Equipment information
Pioneer SX-750 Receiver
Manufacturer:
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Model:
SX-750
Date:
Category:
Group:
Description:
AM/FM Stereo Receiver
Information
Semiconductors
FET............................................................................
1
ICs..............................................................................
7
Transistors
................................................................42
Diodes.......................................................................40
TV Multimedia">Amplifier Section
Continuous Power Output from 20 Hertz to 20,000 Hertz (Both
channels driven) . . 50 watts per channel (8 ohms) 60 watts
per channel (4 ohms)
Total Harmonic Distortion
(20 Hertz to 20,000 Hertz, from AUX)
Continuous Rated Power Output ... No more than 0.1% 25 watts
per channel power
output, 8 ohms ......................No more than 0.05%
1 watt per channel power
output, 8 ohms ......................No more than 0.05%
Intermodulation Distortion
(50 Hertz: 7,000 Hertz=4:1, from AUX)
Continuous Rated Power Output . . No more than 0.1% 25 watts
per channel power
output, 8 ohms ......................No more than 0.05%
1 watt per channel power
output. 8 ohms........................No more than 0.05%
Damping Factor
(20 Hertz to 20,000 Hertz)................................... 30
Input (Sensitivity/Impedance)
PHONO ........................................ 2.5mV/50k ohms
MIC................................................. 5mV/50k
ohms
AUX ............................................ 150mV/50k ohms
TAPE PLAY 1............................... 150mV/50k ohms
TAPE PLAY 2............................... 150mV/50k ohms
TAPE PLAY 2 (DIN connector) ... 150mV/50k ohms PHONO
Overload Level (T.H.D. 0.1%)
............ 200mV (1 kHz)
Output (Level/Impedance)
TAPE REC
1..................................................150mV
TAPE REC
2..................................................150mV
TAPE REC 2 (DIN connector) ........ 30mV/80k ohms
SPEAKER................................................. A,
B, A+B
HEADPHONES................................. Low Impedance
Frequency Response
PHONO (RIAA equalization)
..........30 Hertz to 15,000 Hertz ±0.2dB
AUX, TAPE PLAY
...............10 Hertz to 50,000 Hertz ^B
Tone Control
BASS.........................................+8dB, —7dB (100 Hz)
TREBLE....................................+9dB, -7dB (10 kHz)
Filter
HIGH...............................................6 kHz
(6dB/oct.)
Loudness Contour (Volume control set
at -40dB position)____+6dB (100 Hz), +3dB (10 kHz)
Hum and Noise
(IHF, short-circuited, A Network, rated power)
PHONO
.............................................................70dB
AUX, TAPE PLAY.............................................90dB
FM Section
Usable Sensitivity MONO
. 10.7dBf (1.9/iV)
STEREO............
. !9.0dBf (9.8μν)
50dB Quieting Sensitivity
MONO
17.2dBf (4.0μν)
STEREO............
. 39.2dBf (50/iV)
Signal to Noise Ratio at 65dBf
MONO
.............. 72dB
STEREO ...........
............. 67dB
Distortion at 65dBf 100Hz..
MONO .
..............0.15%
STEREO
.............. 0.3%
1kHz ...
.MONO .
..............0.15%
STEREO
.............. 0.3%
6kHz ...
.MONO .
.............. 0.4%
STEREO
.............. 0.4%
Frequency Response............
30H/ to 15,000Hz dB
Capture Ratio .......................
.............1,0dB
Alternate Channel Selectivity . .
.............. 80dB
Spurious Response Ratio . . . .
.............. 90dB
Image Response Ratio...........
.............. 80dB
IF Response Ratio................
.............. lOOdB
AM Suppression Ratio...........
.............. 55dB
Muting Threshold..................
. 14dBf (2.8μν)
Stereo Separation.................
. 40dB (1 kHz), 30dB (30Hz
~ 15kHz)
Subcarrier Product Ratio
.............. 62dB
SCA Rejection Ratio..............
.............. 62dB
Antenna Input.......................
75 ohms unbalanced
Manual Type:
Service Manual
Pages:
79
Size:
9.25 Mbytes (9702463 Bytes)
Language:
english
Revision:
Manual-ID:
Date:
Quality:
Scanned document, all readable.
Upload date:
2015 09 27
MD5:
3e2c16eaf09f6e0a76481be0d40509f1
Downloads:
1235
Information
This Service Manual is applicable only to the KC, KU model.
CONTENTS
1.
SPECIFICATIONS ...
5
2. FRONT PANEL
FACILITIES ...
7
3. CONNECTION DIAGRAM
...
9
4. BLOCK
DIAGRAM ... 11
5. CIRCUIT DISCRETIONS
5.1 AM
Tuner ... 13
5.2 FM
Tuner ... 13
5.3 FM Muting
Circuit ... 15
5.4 Phono TV Multimedia">Equalizer
Amplifier ... 15
5.5 TV Multimedia">Microphone Circuit
... 15
5.6 Tone
Control ... 15
5.7 Protection
Circuit ... 16
5.8 Power TV Multimedia">Amplifier
Circuit ... 17
5.9 Power
Supply ... 17
6. ADJUSTMENTS
6.1 AM Section
... 18
6.2 FM
Section ... 19
6.3 MPX
Adjustment ... 20
6.4 Power TV Multimedia">Amplifier Section
... 21
7. DIAL CORD
STRINGING ... 22
8. LEVEL DIAGRAM
... 23
9.
DISASSEMBLY ... 24
10. PARTS LOCATION
10.1 Front Panel
View ... 25
10.2 Front Panel View (with removed front panel)
... 27
10.3 Top
View ... 29
10.4 Bottom
View ... 31
10.5 RearView
... 33
11. EXPLODED
VIEW ... 35
11.1 Parti
... 37
11.2 Part
II ... 38
11.3 Part
III ... 39
11.4 Part
IV ... 40
11.5 Part
V ... 41
11.6 Part
VI ... 42
11.8
Packing ... 44
12. SCHEMATIC DIAGRAMS P.C. BOARD PATTERNS AND PARTS LIST
12.1 Schematic
Diagrams ... 45
12.2 Miscellaneous
Parts ... 47
12.3 Internal Circuitry of Integrated
Circuits ... 48
12.4 Filter & Muting Assembly
(AWM-094) ... 50
12.5 Tone Control Assembly
(AWG-046) ... 52
12.6 Power TV Multimedia">Amplifier Assembly (AWH-046)
... 54
12.7 Power Supply & Protection Assembly
(AWR-099) ... 58
12.8 Power Supply Assembly (AWR-100)
... 62
12.9 TV Multimedia">Headphone Jack Assembly (AWX-106)
... 64
12.10 Tuner, AF & Control Assembly
(AWE-073) ... 65
12.11 TV Multimedia">Amplifier Assembly
(AWK-065) ... 73
12.12 De-emphasis Switch assembly (AWX-095)
... 74