Check the preamp. transistors.
Without preamp. R246 not burned : Problem is in preamplificators.
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
I don't understand,need two multimeters?
One on speaker terminal and second on ic107.....
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
I don't understand,need two multimeters?
One on speaker terminal and second on ic107.....
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try to connect multimeter to output terminals (speaker connection). try to adjust OUTPUT OFFSET VOLTAGe.
what is the voltage? when speakers are not connected.
If it's too small. perhaps 1,2milivolt. Perhaps, some capacitors may be dead. 22.000uf or c154? But, this is new for me. I have a very small click when open the NAD. Is delay circuit working?
what is the voltage? when speakers are not connected.
If it's too small. perhaps 1,2milivolt. Perhaps, some capacitors may be dead. 22.000uf or c154? But, this is new for me. I have a very small click when open the NAD. Is delay circuit working?
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