Sony STR-W555 User manual

– 1 –
STR-W555
AEP Model
UK Model
E Model
Australian Model
Chinese Model
Tourist Model
SPECIFICATIONS
SERVICE MANUAL
FM STEREO/FM-AM RECEIVER
STR-W555 is the tuner and amplifier
section in MHC-W555.
MICROFILM
Photo : E model

– 23 – – 24 –
STR-W555
5-3. SCHEMATIC DIAGRAM –TUNER SECTION – (AEP, UK model)
• See page 22 forWaveforms.
• See page 52 for IC Block Diagrams.
(Page 32)

– 27 – – 28 –
STR-W555
5-6. SCHEMATIC DIAGRAM –TUNER SECTION – (East European, CIS model)
• See page 14 forWaveforms.
• See page 53 for IC Block Diagrams.
(Page 32)

– 31 – – 32 –
STR-W555
5-8. SCHEMATIC DIAGRAM – MAIN (1/2) SECTION –
• See page 54 for IC Block Diagrams.
(Page 35)
(Page 33) (Page 33) (Page 34) (Page 34)
(Page 41)
(Page 23, 32)

– 33 – – 34 –
STR-W555
5-9. SCHEMATIC DIAGRAM – MAIN (2/2) SECTION –
• See page 29 for Printed Wiring Board.
• See page 54 for IC Block Diagrams.
(Page 46)
(Page 51) (Page 35) (Page 46) (Page 38)
(Page 38)
(Page 37)
(Page 32)(Page 32)(Page 31)(Page 31)

– 35 –
5-10. SCHEMATIC DIAGRAM – AV/MIC SECTION –
• See page 54 for IC Block Diagrams.
(Page 33)
(Page 41)
(Page 32)
(Page 38)

5-12. SCHEMATIC DIAGRAM – POWER AMP SECTION –
– 37 – – 38 –
STR-W555
(Page 34)
(Page 34)
(Page 34)
(Page 35)

5-12. SCHEMATIC DIAGRAM – DISPLAY SECTION –
• See page 54 for IC Block Diagrams.
– 41 – – 42 –
STR-W555
(Page 46)
(Page 32) (Page 45)
(Page 35)

– 45 – – 46 –
STR-W555
5-16. SCHEMATIC DIAGRAM – SLIDING PANEL SECTION –
• See page 54 for IC Block Diagrams.
(Page 42)
(Page 33)
(Page 41)
(Page 33)

– 51 –
STR-W555
5-19. SCHEMATIC DIAGRAM – TRANS SECTION –
(Page 33)

– 52 –
•Tuner section
IC21 LC72130
5-20. IC BLOCK DIAGRAMS
IC41 LA1838
PHASE DETECTOR
CHARGE PUMP
SWALLOW COUNTER
1/16, 1/17 4BITS
12BITS PROGRAMMABLE
DRIVER
UNIVERSAL
COUNTER
REFERENCE
DIVIDER
POWER
ON
RESET
1/2
C2B
I/F
12 3 45 6 7 8 9 10
20 19 18 17 16 15 14 13
1211
21222324
XOUT VSS AOUT2 AIN2 PD2 PD1 AIN1 AOUT1 VDD FMIN AMIN IO2
XIN
D0
CL
D1
CE
BO5 BO1 BO2 BO3 BO4
IO1
IFIN
UNLOCK
DETECTOR
DATA SHIFT REGISTER LATCH
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 9
8
20 19 18 17 16
151411
10
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

– 53 –
IC1701 IR3R42
IC1702 MC14053BCP IC1751 NJM4558D
IC1752 BU1922
OSC
1/2
1/2
PHASE
WAVEFORM
SEP.
GATE
SAMPLE
& HOLD
BUFFER
REGULATOR
PHASE
COMPARATOR
PHASE
COMPARATOR 2
MUTE
TRIGGER
12 3 45 6 7 8 9 10
20 19 18 17 16 15 14 13 12 11
AMP
AMP
AMP
LAMP
VCO STOP
ST
LOUT
ROUT
LHC
RHC
POUT
IN
VCC
GND VCO LPF1A LPF1B DETIN LPF2A LPF2B SUBIN SUBOUT MON
1
2
3
4
5
6
7
8
B1
B0
C.COM
CO
INH
VEE
VSS
VDD
B.COM
A.COM
A1
A0
A
B
C
C1
9
10
11
12
13
14
15
16
OPEN
OPEN
OPEN
QUALITY BIT
GENERATOR
DEFFERENTIAL
DECODER
BIPHASE
SYMBOL
DECODER
OSCILLATOR
AND
DIVIDER
57kHz
BANDPASS
(8th ORDER)
CONTAS LOOP
VARIABLE AND
FIXED DIVIDER
REFERENCE
VOLTAGE
ANTI-
ALIASING
FILTER
CLOCKED
COMPARATOR
TEST LOGIC AND OUTPUT
SELECTOR SWITCH
RECONSTRUCTION
FILTER
141516 13 12 11 10 9
321 4 5 6 7 8
CLOCK REGENERATION
AND SYNC
VP1
RDCL TS7 OSCO OSCI VDDD VSSD TEST TSTL
D
QUAL
RDDA
Vref
MUX
VDDA
VSSA
CIN
SCOUT
+–
6
7
5
8
B
+–
2
1
3
4
A
A OUT
A IN–
A IN+
VEE
VCC
B OUT
B IN–
B IN+

– 54 –
• Main (2/2) section
IC112 MC14052BCP
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
2X0
X2
VDD
X1
XCOM
X0
X3
A
B
VSS
VEE
INH
2X1
2X3
2XCOM
2X2
IC402 MC14053BCP
1
2
3
4
5
6
7
8
B1
B0
C.COM
CO
INH
VEE
VSS
VDD
B.COM
A.COM
A1
A0
A
B
C
C1
9
10
11
12
13
14
15
16
OPEN
OPEN
OPEN
• Main (1/2) section
IC401 M65850P
OSCILLATOR
1/2 VCC
AUTO
RESET
LPF1
MAIN
CONTROL
A/D
20KBIT
SRAM
LPF2
D/A
12 3 45 6 7
89
10
14 13 12 11
CLOCK
RESET
MO
MI
D1 DO0
DO1
VCC CLOCK REF OP2IN OP2OUT LPF2IN LPF2OUT
LPF1IN
LPF1OUT
OP1OUT
OP1IN
CC1 CC2
GND
1 2 3 4 5 6 7 8
OVER LOAD DET
F/F
OFFSET DET
LATCH/
AUTORESET
VCC ON
MUTE
AC OFF
DET
VCC
IC851 uPC1237HA
• MIC/ECHO section
IC6002 M65850P
OSCILLATOR
1/2 VCC
AUTO
RESET
LPF1
MAIN
CONTROL
A/D
20KBIT
SRAM
LPF2
D/A
12 3 45 6 7
89
10
14 13 12 11
CLOCK
RESET
MO
MI
D1 DO0
DO1
VCC CLOCK REF OP2IN OP2OUT LPF2IN LPF2OUT
LPF1IN
LPF1OUT
OP1OUT
OP1IN
CC1 CC2
GND

– 55 –
• Display section
IC505 MC14053BCP
2
3
14
1
f04
13 f
12 VCC
11 NC
10 NC
15 f03
5
GND
6
BIAS
C
7
NC
8
NC
9
NC
4
16 f02
17 f01
18 RESET
RESET
C
PREF
LINE
NF
LINE
IN
REFFERENCE
CURRENT
BPF DET
BPF DET
BPF DET
BPF DET
DET
RESET
Bias
1
2
3
4
5
6
7
8
B1
B0
C.COM
CO
INH
VEE
VSS
VDD
B.COM
A.COM
A1
A0
A
B
C
C1
9
10
11
12
13
14
15
16
OPEN
OPEN
OPEN
• Panel/Motor section
IC891 LB1641
IC506 BA3833F
12 3 45 6 7 8 9 10
GND
MOTOR
DRIVE
NOISE
FILTER
CLAMP
FWD.IN
REV.IN
VCC 1 VCC 2
NOISE
FILTER
MOTOR
DRIVE
MOTOR
DRIVE
MOTOR
DRIVE
T.S.D O.C.P
FWD/REV/STOP
CONTROL LOGIC