Utilities and reference books.

- Directory in .chm format. The author of this file is Pavel Andreevich Kucheryavenko. Most of the source documents were taken from the site pinouts.ru - brief descriptions and pinouts of more than 1000 connectors, cables, adapters. Descriptions of buses, slots, interfaces. Not only computer equipment, but also cell phones, GPS receivers, audio, photo and video equipment, game consoles and other equipment.

The program is designed to determine the capacitance of a capacitor by color marking (12 types of capacitors).

Transistor database in Access format.

Power supplies.

Pinout for ATX (ATX12V) power supply connectors with ratings and color-coded wires:

Table of contacts of the 24-pin connector of the ATX standard power supply (ATX12V) with ratings and color coding of wires

Comte	Designation		Colour	Description
1	3.3V		Orange	+3.3 VDC
2	3.3V		Orange	+3.3 VDC
3	COM		Black	Earth
4	5V		Red	+5 VDC
5	COM		Black	Earth
6	5V		Red	+5 VDC
7	COM		Black	Earth
8	PWR_OK		Gray	Power Ok - All voltages are within normal limits. This signal is generated when the power supply is turned on and is used to reset the system board.
9	5VSB		Purple	+5 VDC Standby voltage
10	12V		Yellow	+12 VDC
11	12V		Yellow	+12 VDC
12	3.3V		Orange	+3.3 VDC
13	3.3V		Orange	+3.3 VDC
14	-12V		Blue	-12 VDC
15	COM		Black	Earth
16	/ PS_ON		Green	Power Supply On. To turn on the power supply, you need to short this contact to ground (with a black wire).
17	COM		Black	Earth
18	COM		Black	Earth
19	COM		Black	Earth
20	-5V		White	-5 VDC (this voltage is used very rarely, mainly to power old expansion cards.)
21	+ 5V		Red	+5 VDC
22	+ 5V		Red	+5 VDC
23	+ 5V		Red	+5 VDC
24	COM		Black	Earth

Block diagram ATX power supply-300P4-PFC (ATX-310T 2.03).

ATX-P6 power supply diagram.

Power supply diagram API4PC01-000 400w manufactured by Acbel Politech Ink.

Power supply circuit diagram Alim ATX 250Watt SMEV J.M. 2002.

A typical diagram of a 300W power supply unit with notes on the functional purpose of individual parts of the circuit.

Typical 450W power supply circuit with active power factor correction (PFC) implementation for modern computers.

Power supply diagram API3PCD2-Y01 450w manufactured by ACBEL ELECTRONIC (DONGGUAN) CO. LTD.

Power supply diagrams ATX 250 SG6105, IW-P300A2, and 2 diagrams of unknown origin.

Power supply circuit diagram NUITEK (COLORS iT) 330U (sg6105).

Power supply circuit NUITEK (COLORS iT) 330U on the SG6105 microcircuit.

Power supply circuit diagram NUITEK (COLORS iT) 350U SCH.

Power supply circuit diagram NUITEK (COLORS iT) 350T.

Power supply circuit diagram NUITEK (COLORS iT) 400U.

Power supply circuit diagram NUITEK (COLORS iT) 500T.

Power supply circuit diagram NUITEK (COLORS iT) ATX12V-13 600T (COLORS-IT - 600T - PSU, 720W, SILENT, ATX)

Power supply circuit diagram CHIEFTEC TECHNOLOGY GPA500S 500W Model GPAxY-ZZ SERIES.

Power supply circuit diagram Codegen 250w mod. 200XA1 mod. 250XA1.

Power supply circuit diagram Codegen 300w mod. 300X.

Power supply circuit CWT Model PUH400W.

Power supply circuit diagram Delta Electronics Inc. model DPS-200-59 H REV: 00.

Power supply circuit diagram Delta Electronics Inc. model DPS-260-2A.

Power supply circuit DTK Computer model PTP-2007 (aka MACRON Power Co. model ATX 9912)

Power supply circuit DTK PTP-2038 200W.

Power supply circuit EC model 200X.

Power supply circuit FSP Group Inc. model FSP145-60SP.

Scheme of the standby power supply unit of the FSP Group Inc. ATX-300GTF model.

Scheme of the standby power supply unit of the FSP Group Inc. model FSP Epsilon FX 600 GLN.

Green Tech power supply circuit. model MAV-300W-P4.

Power supply diagrams HIPER HPU-4K580. The archive contains a file in SPL format (for the sPlan program) and 3 files in GIF format - simplified schematic diagrams: Power Factor Corrector, PWM and power circuit, oscillator. If you have nothing to view the .spl files with, use the .gif picture diagrams - they are the same.

Power supply circuits INWIN IW-P300A2-0 R1.2.

INWIN IW-P300A3-1 Powerman Power Supply Diagrams.
The most common malfunction of Inwin power supplies, the diagrams of which are given above, is the failure of the + 5VSB standby voltage generation circuit (standby). As a rule, it is necessary to replace the electrolytic capacitor C34 10μF x 50V and the protective zener diode D14 (6-6.3 V). In the worst case, R54, R9, R37, U3 microcircuit (SG6105 or IW1688 (full analogue of SG6105)) are added to the faulty elements.

Block diagram Power supply man IP-P550DJ2-0 (IP-DJ Rev board: 1.51). The standby voltage generation circuit available in the document is used in many other models of Power Man power supplies (for many 350W and 550W power supplies, the differences are only in cell ratings).

JNC Computer Co. LTD LC-B250ATX

JNC Computer Co. LTD. SY-300ATX Power Supply Diagram

Supposedly manufacturer JNC Computer Co. LTD. SY-300ATX power supply. The diagram is hand-drawn, comments and recommendations for improvement.

Power supply circuits Key Mouse Electroniks Co Ltd model PM-230W

Power Supply Circuits L & C Technology Co. model LC-A250ATX

LWT2005 power supply circuits on the KA7500B and LM339N microcircuits

Power supply circuit diagram M-tech KOB AP4450XA.

Power supply circuit diagram MACRON Power Co. ATX 9912 model (also known as DTK Computer PTP-2007 model)

Power supply circuit diagram Maxpower PX-300W

Power supply circuit diagram Maxpower PC ATX SMPS PX-230W ver.2.03

PowerLink power supply circuits model LP-J2-18 300W.

Power Master Power Supply Diagrams Model LP-8 ver 2.03 230W (AP-5-E v1.1).

Power Master Power Supply Diagrams Model FA-5-2 ver 3.2 250W.

Microlab 350W power supply circuit

Microlab 400W power supply circuit

Powerlink LPJ2-18 300W PSU Circuit Diagram

Power supply circuit diagram Power Efficiency Electronic Co LTD model PE-050187

Circuit diagram of the power supply unit Rolsen ATX-230

SevenTeam ST-200HRK power supply circuit

Power supply circuit diagram SevenTeam ST-230WHF 230Watt

SevenTeam ATX2 V2 PSU Schematic

If your computer's power supply fails, do not rush to get upset, as practice shows, in most cases, repairs can be done on your own. Before proceeding directly to the technique, we will consider the block diagram of the power supply unit and provide a list of possible malfunctions, this will greatly simplify the task.

Structural scheme

The figure shows an image of a block diagram typical for pulsed power supplies of system units.

Indicated designations:

• A - power filter unit;
• B - low-frequency rectifier with a smoothing filter;
• C - cascade of the auxiliary converter;
• D - rectifier;
• E - control unit;
• F - PWM controller;
• G - cascade of the main converter;
• H - high-frequency rectifier equipped with a smoothing filter;
• J - PSU cooling system (fan);
• L - output voltage control unit;
• K - overload protection.
• + 5_SB - standby power supply mode;
• P.G. - information signal, sometimes referred to as PWR_OK (required to start the motherboard);
• PS_On - signal controlling the start of the power supply unit.

Pinout of the main PSU connector

To carry out repairs, we also need to know the pinout of the main power connector, it is shown below.

To start the power supply, it is necessary to connect the green wire (PS_ON #) to any zero black wire. This can be done using a conventional jumper. Note that for some devices the color coding may differ from the standard one, as a rule, unknown manufacturers from China are guilty of this.

Power supply load

It must be warned that no load will significantly reduce their service life and may even cause damage. Therefore, we recommend assembling a simple block of loads, its diagram is shown in the figure.

It is advisable to assemble the circuit on resistors of the PEV-10 brand, their ratings: R1 - 10 Ohm, R2 and R3 - 3.3 Ohm, R4 and R5 - 1.2 Ohm. Cooling for resistors can be made from an aluminum channel.

Connect as load for diagnostics motherboard or, as some "craftsmen" advise, an HDD and CD drive is undesirable, since a faulty power supply unit can damage them.

List of possible malfunctions

Let's list the most common malfunctions typical for pulsed power supplies of system units:

• the mains fuse blows;
• + 5_SB (standby voltage) is absent, as well as more or less than the permissible;
• voltages at the output of the power supply (+12 V, +5 V, 3.3 V) are abnormal or absent;
• no P.G. signal (PW_OK);
• PSU does not turn on remotely;
• the cooling fan does not rotate.

Testing method (instruction)

After the power supply is removed from the system unit and disassembled, first of all, it is necessary to inspect for the detection of damaged elements (darkening, changed color, violation of integrity). Note that in most cases, replacing a burnt-out part will not solve the problem; a piping check will be required.

If these are not found, we proceed to the following algorithm of actions:

• checking the fuse. Do not trust visual inspection, but rather use a multimeter in dial mode. The reason why the fuse has blown out may be a breakdown of a diode bridge, a key transistor, or a malfunction of the unit responsible for the standby mode;

• checking the disk thermistor. Its resistance should not exceed 10 Ohm, if it is faulty, we strongly advise against putting a jumper instead. The impulse current arising in the process of charging the capacitors installed at the input can cause the diode bridge to breakdown;

• we test diodes or a diode bridge on the output rectifier, they should not have an open circuit and short circuit. If a malfunction is detected, the capacitors and key transistors installed at the input should be checked. Received by them as a result of the breakdown of the bridge AC voltage, with a high probability, disabled these radio components;

• checking the input capacitors of an electrolytic type begins with an inspection. The geometry of the body of these parts must not be disturbed. The capacity is then measured. It is considered normal if it is not less than the declared one, and the discrepancy between the two capacitors is within 5%. Also, the equalizing resistors soldered in parallel to the input electrolytes and equalizing resistors should be checked;

• testing of key (power) transistors. Using a multimeter, we check the base-emitter and base-collector transitions (the procedure is the same as for).

If a faulty transistor is found, then before soldering a new one, it is necessary to test its entire strapping, consisting of diodes, low-resistance resistances and electrolytic capacitors. We recommend changing the latter to new ones with a large capacity. A good result is obtained by shunting electrolytes using 0.1 μF ceramic capacitors;

• Checking the output diode assemblies (Schottky diodes) with a multimeter, as practice shows, the most typical malfunction for them is a short circuit;

• checking the output capacitors of the electrolytic type. As a rule, their malfunction can be detected by visual inspection. It manifests itself in the form of a change in the geometry of the housing of the radio component, as well as traces from the flow of electrolyte.

It is not uncommon for an outwardly normal capacitor to be unsuitable during testing. Therefore, it is better to test them with a multimeter that has a capacitance measurement function, or use a special device for this.

Video: correct repair of an ATX power supply.
https://www.youtube.com/watch?v=AAMU8R36qyE

Note that non-working output capacitors are the most common malfunction in computer power supplies. In 80% of cases, after replacing them, the power supply unit's performance is restored;

• the resistance is measured between the outputs and zero, for +5, +12, -5 and -12 volts this indicator should be in the range from 100 to 250 ohms, and for +3.3 V in the range of 5-15 ohms.

Refinement of the power supply unit

In conclusion, we will give some tips for improving the power supply unit, which will make it work more stable:

• in many inexpensive blocks, manufacturers install rectifier diodes by two amperes, they should be replaced with more powerful ones (4-8 amperes);
• Schottky diodes on channels +5 and +3.3 volts can also be supplied more powerful, but at the same time they must have an allowable voltage, the same or greater;
• weekends electrolytic capacitors it is advisable to change to new ones with a capacity of 2200-3300 uF and a rated voltage of at least 25 volts;
• it happens that on the channel +12 volts instead of diode assembly diodes soldered together are installed, it is advisable to replace them with a schottky diode MBR20100 or similar;
• if capacities of 1 μF are installed in the piping of key transistors, replace them with 4.7-10 μF, calculated for a voltage of 50 volts.

Such a minor revision will significantly extend the service life. computer unit nutrition.

And the price of some is slightly more expensive than the PSU itself. This is most likely due to its low price and power sufficient to power not only an office system unit, but also an average gaming system.

The power supply is shipped in a black cardboard box with orange labels. The kit includes a power cable, mounting screws and some short cable ties.

The box contains the minimum information: the number and purpose of the pads on the loops, graphs of voltages along the lines, a table of currents, and that's it. Of course, I would like to have great characteristics: ATX standard, efficiency, APFC availability, noise indicators, there is not even a manufacturer's country.

We open the box - a very sharp, unpleasant smell from plastic or paint. The unit itself has not been ventilated, but it is better to throw the box away immediately.

Unpainted metal body less than 1mm thick. A 120 mm fan is hidden behind the grill. On the front side there is a small grid in the form of a honeycomb, a power connector and a power button, a sticker - 230v. There is a sticker on the body which indicates the manufacturer: the Chinese company R-Senda.

The set of cables is minimal to provide power for a budget assembly.

To the main ATX connector 24-pin - 42 cm, detachable block 20 + 4 pins, this cable is the only one braided two-thirds of its length. The rest of the wires are held together with cable ties in one place near the connectors.
to processor socket 4 pin - 43 cm
to the power connector of the video card PCI-E 6 + 2pin - 51 cm,
two cables for connecting SATA, on the first one connector, on the second two more - 52 cm to the first, and 20 cm to the second, all connectors are straight.
and two cables with four molex connectors - 38 cm, plus 14 cm to the second, and on the second another 14 cm to the FDD power connector

The wires are marked with 18AWG, soft - there will be no problems with laying. Long enough for normal packing in a case with a top-mounted PSU.

We open the case.

The Super Fan model SDF12025H12S with a sleeve bearing is responsible for cooling. Connected to the board via a 2-pin connector. So if there is a problem with noise, it will be easy to replace. However, for this you will have to damage the warranty sticker.

The rotation speed is regulated depending on the temperature inside the power supply.

There is a separate board at the entrance with a part of the filters.

Fixed fuse included.
There is no power corrector. But maybe this is for the best, in office assemblies it will work without problems with any UPS.

On the case there is a sticker stating that the power supply is capable of operating within the voltage range of 220-240 V., which is very small, especially for our networks, so again, I repeat, it is better to connect via a UPS. There is no marking for identification on the board.

There are two input capacitors, 200 volt 1000 μF each from Teapo, LW series, designed for a temperature of 85 ° C. This is a well-known capacitor company, but unfortunately capacitors designed for Tmax = 85 ° C, as a rule, have a shorter life, and now they are practically not available.

The power semiconductor components are located on two curved and perforated aluminum heatsinks at the top.

Group voltage stabilization, one choke is responsible for voltage stabilization of +3.3 V, and the second - simultaneously +5 V, +12 V and -12 V.

At the outlet there are capacitors from Asia "X

On the reverse side, we see quite high-quality soldering.

Testing.

I checked the power supply on my computer, it cannot be called a full-fledged testing (especially after the review of the power supply unit from Zephon), still not a test laboratory:

Motherboard - MSI Z77A-G43
Processor - Core i7 2600K
Memory - two strips of 4GB
Video card - Palit GTX460
2 hard drives and one SSD

The video card has two 6-pin power connectors, so the second connector had to be connected via an adapter. The motherboard has 8-pin processor power, but it started without problems on the 4-pin contact.

The system consumes a little more than 300 W in load, so the power on the + 12V line should be enough. By the way, it is divided into two virtual lines.

I performed four tests in total:
1 - offline
2 - connected to a computer without load
3 - by the OSST program in the power supply test mode
4 - when overclocking the CPU up to 4GHz

The tests were carried out using a Chinese-made digital multimeter for 150 rubles).

As you can see from the graphs, all voltages are within the normal range, and the power supply copes well with such a rather productive system. In addition to test programs, I drove into toys. Although, to guarantee peace of mind, it is still better to take a power supply unit with a power reserve for such a system.

The fan turned out to be noisy; when connected independently without load, it was not audible, but when connected to a computer, the noise from the propeller blocked all other fans in the case.

Conclusions.

A budgetary, well-made power supply unit. Quite reliable, time-tested.
In its price category, it has practically no competitors.

By the way, I have already met with this power supply unit before, which I had about it. It has been working in a computer for the second year in extreme conditions). Pulls i3 and HD 6770, connected to a network without a UPS, with a voltage of 180-200V most of the time. A year ago I cleaned it from a huge layer of dust, the computer was "buggy", but after cleaning it works successfully.

I think the use of this model in ready-made assemblies, and in cases with a bundled power supply unit, is quite justified. But if you are assembling a system unit yourself, then it is better to take a closer look at other models.

Pros:

Low price
Time-tested reliability
Compliance with the declared characteristics
No voltage dips under load

Minuses:

Little information on the box
Noisy fan
Insufficient number of connectors
Bad smell

Thanks to the CSN company for the opportunity to learn new devices, develop, communicate with like-minded people.

Sometimes in such reviews, your discussions of the device in the comments are more valuable than the text of the review itself. And it pleases!