Akai-AMU04-int-adj维修电路原理图.pdf
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Akai-AMU04-int-adj维修电路原理图.pdf
V I I . A M P L I F I E R A D J U S T M E N T AKAI AMU-04 10 1. CENTER OFF-SET VOLTAGE 2. BAR METER SENSITIVITY ADJUSTMENT ADJUSTMENT (Refer to Figs. 5, 6) (Refer to Figs. 5, 6) Connect the Digital Voltmeter or DC Voltmeter to The Meter Switch should be set to “x1”. the Speaker terminal. Adjust the VR1 (1 kB) on the Connect a load resistor (RL: 8 ohms) to the Speaker Main Amp P.C Board, so that the Voltmeter reading terminal, and input 1 kHz through the AUX terminal. is 0 10mV. Adjust the VR2 (2 kB) on the Main Amp P.C Board until the voltage at both ends of the load resistor is 10.95 V (AC voltmeter) where the Power Meter indicate 15 watts. RadioFans.CN 收音机爱 好者资料库 V I I I . C L A S S I F I C A T I O N O F V A R I O U S P . C B O A R D S AKAI AMU-04 11 1. P.C BOARD TITLES AND IDENTIFICATION NUMBERS P.C Board title P.C Board Number Main Amp P.C Board AMU-4001 A Push Switch P.C Board AMU-4001 B LED P.C Board (B) AMU-4001C Selector P.C Board AMU-4002 Tone Control P.C Board AMU-4003 Pin Jack P.C Board AMU-4005 Fuse P.C Board (U/T) AMU-4006 Fuse P.C Board (CSA, AAL) AMU-4058 Fuse P.C Board (JPN) AMU-4060 Fuse P.C Board (CEE, UK, SAA) AMU-4059 LED P.C Board (A) AMU-4007 Slide Volume P.C Board AMU-4008 Loudness P.C Board AMU-2003 Bar Meter P.C Board AMU-2006 Chart-1 RadioFans.CN 收音机爱 好者资料库
