Kenwood KA7300 - Stereo amplifier circuit diagram [Schematic]

Schematic-Full

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AIWA NSX-A777- S777 - A767 SCHEMATIC DIAGRAM

Used ICs: M62445 FP-600D, BA7762AFS, BA3880FS, M62445 FP-600B, BU4551, LC876572V-5K554, BU2099, BA3835F, BU9990FS,  (2SB1625/2SB2SD2494 Audio Output Transistors)

Schematic-Power

Main schematics for NSX A777, NSX S777, NSX A767

Front control panel schematic

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Sharp RDENCA071WJZ – SMPS schematic – Sharp LC26GD4U

Used ICs: OZ961, NJM2125F, MP1580, MP1583, HA17431

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BN44-00304A - PSIV300402A Samsung LCD Monitor Circuit diagram

Used with Samsung LCD Monitor 943SN- 2043SN, Schematic

Used ICs: FSFM300N (SMPS controller IC), LTV817B (Opto isolator), SEM2105 and STM8324 (BL inverter control ICs)

Back-light inverter section circuit diagram

 Main power sinverter section circuit diagram

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Philips 06 AH 936/00/02/77 – Tuner-Amplifier-Record player-Tape recorder – Schematic

This is a very old model product from Philips, which is very rare and antique piece now.  I'm not sure about the availability of spare parts now.

Used ICs: TDA1072, TDA1576, TDA1059, TDA1029, TEA5580, 1AA180, BD677 and BD678 (Output transistor pair)

Tuner, input selector, Main amplifier and Power supply schematic

Record player and Taper recorder section schematic

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Clarion NX700, Clarion NX700E - 2-DIN Memory Navigation & DVD Multimedia Station With 7-inch Touch Panel Control – Error codes, Adjustments and more ….

Clarion NX700 (QY-5014B-A) (For North America: Region-1); Clarion NX700E (QY-5015E-A) (For Europe: Region-2)

Troubleshooting, Connection diagram, Error codes (Click on the tables to magnify)

Adjustments

Display panel adjustments

Error codes

Troubleshooting

Clarion NX700, Clarion NX700E - 2-DIN Memory Navigation & DVD Multimedia Station With 7-inch Touch Panel Control – full schematic

NX700 (QY-5014B-A) (For North America: Region-1)

NX700E (QY-5015E-A) (For Europe: Region-2)

Before repair or inspection, make sure to follow:

Use specified parts.

The system uses parts with special safety features against fire and voltage. Use only parts with equivalent characteristics when replacing them.

The use of unspecified parts shall be regarded as remodeling for which we shall not be liable. The onus of product liability (PL) shall not be our responsibility in cases where an accident or failure is as a result of unspecified parts being used.

Place the parts and wiring back in their original positions after replacement or re-wiring.

For proper circuit construction, use of insulation tubes, bonding, gaps to PWB, etc, is involved. The wiring connection and routing to the PWB are specially planned using clamps to keep away from heated and high voltage parts. Ensure that they are placed back in their original positions after repair or inspection.

If extended damage is caused due to negligence during repair, the legal responsibility shall be with the repairing company.

Check for safety after repair.

Check that the screws, parts and wires are put back securely in their original position after repair. Ensure for safety reasons there is no possibility of secondary problems around the repaired spots.

If extended damage is caused due to negligence of repair, the legal responsibility shall be with the repairing company.

Caution in removal and making wiring connection to the parts for the automobile.

Disconnect the battery terminal after turning the ignition key off. If wrong wiring connections are made with the battery connected, a short circuit and/or fire may occur. If extensive damage is caused due to negligence of repair, the legal responsibility shall be with the repairing company.

Cautions in soldering

Please do not spread liquid flux in soldering.  Please do not wash the soldering point after soldering.

Cautions in soldering for chip capacitors

Please solder the chip capacitors after pre-heating for replacement because they are very weak to heat. Please do not heat the chip capacitors with a soldering iron directly.

Cautions in handling for chip parts.

Do not reuse removed chips even when no abnormality is observed in their appearance. Always replace them with new ones.  (The chip parts include resistors, capacitors, diodes, transistors, etc).

Please make an operation test after replacement.

Cautions in handling flexible PWB

Before working with a soldering iron, make sure that the iron tip temperature is around 270 . Take care not to apply the iron tip repeatedly (more than three times)to the same patterns. Also take care not to apply the tip with force.

Turn the unit OFF during disassembly and parts replacement. Recheck all work before you apply power to the unit.

Cautions in checking that the optical pickup lights up.

The laser is focused on the disc reflection surface through the lens of the optical pickup. When checking that the laser optical diode lights up, keep your eyes more than 30cms away from the lens. Prolonged viewing of the laser within 30cms may damage your eyesight.

Cautions in handling the optical pickup

The laser diode of the optical pickup can be damaged by electrostatic charge caused by your clothes and body. Make sure to avoid electrostatic charges on your clothes or body, or discharge static electricity before handling the optical pickup.

 Laser diode

The laser diode terminals are shorted for transportation in order to prevent electrostatic damage. After replacement, open the shorted circuit. When removing the pickup from the mechanism, short the terminals by soldering them to prevent this damage.

 Actuator

The actuator has a powerful magnetic circuit. If a magnetic material is put close to it. Its characteristics will change. Ensure that no foreign substances enter through the ventilation slots in the cover.

 Cleaning the lens

Dust on the optical lens affects performance.

To clean the lens, apply a small amount of isopropyl alcohol to lens paper and wipe the lens gently.

Schematic (Complete circuit diagram) - Click on the schematics to zoom in

Panel  PWB

Main PWB

D/D PWB

Main PWB - Component & Solder side

KDL37V4000 Sony LCD TV SMPS circuit diagram – 1-876-635-12-SE2AG

Used Semiconductors and ICs: 2SK3797(FET), FA5501AN, MCZ3001DB, MM1431, MIP2H2PC123Y22FZW(Standby Opto-coupler)

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PWB Component and Foil side

TCL LCD27K76 and TCL 40E040 SMPS schematics

TCL 27 inch and 40 inch LCD TVs power supply schematics

TCL 27K76 SMPS

TCL 40E040 SMPS

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Orion TV29LB929 – 29 inch LCD/LED TV – how to enter service mode, adjustments, SMPS and backlight inverter schematic

Power supply and back-light inverter circuit diagram, service mode, Hotel mode, Reset, white balance adjustment – Orion TV29LB929 LED LCD TV - Used ICs in power and back-light inverter section circuit => MIP2M40MSSCF, FA5640N-C6-TE3, FMV09N90E(SMPS Switching FET), BD8779EFV-E2 (Backlight voltage control) 

HOTEL MODE FUNCTION
To set the Hotel mode, please follow the steps below.
1. Press the MENU ---> 1147 button on the remote control
2. Press the DOWN button on the remote control
3. Select the "Setup" menu , then press ENTER button
4. Select the "Hotel Mode" menu, Select "On".
5. The Hotel mode setting menu will appear
6. Using the UP/DOWN button on the remote control, select the desired mode. Then press the ENTER button.
7. Using the LEFT/RIGHT button on the remote control, set the mode to desired setting.
8. The Hotel mode has now been set up.

To reset the Hotel mode, follow the steps below.
1. Press the MENU => 1147 button on the remote control.
2. Press the DOWN button on the remote control,
3. Select the "Setup" menu , then press ENTER button.
4. Select the "Hotel Mode" menu, Select "On".
5. The Hotel mode setting menu will appear.
6. Press the DOWN button on the remote control,
7. Select the Clear Lock menu "Clear Lock" menu then press ENTER button , then press ENTER button.
8. The setting items has now been returned to initial value

CHECK FOR THE FIRMWARE VERSION

This unit is provided with the following SERVICE MODES so you can repair, examine and adjust easily

Do not adjust after other items except "Version Info".
1. Check of the VERSION and SUM DATA on the screen.
1 : Press the MENU è 1147 button on the remote control.
2 : Press the DOWN button on the remote control,
3 : Select the "Setup" menu , then press ENTER button.
4 : Select the "Version Info" menu, then press ENTER button.
5 : On the screen as shown in Fig:

ADJUSTMENT PROCEDURE

On-Screen Display Adjustment

1. Press the MENU => 1147 button on the remote control.

2. Press the DOWN button on the remote control

3. Select the "Video" menu, then press ENTER button on the remote control.

4. Select the "Color Temperature" menu , then press ENTER button on the remote control.

5. On the screen as shown in Fig:

PRINTED CIRCUIT BOARDS POWER (INSERTED PARTS)

SOLDER SIDE and POWER (CHIP MOUNTED PARTS)

SOLDER SIDE

SMPS and Back-light inverter board circuit diagram

WHITE BALANCE adjustments.
1. Place the set in Aging Test for more than 15 minutes.

2. Please select input About mode to adjust W/B.
3. Receive the gray scale pattern from the Pattern Generator.

4. Press the INPUT SELECT button on the remote control to set to the AV mode

5. Using the remote control, set the brightness and contrast to normal position.

6. Press the MENU è 1147 button on the remote control.

7. Press the DOWN button on the remote control.

8. Select the "Video" menu, and then press ENTER button on the remote control

ENTER button on the remote control ENTER button on the remote control.

10. Press the UP/DOWN button on the remote control to select the "R Gain", "G Gain", "B Gain", "R Offset", "G Offset", "B Offset

11. Adjust the LEFT/RIGHT button on the remote control to whiten the R Gain, G Gain, B Gain, R Offset, G Offset B Offset at each step tone sections equally..

12. Perform the above adjustments 10 and 11 until the white color is achieved.