Technical description and composition of the PHILIPS 37PFL5405H TV, type of panel and applicable modules. The composition of the modules.PHILIPS
Model: 37PFL5405H / 60
Chassis / Version: Q552.1E LA
Panel: LC370WUY (SC) (A1) code 277
Inverter (backlight): PLHD-P982A MPR0.0
Power Supply (PSU): PLHD-P982A MPR0.0
PWM Power: FSQ510
MOSFET Power: 6N80
MainBoard: 3104_313_63643 3104 313 63643 // 3104 328 62911
Tuner: 3104 328 64381
Control: 2422 5490 2543 boat
Specifications 37PFL5405H
PHILIPS 37PFL5405H
General recommendations for repairing TV LCD
It is recommended that you start troubleshooting diagnostics for the PHILIPS 37PFL5405H / 60 TV, as well as all other electronic devices, with an external inspection of both external and internal elements and modules. In some cases, visible external damage to the elements can suggest directions for troubleshooting and localizing the defect before starting the necessary measurements at the control points of the nodes of electronic circuits. In most cases, the repairman can guess the causes of the defect and possible consequences by the characteristic signs of typical TV defects, for example, ring cracks formed in the soldering of element leads, swollen rectifier filter capacitors, charred resistors and other circuit elements.
Power Module Repair
In cases when the PHILIPS 37PFL5405H / 60 TV does not turn on, does not respond to the remote control and buttons, any indicators on the front panel do not light up or blink, and there are no sounds and no signs of operability at all, the PLHD-P982A power supply module is most likely faulty MPR0.0 or, which is somewhat rarer, there is no processor power on the motherboard (a typical defect of some PHILIPS TV models). First of all, it is necessary to replace the swollen capacitors of the rectifier filters, if any. If the mains fuse is broken in the power supply, in most cases a breakdown of the power switch 6N80 is detected, which can be integrated with a PWM controller, or a separate field-effect transistor can be used. The rectifier bridge diodes and the electrolytic capacitor of the mains rectifier filter should also be checked.
It should be borne in mind that in the repair practice it is extremely rare that key transistors of the N-FET type fail for no reason that should be looked for by checking other components, for example, a breakdown of the key can provoke faulty elements of the damper circuits, either dried electrolytic capacitors or dangling resistors of the primary circuit of the PSU, involved in the stabilization process. In this case, all semiconductor elements of the strapping of the FSQ510 PWM regulator chip are subject to verification, which it is desirable to verify by replacement.
In cases using a power module with an active KKM, troubleshooting is sometimes somewhat more complicated.
Inverter Repair
If, when you turn on the TV, the image appears and immediately disappears, or is initially absent when you turn on, but there is sound and other functions work, there is a high probability of a malfunction of the inverter (power converter for the backlight). In such cases, the lamps, the inverter and the common power module are subject to verification, in which the electrolytic capacitors of the rectifier filter feeding the inverter should be checked.
Repairing the PLHD-P982A MPR0.0 inverter is difficult because in case of any malfunction or emergency, even if the lamps wear unevenly, a protection is triggered, which turns it off for fire safety. Diagnostics become impossible and protection needs to be disabled.
Turning off the protection for diagnostic purposes, it must be remembered that in this case there is a risk of failure of the power elements of the inverter. Upon completion of the diagnosis, all regular protection circuits should be restored.
Repair Main Board
In cases of attempts to repair the motherboard ssb 3104 328 62911, it is necessary to check the operability of the stabilizers or power converters of its microcircuits and, if possible, update the software (software).
Owners and users of the PHILIPS 37PFL5405H / 60 TV must remember that self-repair without special knowledge, skills and qualifications can be fraught with negative consequences that can lead to complete non-repairability of the device!
Service manual and schematic diagram 37PFL5405H/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 37PFL5405H device:
Installed matrix (LCD panel) LC370WUY (SC) (A1) code 277.
To power the backlight used inverter PLHD-P982A.
The necessary supply voltages for all nodes of the PHILIPS 37PFL5405H TV are generated by the PLHD-P982A power module or its analogs using FSQ510 microcircuits and 6N80 type power switches.
MainBoard - the main board (motherboard) is a module 3104_313_63643.
The tuner 3104 328 64381 provides reception of television programs and tuning to channels.