Technical description and composition of the PHILIPS 46PFL7605H TV, type of panel and applicable modules. The composition of the modules.PHILIPS LED
Model: 46PFL7605H / 60
Chassis / Version: Q552.1E LA
Panel: 9322 276 21682 code 271
Power Supply (PSU): PLDG-P977A 3PAGC10028A 2722 171 00986
MainBoard: 3104_313_63643 3104 313 63643 // 310432862931
Control: RC2683203 / 01
Specifications 46PFL7605H
PHILIPS 46PFL7605H
General repair guidelines for TV LCD LED
Repair of the PHILIPS 46PFL7605H / 60 TV is advisable to start with a careful external examination of both internal and external elements. Many visible changes in the state of the elements make it possible to determine the further direction of troubleshooting and localization of the defect. 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.
Sometimes the PHILIPS 46PFL7605H does not turn on. No control lights on the front panel are lit or blinking, the TV does not respond to the remote control and does not make any sounds or any signs of life when turned on. The most likely cause of the malfunction is the failure of the common power module 2722 171 00986. If it is working properly, you need to check the processor batteries on the SSB (Main Board). 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, which are often found in such a state of breakdown.
It should be borne in mind that in the practice of repair it is extremely rare that key transistors in switching power supplies (SMPS) fail for no reason that should be sought by checking other components, for example, a breakdown of the key can provoke faulty elements of the damper circuits, or dried electrolytic capacitors or dangling primary resistors BP circuits involved in the stabilization process. In this case, all semiconductor elements of the strapping of the PWM controller chip are subject to verification, which it is desirable to verify by replacement.
If the PHILIPS 46PFL7605H TV does not have an image, but there is sound, a malfunction in the LED backlight circuits of the panel 9322 276 21682 code 271 is likely. It is also necessary to check the operability of the electrolytic capacitors of the filter of the secondary rectifiers of the power supply unit (power supply unit) for excessive ESR.
Often in the absence of backlighting, disassembling the panel is required. It is necessary to check the serviceability of the transitions of the LEDs, as well as the reliability of the contact connections in the rulers and connectors.
It is impossible to detect a break in the LED line without disassembling the panel with a simple multimeter. The LEDs are connected in series and to open their transitions, a voltage of several tens of volts is required. Ideally, a current source is suitable for such purposes.
Repair of the motherboard 3104 328 14141 must begin with the diagnosis and verification of all linear stabilizers or power converters of its microcircuits. Sometimes it may be necessary to update the software (software) - flashing FLASH or EEPROM.
Once again, we remind TV users: you should not make attempts to repair it yourself without the appropriate knowledge, experience and the necessary qualifications! Trust the repair only to professionals with sufficient experience in the field of electronic equipment repair................
Service manual and schematic diagram 46PFL7605H/60 Chassis Q552.1E LA
The appearance of MainBoard 3104_313_63643 is shown in the figure below:3104_313_63643
3104_313_63643 can be used in TVs:
PHILIPS 32PFL5405H/60 (Panel LC320WUY (SC)(A1) code 278 p/n: 9322 257 14743), PHILIPS 32PFL6605H/60 (Panel LC320EUH(SC)(A6) code 298 (286 )), PHILIPS 32PFL7605H/60 (Panel LC320EUH (SC)(A6) code 265 ), PHILIPS 32PFL7605H/60 (Panel LC320EUH(SC)(A2) p/n: 932227890682), PHILIPS 32PFL7605H/60 (Panel LC320EUH-SHA2 code 265 p/n: 932227890682), PHILIPS 37PFL5405H/60 (Panel LC370WUY(SC)(A1) code 277), PHILIPS 37PFL7605H/60 (Panel LC370EUH(SC)(A1) p/n: 932227578682), PHILIPS 37PFL7605H/60 (Panel LC370EUH(SC)(A2)), PHILIPS 40PFL7605H/12 (Panel LK400D3LA93 (SRPJ) B p/n: 932227619682), PHILIPS 42PFL5405H/12 (Panel LC420WUY), PHILIPS 42PFL5405H/60 (Panel LC420WUY (SC)(A1) code 276 p/n: 932227573682), PHILIPS 46PFL7605H/60 (Panel 9322 276 21682 code 271), PHILIPS 52PFL8605D/77 (Panel 52 ).
The appearance of the power supply
Main features of the PHILIPS 46PFL7605H device:
Installed matrix (LED-panel) 9322 276 21682 code 271.
The formation of the necessary supply voltages for all nodes of the PHILIPS 46PFL7605H TV is carried out by the PLDG-P977A power supply module, or its analogues.
MainBoard - the main board (motherboard) is a module 3104_313_63643.