REPAIRING AND NOT THROWING AWAY

REPAIRING AND NOT THROWING AWAY

Richtige Fernseher haben Röhren!

Richtige Fernseher haben Röhren!

In Brief: On this site you will find pictures and technical information about Service Modes, Circuit Diagrams, Firmware Update procedure, Disassemble procedure, Universal remote control set-up codes, Troubleshooting and more....

If you go into the profession, you will obtain or have access to a variety of tech tips databases HERE IT IS Master Electronics Repair !.

These are an excellent investment where the saying: 'time-is-money' rules. However, to learn, you need to develop a general troubleshooting approach - a logical, methodical, method of narrowing down the problem. A tech tip database might suggest: 'Replace C536' for a particular symptom. This is good advice for a specific problem on one model. However, what you really want to understand is why C536 was the cause and how to pinpoint the culprit in general even if you don't have a service manual or schematic and your tech tip database doesn't have an entry for your sick TV or VCR.

While schematics are nice, you won't always have them or be able to justify the purchase for a one-of repair. Therefore, in many cases, some reverse engineering will be necessary. The time will be well spent since even if you don't see another instance of the same model in your entire lifetime, you will have learned something in the process that can be applied to other equipment problems.
As always, when you get stuck, checking out a tech-tips database may quickly identify your problem and solution.In that case, you can greatly simplify your troubleshooting or at least confirm a diagnosis before ordering parts.

Happy repairing!
Today, the West is headed for the abyss. For the ultimate fate of our disposable society is for that society itself to be disposed of. And this will happen sooner, rather than later.

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..............The bitterness of poor quality is remembered long after the sweetness of todays funny gadgets low price has faded from memory........ . . . . . .....
Don't forget the past, the end of the world is upon us! Pretty soon it will all turn to dust!

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Wednesday 5 February 2020

REPAIR / SERVICING TV PHILIPS 37PFL3312S

Technical description and composition of the PHILIPS 37PFL3312S TV, type of panel and applicable modules. The composition of the modules.
PHILIPS
Model: 37PFL3312S / 60
Chassis / Version: LC7.1E LA
Panel: LC370WX4-SLB1
Inverter (backlight): LC370WX4-SLB1 PNEL-T704A REV-0.8 6632L-0456A
PWM Inverter: OZ9966SN (24H) PL
MOSFET Inverter: K4075
Power Supply (PSU): PLCD300P3 24573
PWM Power: TEA1601T (16), TEA1533AT (14), L6562D (PFC)
MOSFET Power: 2SK4075, F11NM60N, P4NK60ZFP, P6NK60ZFP
MainBoard: 3139_123_62611
IC MainBoard: TDA8932T. TDA9086T, SVP CX32 7332 LF,
Tuner: UV1318S / A
PHILIPS
Model: 37PFL3312S / 60
Chassis / Version: LC7.1E LA
Panel: LC370WX5 (SL) (B1)
T-CON: 6870C-0158A LC370WX4-SLA1
Inverter (backlight): PLHL-T605A / T606a
PWM Inverter: MSC1691AI (16), A393F (8)
MOSFET Inverter: FDD8447L
Power Supply (PSU): PLHL-T605A / T606a
PWM Power: FAN7382 (8), FA5501A (PFC), 1207A (8)
MOSFET Power: FDPF7N50U
MainBoard: 3139_123_62611 // 3139 123 62614 WK713.5
IC MainBoard: CPU: M30300SAGP; DRAM: EDS1216AGTA; NAND Flash: M29W320ET70N; EEPROM: M24C64; SOUND: TDA8932T
Tuner: UV1318S / A
Control: RC2023601 / 01 3139 238 14161, IR: 3139 123 6210.1v2 WK632.5
Specifications 37PFL3312S
PHILIPS 37PFL3312S
General recommendations for repairing TV LCD
It is advisable to start repairing the PHILIPS 37PFL3312S / 60 TV with a careful external examination of all its components and modules. Also subject to inspection are body elements, functional control buttons, screen, cords and connectors. Often, for certain external signs, it is possible to draw certain conclusions about the reasons for the failure of certain elements of the circuit even before the necessary measurements are made, which will determine the further algorithm for troubleshooting and localizing the defect. Carbonized paint on the upper layer of resistors, electrolytic capacitors of rectifier filters swollen after boiling, cracked soldering at the terminals of heating elements or transformers can often suggest the cause of the defect and possible consequences.
Power Module Repair
If the PHILIPS 37PFL3312S / 60 does not turn on, no control lights on the front panel light up or blink, therefore, there is a very high probability of a malfunction of the PLHL-T605A / T606a power module. 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 the power switch of the converter, which are often found in breakdown conditions in such situations.
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 FAN7382 (8) 5501A (8) 1207A (8) PWM controller chip, which can only be checked by replacing it with a new or obviously working one.
When using an active Power Factor Correction (CMC) circuit in the power module, the search for faulty elements is somewhat more complicated.
Inverter Repair
If the PHILIPS 37PFL3312S / 60 TV does not have an image, but there is sound, the malfunction should be sought in the power converter of the backlight (inverter). It is also necessary to check the serviceability of the electrolytic capacitors of the filter of the secondary rectifiers of the PSU (power supply) for an overstated ESR.
Repairing the PLHL-T605A / T606a inverter is difficult because in case of any malfunction or abnormal situation, even if the lamps are unevenly worn, protection is triggered, which turns it off for fire safety purposes. Diagnostics become impossible and protection needs to be disabled.
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.
We recommend the owners of the 37PFL3312S / 60 TV for repair only to qualified specialists with experience! Self-repair attempts without the appropriate knowledge and skills can lead to serious negative consequences!


Service manual and schematic diagram 37PFL3312S/60 Chassis LC7.1E LA 

FOR MODELS: 26PFL3312/10, 26PFL3312S/60, 26PFL5322/10, 26PFL5322/12, 26PFL5322S/60, 26PFL7332S/60, 32PFL3312/10, 32PFL3312S/60, 32PFL5322/10, 32PFL5322/12, 37PFL3312/10,37PFL3312S/60, 37PFL5322/10, 37PFL5322/12, 37PFL5322S/60, 42PFL3312/10, 42PFL3312S/60, 42PFL5322/10, 42PFL5322/12, 42PFL5322S/60.

PSU SCHEMATIC -------------------> PLCD300P3


 The appearance of MainBoard 3139_123_62611 is shown in the figure below:
3139_123_62611
3139_123_62611 can be used in TVs:
PHILIPS 26HF5445/10 (Panel V260B1-L03 code 068 p/n: 932224937682), PHILIPS 26PFL5322S/60 (Panel V260B1-L03 Rev.C3), PHILIPS 26PFL7332S/60 (Panel V260B1-L03 Rev.C3), PHILIPS 32PFL3312S/80 (Panel V315B1-L05 REV.C1), PHILIPS 32PFL5322S/60 (Panel LK315T3LZ93Q), PHILIPS 32PFL5322S/60 (Panel T315XW02 V.D), PHILIPS 32PFL5332S/60 (Panel T315XW02), PHILIPS 37PFL3312/10 (Panel LC370WX1-SLB1), PHILIPS 37PFL3312S/60 (Panel LC370WX4-SLB1), PHILIPS 37PFL3312S/60 (Panel LC370WX5 (SL)(B1)), PHILIPS 37PFL5322S/60 (Panel LC370WX4-SLB1), PHILIPS 37PFL5322S/60 (Panel LC370WX4-SLB1 T704A REV-0.8), PHILIPS 37PFL7662D/12 (Panel T370HW02 V.1), PHILIPS 42PFL3312S/60 (Panel LC420WX8 (SL)(B1)), PHILIPS 42PFL5322S/60 (Panel LC420WX7 SLB1 T703C), PHILIPS 42PFL7662D/12 (Panel LC420WU5 code 093), PHILIPS 42PFL7682D/12 (Panel LC420WU5), PHILIPS 47PFL5522D/12 (Panel LC470WX1-SLA2 code 109 p/n: 932225331682 (LGPH) B ).
PSU Advanced
The 37PFL3312S / 60 model uses a PLHL-T605A / T606a power supply unit using the PFC (Power Factor Correction) node - an active filter of higher harmonics of the consumed current. In fact, it is a step-up converter based on the 5501A PWM controller, which eliminates the charge current of the rectifier filter's electrolytic capacitor from the network directly through the open diodes when its charging current is determined by its reactance.
As a result of the operation of the converter, the envelope of the high-frequency pulses of the input current of the converter will repeat the shape and phase of the input voltage. The health of the PFC node can be indirectly judged by the presence of an increased constant voltage (about + 380V) on the capacitor of the rectifier network in operating mode.
The appearance of the power supply
Main features of the PHILIPS 37PFL3312S device:
Installed matrix (LCD panel) LC370WX5 (SL) (B1).
The matrix control uses the Timing Controller (T-CON) 6870C-0158A.
To power the backlight, an inverter PLHL-T605A is used, it is controlled by the PWM controller MSC1691AI (16), A393F (8). As power elements of the inverter, keys of the FDD8447L type are used.
The necessary supply voltages for all nodes of the PHILIPS 37PFL3312S TV are generated by the PLHL-T605A power module or its analogs using FAN7382 (8), FA5501A (PFC), 1207A (8) microchips and power switches of the FDPF7N50U type.
MainBoard - the main board (motherboard) is a 3139_123_62611 module, using CPU chips: M30300SAGP; DRAM: EDS1216AGTA; NAND Flash: M29W320ET70N; EEPROM: M24C64; SOUND: TDA8932T and others.
The UV1318S / A tuner allows you to receive television programs and tune to channels.
Additional technical information about the panel:
Brand: LG.Philips LCD
Model: LC370WX5-SLB1
Type: a-Si TFT-LCD, Panel
Diagonal size: 37 inch
Resolution: 1366x768, WXGA
Display Mode: S-IPS, Normally Black, Transmissive
Active Area: 819.6x460.8 mm
Posted By: FRANK at 07:03
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