IC30 Series Service Manual Product Description Set-Up/Test Procedures Component Lists Full Schematics PCB Overlays Australian Monitor. Private Bag 149 Silverwater NSW 1811.
www.australianmonitor.com.
IC30 Circuit Description The IC30 is a 30 watt mixer amplifier which operates on 230/240 VAC, 50Hz or 12 VDC via an external DC power supply source. The amplifier is supplied free standing with rubber feet but can be rack mounted via an optional rack mount kit (IC30RMK). The IC30 will deliver 30 watts into a load of 4 ohms, 70 volt or 100 volt line. The IC30 may be stacked to a maximum of four units high.
Muting The last two(2) terminals on the barrier strip are for muting. Channels 2 and 3 are muted when the two mute contacts are shorted together. The muting is done by a FET switch so there is no ramping. An optional VOX muting module (TX3010) is also available with has ramping. Phantom Power The IC30 does not have phantom power on the XLR’s. Tape Output A mono RCA output connector provides a line level output with a maximum of 350mV into 10k Ohms.
Rack Mouting Kit An optional rack mounting kit (IC30RMK) is available to mount the IC30 in a standard 19" equipment rack. Fuse Sizes Mains 230 VAC: 1 Amperes Slow Blow The DC fuse is located on the circuit board. This is a feature of the AMIS series amplifiers, which are equipped with a current limiting circuit preventing excessive DC currents, thus eliminating the risk of blowing high tension fuses.
C24 1u C25 LM1458 C5 1u R13 C10 1u +5V R42 50K 2 C13 1u 7 5 R14 4K7 R32 10K 1 R15 47K C11 330P AUX3 C15 1u R19 680R C16 1u R23 R31 6K8 1 2 R45 1K 3 IC3C 4066 7 1 3 C18 330P R21 22K +5V B C21 1u R24 4K7 4 R22 10R R25 47K 100V C 4 OHM R17 10K 10 11 8 +14VDC C34 47u 10R 6 R44 IC6 4 LM741 C30 0.
IC30 Parts List Designator C1 C10 C11 C12 C13 C14 C15 C16 C17 C18 C19 C2 C20 C21 C22 C23 C24 C25 C26 C27 C28 C29 C3 C30 C31 C32 C33 C34 C35 C36 C37 C38 C39 C4 C40 C41 C42 C43 C44 C45 C46 C47 C49 C5 C50 C6 C7 C8 C9 D1 D2-D5 D6 F1 Part Type 1u 1u 330P 330P 1u 1u 1u 1u 1u 330P 1u 1u 330P 1u 1u 1u 1u 100P 1u 1u 0.03 1200P 1u 0.47 0.47 47u 47u 47u 47u 82P 1u 2200u 2200u 330P 2200u 2200u 470u 100u 47u 10u 10u 10u 470u 1u 10u 330P 1u 1u 1u 12V .
F2 IC1 IC2 IC3 IC4 IC5 IC6 P1 P2 R1 R10 R11 R12 R13 R14 R15 R16 R17 R18 R19 R2 R20 R21 R22 R23 R24 R25 R26 R27 R28 R29 R3 R30 R31 R32 R33 R34 R35 R36 R37 R38 R39 R4 R40 R41 R42 R43 R44 R45 R47 R48 R49 R5 R50 R6 4.0A LM1458 LM1458 4066 TDA1516 TDA1516 LM741 X7 X5 47k 680R 680R 22K 22K 4K7 50K 100R 10K 47k 680R 680R 680R 22K 10R 22K 4K7 50K 1K 47K 0R 10K 680R 10K 6K8 10K 1K 6K8 4K7 1K 1K 10R 0R 22K 68K 68K 50K 50K 10R 1K 10K 1M 100R 10R 10R 22K 4.
R7 R8 R9 S1 4K7 50K 47k Resistor, metalfilm .5W Potentiometer linear Resistor, metalfilm .
WORK INSTRUCTION Testing of IC 30 1. Perform physical inspection ( Visual Inspection stage ) 1.1 Check : • All screws for tightness ( esp. H/S & IC fixing). • Capacitors for polarity. • Earth connection for good contact (XLR gnd to AC earth), including earthing of RCA’s, • All wiring points for good contacts (Soldering and Crimping) 2. Set up amplifier for test (Pre (PCB testing) ). 2.1 Connect amplifier to : • Variac (0 Vac) • Signal generator (Mic 1, no signal), • Resistive load (4ohm on 4ohm output). 2.
5. Function Checks (Final stage). 5.1 Move signal generator to Mic2. Turn up volume control. Watch for irregularities. Check for 10.5V out. 5.2 Move signal generator to Mic3. Turn up volume control. Watch for irregularities. Check for 10.5V out. 6. Line level inputs (Final stage). 6.1 Connect signal generator to Line1 input. Check input sensitivity – LINE (85mV + 20mV) in 10.5V out. 6.2 Move signal generator to Line2 input. Check 10.5V out. 6.3 Move signal generator to Line3 input. Check 10.5V out. 6.
WORK INSTRUCTION Testing of IC 30 1. Perform physical inspection ( Visual Inspection stage ) 1.1 Check : • All screws for tightness ( esp. H/S & IC fixing). • Capacitors for polarity. • Earth connection for good contact (XLR gnd to AC earth), including earthing of RCA’s, • All wiring points for good contacts (Soldering and Crimping) 2. Set up amplifier for test (Pre (PCB testing) ). 2.1 Connect amplifier to : • Variac (0 Vac) • Signal generator (Mic 1, no signal), • Resistive load (4ohm on 4ohm output). 2.
5. Function Checks (Final stage). 5.1 Move signal generator to Mic2. Turn up volume control. Watch for irregularities. Check for 10.5V out. 5.2 Move signal generator to Mic3. Turn up volume control. Watch for irregularities. Check for 10.5V out. 6. Line level inputs (Final stage). 6.1 Connect signal generator to Line1 input. Check input sensitivity – LINE (85mV + 20mV) in 10.5V out. 6.2 Move signal generator to Line2 input. Check 10.5V out. 6.3 Move signal generator to Line3 input. Check 10.5V out. 6.
