Technical description and composition of the PHILIPS 32PFL7623D TV, type of panel and applicable modules. The composition of the modules.PHILIPS
Model: 32PFL7623D / 10
Chassis / Version: Q529.1E LA
Panel: LC320WXN-SAB1 code 136
Inverter (backlight): LC320 6632L-0494A PNL-T712A REV-1.3
PWM Inverter: BD989FS (32)
MOSFET Inverter: FDD8447L
Trans Inverter: L1-EH32-A-08415B-BJ
Power Supply (PSU): DPS-182CP DELTA 31391287946
PWM Power: NCP1606 (PFC), ICE3BS02 (PWM 8pin), DDA001B (PWM resonant)
MainBoard: 3104.303.51026 - 3104.313.62146
IC MainBoard: PNX8541E / 2414, STI7101BWC, EDD2516AETA, M29W640FT70N6, ISP1564HL
Tuner: TD1716F / BHXP-4
Specifications 32PFL7623D
PHILIPS 32PFL7623D
General recommendations for repairing TV LCD
Like all other televisions, it is advisable to start PHILIPS 32PFL7623D / 10 repairing with a careful inspection of both external and internal elements and modules. It often happens that some damage to elements or connections helps determine the direction of the troubleshooting. 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 the case when the 32PFL7623D / 10 does not turn on, does not respond to the remote control and the front panel buttons, does not blink bulbs and does not show any signs of operability, most likely in this case the DPS-182CP DELTA 31391287946 power supply module is faulty. 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 likelihood of an avalanche or thermal breakdown.
As a rule, the keys of flyback converters, which use an N-Fet field effect transistor on a separate radiator, or integrated with a PWM controller in a single chip, are reliable enough and rarely fail for no reason. The reasons for the breakdown of the key should be sought by checking other components of the circuit - electrolytic capacitors, resistors and semiconductor elements of the primary circuit. The PWM chip is verified by replacing it with a known good one.
In cases where the Power Factor Corrector (PFC) is used in the power supply, troubleshooting can be a bit 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.
Repair of the inverter LC320 6632L-0494A PNL-T712A REV-1.3 can often be somewhat complicated by the use of special protection circuits, which are designed to disconnect it in emergency cases for fire safety when the lamps are depressurized, or short circuits or breaks in high-voltage circuits and connections. Sometimes it becomes necessary for diagnostic purposes to block the protection circuits in order to be able to make the necessary measurements at the control points of the circuit.
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, it is necessary to check the operability of the stabilizers or power converters of its microcircuits and, if possible, update the software (software). In some cases, to repair the MB board (SSB), it may be necessary to replace chips, for example, the PNX8541E / 2414 with new or obviously good ones.
Remember! Attempts to self-repair by users of the PHILIPS 32PFL7623D / 10 TV without the appropriate qualifications and necessary experience can lead to serious negative consequences!
Service manual and schematic diagram 32PFL7623D/10 Chassis Q529.1E LA
The appearance of MainBoard 3104.303.51026 is shown in the figure below:3104.303.51026
3104.303.51026 can be used in TVs:
PHILIPS 32PFL7623D/10 (Panel LC320WXN-SAB1 code 136), PHILIPS 32PFL9603D/10 (Panel LK315D3LZ43), PHILIPS 32PFL9613 (Panel 32 ), PHILIPS 37PFL9603D/10 (Panel LC370WUF-SAB1 p/n: 932226169682), PHILIPS 37PFL9603D/10 (Panel LC370WUF SAB1 (LGPH) code 141), PHILIPS 42PFL7403S/60 (Panel p/n: 932225845000), PHILIPS 42PFL7623D/10 (Panel LC420WUE - SAA1), PHILIPS 42PFL9703D/10 (Panel LC420WUF-SAC1), PHILIPS 42PFL9703D/10 (Panel LC420WUF-SAC1 code 143), PHILIPS 42PFL9803H/10 (Panel T420HW02 V.1 code 149 p/n: 932226404682 ).
PSU Advanced
The DPS-182CP 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 is a Step-Up Converter based on the NCP1606 PWM controller, which evenly distributes high-frequency impulses 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 32PFL7623D device:
Installed matrix (LCD panel) LC320WXN-SAB1 code 136.
An LC320 inverter is used to power the backlight, it is controlled by the BD989FS PWM controller (32). The transformer L1-EH32-A-08415B-BJ is installed in the inverter converter. As power elements of the inverter, keys of the FDD8447L type are used.
The necessary supply voltages for all nodes of the PHILIPS 32PFL7623D TV are generated by the DPS-182CP power module or its analogs using NCP1606 (PFC), ICE3BS02 (PWM 8pin), DDA001B (PWM resonant) microcircuits.
MainBoard - the main board (motherboard) is a module 3104.303.51026, using chips PNX8541E / 2414, STI7101BWC, EDD2516AETA, M29W640FT70N6, ISP1564HL and others.
The tuner TD1716F / BHXP-4 provides reception of television programs and tuning to channels.
Additional technical information about the panel:
Brand: LG.Philips LCD
Model: LC320WXN-SAB1
Type: a-Si TFT-LCD, Panel
Diagonal size: 31.5 inch
Resolution: 1366x768, WXGA
Display Mode: S-IPS, Normally Black, Transmissive
Active Area: 697.68x392.26 mm
Surface: Antiglare (Haze 13%), Hard coating (3H)
Brightness: 500 cd / m²
Contrast Ratio: 1100: 1
Display Colors: 16.7M (8-bit), CIE1931 72%
Response Time: 8 (G to G)
Frequency: 60Hz
Lamp Type: 12 pcs EEFL Embedded (Inverter)
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 12.0V