Overhaul of common faults of car audio
Overhaul of common faults of car audio 1. Fault phenomenon: No sound when receiving FM reception of Hongle HL509 advanced car audio. Analysis and maintenance: As the AM band reception is normal, it indicates that the shared power supply is normal. The fault is in all levels of the FM receiving circuit. Among them, the pin ⑨ of IC101 (TA8122AN) is the output terminal of the AM detection or FM frequency discrimination signal. Therefore, the fault should be in the pre-stage signal processing of IC101 pin ⑨, such as FM mid-amp, FM local oscillator, FM high-amp circuit. When the screwdriver touches the input terminal of the frequency modulation signal input of IC101 pin ⑥, the interference noise from the horn is weak, and the input and output pins of the filter CF201 are shorted with tweezers. 2. Failure phenomenon: Hongle HL509 advanced car audio FM / AM band can not be converted between each other. Analysis and maintenance: The specific manifestation of the fault is that when the band switch is switched to the AM receiving state, the FM band program is still received to 4. According to the investigation, the pin ⑧ of IC101 is the input terminal of the AM / FM band switching control signal, and its voltage is measured as the FM receiving voltage of about 3v south, and it should be about 7v of the amplitude receiving voltage when normal. It is suspected that the internal contacts of the band wind switch are bad. After repeated cleaning with alcohol, the test machine works normally and the fault is eliminated.
Antenk box header connector,Those products are used in more or less every known application within computer-, industrial-, telecommunication and specific automotive markets. This product technology allows cost effective connections between printed circuit boards based on removable or permanent connections based on a longterm proofed way of assembly. box header connectors are available with the traditionally used pitch of 2.54mm and the pitch of 2.00mm,1.27mm.
Antenk Box header/Ejector header Description and Application:
Box header
Ejector header
Box Header,Box Header Connector,Ecu Box Header Connector,Latch Box Header Connector,1.27mm Box Header Connector,2.00mm Box Header Connector,2.54mm Box Header Connector ShenZhen Antenk Electronics Co,Ltd , https://www.antenkconn.com
Box header/ ejector header connector, With DIP straight/vertical, SMT,Right angle, 2.54pitch, 2.0pitch, 1.27pitch,
The commonly used Pin ways have 6P,8P,10P,14P,16P,20P, 24P,26P,30P,34P, 40P,50P,64P.
Box header/ ejector header and IDC Flat Cable connectors are two of the most commonly used connectors. Box headers can be found in nearly all electronic equipments.
This is a IDC product which allows cost effective connections between circuit boards based on permanent connection (using transition connector) or removable connection
(Using for IDC flat cable connectors).
