Phone Repair Secrets 1. Free Technical Library Articles

DIRECTORY
Free library / Directory / Repair Secrets

Phone Repair Secrets 1

Secrets of repairing household radio-electronic equipment

PANASONIC KX-TC408RU-B

Fault: The call only works if the phone is on the base or if any button is pressed during the call.

Remedy: Check the crystals on the pipe processor: for start in standby mode and for frequency. Check the level of the charging signal on the processor, do not solder the legs of the processor and its strapping. Check the quartz resonator on the processor.

VOYAGER CL-1000

Fault:. The call does not work with an incoming call either on the base or on the handset.

Remedy: Probably loss of capacitance or leakage of electrolyte, which is in the optocoupler circuit, breakage of the capacitor in the input circuit of the optocoupler from the side of the telephone line. You can increase the capacitance, reduce the resistor in the same circuit. It is convenient to apply a change as a call of the order of 120V through a 1-2 kOm resistor if there is no simulator or a friend on another phone. If the phone rings when dialing on a parallel set, then all actions are reversed.

PANASONIC KX-F90B

Fault: Does not respond to any button, when turned on, it says that everything is in order and starts the answering machine. It does not receive a signal from the telephone network.

Remedy: Check if one of the buttons is pressed.

PANASONIC KX-TC1025

Fault: Decreased range.

Remedy: Replace C103 (receiver filter-input IC).

PANASONIC TX-9280

Fault: Weak indicator light, message about a bad battery, although it is fully charged.

Remedy: Defect in diode D1 according to the diagram. Check the presence of a supply voltage of 5,5 volts at the anode, the voltage at the cathode should be 5,2 volts. If the voltage at the cathode is below 4 volts, then the diode must be replaced.

SANYO CLT-55

Problem: The BATT indicator flashes even when the battery is fully charged. LOW

Remedy: Check processor and piping circuits.

PANASONIC KX-T3611, 3621

Fault: There is no connection between the handset and the base.

Remedy: Check the soldering of the transmitter quartz output in the tube.

PANASONIC KX-T4311

Fault: During normal operation of the handset and base, there is a malfunction in the answering machine.

Remedy: Check the operation of the power supply for increased voltage ripple.

NOVA RX-3610TR

Fault: The call is constantly on the handset.

Remedy: Leak in ringer node optocoupler on base unit.

SANYO CLT-85KM

Fault: In the handset, with charged batteries, the discharge LED blinks.

Remedy: Check processor and piping circuits.

SANYO CLT-75KM

Fault: Reduced range.

Remedy: Check the output transistor in the base.

SANYO CLT-55,65

Fault: Low battery light flashes, no connection, batteries are normal.

Remedy: Check processor and piping circuits.

Forward

Latest news of science and technology, new electronics:

Artificial leather for touch emulation 15.04.2024

In a modern technology world where distance is becoming increasingly commonplace, maintaining connection and a sense of closeness is important. Recent developments in artificial skin by German scientists from Saarland University represent a new era in virtual interactions. German researchers from Saarland University have developed ultra-thin films that can transmit the sensation of touch over a distance. This cutting-edge technology provides new opportunities for virtual communication, especially for those who find themselves far from their loved ones. The ultra-thin films developed by the researchers, just 50 micrometers thick, can be integrated into textiles and worn like a second skin. These films act as sensors that recognize tactile signals from mom or dad, and as actuators that transmit these movements to the baby. Parents' touch to the fabric activates sensors that react to pressure and deform the ultra-thin film. This ... >>

Petgugu Global cat litter 15.04.2024

Taking care of pets can often be a challenge, especially when it comes to keeping your home clean. A new interesting solution from the Petgugu Global startup has been presented, which will make life easier for cat owners and help them keep their home perfectly clean and tidy. Startup Petgugu Global has unveiled a unique cat toilet that can automatically flush feces, keeping your home clean and fresh. This innovative device is equipped with various smart sensors that monitor your pet's toilet activity and activate to automatically clean after use. The device connects to the sewer system and ensures efficient waste removal without the need for intervention from the owner. Additionally, the toilet has a large flushable storage capacity, making it ideal for multi-cat households. The Petgugu cat litter bowl is designed for use with water-soluble litters and offers a range of additional ... >>

The attractiveness of caring men 14.04.2024

The stereotype that women prefer "bad boys" has long been widespread. However, recent research conducted by British scientists from Monash University offers a new perspective on this issue. They looked at how women responded to men's emotional responsibility and willingness to help others. The study's findings could change our understanding of what makes men attractive to women. A study conducted by scientists from Monash University leads to new findings about men's attractiveness to women. In the experiment, women were shown photographs of men with brief stories about their behavior in various situations, including their reaction to an encounter with a homeless person. Some of the men ignored the homeless man, while others helped him, such as buying him food. A study found that men who showed empathy and kindness were more attractive to women compared to men who showed empathy and kindness. ... >>

Random news from the Archive

Power plant Bluetti AC500 & B300S 02.08.2022

The Bluetti brand announced the creation of a power plant with a capacity of 18 Wh. The name of the system presented the day before is AC432 & B500S.

To launch a serial assembly, the developer decided to raise funds through crowdfunding. Users who invest in the novelty will receive the product at a promotional price. Fundraising will be conducted on the Indiegogo platform.

One of the advantages of AC500 & B300S is the possibility of filling with energy from solar panels. The traditional method of charging from the mains is also present. In addition, it is possible to fill the system from a car cigarette lighter.

The station allows you to maintain the performance of various devices for a long period of time in the event of a power outage at home. The novelty is able to provide a significant reduction in electricity bills. A system with a total AC output power of 5000W can withstand power surges up to and including 10W without problems.

For charging portable devices and home appliances, the AC500 & B300S has over a dozen ports ranging from AC outlets to USB-C and USB-A.

To reach the limiting power, 6 batteries must be connected to the power plant. Charging time to 100% - 1 hour 15 minutes. You can track the progress of the process and remotely control the novelty through proprietary software.

The dimensions of the new power plant are 20,5" x 12,8" x 14,1". Weight - 30 kg.

Other interesting news:

▪ Annual acceleration of the rate of ice cover melting

▪ Sea water biodegradable plastic

▪ Single electric car

▪ Modeling the Structure of Solid State Batteries

▪ A new organ found in the human body

News feed of science and technology, new electronics

Interesting materials of the Free Technical Library:

▪ section of the site Intercoms. Article selection

▪ article Hidden loop. Tips for the home master

▪ article How did the stalls in the theaters of the Pushkin era differ from what we are used to? Detailed answer

▪ article Operation of vacuum pumps. Standard instruction on labor protection

▪ article Residual current devices (RCD). Directory

▪ article Ericsson T28 pinout. Encyclopedia of radio electronics and electrical engineering

All languages of this page

Home page | Library | Articles | Website map | Site Reviews