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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Wednesday, 5 February 2020

REPAIR / SERVICING TV PHILIPS 15PF4121

Technical description and composition of the PHILIPS 15PF4121 TV, type of panel and applicable modules. The composition of the modules.
PHILIPS
Model: 15PF4121 / 58
Chassis / Version: LC4.1E AB
Panel: LC150X02 (TL) (01)
Inverter (backlight): DAC-12M018 B1F 3139 128 77302 LIPS
PWM Inverter: OZ960GN (20)
MOSFET Inverter: AC P605 (8)
Trans Inverter: 2804701300 DCGM F 0645A
Power Supply (PSU): DAC-12M018 B1F 3139 128 77302
PWM Power: SG6841SZ
MOSFET Power: MBRF10200 diode. MBRF20H200CT
MainBoard: 3139_123_60192 3139 123 60192 WK534.3
IC MainBoard: gm5221H-LF, LD1086-18, SM530 1BS,
Tuner: UV1318S / A I H-3
Specifications 15PF4121
PHILIPS 15PF4121
General recommendations for repairing TV LCD
Repair of the PHILIPS 15PF4121 / 58 TV should begin with a fault diagnosis, which involves a careful examination of the external and internal elements of the device. Specific external damage to some elements can sometimes indicate further actions to determine the malfunction of the TV and localize the defect before the necessary measurements are taken. Elements with visible damage, for example, capacitors swelled up after boiling the electrolyte, charred resistors in certain nodes of the circuit, as well as ring cracks in solders will help the master to guess the causes and possible consequences of the malfunction.
Malfunctions of the DAC-12M018 B1F 3139 128 77302 power supply module can be expressed in different ways, for example, PHILIPS 15PF4121 does not turn on at all and the control lights on its front panel do not light up and do not blink, there are no signs of operability. It is advisable to start the troubleshooting of the power supply module by checking the state of the electrolytic capacitors of the rectifier filters and the mains fuse. Defective capacitors should be replaced. If the mains fuse is broken, it is necessary to check first of all the power semiconductor elements - rectifier diodes and transistors MBRF10200-diode. MBRF20H200CT, which are often found in such a breakdown state in such situations.
A breakdown of the power switch of the pulse converter is often triggered by other elements, for example, in the stabilization or control circuits of this switch, as well as by the damper elements in its drain and TPI winding.
If the PHILIPS 15PF4121 does not have an image, but there is sound, there is a possibility of a malfunction of the backlight or power converter. You should also make sure that the electrolytic capacitors of the secondary rectifiers of the common power supply are working. When diagnosing a malfunction of the inverter with the protection off, special precautions must be taken, because there is a risk of failure of the power elements of the inverter. After the diagnosis, it is imperative to restore the protection circuits for the inverter to operate normally.
On the motherboard 3139_123_60192 3139 123 60192, in case of a malfunction, you should first check the performance of all the stabilizers and power converters of the microcircuits, and also, if necessary, update the software (software). If it is not possible to replace the MB board (SSB), you need to check the health of its elements - gm5221H-LF, LD1086-18, SM530 1BS,. Defective components should be replaced.
Before replacing the UV1318S / A I H-3 tuner, if there is no channel tuning, you must first check the software and the supply voltage at its terminals. It is also necessary to make sure that the tuner and processor can exchange data via the I2C bus
Attention! For users and owners of 15PF4121 TVs who do not have the appropriate qualifications, knowledge and experience, we categorically do not recommend attempting self-repair in order to avoid negative consequences that could lead to complete non-repairability of the device.


Service manual and schematic diagram 15PF4121/58 Chassis LC4.1E AB

 The appearance of MainBoard 3139_123_60192 is shown in the figure below:
3139_123_60192
3139_123_60192 can be used in TVs:
PHILIPS 20PF4110S/58 (Panel LC201V02 (SD)(B1)), PHILIPS 15PF4121/58 (Panel LC150X02 (TL)(01)), PHILIPS 15PF5120/58 (Panel LC150X02), PHILIPS 15PF5121/58 (Panel IDM69E1S51718 Rev:01 QD15XL16 ), PHILIPS 15PF5121/58 (Panel T150XG01 V.3), PHILIPS 20HF5474/10 (Panel LC201V02 (SD)(D1)), PHILIPS 20PF4121/58 (Panel LC201V02 (SD)(B1)), PHILIPS 20PF5120/58 (Panel A201SN02 V4), PHILIPS 20PF5320/58 (Panel LC200WX1 (SL)(01)), PHILIPS 20PFL4101S/60 (Panel LC201V02 SD B1), PHILIPS 20PFL4102S/60 (Panel LC201V02 (SD)(D1)), PHILIPS 20PFL4102S/60 (Panel LC201V02 (CD)(B1)), PHILIPS 20PFL4112S/60 (Panel LC201V02 (SD)(B1)), PHILIPS 20PFL4112S/60 (Panel LC201V02 SD D1), PHILIPS 20PFL4122/58 (Panel A201SN02 V.5), PHILIPS 20PFL5122/58 (Panel A201SN02 V.5), PHILIPS 23PFL5322/58 (Panel T230XW01 V.3), PHILIPS 23PF4321/58 (Panel T230XW01 V.2).
The appearance of the power supply
Main features of the PHILIPS 15PF4121 device:
Installed matrix (LCD panel) LC150X02 (TL) (01).
To power the backlight, an inverter DAC-12M018 is used, it is controlled by the OZ960GN PWM controller (20). A transformer 2804701300 DCGM F 0645A is installed in the inverter converter. As power elements of the inverter, keys of the type AC P605 (8) are used.
The necessary supply voltages for all nodes of the PHILIPS 15PF4121 TV are generated by the DAC-12M018 power supply module or its analogs using SG6841SZ microchips and MBRF10200-diode type power switches. MBRF20H200CT.
MainBoard - the main board (motherboard) is a module 3139_123_60192, using microchips gm5221H-LF, LD1086-18, SM530 1BS, and others.
The UV1318S / A I H-3 tuner allows you to receive television programs and tune to channels.
Additional technical information about the panel:
Brand: LG.Philips LCD
Model: LC150X02-TL01
Type: a-Si TFT-LCD, Panel
Diagonal size: 15.0 inch
Resolution: 1024x768, XGA
Display Mode: TN, Normally White, Transmissive
Active Area: 304.128x228.096 mm
Surface: Antiglare (Haze 13%), Hard coating (3H)
Brightness: 450 cd / m²
Contrast Ratio: 500: 1
Display Colors: 16.2M (6-bit + FRC)
Response Time: 5/11 (Tr / Td)
Frequency: 60Hz
Lamp Type: 4 pcs CCFL Without Driver
Signal Interface: LVDS (1 ch, 8-bit), 20 pins
Voltage: 5.0V
Posted By: FRANK at 08:59
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