LG, TCL LCD TV SMPS schematics

Used ICs: FAN6754, SK2996 - F9222L, FA5501

TCL LCD TV circuit diagram

LG LCD TV SMPS circuit diagram

Transistorised High power stereo amplifier circuit diagram. Easily available components and semiconductors are used.

Used semiconductors: BC149C, BC239B, BC416C, BC148B, BC147A,  BC457, BD139, BD140, (BDP395, BDP396 Output Pair), (+38v, -38V supply)

Schematic

Sony ICF SW100E – SW100S – FM Stereo radio schematic and adjustment procedure - Disassemble - Exploded view

Sony ICF-SW100S – US, Canadian and Tourist Models

Sony ICF-SW100E/SW100S – AEP & E Models

Sony ICF-SW 100E – UK & Australian Models

FM Stereo/SW/MW/LW-PLL Synthesised Receiver

Disassembly

Part locations for electrical adjustments – AM section adjustment

Block diagram

FM section adjustment

Active antenna board

Main PWB

Tuner schematic

Control schematic

PWB-Control

Exploded view

EAX64583501 – LG LCD TV SMPS: Schematic

LG LED/LCD TV Power board EAX64583501 Circuit diagram - Used ICs  Used ICs: STR-A6053, NCP 1252

Two simple but powerful stereo amplifier circuit that beginners and hobbyist in electronics can try

Attack EX1200 – Stereo amplifier

Used transistors: XBF422, BD139, BD140, TIP31C, (2SC328 & 2SA1302) Output pair, (+58V, -58V Dual power supply)

One channel circuit shown.  The other channel is similar.

Attack MA3000 Stereo amplifier

Used transistors: 2SA1145, 2SC27055, 2SA1321, 2SC3334, 2SC4793, BD140, BD139, 2SA1837, (2SC5198 – 2SA1941 Output pair – 6 numbers/channel), LM339IC-signal indicator LED drive

HP s7650 CRT monitor – How to enter the service mode, schematic, adjustments

   Exercise care when servicing this chassis with power applied. Many B plus and high voltage terminals are exposed which, if carelessly contacted, can cause serious shock or result in damage to the chassis. Maintain interconnecting ground lead connections between chassis and picture tube dag when operating chassis.
   Certain HV failures can increase X-ray radiation. Monitor should not be operated with HV  levels exceeding the specified rating for the chassis type. The maximum operating HV specified for the chassis used in this monitor is  23.0KV ± 1KV  with a line voltage of 120/240 VAC. Higher voltage may also increase possibility of failure in HV supply.
It is important to maintain specified values of all components in the horizontal and high voltage circuits and anywhere else in the monitor that could cause a rise in high voltage or operating supply voltages. No changes should be made to the original design of the monitor.

   To determine the presence of high voltage, use accurate, high impedance, HV meter connected between second anode lead and CRT dag grounding device. When servicing the High Voltage System, remove static charge from it by connecting a 10K ohm resistor in series with an insulated wire (such as a test probe) between picture tube dag and 2nd anode lead.(AC line cord disconnected from AC power outlet.)

Factory preset Timings Adjustment:
A. Press MENU Key to show OSD window press Up or Down Key to switch the functional controls.
B. Press the Up Key to select the "MORIE" function, then press the SELEC Key. While do not release the SELEC Key until the OSD window changed to the Factory preset window.
C. The Factory preset window contains the following functional controls. Select one of the control. Then press the Up/Down Key to adjust its value for the optimum picture.

D. To switches the input signal to the other Timing Mode. Please follow step A ~ C to get the optimum picture.(H/V-size:312*234mm)

E. Select the "BACK " RETURN function and press the MENU Key, then the Factor Preset window will be returned to the original OSD window.(user's operating condition)
F. The setting data of the CONTRAST, BRIGHTNESS, ROTATION, and COLOR TEMPERATURE are common mode saved in the memory. Don't needed adjust it individual at every timing Mode and save in the memory.

Micro Controller Circuit
The IC101 contains a 6502/8051 8-bit CPU core, 512 bytes of RAM, 16K bytes of ROM,14 channel 8 bit PWM D/A converters, 2 channel A/D converters for key detection, one 8 bit pre-loadable base timer, internal H-sync and V-sync signals processor providing mode detection, watch- dog timer preventing system from abnormal operation, and an I²C bus interface.

Circuit diagram: PWB

15-Pin Display cable

H/V sync signals processor
The functions of the sync processor include polarity detection, H-SYNC & V-SYNC signals counting, Programmable SYNC signals output, free running signal generator. Pin39/Pin40 are for the H-SYNC and VSYNC input, Pin32/Pin33 will output the same signal as input sync signal without delay, and the polarity are setting in the positive. When no signal input, the Pin32 will output a 72Hz V-SYNC free run signal. The Pin33 will output a 48KHz H-SYNC free run signal. for the monitor testing use.

Deflection Circuit

The deflection circuit is achieved by a high performance and efficient solution IC 401 (STV9118) for this monitor. The concept is fully DC controllable and can be used in applications with a micro-controller solutions. The STV9118 provides sync. Processing with full auto sync. Capability, a flexible SMPS block and an extensive set of geometry control facilities. Further the IC generates the drive waveforms for DC coupled vertical boosters to the STV9302A.
Horizontal Oscillator
The oscillator is of the relaxation type and requires a capacitor of C409 at pin6. The free running frequency is determined by a resistor R412 from pin8 to ground.
PLL 1 Phase Detector
The phase detector is a standard one using switched current sources. It compares the middle of H-sync. With a fixed point on the oscillator saw-tooth voltage. The PLL loop filter C435, C437, R411 is connected to Pin9.
PLL2 Phase Detector
This phase detector is similar to the PLL1 detector and compares the line flyback pulse at pin 12 with the oscillator saw-tooth voltage. The PLL2 detector thus compensates for the delay in the external H-deflection circuit by adjusting the phase of the HDRV output pulses. The phase between H-flyback and H-sync can be controlled at pin5.

X-ray Protection
The X-ray protection input pin25 provides a voltage detector with a precise threshold. If the voltage exceeds this threshold for a certain time, an internal latch switches the whole IC into protection mode. In this mode several pins are forced into defined states:

Pin28 (BDRV) is floating
Pin26 (HDRV) is floating
Vertical Oscillator
The vertical free –running frequency is determined by the capacitance C613 at pin22. Usually the free-running frequency should be lower than the minimum trigger frequency.

Jamo MPA201, Jamo SW600E, Jamo A300 – Schematics [circuit diagrams]

Jamo MPA201(120V) circuit diagram

Used ICs: NE5532P, TL072CN, NJM4560L, [TIP35C, TIP36C Output transistor pair]

Jamo SW600E sub-woofer system amplifier circuit diagram

Used ICs: TL084, [BDV64B, BDV65B output transistor pair]

Jamo A300 stereo amplifier circuit diagram

Used ICs: TL084, [IRF640 x 6- FET output transistors]

Onida Oxygen 29 – 29 inch CRT TV circuit diagram (Schematic)

Used ICs: TDA9376, TDA8357/N1, MC24C16-BN6, TAEC-G021D(Tuner), TDA7297, NJM1136L, HFE4052BP, STR-F6655TDA6107

Vizio, LG and TCL LCD TV SMPS schematics

KLS 420SC-E SMPS (LG AND VIZIO 42 inch LCD TV power supply schematic

Used ICs: BD9897FS, LM209, FDD8447L(FET)

TCL 40E081-PWF SMPS

Used ICs: 13A650(FET), OB2273A

Hitachi LE29H306 – LCD TV SMPS schematic

Used ICs:  MIP2M40MSSCF, FA5640N-C6-TE3, BD8779EFV-E2

SMPS Circuit diagram

Back-light inverter 

PWB

RCA L32HD32D – power board schematic

Used ICs: MIP2F4(Switching regulator), PS2561AL 1-1-V(W) Optocoupler, SSC9501(Power control)