Technical description and composition of the PHILIPS 37PFL5604H TV, type of panel and applicable modules. The composition of the modules.PHILIPS
Model: 37PFL5604H / 12
Chassis / Version: Q543.3E LA // Q543.1E LA 37PFL5604H / 60
Panel: LC370WUE SBA1 Code 201
Inverter (backlight): integrated into PSU; 980V 120mA
PWM Inverter: OZ9966GN
MOSFET Inverter: 5N50
Power Supply (PSU): PLHL-T845A
PWM Power: 1207A (NCP 1207A), FAN7630, FSQ510 (Standby)
MOSFET Power: 3N80, K3561
MainBoard: 313912364561 PNL 3139 123 64561 BD 3139 123 64571V5 WK850.5
IC MainBoard: PNX85433EH24 180, 24c16, TDA9996HL / C1, DRX3926K3, TPA3123D2
Tuner: HD1816AF / BHXP
Specifications 37PFL5604H
PHILIPS 37PFL5604H
General recommendations for repairing TV LCD
Any repair of electronic equipment usually begins with a careful external inspection of the device and troubleshooting. In this case, you should inspect all the elements of the PHILIPS 37PFL5604H / 12 TV, both internal and external. 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. Ring cracks in the soldering of the leads of the heating elements, swollen electrolytic capacitors, a charred paint layer on the resistors - all this for the repairman can be a hint in assumptions about the causes and consequences of the malfunction.
Power Module Repair
In the case when the 37PFL5604H / 12 does not turn on, does not respond to the remote control and front panel buttons, does not blink bulbs and does not show any signs of operability, most likely the PLHL-T845A power supply module is faulty in this case. 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 for the possibility of an avalanche or thermal breakdown.
If a breakdown of the power switch of the flyback converter of the power supply unit is detected, it should be remembered that it does not fail by itself without any reasons that should be sought by checking other elements of the primary circuit - electrolytic capacitors, a PWM controller, which can only be checked by replacement, and also other semiconductor elements (diodes, transistors, zener diodes).
If the power module uses an active KKM circuit (power factor control), troubleshooting is somewhat more complicated.
Inverter Repair
If there is no image when you turn on the PHILIPS 37PFL5604H / 12, or it appears for a second and disappears completely, but there is sound, most likely either the backlight lamps or their power converter (inverter) are faulty. It is necessary to check the electrolytic capacitors of the filter of the secondary rectifiers in the general power supply unit.
Diagnostics of the PLHL-T845A inverter can be difficult due to the operation of the protection, which is organized by the designers to prevent negative consequences or fires in emergency cases, for example, during short circuits or breaks in the lamp power supply circuit, as well as their possible leakage. To make the necessary measurements at control points or to take the necessary waveforms, repairmen have to block the protection circuits in order to be able to diagnose.
It should be remembered that when the protection is turned off, there is always a risk of failure of the power elements of the inverter during diagnosis. After repair, it is necessary to restore all standard converter protection circuits.
Repair Main Board
Repair of the motherboard PNL 3139 123 64561 BD 3139 123 64571V5 WK850.5 should 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.
Attention to users! Self-repair of a PHILIPS 37PFL5604H / 12 TV without the appropriate qualifications and experience can lead to its complete non-repairability!
Service manual and schematic diagram 37PFL5604H/12 Chassis Q543.3E LA
FOR MODELS: 37PFL5604H/60 - Q543.1E LA - PNL 3139 123 64421v4 BD 3139 123 64431v4 WK850.3
The appearance of MainBoard 313912364561 is shown in the figure below:313912364561
313912364561 can be used in TVs:
PHILIPS 32PFL5604H/12 (Panel LK315D3GA13 code 199 p/n: 93220268009682), PHILIPS 37PFL5604H/12 (Panel LC370WUE SBA1 Code 201), PHILIPS 42PFL5604H/12 (Panel LC420WUG (SB)(A1)).
The appearance of the power supply
Main features of the PHILIPS 37PFL5604H device:
Installed matrix (LCD panel) LC370WUE SBA1 Code 201.
To power the backlight, a converter is used, combined with a power supply, controlled by the OZ9966GN PWM controller. As power elements of the inverter, keys of the 5N50 type are used.
The necessary supply voltages for all nodes of the PHILIPS 37PFL5604H TV are generated by the PLHL-T845A power supply module or its analogs using 1207A (NCP1207A), FAN7630, FSQ510 (Standby) microcircuits and 3N80, K3561 power switches.
MainBoard - the main board (motherboard) is a module 313912364561, using chips PNX85433EH24 180, 24c16, TDA9996HL / C1, DRX3926K3, TPA3123D2 and others.
The HD1816AF / BHXP tuner provides television reception and channel tuning.
Additional technical information about the panel:
Brand: LG Display
Model: LC370WUE-SBA1
Type: a-Si TFT-LCD, Panel
Diagonal size: 37 inch
Resolution: 1920x1080, FHD
Display Mode: S-IPS, Normally Black, Transmissive
Active Area: 819.36x460.89 mm
Surface: Antiglare (Haze 10%), Hard coating (3H)
Brightness: 500 cd / m²
Contrast Ratio: 1400: 1
Display Colors: 16.7M / 1.06B (8-bit / 8-bit + Dithering)
Response Time: 5 (G to G)
Frequency: 60Hz
Lamp Type: 16 pcs EEFL Without Driver
Signal Interface: LVDS (2 ch, 8/10-bit), 51 pins
Voltage: 12.0V
