Manual control is normal, can't remote control, fault in the infrared remote control and infrared receiver circuit two parts AJGservice manual download site
(1) have such trouble. Shall, first of all, to check whether there is electricity, remote control transmitter battery contacts are in good condition. Then check that the emitter would work. Check one way is to use the same type television or a Hitachi video recorder with UC logo, see if transmitter can control. Without the above conditions, also can use a radio, about 910 KHZ, set to medium wave will be close to the radio remote control transmitter, press the remote control AJGservice manual download site
Continuous control function keys, such as volume, contrast, saturation, etc., the radio will receive transmitter 455 KHZ shot the second harmonic oscillator amplitude within 910 KHZ signal, then the speaker will be a continuous "must have" sound. When in the right direction, according to the distance is greater than 300 mm. When a radio near 910 KHZ, also can receive on three harmonic frequency of 1365 KHZ. Through experiments, the transmitter 怍 normal. AJGservice manual download site
(2) remote control receiving part inspection. Mainly check the infrared receiving put large IC1201 peripheral elements; D1201 ~ R1203 photocell D1201, resistance, capacitance C1201 ~ C1205; And output to the CPU IC1101 ICl201 7 feet 15 feet between components; Q1201 R1171. After inspection, found that IC1201 (2) feet outside AJGservice manual download site
Capacitance C1201 failure, reduce ICl201 gain, replace a new one after u F / 50 v capacitance, remote control back to normal.AJGservice manual download site