Technical description and composition of the PHILIPS 42PFL3605 TV, type of panel and applicable modules. The composition of the modules.PHILIPS
Model: 42PFL3605 / 60 42PFL3605H
Chassis / Version: TPM4.1E LA
Panel: LC420WUY (SC) (B1) code 116 p / n: 932227575682
Inverter (backlight): 715G3812-P02-H20-003U
PWM Inverter: UBA2071AT (24)
MOSFET Inverter: 11N60ES
Trans Inverter: 080GL52T929
Power Supply (PSU): 715G3812-P02-H20-003U 996510034022
PWM Power: TNY277PN (7), SG6961SZ (PFC), 1271P (8)
MOSFET Power: 11N60ES
MainBoard: 715G3786-M1A-000-004X 996510034108
IC MainBoard: 24C32
Tuner: TAFT-S712D
Control: Remote: 2422 549 02454 RC4747; IR: 715G3851-R01-000-004B
Specifications 42PFL3605
PHILIPS 42PFL3605
General recommendations for repairing TV LCD
PHILIPS with the TPM4.1E LA chassis, like other televisions, it is advisable to start repairing with a careful examination of the external and internal elements and modules. Sometimes, based on visible changes in the components of the device, it is possible to draw some conclusions and determine the direction of further troubleshooting even before the necessary measurements are taken. If ring cracks are detected in the soldering of the terminals of the elements or dangling connecting tracks, swollen capacitors or charred resistors - all this can be characteristic signs of the causes or consequences of an already known typical malfunction.
If the power supply module 715G3812-P02-H20-003U 996510034022 fails, the external manifestations may be different, for example, PHILIPS 42PFL3605 does not turn on at all and there is no indication of the indicator lights on the front panel. With the same symptoms, the stabilizer (converter) of the power supply to the control processor may be faulty. In the absence of swollen filter capacitors of the secondary rectifiers, the diagnostics of the power supply should be started by checking the fuse and, if it is broken, it is first necessary to check all the power semiconductor elements of the primary circuit - diodes and transistors 11N60ES for the possibility of avalanche or thermal breakdown.
It should be remembered that in the practice of repair, usually the power switches in switching power supplies (SMPS) do not fail due to their poor quality and, in such cases, it is necessary to look for the cause that led to a malfunction and provoked a breakdown of the key. Most often, the culprits of the accident are dried electrolytic capacitors or dangling resistors in the primary circuit, or the TNY277PN (7) SG6961SZ (8) 1271PCTE (8) PWM controller chip itself may be faulty. It is also necessary to check all the semiconductor elements of the stabilization circuit in the primary and secondary circuits.
In cases where the PHILIPS 42PFL3605 TV has lost an image, and the sound is there and all other functions are operational, there is a possibility of a malfunction of the inverter (converter for powering the backlight). When you turn on the TV, the image may appear briefly and immediately disappear. It must be borne in mind that with such manifestations, the lamps themselves also fail, the malfunction of which can be detected by replacement, by connecting to the connectors for diagnostics that are known to be serviceable and suitable in power. It should be remembered that in cases of disconnection of the inverter protection (for diagnostic purposes) there is a risk of failure of the power elements of the inverter and special care should be taken. After carrying out repairs, the protection circuit must be restored for further safe operation of the TV.
If the motherboard 715G3786-M1A-000-004X 996510034108 is faulty, first of all it is necessary to check all the linear stabilizers or power converters of its chips, and also, if necessary, update the software. Sometimes you can check the health of MB only by replacement. Sophisticated MB board repair (SSB) is in some cases possible and practiced by repairmen. To do this, check and, if necessary, replace failed elements. BGA chip malfunctions are usually easy to detect by warming up.
One of the most common typical defects on the TPM4.1E LA chassis motherboard is caused by the use of the G973-120 linear stabilizer (G973-120ADJF11U) to power the processor in standby mode (3.3 V). Perhaps the problem is caused by poorly selected thermal conditions, or poor quality microcircuit.
External manifestations: the TV does not turn on and no indicators light up, although the power supply is working. At the output of the G973-120, a voltage of 3.3 V is underestimated or missing. It can be replaced by a more powerful 78R33 using heat sink and some design changes.
Attention! For users and owners of 42PFL3605 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-serviceability of the device.
Service manual and schematic diagram -----------------> 42PFL3605/60 Chassis TPM4.1E LA
Service manual and schematic diagram ----------------> PHILIPS Chassis TPM4.1E LA
MODELS: 32HFL3232D/10, 32PFL3205H/12, 32PFL3406H/60, 32PFL3605H/12, 42PFL3405H/12, 42PFL3605H/12, 47PFL3605H/12, 47PFL3605H/60
The appearance of the MainBoard 715G3786-M1A-000-004X is shown in the figure below:715G3786-M1A-000-004X
715G3786-M1A-000-004X can be used in TVs:
PHILIPS 32PFL3605/60 (Panel LC320WUY(SC)(B1) code 117 p/n: 932225774682), PHILIPS 42PFL3605/60 (Panel LC420WUY (SC)(B1) code 116 p/n: 932227575682).
PSU Advanced
The 715G3812-P02-H20-003U power supply module is made using the Power Factor Correction (PFC) scheme to eliminate multiple AC harmonics introduced into the power supply by the device. The PFC node is a Step-Up Converter based on the SG6961SZ PWM controller, which evenly distributes high-frequency pulses of the charging current of the electrolytic capacitor of the rectifier filter of the mains voltage over a period of 50 Hz. The current of its charge in this case will already be determined not by its reactance (usually 10-30 ohms for the network frequency), but by the elements of the converter. As a result, a change in the amplitude of the pulses (envelope) of the consumed current of the converter will repeat the shape and phase of the input sinusoidal voltage. The availability of an increased voltage (about + 380V) in the operating mode on the capacitor of the line filter indicates the serviceability of the PFC node.
The appearance of the power supply
Main features of the PHILIPS 42PFL3605 device:
Installed matrix (LCD panel) LC420WUY (SC) (B1) code 116 p / n: 932227575682.
To power the backlight, an inverter 715G3812-P02-H20-003U is used, it is controlled by the PWM controller UBA2071AT (24). A transformer 080GL52T929 is installed in the inverter converter. As power elements of the inverter, keys of the 11N60ES type are used.
The necessary supply voltages for all nodes of the PHILIPS 42PFL3605 television are generated by the 715G3812-P02-H20-003U power supply module or its analogs using TNY277PN (7), SG6961SZ (PFC), 1271P (8) microcircuits and 11N60ES power switches.
MainBoard - the main board (motherboard) is a 715G3786-M1A-000-004X module, using 24C32 chips and others.
The TAFT-S712D tuner provides TV reception and channel tuning !!!!!