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 15PF5121

Technical description and composition of the PHILIPS 15PF5121 TV, type of panel and applicable modules. The composition of the modules.
PHILIPS
Model: 15PF5121 / 58
Chassis / Version: LC4.1E AB
Panel: IDM69E1S51718 Rev: 01 QD15XL16
Inverter (backlight): DAC-12M018 B1F Rev 05
PWM Inverter: OZ960GN (20)
MOSFET Inverter: AO P605 BD6P3G (8)
Trans Inverter: 2804701300 DC6M F 0645A
Power Supply (PSU): DAC-12M018 B1F Rev 05
PWM Power: SG6841SZ (8pin)
MOSFET Power: BZ6GN4D, BZ6N19
MainBoard: 3139_123_60192 3139 123 60192 Wk534.3
IC MainBoard: GM5221H-LF, SM5301BS, 1517AW, LD1086-10, TDA15021H1 / N1C91, 29LV040CQC-70G (decal V1.20),
Tuner: UR1316S / A I H-3
Control: RC1683803 / 01H 3139 238 11771
PHILIPS
Model: 15PF5121 / 58
Chassis / Version: LC4.1E AB
Panel: T150XG01 V.3
Inverter (backlight): DAC-12M018 B1F
PWM Inverter: OZ960GN (20)
MOSFET Inverter: P605 (8),
Trans Inverter: 2804701300 DC6M B 0724A
Power Supply (PSU): DAC-12M018 B1F REV05 (3139 128 77302)
MOSFET Power: BD6N24 (8H)
MainBoard: 3139_123_60192 3139 123 60192 WK534.3
IC MainBoard: gm5221H-LF, 1517AW
Tuner: UR1316S / A H-3
Specifications 15PF5121
PHILIPS 15PF5121
General recommendations for repairing TV LCD
TV PHILIPS 15PF5121 / 58, like other electronic devices, it is advisable to start repairing from inspection of external and internal elements. It often happens that some damage to elements or connections helps determine the direction of the troubleshooting. Carbonized paint on the upper layer of resistors, electrolytic capacitors of rectifier filters swollen after boiling, cracked soldering at the terminals of heating elements or transformers can often suggest the cause of the defect and possible consequences.
In cases where the PHILIPS 15PF5121 / 58 TV does not turn on, does not respond to the remote control and buttons, no indicators on the front panel light up or blink, and there are no sounds and no signs of operability when turning on, the DAC-12M018 power supply module is most likely faulty B1F REV05 (3139 128 77302) or, which is somewhat rarer, there is no processor power on the motherboard (a typical defect of some PHILIPS TVs). When diagnosing and repairing the power supply, after replacing the swollen capacitors of the secondary rectifier filters (if any), you must first check the mains fuse. When it is broken, you should check the power switch BD6N24 (8n) and the rectifier bridge diodes for avalanche (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 PWM chip from the manufacturer.
When using a power factor correction unit (PFC) in the power modules, troubleshooting becomes somewhat more complicated and requires additional experience and knowledge of the device for their operation.
If PHILIPS 15PF5121 / 58 does not have an image, but there is sound and the TV is controlled by the remote control, a malfunction in the display backlight nodes is likely. The lamps or the power converter - inverter may be faulty. Often in such cases, when you turn on the TV, an image appears and immediately disappears. First of all, it is necessary to verify the operability of the electrolytic capacitors of the rectifier filter supplying the inverter, and check the LCD lamps by connecting external and obviously serviceable for diagnosis to the connectors.
Often, attempts to repair the DAC-12M018 B1F inverter are hampered by the fact that the fault diagnosis is complicated by the operation of its protection, which is designed to turn off the inverter in emergency conditions - when the lamps are depressurized, breaks or short circuits in high-voltage connections and other emergency situations. Lock protection to localize the defect is popular among repairmen.
When diagnosing 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.
Repair or diagnostics of the motherboard should begin by checking the stabilizers or power converters of its microcircuit. If necessary, you should update the software (software). In cases of attempts to repair the MB (SSB) board, it is necessary to check the health of its elements - gm5221H-LF, 1517AW, tuner UR1316S / A H-3, which may require replacement with new ones.
Owners and users of the PHILIPS 15PF5121 / 58 TV must remember that self-repair without special knowledge, skills and qualifications can be fraught with negative consequences, which can lead to complete non-repairability of the device!


Service manual and schematic diagram 15PF5121/58 Chassis LC4.1E AB

FOR MODELS:: 15PF4110, 15PF5120, 17PF4310, 20PF4110, 20PF4310, 20PF5120, 20PF5320, 23PF5320


 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 15PF5121 device:
Installed matrix (LCD panel) T150XG01 V.3.
To power the backlight, an inverter DAC-12M018 is used, it is controlled by the OZ960GN PWM controller (20). A transformer 2804701300 DC6M B 0724A is installed in the inverter converter. As power elements of the inverter, keys of the type P605 (8) are used.
The necessary supply voltages for all nodes of the PHILIPS 15PF5121 TV are generated by the DAC-12M018 power module or its analogs using power switches of the BD6N24 type (8n).
MainBoard - the main board (motherboard) is a module 3139_123_60192, using microchips gm5221H-LF, 1517AW and others.
The tuner UR1316S / A H-3 provides TV reception and channel tuning.
Additional technical information about the panel:
Brand: AUO
Model: T150XG01 V3 1 Compatible model
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 26%), Hard coating (3H)
Brightness: 450 cd / m²
Contrast Ratio: 500: 1
Display Colors: 262K (6-bit)
Response Time: 16 (Tr + Td)
Frequency: 60Hz
Lamp Type: 4 pcs CCFL Without Driver
Signal Interface: LVDS (1 ch, 8-bit), 20 pins
Voltage: 5.0V