LEM PROCON 400, PROCON 950, PROCON 750, PROCON 1100, PROCON 1250 Service Manual

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Page 1

Index

PROCON 400 Test Procedure2 PROCON 750 Test Procedure2 PROCON 950 Test Procedure

PROCON 1100 Test Procedure

PROCON 1250 Test Procedure

4 4 PROCON 1500 Test Procedure 5

PROCON 400 Schematic PROCON 750 Schematic

PROCON 950 Schematic

7 8

PROCON 1100 Schematic PROCON 1250 Schematic

PROCON 1500 Schematic

10 11

Spare Part List

SERVICE MANUAL

Notice

Service must be carried out by qualified personnel only. Any tampering carried out by unqualified personnel during the guarantee period

✔

will forfeit the right to guarantee. For a correct operation of the instrument, after having switched off, be careful to wait at least 3 seconds before switching on again.

✔

To improve the device's specifications, the schematic diagrams may be subject to change without prior notice.

✔

All components marked by this symbol have special safety characteristics, when replacing any of these components use only manufacturer's specified parts. The (µ) micro symbol of capacitance value is substituted by U.

✔

Ω) omega symbol of resistance value is substituted by E.

The (

✔

The electrolytic capacitors are 25Vdc rated voltage unless otherwise specified.

✔

All resistors are 1/8W unless otherwise specified.

✔

All switches shown in the "OFF" position. All DC voltages measured to ground with a voltmeter 20KOhm/V.

✔ ✔ ✔ ✔ ✔

Soldering point. Male connector.

Female connector.

M/F faston connector.

ATTENTION Observe precautions when handling electrostatic sensitive devices.

Supply voltage. Logic supply ground. Test point.

Flag joined with one or more flags with the same signal name inscribed.

Analog supply ground.

Chassis ground. Earth ground.

code 270266

GENERALMUSIC S.p.A. Sales Division: 47842 S.Giovanni in Marignano (RN) ITALY - Via delle Rose, 12

✒

Phone +39(0)541/959511 - Fax +39(0)541/957404 - Internet: www.generalmusic.com

☎

Page 2

PROCON400 - Test procedures andPROCON400 - Test procedures and

PROCON400 - Test procedures and

PROCON400 - Test procedures andPROCON400 - Test procedures and adjustmentsadjustments

adjustments

adjustmentsadjustments

PRECAUTIONPRECAUTION

PRECAUTION

PRECAUTIONPRECAUTION

• To prevent short circuit during any test, the oscilloscope must be EARTH INSULATED, this occurs because some test require to connect its probe to the amplifier output, non-compliance may cause damages to oscilloscope inputs circuitry.

• Before removing or installing any modules and connectors, disconnect the amplifier from AC MAINS and measure the DC supply voltages across each of the power supply capacitors. If your measurement on any of the caps is greater than 10Vdc, connect a 100E 30W resistor across the applicable caps to discharge them for your safety. Remember to remove the discharge resistor immediately after discharging caps. Do not power up the amplifier with the discharge resistor connected.

• Do not check the amplifier with the speakers connected use the appropriate load resistors only.

• BE CAREFUL increasing the Variac you must not exceed the nominal mains voltage plus its tolerance (see specifications) any upper voltage can be cause of damage.

VISUAL CHECKVISUAL CHECK

VISUAL CHECK

VISUAL CHECKVISUAL CHECK

• Use compressed air to clear dust in the amplifier chassis.

• Before proceed to supply the amplifier check visually the internal assembly, if appears an evident damage find the most possible reasons that cause it.

• Check the wiring cables for possible interruptions or shorts.

• If the damage has burnt a printed circuit board don’t try to repair it, replace with a new one.

TESTING GEARTESTING GEAR

TESTING GEAR

TESTING GEARTESTING GEAR

• Audio Generator

• Dual Trace Oscilloscope

• Digital Multimeter

• 4E 300W, 8E 200W, 100E 30W resistors

• Variac

SETUPSETUP

SETUP

SETUPSETUP

• Connect the Variac between the Mains and the amplifier and set it at zero voltage.

• Turn full counter-clockwise the LEVEL potentiometers.

• Connect the audio generator to the channel inputs and set it to 1KHz 775mVrms (0dBm) sinusoidal signal.

• Connect the two scope traces to the amplifier outputs, before the relay, and set them in DC at 20V/div. 2mS/div.

SUPPLY CHECKSUPPLY CHECK

SUPPLY CHECK

SUPPLY CHECKSUPPLY CHECK

• Verify with the Multimeter the insulation between the heatsinks and all transistor collectors mounted on them; placing the multimeter tips between the screw heads and the collector pins you can exclude an erroneus reading due to the insulation of the heatsink anodization.

• Verify with the Multimeter the NTC (RT1 or RT2) and R122 or R222 paralleled resistor value, it must be about 1.17K (at 25°c).

• Turn on the Amplifier.

• Remove the transformer secondary fuses, set the Variac to the nominal mains voltage, check with the Multimeter the AC supply voltages:

F1-F2 = 28±2Vac. F3-F4 = 85±8Vac.

• Re-set the Variac at zero voltage, turn off the amplifier and put the fuses back on its holders.

• Set up the Variac slowly monitoring the oscilloscope screen, it should display no signal; if you notice a DC voltage or a protection trips check the amplifier as suggested in the ADVICES section.

• As soon as the +12VF supply circuit reaches its nominal value, all cooling fans run at their minimum and the speaker output relay (J401) switches.

• When the Variac ac voltage reaches the nominal voltage verify the DC supplies as follow:

+VCC = +57±5Vdc

-VCC = -57±5Vdc U101 pin 8 = +15±1Vdc U101 pin 4 = -15±1Vdc U401 pin 3 = +12±1Vdc

• If one or more voltages don’t correspond, check the rectifiers,

capacitors and transformers disconnecting them from circuitry.

CHANNEL CHECKCHANNEL CHECK

CHANNEL CHECK

CHANNEL CHECKCHANNEL CHECK

• Be sure you have disconnected the load resistor.

• Increasing the input signal also the output signal raise accordingly, it must be symmetrical without visible distortion or oscillation as shown in figure (note: the figure is representative don`t refer to the levels displayed). If there is a distortion read the section ADVICES.

• When the input signal exceeds -18dBm (~8Vpp on output) the SIGNAL led lights and the fan turns at its maximum speed.

• Firstly you must check the channel without load, afterwards you must repeat the check with the loads attached, the following table reports the approx. maximum level obtainable with this amplifier:

out level in level no load 110Vpp +4.5dB 1CH 8E 104Vpp +4dB 1CH 4E 92Vpp +3dB 2CH 8E 90Vpp +3dB 2CH 4E 80Vpp +2dB

CLIP LED ADJUSTMENTCLIP LED ADJUSTMENT

CLIP LED ADJUSTMENT

CLIP LED ADJUSTMENTCLIP LED ADJUSTMENT

• Check if the clip led lights at approx. 0dBm on input level, if necessary adjust the trimmer W301 and W302 on display board.

OFFSET ADJUSTMENTOFFSET ADJUSTMENT

OFFSET ADJUSTMENT

OFFSET ADJUSTMENTOFFSET ADJUSTMENT

• Set the input level at minimum (no signal), the output dc offset voltage must be within ±20mV, if necessary adjust the W201 (CH1) or W201 (CH2) trimmers to be within this threshold.

BIAS ADJUSTMENTBIAS ADJUSTMENT

BIAS ADJUSTMENT

BIAS ADJUSTMENTBIAS ADJUSTMENT

• No bias adjustment is necessary for this amplifier circuitry.

ADVICESADVICES

ADVICES

ADVICESADVICES

• If you have determinate that the problem is a short on a rail, you must check the output transistors.

• To determine which transistor devices are bad, use a soldering iron to lift one leg of each emitter pin and measure the emittercollector resistance on each device. Unsolder and lift one leg of each base pin and check the base-collector resistance of each transistor and replace any that measure as a short.

• If all the transistors are OK, unsolder and lift one leg of each diode and check them.

• Check the circuit board for open foil traces.

• Use the Multimeter as Ohm-meter to check the resistors, particularly the base and emitter resistors of damaged transistor.

• If the input sinewave appears to be distorted during the negative cycle, you can assume that the problem is located somewhere in the circuitry of the positive rail.

• If the positive cycle appears distorted, you can assume that the problem is in the circuitry of the negative rail.

• The dc voltages printed on the schematics are measured with the amplifier in steady state without input signal and nominal mains voltage supply, it can be useful to localize a damage.

FIGURESFIGURES

FIGURES

FIGURESFIGURES

PROCON750 - Test procedures andPROCON750 - Test procedures and

PROCON750 - Test procedures and

PROCON750 - Test procedures andPROCON750 - Test procedures and adjustmentsadjustments

adjustments

adjustmentsadjustments

PRECAUTIONPRECAUTION

PRECAUTION

PRECAUTIONPRECAUTION

• Before removing or installing any modules and connectors, disconnect the amplifier from AC MAINS and measure the DC supply voltages across each of the power supply capacitors. If your measurement on any of the caps is greater than 10Vdc, connect a 100E 60W resistor across the applicable caps to discharge them for your safety. Remember to remove the discharge resistor immediately after discharging caps. Do not power up the amplifier with the discharge resistor connected.

• Do not check the amplifier with the speakers connected use the appropriate load resistors only.

• BE CAREFUL increasing the Variac you must not exceed the nominal mains voltage plus its tolerance (see specifications) any upper voltage can be cause of damage.

VISUAL CHECKVISUAL CHECK

VISUAL CHECK

VISUAL CHECKVISUAL CHECK

• Use compressed air to clear dust in the amplifier chassis.

• Before proceed to supply the amplifier check visually the internal assembly, if appears an evident damage find the most possible reasons that cause it.

• Check the wiring cables for possible interruptions or shorts.

• If the damage has burnt a printed circuit board don’t try to repair it, replace with a new one.

TESTING GEARTESTING GEAR

TESTING GEAR

TESTING GEARTESTING GEAR

• Audio Generator

• Dual Trace Oscilloscope

• Digital Multimeter

• 4E 500W, 8E 300W, 100E 60W resistors

• Variac

SETUPSETUP

SETUP

SETUPSETUP

• Connect the Variac between the Mains and the amplifier and set it at zero voltage.

• Turn full counter-clockwise the LEVEL potentiometers.

• Connect the audio generator to the channel inputs and set it to 1KHz 775mVrms (0dB) sinusoidal signal.

• Connect the two scope traces to the amplifier outputs, before the relay, and set them in DC at 20V/div. 2mS/div.

SUPPLY CHECKSUPPLY CHECK

SUPPLY CHECK

SUPPLY CHECKSUPPLY CHECK

• Verify with the Multimeter the NTC (RT1 or RT2) and R122 or R222 paralleled resistor value, it must be about 1.17K (at 25°c).

• Turn on the Amplifier.

• Remove the transformer secondary fuses, set the Variac to the nominal mains voltage, check with the Multimeter the AC supply voltages:

F1-F2 = 28±2Vac. F3-F4 = 104±10Vac.

• Re-set the Variac at zero voltage, turn off the amplifier and put the fuses back on its holders.

• Set up the Variac slowly monitoring the oscilloscope screen, it should display no signal; if you notice a DC voltage or a protection trips check the amplifier as suggested in the ADVICES section.

• As soon as the +12VF supply circuit reaches its nominal value, all cooling fans run at their minimum and the speaker output relay (J401) switches.

• When the Variac ac voltage reaches the nominal voltage verify the DC supplies as follow:

+VCC = +75±5Vdc

-VCC = -75±5Vdc U101 pin 8 = +15±1Vdc U101 pin 4 = -15±1Vdc U401 pin 3 = +12±1Vdc

• If one or more voltages don’t correspond, check the rectifiers,

capacitors and transformers disconnecting them from circuitry.

CHANNEL CHECKCHANNEL CHECK

CHANNEL CHECK

CHANNEL CHECKCHANNEL CHECK

• Be sure you have disconnected the load resistor.

• When the input signal exceeds -18dBm (~8Vpp on output) the SIGNAL led lights and the fan turns at its maximum speed.

out level in level no load 148Vpp +7dBm 1CH 8E 128Vpp +5.5dBm 1CH 4E 120Vpp +4.5dBm 2CH 8E 120Vpp +5dBm 2CH 4E 104Vpp +4dBm

CLIP LED ADJUSTMENTCLIP LED ADJUSTMENT

CLIP LED ADJUSTMENT

CLIP LED ADJUSTMENTCLIP LED ADJUSTMENT

• Check if the clip led lights at approx. 0dBm on input level, if necessary adjust the trimmer W301 and W302 on display board.

OFFSET ADJUSTMENTOFFSET ADJUSTMENT

OFFSET ADJUSTMENT

OFFSET ADJUSTMENTOFFSET ADJUSTMENT

• Set the input level at minimum (no signal), the output dc offset voltage must be within ±20mV, if necessary adjust the W201 (CH1) or W201 (CH2) trimmers to be within this threshold.

BIAS ADJUSTMENTBIAS ADJUSTMENT

BIAS ADJUSTMENT

BIAS ADJUSTMENTBIAS ADJUSTMENT

• No bias adjustment is necessary for this amplifier circuitry.

ADVICESADVICES

ADVICES

ADVICESADVICES

• If you have determinate that the problem is a short on a rail, you must check the output transistors.

• If all the transistors are OK, unsolder and lift one leg of each diode and check them.

• Check the circuit board for open foil traces.

• Use the Multimeter as Ohm-meter to check the resistors, particularly the base and emitter resistors of damaged transistor.

• If the input sinewave appears to be distorted during the negative cycle, you can assume that the problem is located somewhere in the circuitry of the positive rail.

• If the positive cycle appears distorted, you can assume that the problem is in the circuitry of the negative rail.

• The dc voltages printed on the schematics are measured with the amplifier in steady state without input signal and nominal mains voltage supply, it can be useful to localize a damage.

FIGURESFIGURES

FIGURES

FIGURESFIGURES

Page 3

PROCON950 - Test procedures andPROCON950 - Test procedures and

PROCON950 - Test procedures and

PROCON950 - Test procedures andPROCON950 - Test procedures and adjustmentsadjustments

adjustments

adjustmentsadjustments

PRECAUTIONPRECAUTION

PRECAUTION

PRECAUTIONPRECAUTION

• Before removing or installing any modules and connectors, disconnect the amplifier from AC MAINS and measure the DC supply voltages across each of the power supply capacitors. If your measurement on any of the caps is greater than 10Vdc, connect a 100E 70W resistor across the applicable caps to discharge them for your safety. Remember to remove the discharge resistor immediately after discharging caps. Do not power up the amplifier with the discharge resistor connected.

• Do not check the amplifier with the speakers connected use the appropriate load resistors only.

• BE CAREFUL increasing the Variac you must not exceed the nominal mains voltage plus its tolerance (see specifications) any upper voltage can be cause of damage.

VISUAL CHECKVISUAL CHECK

VISUAL CHECK

VISUAL CHECKVISUAL CHECK

• Use compressed air to clear dust in the amplifier chassis.

• Before proceed to supply the amplifier check visually the internal assembly, if appears an evident damage find the most possible reasons that cause it.

• Check the wiring cables for possible interruptions or shorts.

• If the damage has burnt a printed circuit board don’t try to repair it, replace with a new one.

TESTING GEARTESTING GEAR

TESTING GEAR

TESTING GEARTESTING GEAR

• Audio Generator

• Dual Trace Oscilloscope

• Digital Multimeter

• 4E 600W, 8E 400W, 100E 70W resistors

• Variac

• Digital Thermometer (not indispensable)

SETUPSETUP

SETUP

SETUPSETUP

• Connect the Variac between the Mains and the amplifier and set it at zero voltage.

• Turn full counter-clockwise the LEVEL potentiometers.

• Connect the audio generator to the channel inputs and set it to 1KHz 775mVrms (0dBm) sinusoidal signal.

• Connect the two scope traces to the amplifier outputs, before the relay, and set them in DC at 20V/div. 2mS/div.

SUPPLY CHECKSUPPLY CHECK

SUPPLY CHECK

SUPPLY CHECKSUPPLY CHECK

• Verify with the Multimeter the NTC (RT1) and R1 paralleled resistor value, it must be about 7KE (at 25°c).

• Turn on the Amplifier.

• Remove the transformer secondary fuses, set the Variac to the nominal mains voltage, check with the Multimeter the AC supply voltages:

F1-F2 = 28±2Vac. F3-F4 = 119±12Vac.

• Re-set the Variac at zero voltage, turn off the amplifier and put the fuses back on its holders.

• Set up the Variac slowly monitoring the oscilloscope screen, it should display no signal; if you notice a DC voltage or a protection trips check the amplifier as suggested in the ADVICES.

• As soon as the +12VF supply circuit reaches its nominal value, all cooling fans run at their minimum and the speaker output relais (J201-202) switch.

• When the Variac ac voltage reaches the nominal voltage verify the DC supplies as follow:

+VCC = +81±6Vdc

-VCC = -81±6Vdc U201 pin 8 = +12±0.5Vdc U201 pin 4 = -12±0.5Vdc U202 pin 3 = +12±0.5Vdc

• If one or more voltages don’t correspond, check the rectifiers,

capacitors and transformers disconnecting them from circuitry.

CHANNEL CHECKCHANNEL CHECK

CHANNEL CHECK

CHANNEL CHECKCHANNEL CHECK

• Be sure you have disconnected the load resistor.

• When the input signal exceeds -25dBm (9Vpp on output) the SIGNAL led lights and the fans turn at their maximum speed.

• Firstly you must check the channel without load, afterwards you must repeat the check with the loads attached, the following table reports the approx. maximum level obtainable with this amp:

out level in level no load 160Vpp +0dBm 1CH 8E 158Vpp -0.7dBm 1CH 4E 128Vpp -1.5dBm 2CH 8E 130Vpp -1.3dBm 2CH 4E 116Vpp -2.5dBm

CLIP LED ADJUSTMENTCLIP LED ADJUSTMENT

CLIP LED ADJUSTMENT

CLIP LED ADJUSTMENTCLIP LED ADJUSTMENT

• Check if the clip led lights at -6/-5dBm on input (~80Vpp on output), if necessary adjust the trimmers W301/2 on display board.

OFFSET ADJUSTMENTOFFSET ADJUSTMENT

OFFSET ADJUSTMENT

OFFSET ADJUSTMENTOFFSET ADJUSTMENT

• Set the input level at minimum (no signal), the output dc offset voltage must be within ±20mV, if necessary adjust the VR101 trimmer (for each channel) to be within this threshold.

BIAS ADJUSTMENTBIAS ADJUSTMENT

BIAS ADJUSTMENT

BIAS ADJUSTMENTBIAS ADJUSTMENT

• No bias adjustment is necessary for this amplifier circuitry; in any case the amplifier has the possibility to adjust it if necessary. To check properly the bias proceed as follows:

• Using a sinusoidal signal (1KHz or more) and the 4E load attached, wait till the heatsink temperature reaches about 60°c.

• Turn down the signal at the smallest intensity you can read on your oscilloscope trace connected at the amplifier output.

• Zoom in the crossing region using the amplitude, timebase and trigger controls of your oscilloscope. If you see a distortion, try to eliminate it adjusting the VR102 trimmer.

• Finally, set the input level at minimum and verify with the multimeter attached across an emitter resistance (p.e. R132) that the dc voltage doesn`t exceed 10mV.

ADVICESADVICES

ADVICES

ADVICESADVICES

• If you have determinate that the problem is a short on a rail, you must check the output transistors.

• To determine which transistor devices are bad, use a soldering iron to lift one leg of each emitter pin and measure the resistance across emitter and collector of each device. Unsolder and lift one leg of each base pin and check the base-collector resistance. Replace any device that measure as a short.

• If all the transistors are OK, unsolder and lift one leg of each diode and check them.

• Check the circuit board for open foil traces.

• Use the Multimeter to check the resistors, particularly the base and emitter resistors of damaged transistor.

• If the input sinewave appears to be distorted during the negative cycle, you can assume that the problem is located somewhere in the circuitry of the positive rail.

• If the positive cycle appears distorted, you can assume that the problem is in the circuitry of the negative rail.

• The dc voltages printed on the schematics are measured with the amplifier in steady state without input signal and nominal mains voltage supply, it can be useful to localize a damage.

PROCON1100 - Test procedures andPROCON1100 - Test procedures and

PROCON1100 - Test procedures and

PROCON1100 - Test procedures andPROCON1100 - Test procedures and adjustmentsadjustments

adjustments

adjustmentsadjustments

PRECAUTIONPRECAUTION

PRECAUTION

PRECAUTIONPRECAUTION

• Before removing or installing any modules and connectors, disconnect the amplifier from AC MAINS and measure the DC supply voltages across each of the power supply capacitors. If your measurement on any of the caps is greater than 10Vdc, connect a 100E 80W resistor across the applicable caps to discharge them for your safety. Remember to remove the discharge resistor immediately after discharging caps. Do not power up the amplifier with the discharge resistor connected.

• Do not check the amplifier with the speakers connected use the appropriate load resistors only.

• BE CAREFUL increasing the Variac you must not exceed the nominal mains voltage plus its tolerance (see specifications) any upper voltage can be cause of damage.

VISUAL CHECKVISUAL CHECK

VISUAL CHECK

VISUAL CHECKVISUAL CHECK

• Use compressed air to clear dust in the amplifier chassis.

• Before proceed to supply the amplifier check visually the internal assembly, if appears an evident damage find the most possible reasons that cause it.

• Check the wiring cables for possible interruptions or shorts.

• If the damage has burnt a printed circuit board don’t try to repair it, replace with a new one.

TESTING GEARTESTING GEAR

TESTING GEAR

TESTING GEARTESTING GEAR

• Audio Generator

• Dual Trace Oscilloscope

• Digital Multimeter

• 4E 650W, 8E 400W, 100E 80W resistors

• Variac

• Digital Thermometer (not indispensable)

SETUPSETUP

SETUP

SETUPSETUP

• Connect the Variac between the Mains and the amplifier and set it at zero voltage.

• Turn full counter-clockwise the LEVEL potentiometers.

• Connect the audio generator to the channel inputs and set it to 1KHz 775mVrms (0dBm) sinusoidal signal.

• Connect the two scope traces to the amplifier outputs, before the relay, and set them in DC at 20V/div. 2mS/div.

SUPPLY CHECKSUPPLY CHECK

SUPPLY CHECK

SUPPLY CHECKSUPPLY CHECK

• Verify with the Multimeter the NTC (RT1) and R1 paralleled resistor value, it must be about 7KE (at 25°c).

• Turn on the Amplifier.

• Remove the transformer secondary fuses, set the Variac to the nominal mains voltage, check with the Multimeter the AC supply voltages:

F1-F2 = 28±2Vac. F3-F4 = 127±12Vac.

• Re-set the Variac at zero voltage, turn off the amplifier and put the fuses back on its holders.

• Set up the Variac slowly monitoring the oscilloscope screen, it should display no signal; if you notice a DC voltage or a protection trips check the amplifier as suggested in the ADVICES.

• As soon as the +12VF supply circuit reaches its nominal value, all cooling fans run at their minimum and the speaker output relais (J201-202) switch.

• When the Variac ac voltage reaches the nominal voltage verify the DC supplies as follow:

+VCC = +88±6Vdc

-VCC = -88±6Vdc U201 pin 8 = +12±0.5Vdc U201 pin 4 = -12±0.5Vdc U202 pin 3 = +12±0.5Vdc

• If one or more voltages don’t correspond, check the rectifiers,

capacitors and transformers disconnecting them from circuitry.

CHANNEL CHECKCHANNEL CHECK

CHANNEL CHECK

CHANNEL CHECKCHANNEL CHECK

• Be sure you have disconnected the load resistor.

• When the input signal exceeds -24dBm (9Vpp on output) the SIGNAL led lights and the fans turn at their maximum speed.

• Firstly you must check the channel without load, afterwards you must repeat the check with the loads attached, the following table reports the approx. maximum level obtainable with this amp:

out level in level no load 175Vpp +1.6dBm 1CH 8E 150Vpp +0.5dBm 1CH 4E 140Vpp -0.2dBm 2CH 8E 142Vpp +0dBm 2CH 4E 124Vpp -1.2dBm

CLIP LED ADJUSTMENTCLIP LED ADJUSTMENT

CLIP LED ADJUSTMENT

CLIP LED ADJUSTMENTCLIP LED ADJUSTMENT

• Check if the clip led lights at -6/-5dBm on input (~82Vpp on output), if necessary adjust the trimmers W301/2 on display board.

OFFSET ADJUSTMENTOFFSET ADJUSTMENT

OFFSET ADJUSTMENT

OFFSET ADJUSTMENTOFFSET ADJUSTMENT

• Set the input level at minimum (no signal), the output dc offset voltage must be within ±20mV, if necessary adjust the VR101 trimmer (for each channel) to be within this threshold.

BIAS ADJUSTMENTBIAS ADJUSTMENT

BIAS ADJUSTMENT

BIAS ADJUSTMENTBIAS ADJUSTMENT

• No bias adjustment is necessary for this amplifier circuitry; in any case the amplifier has the possibility to adjust it if necessary. To check properly the bias proceed as follows:

• Using a sinusoidal signal (1KHz or more) and the 4E load attached, wait till the heatsink temperature reaches about 60°c.

• Turn down the signal at the smallest intensity you can read on your oscilloscope trace connected at the amplifier output.

• Zoom in the crossing region using the amplitude, timebase and trigger controls of your oscilloscope. If you see a distortion, try to eliminate it adjusting the VR102 trimmer.

• Finally, set the input level at minimum and verify with the multimeter attached across an emitter resistance (p.e. R132) that the dc voltage doesn`t exceed 10mV.

ADVICESADVICES

ADVICES

ADVICESADVICES

• If you have determinate that the problem is a short on a rail, you must check the output transistors.

• If all the transistors are OK, unsolder and lift one leg of each diode and check them.

• Check the circuit board for open foil traces.

• Use the Multimeter to check the resistors, particularly the base and emitter resistors of damaged transistor.

• If the input sinewave appears to be distorted during the negative cycle, you can assume that the problem is located somewhere in the circuitry of the positive rail.

• If the positive cycle appears distorted, you can assume that the problem is in the circuitry of the negative rail.

• The dc voltages printed on the schematics are measured with the amplifier in steady state without input signal and nominal mains voltage supply, it can be useful to localize a damage.

Page 4

PROCON1250 - Test procedures andPROCON1250 - Test procedures and

PROCON1250 - Test procedures and

PROCON1250 - Test procedures andPROCON1250 - Test procedures and adjustmentsadjustments

adjustments

adjustmentsadjustments

PRECAUTIONPRECAUTION

PRECAUTION

PRECAUTIONPRECAUTION

• Before removing or installing any modules and connectors, disconnect the amplifier from AC MAINS and measure the DC supply voltages across each of the power supply capacitors. If your measurement on any of the caps is greater than 10Vdc, connect a 100E 90W resistor across the applicable caps to discharge them for your safety. Remember to remove the discharge resistor immediately after discharging caps. Do not power up the amplifier with the discharge resistor connected.

• Do not check the amplifier with the speakers connected use the appropriate load resistors only.

• BE CAREFUL increasing the Variac you must not exceed the nominal mains voltage plus its tolerance (see specifications) any upper voltage can be cause of damage.

VISUAL CHECKVISUAL CHECK

VISUAL CHECK

VISUAL CHECKVISUAL CHECK

• Use compressed air to clear dust in the amplifier chassis.

• Before proceed to supply the amplifier check visually the internal assembly, if appears an evident damage find the most possible reasons that cause it.

• Check the wiring cables for possible interruptions or shorts.

• If the damage has burnt a printed circuit board don’t try to repair it, replace with a new one.

TESTING GEARTESTING GEAR

TESTING GEAR

TESTING GEARTESTING GEAR

• Audio Generator

• Dual Trace Oscilloscope

• Digital Multimeter

• 4E 700W, 8E 450W, 100E 90W resistors

• Variac

• Digital Thermometer (not indispensable)

SETUPSETUP

SETUP

SETUPSETUP

• Connect the Variac between the Mains and the amplifier and set it at zero voltage.

• Turn full counter-clockwise the LEVEL potentiometers.

• Connect the audio generator to the channel inputs and set it to 1KHz 775mVrms (0dBm) sinusoidal signal.

• Connect the two scope traces to the amplifier outputs, before the relay, and set them in DC at 20V/div. 2mS/div.

SUPPLY CHECKSUPPLY CHECK

SUPPLY CHECK

SUPPLY CHECKSUPPLY CHECK

• Verify with the Multimeter the NTC (RT1) and R1 paralleled resistor value, it must be about 7KE (at 25°c).

• Turn on the Amplifier.

• Remove the transformer secondary fuses, set the Variac to the nominal mains voltage, check with the Multimeter the AC supply voltages:

F1-F2 = 28±2Vac. F3-gnd and F4-gnd = 69±7Vac.

• Re-set the Variac at zero voltage, turn off the amplifier and put the fuses back on its holders.

• Set up the Variac slowly monitoring the oscilloscope screen, it should display no signal; if you notice a DC voltage or a protection trips check the amplifier as suggested in the ADVICES.

• As soon as the +12VF supply circuit reaches its nominal value, all cooling fans run at their minimum and the speaker output relais (J201-202) switch.

• When the Variac ac voltage reaches the nominal voltage verify the DC supplies as follow:

+VCC = +93±7Vdc

-VCC = -93±7Vdc U201 pin 8 = +12±0.5Vdc U201 pin 4 = -12±0.5Vdc U202 pin 3 = +12±0.5Vdc

• If one or more voltages don’t correspond, check the rectifiers,

capacitors and transformers disconnecting them from circuitry.

CHANNEL CHECKCHANNEL CHECK

CHANNEL CHECK

CHANNEL CHECKCHANNEL CHECK

• Be sure you have disconnected the load resistor.

• When the input signal exceeds -23dBm (10Vpp on output) the SIGNAL led lights and the fans turn at their maximum speed.

• Firstly you must check the channel without load, afterwards you must repeat the check with the loads attached, the following table reports the approx. maximum level obtainable with this amp:

out level in level no load 180Vpp +2.0dBm 1CH 8E 160Vpp +1.0dBm 1CH 4E 144Vpp +0.3dBm 2CH 8E 148Vpp +0.6dBm 2CH 4E 130Vpp -0.5dBm

CLIP LED ADJUSTMENTCLIP LED ADJUSTMENT

CLIP LED ADJUSTMENT

CLIP LED ADJUSTMENTCLIP LED ADJUSTMENT

• Check if the clip led lights at -6/-5dBm on input (~84Vpp on output), if necessary adjust the trimmers W301/2 on display board.

OFFSET ADJUSTMENTOFFSET ADJUSTMENT

OFFSET ADJUSTMENT

OFFSET ADJUSTMENTOFFSET ADJUSTMENT

• Set the input level at minimum (no signal), the output dc offset voltage must be within ±20mV, if necessary adjust the VR101 trimmer (for each channel) to be within this threshold.

BIAS ADJUSTMENTBIAS ADJUSTMENT

BIAS ADJUSTMENT

BIAS ADJUSTMENTBIAS ADJUSTMENT

• No bias adjustment is necessary for this amplifier circuitry; in any case the amplifier has the possibility to adjust it if necessary. To check properly the bias proceed as follows:

• Using a sinusoidal signal (1KHz or more) and the 4E load attached, wait till the heatsink temperature reaches about 60°c.

• Turn down the signal at the smallest intensity you can read on your oscilloscope trace connected at the amplifier output.

• Zoom in the crossing region using the amplitude, timebase and trigger controls of your oscilloscope. If you see a distortion, try to eliminate it adjusting the VR102 trimmer.

• Finally, set the input level at minimum and verify with the multimeter attached across an emitter resistance (p.e. R132) that the dc voltage doesn`t exceed 10mV.

ADVICESADVICES

ADVICES

ADVICESADVICES

• If you have determinate that the problem is a short on a rail, you must check the output transistors.

• If all the transistors are OK, unsolder and lift one leg of each diode and check them.

• Check the circuit board for open foil traces.

• Use the Multimeter to check the resistors, particularly the base and emitter resistors of damaged transistor.

• If the input sinewave appears to be distorted during the negative cycle, you can assume that the problem is located somewhere in the circuitry of the positive rail.

• If the positive cycle appears distorted, you can assume that the problem is in the circuitry of the negative rail.

• The dc voltages printed on the schematics are measured with the amplifier in steady state without input signal and nominal mains voltage supply, it can be useful to localize a damage.

PROCON1500 - Test procedures andPROCON1500 - Test procedures and

PROCON1500 - Test procedures and

PROCON1500 - Test procedures andPROCON1500 - Test procedures and adjustmentsadjustments

adjustments

adjustmentsadjustments

PRECAUTIONPRECAUTION

PRECAUTION

PRECAUTIONPRECAUTION

• Before removing or installing any modules and connectors, disconnect the amplifier from AC MAINS and measure the DC supply voltages across each of the power supply capacitors. If your measurement on any of the caps is greater than 10Vdc, connect a 100E 100W resistor across the applicable caps to discharge them for your safety. Remember to remove the discharge resistor immediately after discharging caps. Do not power up the amplifier with the discharge resistor connected.

• Do not check the amplifier with the speakers connected use the appropriate load resistors only.

• BE CAREFUL increasing the Variac you must not exceed the nominal mains voltage plus its tolerance (see specifications) any upper voltage can be cause of damage.

VISUAL CHECKVISUAL CHECK

VISUAL CHECK

VISUAL CHECKVISUAL CHECK

• Use compressed air to clear dust in the amplifier chassis.

• Before proceed to supply the amplifier check visually the internal assembly, if appears an evident damage find the most possible reasons that cause it.

• Check the wiring cables for possible interruptions or shorts.

• If the damage has burnt a printed circuit board don’t try to repair it, replace with a new one.

TESTING GEARTESTING GEAR

TESTING GEAR

TESTING GEARTESTING GEAR

• Audio Generator

• Dual Trace Oscilloscope

• Digital Multimeter

• 4E 800W, 8E 500W, 100E 100W resistors

• Variac

• Digital Thermometer (not indispensable)

SETUPSETUP

SETUP

SETUPSETUP

• Connect the Variac between the Mains and the amplifier and set it at zero voltage.

• Turn full counter-clockwise the LEVEL potentiometers.

• Connect the audio generator to the channel inputs and set it to 1KHz 775mVrms (0dBm) sinusoidal signal.

• Connect the two scope traces to the amplifier outputs, before the relay, and set them in DC at 20V/div. 2mS/div.

SUPPLY CHECKSUPPLY CHECK

SUPPLY CHECK

SUPPLY CHECKSUPPLY CHECK

• Verify with the Multimeter the NTC (RT1) and R1 paralleled resistor value, it must be about 7KE (at 25°c).

• Turn on the Amplifier.

• Remove the transformer secondary fuses, set the Variac to the nominal mains voltage, check with the Multimeter the AC supply voltages:

F1-F2 = 28±2Vac. F3-gnd and F4-gnd = 71±8Vac.

• Re-set the Variac at zero voltage, turn off the amplifier and put the fuses back on its holders.

• Set up the Variac slowly monitoring the oscilloscope screen, it should display no signal; if you notice a DC voltage or a protection trips check the amplifier as suggested in the ADVICES.

• As soon as the +12VF supply circuit reaches its nominal value, all cooling fans run at their minimum and the speaker output relais (J201-202) switch.

• When the Variac ac voltage reaches the nominal voltage verify the DC supplies as follow:

+VCC = +100±8Vdc

-VCC = -100±8Vdc U201 pin 8 = +12±0.5Vdc U201 pin 4 = -12±0.5Vdc U202 pin 3 = +12±0.5Vdc

• If one or more voltages don’t correspond, check the rectifiers,

capacitors and transformers disconnecting them from circuitry.

CHANNEL CHECKCHANNEL CHECK

CHANNEL CHECK

CHANNEL CHECKCHANNEL CHECK

• Be sure you have disconnected the load resistor.

• When the input signal exceeds -24dBm (10Vpp on output) the SIGNAL led lights and the fans turn at their maximum speed.

• Firstly you must check the channel without load, afterwards you must repeat the check with the loads attached, the following table reports the approx. maximum level obtainable with this amp:

out level in level no load 190Vpp +1.8dBm 1CH 8E 170Vpp +0.8dBm 1CH 4E 158Vpp +0.2dBm 2CH 8E 159Vpp +0.3dBm 2CH 4E 142Vpp -0.8dBm

CLIP LED ADJUSTMENTCLIP LED ADJUSTMENT

CLIP LED ADJUSTMENT

CLIP LED ADJUSTMENTCLIP LED ADJUSTMENT

• Check if the clip led lights at -6/-5dBm on input (~88Vpp on output), if necessary adjust the trimmers W301/2 on display board.

OFFSET ADJUSTMENTOFFSET ADJUSTMENT

OFFSET ADJUSTMENT

OFFSET ADJUSTMENTOFFSET ADJUSTMENT

• Set the input level at minimum (no signal), the output dc offset voltage must be within ±20mV, if necessary adjust the VR101 trimmer (for each channel) to be within this threshold.

BIAS ADJUSTMENTBIAS ADJUSTMENT

BIAS ADJUSTMENT

BIAS ADJUSTMENTBIAS ADJUSTMENT

• No bias adjustment is necessary for this amplifier circuitry; in any case the amplifier has the possibility to adjust it if necessary. To check properly the bias proceed as follows:

• Using a sinusoidal signal (1KHz or more) and the 4E load attached, wait till the heatsink temperature reaches about 60°c.

• Turn down the signal at the smallest intensity you can read on your oscilloscope trace connected at the amplifier output.

• Zoom in the crossing region using the amplitude, timebase and trigger controls of your oscilloscope. If you see a distortion, try to eliminate it adjusting the VR102 trimmer.

• Finally, set the input level at minimum and verify with the multimeter attached across an emitter resistance (p.e. R132) that the dc voltage doesn`t exceed 10mV.

ADVICESADVICES

ADVICES

ADVICESADVICES

• If you have determinate that the problem is a short on a rail, you must check the output transistors.

• If all the transistors are OK, unsolder and lift one leg of each diode and check them.

• Check the circuit board for open foil traces.

• Use the Multimeter to check the resistors, particularly the base and emitter resistors of damaged transistor.

• If the input sinewave appears to be distorted during the negative cycle, you can assume that the problem is located somewhere in the circuitry of the positive rail.

• If the positive cycle appears distorted, you can assume that the problem is in the circuitry of the negative rail.

• The dc voltages printed on the schematics are measured with the amplifier in steady state without input signal and nominal mains voltage supply, it can be useful to localize a damage.

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1010

Page 11

Spare Part ListSpare Part List

Spare Part List

Spare Part ListSpare Part List

Legend

EU = Europe Version US = US Version code description

PROCON 400/750PROCON 400/750

PROCON 400/750

PROCON 400/750PROCON 400/750

130285 Mains Cable (EU) 110291 16A 250Vac Bipolar Power Switch 020493 100n 250Vac MKP EMI Capacitor “Siemens” HGB238001 Transformer 230Vac 550W (EU) (Procon 400) HGB238002 Transformer 230Vac 900W (EU) (Procon 750) 080608 36MB20A 35A 200V Rectifier Diode Bridge HGB030000 10000u 80V -10+50% V Electrolytic Capacitor VT 110038 T16A Fuse 6.3x32mm (EU)(US) (Procon 750) 110027 T10A Fuse 6.3x32mm (EU)(US) (Procon 400) 141200 Speakon Socket (NL4MP Neutrik) HGB347000 Volume Knob HGB140000 Dual Red/Blk Binding Post HGB110300 12Vdc 0.25A 80x25mm Fan 110360 Fan Grid 80mm

HGB768012 * I HGB768011 *

HGB140001 * 2sw 2pos H Slider Switch HGB140002 * Hor Female XLR Socket HGB140003 * Jack Horizontal S-F Socket HGB110301 * Relay 12V / 2 Switch 10A 250Vac HGB100000 * TA7317P Speaker Protection Circuit HGB090009 * 2SA965-O TO92 Pnp Transistor HGB090007 * 2SC2235-O TO92 Npn Transistor HGB090000 * 2SC2240GR TO92 LN Npn Transistor 110011 * T1A Fuse 5x20mm (EU) 100061 * TL072 Dual J-Fet Operational Amplifier 100045 * 7812 +12V 1A Voltage Regulator 090200 * 2N5550/1 TO92 Npn Transistor 080158 * 1N4004 1A 400V Rectifier Diode 080103 * 1N4148 100mA 75V Signal Diode 060521 * 2K2 2W 10% Resistor 060253 * 10E 5W 10% Wire Resistor 050691 * 470K 1/4W 5% Resistor 050651 * 220K 1/4W 5% Resistor 050571 * 47K 1/4W 5% Resistor 050561 * 39K 1/4W 5% Resistor 050541 * 27K 1/4W 5% Resistor 050531 * 22K 1/4W 5% Resistor 050511 * 15K 1/4W 5% Resistor 050491 * 10K 1/4W 5% Resistor 050471 * 6K8 1/4W 5% Resistor 050401 * 1K8 1/4W 5% Resistor 050391 * 1K5 1/4W 5% Resistor 050381 * 1K2 1/4W 5% Resistor 050371 * 1K 1/4W 5% Resistor 050301 * 270E 1/4W 5% Resistor 050291 * 220E 1/4W 5% Resistor 050231 * 68E 1/4W 5% Resistor 030721 * 1000u 25V 20% Vert Electrolytic Capacitor 030650 * 470u 25V 20% Vert Electrolytic Capacitor 030565 * 220u 25V 20% Vert Electrolytic Capacitor 030485 * 100u 25V 20% Vert Electrolytic Capacitor 030403 * 47u 25V 20% Vert Electrolytic Capacitor 030324 * 22u 50V 20% Vert Electrolytic Capacitor 030245 * 10u 50V 20% Vert Electrolytic Capacitor 021024 * 100n 63V 10% MKT Polyester Capacitor 010595 * 100n 50V -20+80% Ceramic Cap. Multilayer 010443 * 680p 50V 10% CL2 Ceramic Capacitor 010335 * 100p 500V 10% CL2 Ceramic Capacitor 010200 * 6p8 50V 10% CL2 Ceramic Capacitor

HGB768001 Volume Board (PCBA HQ7.7.179)

HGB075000 * 50KA RK16 Hor Rotary Potentiometer K15 40CLK

HGB768002 Display Board (PCBA HQ7.7301)

Assembly

Input, Protection & Supply BoardInput, Protection & Supply Board

Input, Protection & Supply Board

Input, Protection & Supply BoardInput, Protection & Supply Board

nput, Protection & Supply Board (PCBA HQ7.7332)(Procon750)

Input, Protection & Supply Board (PCBA HQ7.7302)(Procon400)

Volume BoardVolume Board

Volume Board

Volume BoardVolume Board

Display BoardDisplay Board

Display Board

Display BoardDisplay Board

050371 * 1K 1/4W 5% Resistor 042634 * 20K0 1/4W 1% Metalized Film Resistor 030245 * 10u 50V 20% Vert Electrolytic Capacitor

Amplifier ModuleAmplifier Module

Amplifier Module

Amplifier ModuleAmplifier Module

HGB768014 375+375W Amplifier Module (PCBA HQ7.7308) HGB768013 200+200W Amplifier Module (PCBA HQ7.7307)

090201 * 2N5400/1 TO92 Pnp Transistor 090200 * 2N5550/1 TO92 Npn Transistor HGB090008 * 2SC2690 TO126 Npn Transistor HGB090010 * 2SA1220 TO126 Pnp Transistor HGB090014 * 2SA1943 TO264 Pnp Transistor HGB090013 * 2SC5200 TO264 Npn Transistor HGB090006 * 2SA1941 TO3P/TO218 Pnp Transistor HGB090005 * 2SC5198 TO3P/TO218 Npn Transistor HGB090004 * 2SA970GR TO92 LN Pnp Transistor HGB090001 * 2SC2001K TO92 Npn Transistor HGB090000 * 2SC2240GR TO92 LN Npn Transistor HGB080800 * Ntc type DKF503 (Thermometrics) 080158 * 1N4004 1A 400V Rectifier Diode 080103 * 1N4148 100mA 75V Signal Diode 060253 * 10E 5W 10% Wire Resistor 060210 * 4E7 2W 10% Resistor 050611 * 100K 1/4W 5% Resistor 050491 * 10K 1/4W 5% Resistor 050461 * 5K6 1/4W 5% Resistor 050301 * 270E 1/4W 5% Resistor 050131 * 10E 1/4W 5% Resistor 050091 * 4E7 1/4W 5% Resistor 030324 * 22u 50V 20% Vert Electrolytic Capacitor 030245 * 10u 50V 20% Vert Electrolytic Capacitor 030245 * 10u 50V 20% Vert Electrolytic Capacitor 020481 * 100n 100V10% MKT Polyester Capacitor 010595 * 100n 50V -20+80% Ceramic Cap. Multilayer 010335 * 100p 500V 10% CL2 Ceramic Capacitor

PROCON 950/1100/1250/1500PROCON 950/1100/1250/1500

PROCON 950/1100/1250/1500

PROCON 950/1100/1250/1500PROCON 950/1100/1250/1500

130285 Mains Cable (EU) 110291 16A 250Vac Bipolar Power Switch 020493 100n 250Vac MKP EMI Capacitor “Siemens” HGB238003 Transformer 230Vac 1100W (EU) (Procon 950) HGB238004 Transformer 230Vac 1200W (EU) (Procon 1100) HGB238005 Transformer 230Vac 1600W (EU) (Procon 1250) HGB238006 Transformer 230Vac 1900W (EU) (Procon 1500) 080608 36MB20A 35A 200V Rectifier Diode Bridge HGB030002 10000u 110V -10+50% V Electrolytic Capacitor VT (Procon1250/1500) HGB030001 10000u 100V -10+50% V Electrolytic Capacitor VT (Procon950/1100) 110063 T25A Fuse 6.3x32mm (EU)(US) (Procon 1500) 110062 T20A Fuse 6.3x32mm (EU)(US) (Procon 1250) 110038 T16A Fuse 6.3x32mm (EU)(US) (Procon 950/1100) 141200 Speakon Socket (NL4MP Neutrik) HGB347000 Volume Knob HGB140000 Dual Red/Blk Binding Post HGB110300 12Vdc 0.25A 80x25mm Fan (Procon 950/1100) HGB110302 12Vdc 0.45A 80x25mm Fan (Procon 1250/1500) 110360 Fan Grid 80mm

768272 Soft Start Board (Pcb#313114) (NL version only)

140917 * 2 Contacts Vert Male Connector 120857 * 6.3mm Vertical Male Faston for Pcb 110324 * Relay NO 1 SC.12V 20A R=160E 090152 * BC337 TO92 Npn Transistor 080156 * 1N4002 1A 100V Rectifier Diode 080103 * 1N4148 100mA 75V Signal Diode 061341 * 68E 20W 5% Wire Resistor 052060 * 100K 1/8w 5% Resistor 052056 * 47K 1/8w 5% Resistor 052048 * 10K 1/8w 5% Resistor 030403 * 47u 25V 20% Vert Electrolytic Capacitor 020493 * 100n 250Vac MKP EMI Capacitor “Siemens” 010595 * 100n 50V -20+80% Ceramic Cap. Multilayer

HGB768000 Input, Protection & Supply Board (PCBA HQ7.7333)

HGB140001 * 2sw 2pos H Slider Switch HGB140002 * Hor Female XLR Socket HGB140003 * Jack Horizontal S-F Socket HGB110301 * Relay 12V / 2 Switch 10A 250Vac HGB100000 * TA7317P Speaker Protection Circuit HGB090008 * 2SC2690 TO126 Npn Transistor 110012 * T1.6A Fuse 5x20mm (EU) (Procon1100/1250/1500) 110011 * T1A Fuse 5x20mm (EU) (Procon950)

Assembly

Soft Start BoardSoft Start Board

Soft Start Board

Soft Start BoardSoft Start Board

Input, Protection & Supply BoardInput, Protection & Supply Board

Input, Protection & Supply Board

Input, Protection & Supply BoardInput, Protection & Supply Board

(Procon950/1100/1250/1500)

100061 * TL072 Dual J-Fet Operational Amplifier 100045 * 7812 +12V 1A Voltage Regulator 100043 * 7912 -12V 1A Voltage Regulator 090201 * 2N5400/1 TO92 Pnp Transistor 090200 * 2N5550/1 TO92 Npn Transistor 080158 * 1N4004 1A 400V Rectifier Diode 060253 * 10E 5W 10% Wire Resistor 050691 * 470K 1/4W 5% Resistor 050671 * 330K 1/4W 5% Resistor 050641 * 180K 1/4W 5% Resistor 050621 * 120K 1/4W 5% Resistor 050581 * 56K 1/4W 5% Resistor 050571 * 47K 1/4W 5% Resistor 050551 * 33K 1/4W 5% Resistor 050521 * 18K 1/4W 5% Resistor 050491 * 10K 1/4W 5% Resistor 050481 * 8K2 1/4W 5% Resistor 050451 * 4K7 1/4W 5% Resistor 050441 * 3K9 1/4W 5% Resistor 050431 * 3K3 1/4W 5% Resistor 050251 * 100E 1/4W 5% Resistor 050131 * 10E 1/4W 5% Resistor 042634 * 20K0 1/4W 1% Metalized Film Resistor 030721 * 1000u 25V 20% Vert Electrolytic Capacitor 030650 * 470u 25V 20% Vert Electrolytic Capacitor 030565 * 220u 25V 20% Vert Electrolytic Capacitor 030485 * 100u 25V 20% Vert Electrolytic Capacitor 030403 * 47u 25V 20% Vert Electrolytic Capacitor 030324 * 22u 50V 20% Vert Electrolytic Capacitor 030245 * 10u 50V 20% Vert Electrolytic Capacitor 030005 * 1u 50V 20% Vert Electrolytic Capacitor 021024 * 100n 63V 10% MKT Polyester Capacitor 021012 * 10n 63V 10% MKT Polyester Capacitor 010595 * 100n 50V -20+80% Ceramic Cap. Multilayer 010200 * 6p8 50V 10% CL2 Ceramic Capacitor

Volume BoardVolume Board

Volume Board

Volume BoardVolume Board

HGB768001 Volume Board (PCBA HQ7.7.179)

HGB075000 * 50KA RK16 Hor Rotary Potentiometer K15 40CLK

Display BoardDisplay Board

Display Board

Display BoardDisplay Board

HGB768002 Display Board (PCBA HQ7.7301)

MDL090000 * 9014C Npn TO92 Ebc 50V 0,15A 080158 * 1N4004 1A 400V Rectifier Diode 070181 * 10K 20% Horizontal Linear Trimmer 050571 * 47K 1/4W 5% Resistor 050491 * 10K 1/4W 5% Resistor 050381 * 1K2 1/4W 5% Resistor 050371 * 1K 1/4W 5% Resistor 050481 * 8K2 1/4W 5% Resistor 042634 * 20K0 1/4W 1% Metalized Film Resistor 030245 * 10u 50V 20% Vert Electrolytic Capacitor

Power Amplifier ModulePower Amplifier Module

Power Amplifier Module

Power Amplifier ModulePower Amplifier Module

HGB768010 CH1-750W Amplifier Module (PCBA HQ7.7312) HGB768009 CH2-750W Amplifier Module (PCBA HQ7.7311) HGB768008 CH1-625W Amplifier Module (PCBA HQ7.7198) HGB768007 CH2-625W Amplifier Module (PCBA HQ7.7198) HGB768006 CH1-550W Amplifier Module (PCBA HQ7.7198) HGB768005 CH2-550W Amplifier Module (PCBA HQ7.7198) HGB768004 CH1-475W Amplifier Module (PCBA HQ7.7314) HGB768003 CH2-475W Amplifier Module (PCBA HQ7.7314)

HGB090014 * 2SA1943 TO264 Pnp Transistor HGB090013 * 2SC5200 TO264 Npn Transistor HGB090006 * 2SA1941 TO3P/TO218 Pnp Transistor HGB090005 * 2SC5198 TO3P/TO218 Npn Transistor HGB090004 * 2SA970GR TO92 LN Pnp Transistor HGB090003 * 2SA940A TO220F Pnp Transistor HGB090002 * 2SC2073A TO220F Npn Transistor HGB090001 * 2SC2001K TO92 Npn Transistor HGB090000 * 2SC2240GR TO92 LN Npn Transistor HGB080800 * Ntc type DKF503 (Thermometrics) HGB080000 * FR107 OR BA159 Fast Rec Diode 1A 1000V 500ns DO41 HGB061000 * 10K 4W 10% Resistor 230557 * 1uH Horizontal Coil For Amplifier 120857 * 6.3mm Vertical Male Faston for Pcb 080103 * 1N4148 100mA 75V Signal Diode 070201 * 22K 20% Horizontal Linear Trimmer 070106 * 470E 20% Horizontal Linear Trimmer 060336 * 47E 2W 10% Resistor 060253 * 10E 5W 10% Wire Resistor 060210 * 4E7 2W 10% Resistor 060151 * 1E 5W 10% Wire Resistor 052047 * 8K2 1/8w 5% Resistor 050571 * 47K 1/4W 5% Resistor

050541 * 27K 1/4W 5% Resistor 050531 * 22K 1/4W 5% Resistor 050511 * 15K 1/4W 5% Resistor 050491 * 10K 1/4W 5% Resistor 050421 * 2K7 1/4W 5% Resistor 050371 * 1K 1/4W 5% Resistor 050351 * 680E 1/4W 5% Resistor 050301 * 270E 1/4W 5% Resistor 050291 * 220E 1/4W 5% Resistor 050271 * 150E 1/4W 5% Resistor 042634 * 20K0 1/4W 1% Metalized Film Resistor 040134 * 10E 1/2W 5% Resistor 040091 * 4E7 1/2W 5% Resistor 030410 * 47u 50V 20% Vert Electrolytic Capacitor 030403 * 47u 25V 20% Vert Electrolytic Capacitor 030245 * 10u 50V 20% Vert Electrolytic Capacitor 020481 * 100n 100V10% MKT Polyester Capacitor 010426 * 470p 50V 10% CL2 Ceramic Capacitor 010345 * 100p 50V 10% CL2 Ceramic Capacitor 010335 * 100p 500V 10% CL2 Ceramic Capacitor 010293 * 33p 50V 10% CL2 Ceramic Capacitor 010282 * 27p 50V 10% CL2 Ceramic Capacitor

Note:Note:

Note:

Note:Note:

- All dimensions are in mm unless otherwise specified.

- Each spare part is single quantity unless otherwise specified.

- Asterisk prefix explanation: Omitted = First level spare part. One asterisk = Second level, part of previous listed first level part. Two asterisk = Third level, part of previous listed second level part.

Three asterisk = ............

- Any request for not above mentioned part must encompass specific description

including:

1) Model name,

2) Section name,

3) Module code,

4) Reference name,

5) Quantity number.

1111