Sony STR-VX500 User manual

SERVICE MANUAL
MICROFILM
STR-VX500
E Model
FM STEREO/FM-AM RECEIVER
SPECIFICATIONS
This set is the tuner and amplifier
section in MHC-VX500.
Amplifier section
The following measured at AC 120, 220, 240V 50/60 Hz
DIN power output (Rated) (FRONT)
120 + 120W (6 Ωat 1kHz DIN)
Continuous RMS power output (Reference)
FRONT SPEAKER: 150 + 150W
(6 Ωat 1kHz, 10% THD)
Inputs MD/VIDEO 1 IN (phono jacks): voltage
450/250mV, impedance 47kΩ
AV INPUTAUDIO (phono jacks): voltage
250mV, impedance 47kΩ
MIX MIC 1/2 (phone jack): sensitivity 1mV,
impedance 10kΩ
Output MD/VIDEO 1 OUT (phono jacks): voltage
450/250mV, impedance 1kΩ
PHONES (stereo phone jack): accepts
headphones of 8Ωor more.
FRONT SPEAKER:
accepts impedance of 6 to 16Ω
REAR SPEAKER:
accepts impedance of 16Ω
SUPER WOOFER:
Voltage 1V, impedance 1kΩ
Tuner section
FM stereo, FM/AM superheterodyne tuner
FM tuner section
Tuning range 87.5 – 108.0MHz
Antenna terminals 75Ωunbalanced
Intermediate frequency 10.7MHz
AM tuner section
Tuning range MW: 531 – 1,602kHz (with the MW tuning
interval set at 9kHz)
530 – 1,710kHz (with the MW tuning
interval set at 10kHz)
SW: 5.95 – 17.90MHz (with the SW tuning
interval set at 5kHz)
Intermediate frequency 450kHz
Antenna AM loop antenna External antenna terminal
General
Power requirements 120V, 220V or 230 – 240V AC, 50/60Hz
Adjustable with voltage selector
Power consumption 290W
Dimensions (w/h/d) Approx. 288 ×205 ×375mm
Mass Approx. 8.6kg
Design and specifications are subject to change without notice.

STR-VX500
1414
4-4. SCHEMATIC DIAGRAM MAIN (1/2) SECTION • Refer to page 27 for IC Block Diagrams.

STR-VX500
1515
4-5. SCHEMATIC DIAGRAM MAIN (2/2) SECTION • Refer to page 13 for Printed Wiring Board.
• Refer to page 27 for IC Block Diagrams.
0.8
0.1
Q854
BN1F4M
Q855
2SC2958L
RELAY SWITCH
R857
22k
0
The components identified by mark !or dotted
line with mark !are critical for safety.
Replace only with part number specified.

STR-VX500
1616
4-6. SCHEMATIC DIAGRAM POWER AMP SECTION
The components identified by mark !or dotted
line with mark !are critical for safety.
Replace only with part number specified.

STR-VX500
1818
4-8. SCHEMATIC DIAGRAM DISPLAY SECTION • Refer to page 28 for IC Block Diagrams.
• Refer to page 12 for Waveform.
EA MODEL
MY,SP,IA,HK
MODEL

STR-VX500
2020
4-10. SCHEMATIC DIAGRAM SLIDING PANEL SECTION • Refer to page 28 for IC Block Diagrams.

23
4-13. SCHEMATIC DIAGRAM TRANS SECTION
STR-VX500
(Page 15)
16
T6.3AL
250V
2.5A
2.5A
The components identified by mark !or dotted
line with mark !are critical for safety.
Replace only with part number specified.

24
4-14. SCHEMATIC DIAGRAM AV/MIC SECTION
STR-VX500
• Refer to page 28 for IC Block Diagrams.

26
• MAIN BOARD
IC300 LV1041M
4-16. IC BLOCK DIAGRAMS
12
20
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
19
17
18
20
21
32
31
30
2928
27
26
25
24
23
22
33
44
43
42
41
40
39
38
3736
35
34
73
7475
76
77
78
79
80 72 65
66
67
68
6970
71
52
51
50
49
48
47
46
45
53
54
55
56
57
58
59
60
61
62
63
64
STRIM
OSC
VOL
VOL
VCA VCA P
B
P
B
VCA VCA
VCA VCA VCA VCA
IEV
NOISE
GEN
NOISE
FILTER
BPF
CONTROL
CH
CONTROL
BPF
V REF
STRIM
S
MODE
RECT
RECT
DC
CUT
B NR
OUT
FILTER
DATA
DECODER
VOL/
MUTE
BPF
RECT
LOGIC
FF
LOGIC
FF RECT
C MODE
LOGIC LOGIC
MASTER
VOL
NF
SW
S
S
S
PPB
B
BB
P
B
C
D
R
L
CS
LR
PP
P
B
P
B
P
B
P
B
P
B
S
MASTER VOL
VDD
PCM
PCM
CONTROL
SRAM
IN
FILTER
R
L
C
S
R
P
B
P
B
P
B
P
B
L
L
R
L
R
R BPF2
R BPF1
S DC OUT
C DC OUT
R DC OUT
L DC OUT
V REF
VCC
C OUT
S OUT
R OUT
L OUT
GND
L IN
R IN
S IN
DELAY OUT
C VOL IN
DET
IREF
R OUT
R NF
L NF
L OUT
L BPF2
L BPF1
RT IN
LT IN
DC CUT
C MODE
GND
NS BPF1
OSC
NS BPF2
ENABLE
DATA
CLK
DATA
CLK
ENABLE2
VSS
OSC
OSC
VDD
A/D
NS
D/A
DC CUT
VCC
C VOL OUT
C OP IN
GND
C OP NF
C OP OUT
VOL REF
S OP OUT
S OP NF
S OP IN
S VOL OUT
L RECT
DC CUT4
R RECT
DC CUT3
L BPF3
VLR TH
VLR 1 VLR 2
VCS 2 VCS 1
VCS TH
L+R RECT
DC CUT2
L-R RECT
DC CUT1
R DET3
OP VREF
S VOL IN
S OUT
DC CUT

27
IC401 M65850P
OSCILLATOR
1/2 VCC
AUTO
RESET
LPF1
MAIN
CONTROL
A/D
20KBIT
SRAM
LPF2
D/A
12 3 45 6 7
891014 13 12 11
CLOCK
RESET
MO
MI
D1 DO0
DO1
VCC CLOCK REF OP2IN OP2OUT LPF2IN LPF2OUT
LPF1IN
LPF1OUT
OP1OUT
OP1IN
CC1 CC2
GND
IC851 µPC1237HA
1 2 3 4 5 6 7 8
OVER LOAD DET
F/F
OFFSET DET
LATCH/
AUTORESET
V
CC ON
MUTE
AC OFF
DET
V
CC