 x 65W 2.1 RECEIVER / HOME CINEMA SYSTEMS

The HS 210 and HS 280 systems DVD / Amplifier units are identical, named “HS 2X0” on the rear panel, but featuring a NO NAME-STICKER on the front panel. The only difference is the loudspeakers included in the system box. HS 210 comes with a HKTS 30 system in 2.1 configuration HS 280 comes with a HKTS 60 system in 2.1 configuration.

Speaker System
Frequency response: 45Hz–20kHz (-6dB)
SAT TS60 Satellites (for HS 280)
Recommended power: 10 ~ 120 watts
Impedance: 8 ohms nominal
Sensitivity: 86dB @2.83V/1 meter
Tweeter: One 19mm (3/4") dome, video-shielded
Midrange: Dual 75mm (3") flat-panel drivers, video-shielded
Dimensions
Height 299mm (11-25/32 inches)
Width 110mm (4-11/32 inches)
Depth 88mm (3-15/32 inches)
Weight: 1.5kg (3.3 lb)
Height measurement includes removable stands.
SAT-TS11 Satellites (for HS 210)
Recommended power: 10 ~ 120 watts
Impedance: 8 ohms nominal
Sensitivity: 86dB @ 2.83V/1 meter
Tweeter: One 1/2" (12mm) dome, video-shielded
Midrange: Dual 3" (75mm) drivers, video-shielded
Dimensions
Height 243mm (9-9/16 inches)
Width 100mm (3-15/16 inches)
Depth 92mm (3-5/8 inches)
Weight: 1kg (2.2 lb)
HKTS200SUB Subwoofer
Input rating: AC 220–240V~, 50/60Hz, 200W
Amplifier power: 200 watts RMS
Woofer: 8" cone in a sealed enclosure
External trigger input voltage: 3 ~ 30 volts AC/DC
Dimensions (H x W x D):
Height 353mm (13-29/32 inches)
Width 267mm (10-1/2 inches)
Depth 267mm (10-1/2 inches)
Weight: 9kg (19.8 lb)
Height measurement includes the product’s feet.

SMPS and Power Amplifier section schematic

The aspect ratio of the screen is wrong (picture vertically expanded) when you play a wide picture even though you set “TV DISPLAY” in the SETUP menu to "16:9".

• If you connect the system with the SCART cable, connect directly to the TV. Otherwise the auto switch function of the aspect ratio for the TV may not work.

• If the TV is not connected with a SCART cable to the HS, or if the auto switch function does not work you should turn the TV to "16:9" (if possible with your TV).

• Depending on the TV, you may not be able to change the aspect ratio. In that case (TV not adjustable to 16:9) do not select "16:9" in the TV Display. Then, no change of the aspect ratio is needed.

The volume goes down automatically and cannot be increased.

• The internal temperature is too high. Wait approximately one minute for the amplifier to reach normal working temperature.

The subtitle language cannot be changed when you play a DVD.

• Multilingual subtitles are not recorded on the DVD.

• Changing the language for the subtitles by the Subtitle button on the remote or the Subtitle line in the Player Menu is prohibited on the DVD. In that case the subtitle language must be selected by the main menu on the DVD.

The subtitles cannot be turned off when you play a DVD.

• Depending on the DVD, you may not be able to turn the subtitles off.

harman/kardon – BDS275 – BDS577 – How to update the firmware – Region Codes – Power Supply and Amp Schematic

BDS 275 / BDS 277

2.1-channel 3-D Blu-ray disc 2x65 watts receiver

BDS 575 / BDS 577

5.1-channel 3-D Blu-ray disc 5x65 watts receiver

Region code (BD/DVD)
Area where sold:
USA, Canada: A/1
Europe, Middle east: B/2
Korea, s. e. asia: A/3
Mexico, Latin america: A/4
Australia, New Zeland: B/4
Russia, India: C/5
China: C/6.

Supported Media Codecs

The BDs receiver can play media recorded in the following audio/video codecs:

• Mpeg 1, Layer 1

• Mpeg 2, Layer 2

• Mpeg 2, Layer 3

• H.264

• VC-1

• Mp3 (from CD-R/Rw, DVD+R/+Rw, BD-R/Re and UsB)

• Jpeg (from CD-R/Rw, DVD+R/+Rw, BD-R/Re and UsB)

• Divx 3.x/4.x/5.x (from CD-R/Rw, DVD+R/+Rw and UsB)

Power Supply and Amplifier Circuit Diagram

Front Left and right amp

Surround Left and Right amp

Amp CE

Click on the pircures to magnify

Software upgrade

Preparations to upgrade software

1) Switch the BDS unit ON, then press the "SETTINGS" and “Left” Buttons on the Remote Control to check the software version.

2) Download the newest upgrade package from the web site.

3) Unzip the software package, and copy the “UPG” folder to the root folder of a USB memory stick.

4) If you do not hav Procedure for software upgrade:

A) Upgrade software via USB memory stick:

1) Insert the USB stick in the USB connector on the front panel.

2) Switch the BDS unit ON and press the "SETTINGS" Button on the Remote Control.

3) In the menu system, navigate to “General Settings”-> “System” -> “System Upgrade” -> “USB”.

4) Press “OK” to start upgrade.

5) The BDS shuts down when the upgrade has been successful. This takes about two minutes.e a USB stick, burn the UPG folder onto a blank CDR.

B) Upgrade software via CDR:

1) Switch the BDS unit ON.

2) Insert the upgrade CD and press the"SETTINGS" Button on the Remote Control.

3) In the menu system, navigate to “General Settings”-> “System” -> “System Upgrade” -> “Disc”.

4) Press ‘OK” to start upgrade.

5) The BDS shuts down when the upgrade has been successful. This takes about five minutes.

C. Confirm the upgrade:

Press the "SETTINGS" and “Left” Buttons on the Remote Control to check the new software version info, and confirm the upgrade.

Samsung HT TKX35R – Home Theater System – Amp and Power Schematic

Samsung HTS HT TKX35R - SMPS, Power Amplifier, HDMI and MICOM Schematic

DVD flash Initialization and Update
Checking out MICOM & MPEG flash Version 
1) Play DVD-DISC or CD-DISC, 
2) Press 'MENU' button on the Remote Control, 
3) Press 8,9,5 one by one, then press 'ENTER.

DVD flash Initialization and Update (firmware)

1) Prepare DISC-CD ,DVD or the USB device that contains HEX file for Update.

2) Play the DISC or connect the USB cable, then 'Updating' will appear on the screen, then Power will go on and out.

3) Then DISC-TRAY will OPEN, then remove DISC or take off USB cable, making Unit 'NO DISC' state'.

4) Press 'STOP' button of Main Unit 5 seconds more, Display Indicator shows 'INITIALIZE' then Power go out.

5) Initialization complete.

Schematic - Micom

SMPS (Power)

HDMI

Amplifier

The HT-X30/HT-TX35 combines the convenience of multi-disc playback capability, including DVD-AUDIO, DVD-VIDEO, VCD, CD, MP3-CD, WMA-CD, DivX, CD-R/RW, and DVDR/RW, with a sophisticated FM tuner, all in a single player.

Anynet+ is a function that can be used to operate the main unit using a Samsung TV remote control, by connecting the Home Theater to a SAMSUNG TV using an HDMI Cable.  (This is only available with SAMSUNG TVs that support Anynet+.)

PM6010OSC marantz Integrated amplifier - Circuit Diagram

marantz PM6010F /N1B, /N1G, /T1B - Integrated amplifier Schematic.  Used ICs: NJM2068BB – AN7062AP 

Power output
RMS 8 Ohms ......50 W
DIN 8 Ohms ........55 W

IDLING CURRENT ADJUSTMENT

1. Before switching the power ON, set the master volume control to the minimum position and the balance volume to the center positions. Also set semi-fixed resistors R755(L ch) and R756(R ch) on PCB P701 to the center positions.
2. Each of the cement resistors R767(L ch) and R768(Rch) on the PCB P701 is provided with three test points.  Connect a digital voltmeter, set for the DC voltage input, to the test points at the two extremities of the three test points of R767 or R768.
3. After the setup above, switch the power ON, and adjust semi-fixed resistors R755(L ch) and R756(R ch) on PCB P701 according to the digital voltmeter reading. The target setting value is 10 mV(50 mA) for both the L ch and R ch.

Circuit Diagram - Click on the pictures to magnify

marantz ST15S1 - Schematic (Circuit Diagram) - How to enter Service Mode

ST15S1 marantz DAB-FM-AM TUNER - Circuit Daigram - Full

Used ICs: NM74LCX244 – AD1852 – ST232CDR – MB90350 – M24C64 – BU1924F – AK4103A – 74VHCU04 – 74HCT153 – NJM2068M

Factory mode – Service mode

To reset all settings to default status:

1. Press the Power On/Off button to turn On the power.

2. Press the Menu button and the Band select button at the same time; and pull the mains cord out from the wall AC socket.

3. Insert the Mains cord in again.

During the initialization, it is converted to DAB Auto Tuning state.

[if step 3 does not work, start over from step 1.

If the microprocessor has been initialized all the button settings are reset to the default values; the values set upon shipment from the factory.

Schematic (Circuit Daigram) - Click on the Schematics to Zoom In

Service Mode

Microprocessor version check

1. Connect the mains cord to the unit.

2. Press the Power On/Off button, while pressing the Menu and the Display button.

All segment of FLD will be light on.

Turn Gyro Tuning dial.  Version is displayed on FLD.

Turn off the power to quit Service Mode.

PHILIPS 40PFL3605 LCD TV SMPS (Power Supply) Schematic PHLE P986A

Philips 40 inch LCD TV Power Supply Regulator board Circuit Diagram. Used ICs: NCP1207 – HS01G – FSQ510 – OZ9977  -  F6N80 (Switching MOSFET) - PHLE P986A / GL IPB40 FHD LOW

SMPS part

B-L inverter part

Click on the schematics to magnify