Table Of Contents; Specifications - Pioneer SX-SW77 Service Manual

1
CONTENTS
SAFETY INFORMATION ..................................................................................................................................... 2
1. SPECIFICATIONS ............................................................................................................................................ 4
2. EXPLODED VIEWS AND PARTS LIST ............................................................................................................ 6
A
2.1 PACKING ................................................................................................................................................... 6
2.2 EXTERIOR................................................................................................................................................. 8
2.3 DISPLAY UNIT......................................................................................................................................... 10
3. BLOCK DIAGRAM AND SCHEMATIC DIAGRAM .......................................................................................... 12
3.1 OVERALL WIRING CONNECTION DIAGRAM AND BLOCK DIAGRAM ................................................ 12
3.2 MAIN ASSY (1/5) ..................................................................................................................................... 14
3.3 MAIN ASSY (2/5) ..................................................................................................................................... 16
3.4 MAIN ASSY (3/5) ..................................................................................................................................... 18
3.5 MAIN ASSY (4/5) ..................................................................................................................................... 20
3.6 MAIN ASSY (5/5) ..................................................................................................................................... 22
3.7 AC INLET, CONNECT and FL ASSYS .................................................................................................... 24
3.8 POWER SUPPLY UNIT............................................................................................................................ 26
B
3.9 WAVEFORMS .......................................................................................................................................... 28
4. PCB CONNECTION DIAGRAM ..................................................................................................................... 29
4.1 MAIN ASSY ............................................................................................................................................. 30
4.2 AC INLET and CONNECT ASSYS .......................................................................................................... 34
4.3 FL ASSY .................................................................................................................................................. 35
4.4 POWER SUPPLY UNIT............................................................................................................................ 36
5. PCB PARTS LIST ........................................................................................................................................... 38
6. ADJUSTMENT ............................................................................................................................................... 40
7. GENERAL INFORMATION ............................................................................................................................. 41
7.1 DIAGNOSIS ............................................................................................................................................. 41
7.1.1 TEST MODE ...................................................................................................................................... 41
C
7.1.2 SPECIFICATIONS OF SPEAKER SETUP ........................................................................................ 43
7.1.3 PROPOSAL OF DSP ERROR DISPLAY........................................................................................... 44
7.1.4 CIRCUIT DESCRIPTION OF DIGITAL AMP. SECTION .................................................................... 45
7.1.5 SPECIFICATIONS FOR THE PROTECTION CIRCUITS FOR THE DIGITAL AMPLIFIER ............... 46
7.1.6 CONDITIONS FOR SWITCHING THE ROTATION SPEED OF THE FAN ........................................ 47
7.1.7 DISASSEMBLY.................................................................................................................................. 48
7.2 IC ............................................................................................................................................................. 51
8. PANEL FACILITIES ........................................................................................................................................ 67

1. SPECIFICATIONS

D
SX-SW950
• Amplifier section
RMS Power Output :
Front, Center, Surround
Subwoofer . . . . . . . . . . . .
FTC Power Output :
Front, Center, Surround
Subwoofer . . . . . . . 50 W (45 Hz - 200 Hz, 1 % THD, 6 Ω)
E
• FM tuner section
Frequency range . . . . . . . . . . . . . . . . 87.5 MHz to 108 MHz
Antenna. . . . . . . . . . . . . . . . . . . . . . . . . . . 75 Ω, unbalanced
• AM tuner section
Frequency range . . . . . . . . . . . . . . . . 530 kHz to 1,700 kHz
Antenna . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Loop antenna
• Subwoofer section
Enclosure . . . . . . . . . . . . . . . . . . . . . . . . Bass-reflex floor type
System . . . . . . . . . . . . . . . . . . . . . . . . . 16 cm 1-way system
Speaker . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 cm cone type
Nominal impedance . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Ω
F
Frequency range . . . . . . . . . . . . . . . . . . . . 25 Hz to 1.0 kHz
Maximum Input Power . . . . . . . . . . . . . . . . . . . . . . . . 60 W
4
1
2
. . . . . . . . . . . . 60 W per channel
(1 kHz, 10 % THD, 6 Ω)
60 W (200 Hz, 10 % THD, 6 Ω)
. . . . . . . . . . . .
50 W per channel
(200 Hz, - 20 kHz 1 % THD, 6 Ω)
(magnetically shielded)
SX-SW77
2
3
• Miscellaneous
Power requirements . . . . . . . . . . . . . . . . AC 120 V, 50/60 Hz
Power consumption . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47 W
Power consumption in standby . . . . . . . . . . . . . . . . . . 0.2 W
Dimensions . . . . . 7 7 / 8 (W) x 14 3 / 4(H) x 17 3 / 16 (D) in.
200 (W) x 375 (H) x 437 (D) mm
Weight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 lb. 13 oz.
• Accessories
Remote control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Display unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
AA/R6 dry cell batteries . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Coaxial cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Display cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
AM loop antenna . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
FM wire antenna . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Power cord . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Warranty card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Operating instructions
3
4
9.0 kg
4