Technical description and composition of the PHILIPS 19PFL4322 TV, type of panel and applicable modules. The composition of the modules.PHILIPS
Model: 19PFL4322 / 10
Chassis / Version: TPS1.0E LA
Panel: M190A1
Inverter (backlight): 715T2276-4
PWM Inverter: OZ9938GN (16 pin)
MOSFET Inverter: 9945N (8 pin)
Power Supply (PSU): 715T2276-5 PWPF942MR1P // 715T2276-4
PWM Power: LD7575PS (8pin)
MOSFET Power: SP20150R (diode double), K2996 (pit)
MainBoard: 715T2229-2
IC MainBoard: MST96885ALD-LF, HY57V641620FTP-6, ST24C32WP, STA333BW,
Tuner: FQ1216MEV / I H5 3139 147 26431C
Control: RC2023611 / 01B 3139 238 14641
Specifications 19PFL4322
PHILIPS 19PFL4322
General recommendations for repairing TV LCD
PHILIPS 19PFL4322 / 10 TV, as well as other electronic devices, it is advisable to start repairing from inspection of external and internal elements. Often, by the external signs and nature of some damage to the elements, it is possible to draw preliminary conclusions and determine a further algorithm for troubleshooting and localizing the malfunction before making the necessary measurements and taking oscillograms at control points. Electrolytic capacitors of filters with a swollen body, as well as ring cracks or a layer of coal on burned-out resistors formed in the soldered terminals of the heating elements, sometimes tell the repairman the causes of the malfunction and possible consequences.
If the PWPF942MR1P power supply module fails, the external manifestations may be different, for example, PHILIPS 19PFL4322 / 10 does not turn on at all and there is no indication of the indicator lights on the front panel. When diagnosing and repairing the power supply, first of all, replace the swollen capacitors of the filter of the secondary rectifiers and check the fuse and, if it is broken, it is necessary to identify the cause. Often in such cases, an avalanche (thermal) breakdown is detected in the power semiconductor elements of the module - rectifier diodes or power switch SP20150R (double diode), K2996 (pit).
Power switches in flyback converters fail extremely rarely for no reason and, if they are broken, it is necessary to look for a malfunction in the stabilization circuits by checking electrolytic capacitors, semiconductor devices, and resistors in the primary circuit. The reason may be a malfunction of the ID7575PS PWM controller microcircuit (8n PL), which can only be checked by replacing it with a new or obviously working one.
In cases using a power module with an active KKM, troubleshooting is sometimes somewhat more complicated.
If there is no image when PHILIPS 19PFL4322 / 10 is turned on, 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.
In most cases, the diagnosis and repair of the 715T2276-4 inverter is difficult due to the organization of protection, which turns it off in emergency cases to avoid fires during short circuits or breaks in high-voltage circuits and during depressurization of lamps. Often, repairmen block the protection circuits in order to make the necessary measurements at the inverter control points to identify the causes of the defect.
It should be remembered that in such cases there is a risk of failure of the power elements of the inverter and to take special care. After carrying out repairs, the protection circuit must be restored for further safe operation of the TV.
Diagnosis and repair of the motherboard is carried out by checking the operability of the stabilizers or power converters of the module chips. In some cases, a software update is required. In some cases, it is necessary to check or replace (if necessary) the elements of the MB board (SSB) - MST96885ALD-LF, HY57V641620FTP-6, ST24C32WP, STA333BW, Tuner FQ1216MEV / I H5.
Attention to the owners! Attempts at self-repair of the PHILIPS 19PFL4322 / 10 TV are not recommended by the manufacturer and can lead to serious negative consequences!
Service manual and schematic diagram 19PFL4322/10 Chassis TPS1.0E LA
MODELS: 15PFL4122, 19PFL4322, 20PFL4122
The appearance of the MainBoard 715T2229-2 is shown in the figure below:715T2229-2
715T2229-2 can be used in TVs:
PHILIPS 15PFL4122/10 (Panel T150XG01 V.4), PHILIPS 19PFL4322/10 (Panel M190A1), PHILIPS 20PF4122/10 (Panel LC201V02), PHILIPS 20PFL4122/10 (Panel LC201V02).
The appearance of the power supply
Main features of the PHILIPS 19PFL4322 device:
Installed matrix (LCD-panel) M190A1.
To power the backlight, an inverter 715T2276-4 is used, it is controlled by the OZ9938GN PWM controller (16 pin). As power elements of the inverter, keys of the type 9945N (8 pin) are used.
The necessary supply voltages for all nodes of the PHILIPS 19PFL4322 television are generated by the 715T2276-5 power supply module or its analogs using LD7575PS microcircuits (8pin) and power switches of the SP20150R type (double diode), K2996 (pit).
MainBoard - the main board (motherboard) is a module 715T2229-2, using microchips MST96885ALD-LF, HY57V641620FTP-6, ST24C32WP, STA333BW, and others.
The tuner FQ1216MEV / I H5 3139 147 26431C provides the reception of television programs and tuning to channels.
Additional technical information about the panel:
Brand: CMO
Model: M190A1-PSA
Type: a-Si TFT-LCD, CELL
Diagonal size: 19.0 inch
Resolution: 1440x900, WXGA +
Display Mode: TN, Normally White, Transmissive
Active Area: 408.24x255.15 mm
Surface: Antiglare (Haze 25%), Hard coating (3H)
Glass Depth: 0.70 + 0.70 mm
Transmissivity: 5.6% (with Polarizer)
Contrast Ratio: 1000: 1
Response Time: 1.5 / 3.5 (Tr / Td)
Signal Interface: RSDS (2 Channel), 55 pins
Voltage: 5.0V
