Pioneer sa 900

Pioneer sa 900 DEFAULT

Model SA-900 is an professional-type all silicon solid state pre/main stereo amplifier.

The SA-900 is one of Pioneer's most advanced amplifiers. It contains professional features nestly compacted into an all solid state set that's ideal for use with high performance stereo systems. It presents a powerful 200 watt integrated amplifier of exceptional flexibility. Only the finest and most expensive materials have been used throughout, from the low noise silicon transistors in the MC and front end sections to the special Brazilian rosewood tipping the front panel. The control amplifier has FET end advanced 3-stage E-S (Emitter-Source) feedback circuitry. The pre and main amplifiers can be used independently and there are inputs for a wide variety of cartridges and 2 sets of speaker terminals.

 


Features

Preamplifier is composed of three precision made sections.

MC Section: using very special low-noise transistors, this section adequately amplifies low output moving coil cartridges. Has very low noise level.

Front-end Section: uses low-noise silicon transistors and a direct coupled 3-stage E-E feedback circuit, resulting in significantly better frequency response, a decrease in harmonic distorion and improved tonal quality.

Control Amplifier Section: features FET and a direct-couples 3-stages E-S feedback circuit. Gives a high S/N ratio, and minimal distortion.

Truly Precise Tone Controls

Despite their markings, most sets have controls  that are very approximate. In fact, they are not usually flat even when set at flat. The SA-900 is radically different. Set its tone controls at flat, and the signal really comes out flat. Accurate 3 dB step controls for individual bass and treble adjustment.

Power-Packed main Amplifier

This superior main amplifier puts out a full 145  watts at 8 ohms with distortion under 0,5% (IHF music power). That is more than enough to fill a concert hall. Damping factor is better than 67 at 8 ohms. Silicon varistor is used for temperature compensation and stable performance at all times.

Independent use of Pre and Main Amplifier

A selector switch on the rear panel allows independent use of pre and main amps, desirable for multi-channel systems. The preamplifier is designed to be used as a control amplifier.

Exceptional Flexibility -  unusual Range of Inputs and Outputs

The SA-900 features, for example, two phono inputs. By means of push-button selection, one input accomodates either a high output MM type cartridge or a low output MC cartridge. Naturally  there's tape monitor for Tape/Source comparsion, and  there are also two sets of speaker outputs.

A Host of Audio Refinements

A few Pioneer extras include Hi and Low filters, and a special muting switch of -20 dB. And the SA-900 can also be used as a channel amplifier by setting the channel filter between pre and main amplifier sections.

 


Specifications

Audio Section

Circuitry:  Quasi-complementary single ended push-pull

Music Power Output:

200 Watts at 4 Ω (distirtion below 0,3% at 1 kHz/IHF)

145 Watts at 8 Ω (distortion below 0,3% at 1 kHz/IHF)

Continuous Power Output:

84 W / 84 W at 4 Ω (distortion below 0,3% at 1 kHz)

60 W / 60 W at 8 Ω (distortion below 0,3% at 1 kHz)

Continuous Power Output  (both Channels driven)

64 W + 64 W at 4 Ω (distortion below 0,3% at 1 kHz)

50 W + 50 W at 8 Ω (distortion below 0,3% at 1 kHz)

Total Harmonic Distortion: less than 0,08% ( 45 W at 1 kHz)

Frequency Response:  20 Hz to 50 kHz ±1 dB

Power Bandwidth:  20 Hz to 50 kHz (distortion below 0,3% constant/IHF)

Signal-to-Noise Ratio: 

Phono :  better than 85 dB

Aux :  better than 95 dB (volume, maximum, tone flat, at the rated output/IHF)

Inputs Sensitivity/Impedance (at 1 kHz)

Phono MM :  3,1 mV/ 50 k Ω 

Phono MC :  0,155 mV/ 150 k Ω 

Phono CER :  71 mV/ 100 k Ω 

MIC :  1,9 mV /50 k Ω 

Tuner :  180 mV / 200 k Ω 

Tape Monitor :  180 mV / 200 k Ω 

Tape head :  1,8 mV / 150 k Ω 

Aux :  180 mV / 200 k Ω

Main-In :  500 mV / 100 k Ω  

Damping Factor:  better than 67 at 8 Ω (at 1 kHz)

Output Terminals and Jacks

Speakers :  4 to 16 Ω

Stereo Headphones Jack, Pre-Out :  3 V

Simultaneous Tape Recording :  180 mV

Tape Recording/playback Jack :  DIN standard

Center Channel Output :  500 mV

Equalization Curves: 

Phono ;  NFB type RIAA,

Tape :  NFB type NAB

Tone Controls (3 dB step)

Bass :  -9 dB to +12 dB at 100 Hz

Treble :  -12 dB to +9 dB at 10 kHz

Filters: 

Low :  -6 dB ( 12 dB/oct) at 50 Hz

High :  -6 dB  (12 dB/oct) at 10 kHz

Loudness Contour:  Switchable to On-Off

+14 dB at 50 Hz

+7 dB at 10 kHz

Residual Noise:  less than 0,8 mV at 8 Ω (volume, mninmum, tone flat)

Muting :  -20 dB (switchable On/Off)

Crosstalk (1 kHz):

Aux :  less than -50 dB

Phono :   less than -48 dB

Power Supply:  Bridge rectifier using silicon diodes

Power Requirements:  110, 117, 130, 220, 240 Volts (switchable) 50/60 Hz AC

Power Consumption:  250 VA (max)

Dimensions (W x H x D):  405 x 140 x 339 mm (1-15/16" x 5-1/2" x 13-11/32")

Weight (Net):  12,3 kg  (27 lbs)

Sours: https://stereonomono.blogspot.com/2020/12/pioneer-sa-900-amplifier.html

Pioneer SA-900

Manual Library / Pioneer

Solid State Stereo Amplifier (1970-71)

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Pioneer SA-900

Description

The Pioneer SA-900 has high performance pre-amplifiers and power amplifier stages for large output, an extremely high signal to noise ratio and an accurate equaliser characteristic.

Specifications

Power output: 50 watts per channel into 8Ω (stereo)

Frequency response: 25Hz to 40kHz

Total harmonic distortion: 0.3%

Damping factor: 50

Input sensitivity: 1.9mV (mic), 0.155mV (MC), 3.1mV (MM), 7.1mV (ceramic), 180mV (line)

Signal to noise ratio: 80dB (MM), 95dB (line)

Speaker load impedance: 4Ω to 16Ω

Semiconductors: 2 x FET, 29 x transistors, 7 x diodes

Dimensions: 405 x 140 x 339mm

Weight: 12.3kg

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Comments

Sours: https://www.hifiengine.com/manual_library/pioneer/sa-900.shtml
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Pioneer x-cm66d belső táp kiváltása/javítása

Sziasztok!

Szívok egy pioneer mini HiFi-vel. Belül egy nagyon gagyi kínai 18V tápja van. Ez megy a main boardra, ahol fel van robbanva egy 8 lábú, smd IC. Kép mellékelve. Elvileg talán? TPS54335 lenne?

Szerintetek?

Van esetleg valakinek a keze ügyében ilyen hifi? A kis kapcsitáp ezzel az IC-vel mekkora tápfeszt csinál a 18V-ból? Kipróbálnám labortápról, mert ha proci halott, értelmetlen megremdelni, várni rá, stb..

A kép alapján elképzelhető, hogy TPS54335? Illetve ha az, akkor melyik alfaja.. mert van TPS54335, TPS54335A, TPS343352A

Rajzot, SM-et keresetem mindenhol.. sajna kapufa..

Köszi!

Így néz ki: https://www.mall.hu/mikro-hifi-rendszer/pioneer-x-cm66-minihifi-feher

Cd, wifi, netradió, dab,+...

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Sziasztok! A címbeli autórádió előlapi gombjai nem működnek ( egyik pillanatról a másikra ), a hangerő szabályzás megy, kijelző jó. Jelenleg a CD-t tudom rajta hallgatni, mert a CD kiadás-vissza után automatikusan elindítja, de nem tudok léptetni sem a gombokkal ( gyakorlatilag egyik gomb sem megy! )! Ha van valami gyakorlati tapasztalat, akkor előre is köszönöm! u.i. Raktam fel képeket ( elnézést, a másodikat nem tudtam élesebbre :) ! )!

Pioneer vsx 418 újraélesztése

Sziasztok, van egy pioneer VSX-418 tip házimozi erősítőm, amit hibásként vettem. Nekiláttam a hibakeresésnek, a standby tápon kívül nem működött semmi, bekapcsolni sem lehetett, tehát tényleg halottnak látszott. Minden nap keresgéltem, és találtam is jónéhány hibát, kontakt, zárlatos és szakadt alkatrészek. Ezek javítása után a gép már majdnem teljesen működő volt, de mivel a D+5v tápját ideiglenesen kellett adnom a stabilizátor panelről, ami a hűtőbordán van (a saját ic-je is hibás volt), egy véletlen folytán a krokodilcsipesz lecsúszott az átkotésről, és persze odatalált a 12v-ra... Most ott tartok kb. Mint az elején. Látszólag a D+5v körök rendben vannak. Jelenleg itt tartok :
- az AC_WUP folyamatosan 3.3voltot ad, tehát behúz a táptrafó relé, minden feszültség megvan
- a védelmi körök magas szinten vannak (4,8v), dcdet, ovldet, xprotect, de csak ha a kijelző panelt nem csatlakoztatom a szalagkábelével, amint rádugom eltűnik ez a 3 magas szint a syscom 72,73,89 lábairól. A táptrafó relé viszont nem kapcsol le!
​​​​​​Most már 2hete szenvedek vele, jó lenne kideríteni hogy menthető - e, ebben szeretnék segítséget kérni nálam ilyen téren jártasabb szakiktól!
Köszönöm szépen előre is! 
​​​​​​

Sours: https://elektrotanya.com/pioneer_sa-900_sch.pdf/download.html
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Pioneer SA-900

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Czech RepublicBazos Czechia
Pioneer SA-900 @ Bazos Czechia
PIONEER - sa 900 - pul stoleti stary vintage zesilovacCzech Republic Bazos Czechia CZK 12,500 Oct 5, 2021
Czech RepublicAUKRO
Pioneer SA-900 @ AUKRO
PIONEER SA-900 STEREO AMPLIFIERCzech Republic AUKRO CZK 1,199,9130% Sep 25, 2021
GermanyeBay Kleinanzeigen
Pioneer SA-900 @ eBay Kleinanzeigen
Pioneer SA900 + TX900 Topmodel und die größten SA SM SX SC TXGermany eBay Kleinanzeigen €1,500 Sep 2, 2021
USBonanza
Pioneer SA-900 @ Bonanza
Pioneer SA-900 Amplifier Service Manual *NO FRONT COVER Original*US Bonanza $13 Jul 9, 2021
CanadaKijiji CA
Pioneer SA-900 @ Kijiji CA
PIONEER SA-900 INTEGRATED AMPLIFIER / TX-900 TUNERCanada Kijiji CA CA$600 Dec 10, 2019

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