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故障现象 长虹NS728型,开机后数码显示正常,但无声音输出。 分析检修 ①功放电路中N1(TA7240AP)损坏;②解码电路中D1(USP3410)不良;③解码电路中N2(NE5532P)不良;④解码电路中N3(NE5532P)不良。 故障现象 长虹APS-
Fault phenomenon Changhong NS728 type, boot digital display normal, but no sound output. Analysis and Maintenance ① Power amplifier circuit N1 (TA7240AP) damage; ② decoding circuit D1 (USP3410) bad; ③ decoding circuit N2 (NE5532P) bad; ④ decoding circuit N3 (NE5532P) bad. Fault phenomenon Changhong APS-