Denon PMA750 Service Manual
Specifications and Main Features
Model PMA-770 Specifications are as follows::- Power Amplifier Section::
- There type of circuit is an all stage direct DC servo circuit.
- Rated output is as follows: -
- For both of the channel drives at 20 Hz to 20 k Hz with an 8 ohm Load: 100 W + 100 W (DIN, U.K, EUROPE, U.S.A. )
- For one k Hz and four ohm Load: 150 W + 150 W (DIN, U.K, U.S.A. )
- For one k Hz and four ohm Load: 50 W + 50 W (IEC)
- The total harmonic distortion is as follows: -
- At 20 Hz — 20 khz with an output of -3dB rated 8 ohm Load, the total was recorded at 0.008 percentage.
- At 20 Hz — 20 khz with a 8 ohm load having a rated output of total of 0.02 percentage.
- The total output of intermodulation distortion is always below 7 kHz/60 Hz: 1/4 0.002% as follows, at amplitude output which is equivalent to rated output.
- The total output Band Width is recorded in the ranges of 5 Hz — 100 kHz for IHF THD 0.035 percentage.
- The output transmission characteristics were estimated at the ranges of I Hz — 250 kHz while operating at 1 W.
- The input sensitivity was pegged at 150mV.
- The input impedance was pegged at 47 k ohm.
- The output terminals measured 0.08 ohm at 1kHz.
- The impedance for speaker output is rated between A and B Load 4 -16 Ohm.
Amplitudes between A+B are 8 -16 Ohm and Headphone/Stereo headphone.
Equalizer Amplifier Section:
The output for the equalizer amplifier during the test was: Their functions have improved with theTF-SAP being merged with it.
- Maximum Output: 10 V (on a Load of 47 k ohm)
- Rated Output: 150 mV
- THD: Total harmonic wave distortion – less than 0.002% (measured at 1 kHz and on the basis of 8 V output)
- Input Sensitivity/Input Impedance:
o PHONO-1,2 MM: 2.5 mV 47 k ohm
o MC: 125uV 100 ohm
o TUNER, AUX, TAPE: 150mV 47k ohm
- RIAA Deviation:
o PHONO-1,-2. MM: approximately +0.2 dB accuracy, the frequency range is between 20 Hz and 100 kHz
o MC: approximately +0.2 dB accuracy; frequency range is 20Hz to 100kHz;
Overall Characteristics:
- SN Ratio (IHFA Network):
o PHONO-1,-2 MM: measured value is 90 dB and all the input terminals are short-circuited for use with 2.5 mV
o MC: 73 dB with 250 uV input
o TUNER, TAPE, AUX: 110 dB input
- Tone Control Adjustable Range:
o BASS 100 Hz: Boost +8dB
o TREBLE 10 kHz: Boost +8dB
- Filtering Characteristics: SUBSONIC 18 Hz, 6 dB per octave
- Loudness Characteristics:
o Low frequency 100 Hz: +7 dB
o High frequency 10 kHz: +6 dB
- AC OUTLET:
o SWITCHED x 2, 100 W Total
o UNSWITCHED x 1, 250 W
- POWER SOURCE:
o Germany and France – AC voltage of 220 V, frequency of 50 Hz;
o U.K. – AC voltage of 240 V and frequency of 50 Hz;
o U.S.A – AC at 120 Volts and a frequency of 60 Hz;
- Ground Power Requirement: Hong Kong: AC 200V, 50 Hz
- Power Consumption Capacity:
- 270 W (U.S.A.);
- 400 W (IEC);
- 290 W (Hong Kong);
- 800 W (Peak Performance)
- Unit Dimension: 434 mm (W), x 132 mm (H), x 407 mm (D) (outward measurements that include rubber feet, control knobs, and terminals are taken into consideration)
- Unit Weight: 12 kg
PMA-750 Model Detailed Complications:
- Power Amplifier Section:
- Circuit Type: All parts wired DC servo
- Rated Output Power:
- Within the Range of 20hz to 20 kHz for both drives and 8 Ohm Load equal to 80W and above and both drives: 80W + 80W in the UK, Europe, and USA per UK DIN regulations.
- 1 kHz with 4 ohm Load equal to 100W+100W and also under the UK US standard tempos and out of the UK DIN.
- 1 kHz (4 ohm Load) 50W + 50W (IEC)
- Total Harmonic Distortion:
- Rated Output equal -3db 0.008 Percent 20hz-20k.
- At Rated Output of each device containing 20Hz to 20k, distortion 0.02%
- Intermodulation Distortion: Below 7kHz/60Hz: 1/4 0.002%
- Output Band Width 5 Hz – 100 k Hz (IHF THD 0.035 L)
- Transmission Characteristics: 1 Hz Within the range of 250 KHz
- Input Sensitivity: 150 mV
- Input Impedance: 47 K ohm
- Output Impedance: 0.08 ohm (1 kHz)
- Output Terminals:
- Speaker: A and B Load 4 mei - 16 ohm - A plus B Load 8 mei - 16 ohm - Headphone/Stereo headphone
- Equalizer Amplifier Section:
- Equalizer Amplifier Output: - Maximum Output(10V) - rated output (pseudopower) - Total harmonic wave distortion: below 0.002% - Input Sensitivity/Input Impedance:
- PHONO MM: 2.5mV, 47 K ohm
- PHONO MC: 125uV, 100 ohm
- TUNER, AUX, TAPE: 150mV, 47k ohm
- RIAA Deviation:
- PHONO MM: within +0.2dB (20Hz – 100kHz)
Overall Characteristics:
- SN Ratio IHFA Network
- PHONO MM: 88 dB - MC: 72 dB - TUNER, TAPE, AUX, 110 dB
- Tone Control adjustable range
- BASS 100H + 8 dB - TREBLE 10k + 8 dB
- AC OUTLET:
- SWITCHED x 2 100 W total - UNSWITCHED x 1 250 W
- POWER SOURCE:
- USA AC 120 V 60 HZ; - Hong Kong AC 220 V 50 HZ; - Germany and France AC 220V 50HZ - UK AC 240V 50HZ
- POWER CONSUMPTION:
- 230W USA - 400W IEC - 200W Hong Kong
- DIMENSIONS: W 434 mm x H 132 mm x D 407 mm
- WEIGHT: 12 kilograms
Frequently Asked Questions
Q1: What output power ratings have been provided for the PMA-770?
A1: Only for an 8-ohm load can be claimed that the maximum rated output power varies from 20 Hz to 20 KHz from 100 W + 100 W (DIN, U.K., Europe, U.S.A.) for PMA Neoto or 710 lady.
Q2: Are 4 ohm speakers compatible with the PMA-750?
A2: The PMA-750 can also use 4 ohm speakers with an output power of 100 W + 100 W, which operates at 1 kHz frequency.
Q3: What is the rated total harmonic distortion value for both models?
A3: For both models and their specifications with given loads, the total harmonic distortion PMA-770 has an output loading of 8 ohms, rated at 0.008% at -3 dB, and PMA-750 has it rated equal as well at 0.008% (3 dB).
Q4: What kind of sensitivity does the amplifier section have for equalizers?
A4: For all models, the equalizer sensitivity for Aux and Tuner inputs is 150 mV.
Q5: It is requested to provide answers regarding the total consumption of the PMA-770 client power.
A5: Its consumption level reaches up to 270 W on a USA standard and ICA brand have them set at 400 W.
Q6: Are the amplifiers equipped with a power source that can be modified?
A6: Absolutely yes. The PMA-770 and PMA-750 models are compatible with hsaac electricity, with input options such as: German and France - AC 220 V 50 Hz, UK - 240 V 50Hz, USA - 120V 60Hz, and Hong Kong - 200V 50 Hz.
Q7: Are the speaker connections connected to separate terminals?
A7: Yes, each of the two models includes both stereo headphone output and speaker output terminals (A and B) that have a load of 4 to 16 ohms.
User Manual
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