NAD C-352 free download

File name C-352.pdf

January 2007 SERVICE MANUAL NAD C 352 C 352 STEREO AMPLIFIER STEREO AMPLIFIER ALIGNMENT PROCEDURE (C352) I. INITIAL ADJUSTMENT (No load connected) A. OUTPUT OFFSET VOLTAGE 1. Connect a DC Millivoltmeter to L Channel speaker output terminals. 2. Turn unit "ON" and adjust VR101 (100ohms) to get a reading on IC107 Pin 1, which must be <100mV. 3. Connect the DC Millivoltmeter to R Channel speaker output terminals and adjust VR102 (100ohms) to get a reading on IC108 Pin 1, which must be <100mV. B. IDLING CURRENT 1. Leave power "ON" for a minimum of 5 minutes. 2. Connect a DC Millivoltmeter to TP101 and TP102, then adjust VR103 (300ohms) for 5-6.5mV reading on meter. 3. Connect a DC Millivoltmeter to TP103 and TP104, then adjust VR104 (300ohms) for 5-6.5mV reading on meter. II. FINAL ADJUSTMENT Repeat procedure A and B for offset voltage and idling current alignment respectively. 2 3 IC401 P401B LM7805 1 1 3 1 I O 2 2 +5.6V G 2PIN3