Pioneer sx 7 service manual

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REPAIR 8 ADJUSTMENTS ORDER NO.

ARP-O18-0

COMPUTER CONTROLLED
STEREO RECEIVER

X-7

MODEL SX-7 COMES IN FOUR VERSIONS DISTINGUISHED AS FOLLOWS:

Type Voltage Remarks
'ku ' Ac 120v orIIy i V ' 7 W 7 u.5.,x. now - - 7 I 7 «-
S - AC1 10V, 120V, 220V and 240V ISwilchable) I General upon model

, . ,777 H 7,,,7Vg
SIG AC1 IOV, I20. 220V and 240V ISINIlchable) U.$.Mlliurv model
KC . AC12OV only E Canada model WWI 777

o This service manual is applicable to the KU type. When repairing the KC, 8 and 8/6 types, please see
the additional service manual (ARP-019).

I For the circuit description, please refer to the model SX-7 service manual (ARROW).

C Ce manuel d'instruction se refére au mode do réglage, en francais.

0 Esta manual de servicio trata del método de ajuste escrito en upefiol.

1. SPECIFICATIONS ..................... 2 7. ELECTRICAL PARTS LIST .............. 17
2. FRONT PANEL FACILITES .............. 3 84 SCHEMATIC DIAGRAM ................ 21
3. PARTS LOCATION .................... 6 9. EXPLODED VIEW .................... 25
4. PACKING ........................... 7 10. ADJUSTMENTS ..................... 30
5. BLOCK DIAGRM ...................... s néGLAGE ......................... 32
6. P.C.BOARDSCONNECTION DIAGRAM ...... 9 MUST-I: ........................... 34
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1 . SPECIFICATIONS

AmplifierSection

Continuous Average Power Output is 60
watts per channel, min, at 8 ohms from
20 Hertz to 20,000 Hertz with no more
than 0.009% total harmonic distortion."

Total Harmonic Distortion" (20 Hertz to 20,000 Hertz,
8 ohms, from AUX/VIDEO)

continuous rated power output . No more than 0.009%

30 watts per channel power output

...................... No more than 0.009%

lntermodulation Distortion (50 Hertz : 7,000 Hertz -
4 r I, 8 ohms, from AUXNIDEOI

continuous rated power output . No more than 0.009%
Damping Factor (20 Hertz to 20,000 Hertz, 8 ohms)

................................... 50
Input (Sensitivity/Impedance)
PHONO MM ............... 2.5mV/150 kilohms
PHONO MC ................ 025mV/50 kilohms
TUNER, AUX/VIDEO TAPE PLAY 1, 2
........................ 150mV/50 kilohms
Phono Overload Level iT.H.D. 0.009%, 1.000Hz from
R EC OUT)
PHONO .......................... lSOmV
Output (Level/Impedance)
TAPE REC 1, 2 ............. 150mV/2.2 kilohms
Frequency Response
PHONO (RIAA Equalization)
.................... 20Hz to 20.000Hz:0.3dB
TUNER, AUXNIDEO, TAPE PLAY 1, 2
..................... 5H2 to roo.ooom:gda
Tone Control
BASS ........................ 18:18 (100Hz)
TREBLE ...................... :SdB (10km)
Filter
SUBSONIC .................. 15H: (NB/act.)
Loudness Contour (Volume control set at -40d8 position)
................. +6dB (100Hz), +3118 (lokHz)
Hum and Noise (IHF, short circuited A network)
PHONO MM ......................... 8066
PHONO MC .......................... 67dB
Muting ............................. -25dB
FM Tuner Section
Usable Sensitivity . Mono; 10.3dBl (IHFl (0.9uV, 75 ohms)
5068 Ouieting Sensitivity
............... Mono; 15.7dBI (l.6uV, 75 ohms)
Stereo; 37dBl (19.5uV, 75 ohms)
Signalvto-Noise Ratio ......... Mono; 80d8 (at 851380

Stereo; 7Sd8 (at 85dBiI

Distortion (at GSdBI)

Mono ......................... lOOHz:0.1%
IkHz; 0.07%
6kHz: 0.15%
Stereo ........................ 100Hz; 0.2%
lkHz: 0.1%
6kHz; 0.25%
Capture Ratio .......................... 1118
Alternate Channel Selectivity ......... 400kHz: aoaa
Stereo Separation ................... ikHz; 45:18
30Hz to 15kHz;35dB
Frequency Response .......... 20Hz to 15kHz 20.5118
Spurious Response Ratio ................... 90:18
Image Response Ratio ..................... BOdB
IF Response Ratio ....................... 90d3
AM Suppression Ratio ..................... 55dB
Subcarrier Product Ratio ................... 40:18
SCA Relection ratio ...................... BOdB
Muting Threshold ................. 29.3dBf IBuV)
Antenna Input . . 300 ohms balanced, 75 ohms unbalanced
AM Tuner Section
Sensitivity
IHF, ferrite antenna ................. 300uV/m
IHF, external antenna .................. ISuV
Selectivity ............................. 27d8
Signal-to-Noise Ratio ...................... SOdB
Image Response Ratio ..................... 40d8
IF Response Ratio ....................... BOdB
Antenna ........... Built-in ferrite loopstick antenna
Miscellaneous
Power Requirements .............. AC 120V, 60Hz
Power Consumption ....... 30M (UL), 350VA (CSA)
Dimensions .......... 420(W) x 13004) x 370(D) mm
16-9/16lW) x 54/8IH) x 14-9/16(D) in
Weight (without package) .......... 9.6 kg in lb 3 oz)
Furnished Parts
FM T-type Antenna ........................ 1
Station Card ............................ 2
Operating lnstructions ...................... 1

'Measured pursuant to the Iederal Trade Commissions Trade
Regulation rule on Power Output Claims for Amplifier.

' 'Musund by Audio Spectrum Analyzer.
NOTE:

Specifications and design subject to possible modification without
notice.