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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Saturday 8 February 2020

REPAIRING / SERVICING TV PHILIPS 20PFL4122

Technical description and composition of the PHILIPS 20PFL4122 TV, type of panel and applicable modules. The composition of the modules.
PHILIPS
Model: 20PFL4122 / 10
Chassis / Version: TPS1.0E LA
Panel: LC201V02
Inverter (backlight): LIPS
PWM Inverter: OZT1060GN (20n) pl
MOSFET Inverter: 4606 (8 pin)
Power Supply (PSU): 715T2572 -1 PWPFA66GR1P
PWM Power: EA1530 (8H) PL
MOSFET Power: BD7R16
MainBoard: 715T2229-2
IC MainBoard: CPU: MST96885LD-LF, DRAM: HY57V641620FTP-6, SPI Flash: 25L8005M2I
Tuner: FQ1216MEV
Control: RC2023611 / 01B 3139 238 14641
PHILIPS
Model: 20PFL4122 / 58
Chassis / Version: LC4.1E AC
Panel: A201SN02 V.5
Inverter (backlight): integrated into PSU
PWM Inverter: UBA2070T (16pin)
Power Supply (PSU): BL6L70PS10 / J2 3122 427 24741
PWM Power: TY72011AP2 (14pin)
MOSFET Power: P16NF06 P5NK50Z
MainBoard: 3139_123_60192 3139 123 60192 Wk534.3
IC MainBoard: CPU: TDA15021H1 / N1C91; Scaler: GM5221H-LF
Tuner: UR1316S / A 3139 147 23021A
Control: RC2023615 / 01 3139 238 15051
Technical Specifications 20PFL4122
PHILIPS 20PFL4122
General recommendations for repairing TV LCD
Like all other televisions, it is advisable to start PHILIPS 20PFL4122 / 58 with a careful inspection of both external and internal elements and modules. Visible damage to elements can sometimes suggest directions for troubleshooting even 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.
If the power supply module BL6L70PS10 / J2 3122 427 24741 fails, the external manifestations may be different, for example, PHILIPS 20PFL4122 / 58 does not turn on at all and there is no indication of the indicator lights on the front panel. In the absence of swollen filter capacitors of the secondary rectifiers, the diagnostics of the power supply should always be started by checking the fuse and, if it is broken, it is first necessary to check the rectifier bridge diodes and the power switch P16NF06 P5NK50Z for the possibility of an avalanche or thermal breakdown.
In most cases, a breakdown of the N-Fet converter key does not occur for no reason and you should look for other faulty circuit elements that could provoke a defect. This can be dried electrolytic capacitors in the primary circuit, and faulty damper elements, as well as dangling resistors or punched semiconductor elements in the stabilization circuits. Possible defective chip PWM TY72011AP2 (14n) UBA2070 (16n) pl from the manufacturer.
If the power module uses an active KKM circuit (power factor control), troubleshooting is somewhat more complicated.
If the PHILIPS 20PFL4122 / 58 TV does not have an image, but there is sound, the malfunction should be sought in the backlight lamp power converter (inverter). It is also necessary to check the serviceability of the electrolytic capacitors of the filter of the secondary rectifiers of the PSU (power supply) for excessive ESR.
When repairing the LIPS inverter, it is often necessary to disable the protection for diagnostics, which, for the purpose of fire safety, turns it off in any emergency situation, for example, during a malfunction or uneven wear of the lamps, which makes it difficult to find a defect.
When diagnosing with the protection off, special precautions must be taken, because there is a risk of failure of the inverter power elements. After the diagnosis, it is imperative to restore the protection circuits for the inverter to operate normally.
Diagnosis and repair of the motherboard is carried out by checking the operability of the stabilizers or power converters of the module chips. In some cases, a software update is required.
Attention to the owners! Attempts at self-repair of the PHILIPS 20PFL4122 / 58 TV are not recommended by the manufacturer and can lead to serious negative consequences!


Service manual and schematic diagram 20PFL4122/58 Chassis LC4.1E AC 

MODELS: 20PFL5122, 23PFL5322


 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 20PFL4122 device:
Installed matrix (LCD panel) A201SN02 V.5.
To power the backlight, a converter is used, combined with a power supply, controlled by a UBA2070T PWM controller (16pin).
The necessary supply voltages for all nodes of the PHILIPS 20PFL4122 television are generated by the BL6L70PS10 power supply module or its analogs using TY72011AP2 microcircuits (14pin) and power switches of the P16NF06 P5NK50Z type.
MainBoard - the main board (motherboard) is a module 3139_123_60192, using CPU chips: TDA15021H1 / N1C91; Scaler: GM5221H-LF and others.
The tuner UR1316S / A 3139 147 23021A provides the reception of television programs and tuning to channels.
Additional technical information about the panel:
Brand: AUO
Model: A201SN02 V5
Type: a-Si TFT-LCD, Panel
Diagonal size: 20.1 inch
Resolution: 800x600, SVGA
Display Mode: TN, Normally White, Transmissive
Active Area: 408x306 mm
Surface: Antiglare
Brightness: 450 cd / m²
Contrast Ratio: 700: 1
Display Colors: 16.2M (6-bit + FRC), CIE1931 72%
Response Time: 11/5 (Tr / Td)
Frequency: 60Hz
Lamp Type: 6 pcs CCFL Without Driver
Signal Interface: TTL (1 ch, 8-bit), 50 pins
Voltage: 5.0V


Posted By: FRANK at 07:29
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