Sony STR-V220 User manual

– 1 –
MICROFILM
US Model
SPECIFICATIONS
SERVICE MANUAL
FM STEREO/FM-AM RECEIVER
STR-V220
— Continued on next page —

STR-V220
– 7 – – 8 –
4-2. SCHEMATIC DIAGRAM – MAIN (1/3) SECTION –
• See page 6 forWaveforms.
• See page 13 for PrintedWiring Board.
• See page 23 for IC Block Diagrams.
(Page 19)
(Page 11)
(Page 11)
(Page 17)

STR-V220
– 9 – – 10 –
4-3. SCHEMATIC DIAGRAM – MAIN (2/3) SECTION –
• See page 13 for PrintedWiring Board.
(Page 11)
(Page 20)

STR-V220
– 11 – – 12 –
4-4. SCHEMATIC DIAGRAM – MAIN (3/3) SECTION –
• See page 24 for IC Block Diagrams.
(Page 9, 10)
(Page 8)
(Page 8)

STR-V220
– 17 – – 18 –
4-7. SCHEMATIC DIAGRAM – DISPLAY SECTION –
• See page 6 forWaveforms.
• See page 25 for IC Block Diagrams.
• See page 26 for IC Pin Function.
(Page 7)
(Page 19)
(Page 20)
(Page 20)

STR-V220
– 19 – – 20 –
4-8. SCHEMATIC DIAGRAM – PANEL SECTION –
(Page 17)
(Page 8) (Page 9)
(Page 18)
(Page 18)

STR-V220
– 23 – – 24 –
4-10. IC BLOCK DIAGRAMS
• Main section
IC301 LV1035M
STRIM
OSC
VOL
VOL
VCA VCA
A
B
A
B
VCA VCA
VCA VCA VCA VCA
DEV
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
S
S
S
AAS
B
BB
A
B
C
B
LR
AA
A
B
A
B
A
B
A
B
A
B
S
VDD
PCM
PCM
CONTROL
SRAM
IN
FILTER
R
L
C
S
R
A
B
A
B
A
B
A
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
L BPF2
L BPF1
RT IN
LT IN
DC CUT
C MODE
GND
NS BPF1
OSC
NS BPF2
ENABLE
DATA
CLK
DATA
CLK
VSS
OSC OSC
VDD
A/D
NS
D/A
DC CUT
DC CUT
VCC
DET
IREF
GND
S-OUT
R-OUT
L-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 BPF3
64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49
48
47
46
45
44
43
41
40
39
38
37
36
35
34
33
1817
16
15
14
13
12
11
10
9
7
3
4
5
6
1
2
8
19 20 21 22 23 24 25 26 27 28 29 30 31 32
42
IC401 LC7822
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
CONTROL
LATCH
SHIFT RESISTOR
LEVEL SHIFT
CL
DI
CE
VEE
OUT
IN
OUT
IN
OUT
IN
VSS
S
RESET
VDD
OUT
ININ
OUT
IN
OUT
IN
IC950 NJM2103D
1
2
3
45
6
7
8
V+
VSB/SESIN
VSA
RESET
GND
OUTC
VSC
CR
VREF
+–
–+
–
+
–
+
Q
R S
IC501 LA1838
ALC
BUFF
AM
OSC
AM
MIX
AM
RF. AMP
AGC
IF DET
S-CURVE
AM/FM
IF
BUFF
REG
TUNING
DRIVE
GND VCC
PILOT
DET
VCO
FF
STEREO
DRIVE
STEREO
SW
MUTE
FF FF
FM
IF
FM
DET
DECODER
ANTI BIRDIE
12 3 4 5 6 7 98
20 19 18 17 16
15141110
212223242527 262930
OSC.BUFF FM-SD.ADJ AM-OSC REG FM-AFC AM-RF-IN AGC MPX-IN FM-DET OUT AM-DET OUT OUT L OUT R AMP-IN L AMP-IN R AMP OUT R AMP OUT L
VCO-STOP
STEREO
AM/FM
AM. SD
FM. SD
AM. SD ADJ
IF-BUFF
MUTE
VCC
FM DET
FM-IN
AM-MIX
FM-IF
AM-IF
GND
TUNED
S METER
FM S METER
AM
COMP
SD
AM
12 13
PHASE
DET
28

– 25 –
• Display section
IC202 BA6208
1 2 3 4 5 6 7 89
NC
OUTPUT 2
Vcc
GND
NC
INPUT 2
INPUT 1
NC
MOTOR
DRIVE
MOTOR
DRIVE
REG
SWITCH
SWITCH
OUTPUT1
IC502 LC72131
PHASE
DETECTOR
CHARGE PUMP
SWALLOW COUNTER
1/16, 1/17 4BITS
12BITS
PROGRAMMABLE
DIVIDER
UNIVERSAL
COUNTER
REFERENCE
DIVIDER
POWER
ON
RESET
1/2
C2B
I/F
13456810 11
18 17 16 15 12
13
19
20
2122
XOUT
VSS AOUT AIN
PD
VDD FMIN
AMIN
XIN
D OUT
S CLK
S DATA
CE
IFIN
I/O IN
I/O IN
MONO
FM/AM
UNLOCK
DETECTOR
DATA SHIFT REGISTER LATCH