Sony XAV-77 Service Manual ▷ View online
XAV-77
25
25
6-5.
NOTE FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS
Note on Printed Wiring Board:
•
•
X
: parts extracted from the component side.
•
Y
: parts extracted from the conductor side.
•
: Pattern from the side which enables seeing.
(The other layers' patterns are not indicated.)
Note on Schematic Diagram:
• All capacitors are in
• All capacitors are in
µ
F unless otherwise noted. pF:
µµ
F
50 WV or less are not indicated except for electrolytics
and tantalums.
and tantalums.
• All resistors are in
Ω
and
1
/
4
W or less unless otherwise
specified.
•
f
: internal component.
•
C
: panel designation.
•
A
: B+ Line.
•
B
: B– Line.
•
H
: adjustment for repair.
• Power voltage is dc 14.4V and fed with regulated dc power
supply from ACC and BATT cords.
– MAIN/FRONT Boards –
• Voltages and waveforms are dc with respect to ground
• Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions or color bar signal
input conditions.
no mark : FM (Monitor is opened)
input conditions.
no mark : FM (Monitor is opened)
〈〈
〉〉
: AM (Monitor is opened)
(
) : Color Bar Signal Input (Monitor is opened)
[
] : FM (Monitor is closed)
∗
: Impossible to measure
– Other Boards –
• Voltages and waveforms are dc with respect to ground
• Voltages and waveforms are dc with respect to ground
under color bar signal input conditions.
no mark : Color Bar Signal Input (Monitor is opened)
no mark : Color Bar Signal Input (Monitor is opened)
• Voltages are taken with a VOM (Input impedance 10 M
Ω
).
Voltage variations may be noted due to normal produc-
tion tolerances.
tion tolerances.
• Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal produc-
tion tolerances.
tion tolerances.
• Circled numbers refer to waveforms.
• Signal path.
F
: FM
f
: AM
E
: AUDIO
L
: VIDEO
Caution:
Pattern face side:
Pattern face side:
Parts on the pattern face side seen from
(Conductor Side)
the pattern face are indicated.
Parts face side:
Parts on the parts face side seen from
(Component Side)
the parts face are indicated.
• Circuit Boards Location
main board
key board
FM board
monitor board
switch board
pulse board
angle board
motor board
front board
XAV-77
26
26
• Waveforms
– MAIN Board –
– MAIN Board –
1
IC703
ud
(X1A)
qs
IC900
<zzm
(HSYNC SEEP),
<zx/
(HSYNC MON)
qa
IC900
<zzn
(VSYNC SEEP),
<zz.
(VSYNC MON)
4.2 Vp-p
17 ms
4.4 Vp-p
18
µ
s
2.8 Vp-p
30.5
µ
s
5.5 Vp-p
279 ns
2
IC703
od
(X1)
0.8 Vp-p
3.9
µ
s
3
IC860
1
(CT)
13.4 Vp-p
3.7
µ
s
4
IC860
7
(OUT1)
13.4 Vp-p
3.7
µ
s
5
IC860
q;
(OUT2)
8.7 Vp-p
3.7
µ
s
8.7 Vp-p
3.7
µ
s
8
Q862 (2/2) (Gate)
15.2 Vp-p
3.7
µ
s
9
Q862 (2/2) (Drain)
6
Q862 (1/2) (Gate)
1.1 Vp-p
54 ns
q;
IC900
ig
(XTAL)
H
0.9 Vp-p
qf
Q198 (Base) (Color Bar Signal Input Mode)
15.2 Vp-p
3.7
µ
s
7
Q862 (1/2) (Drain)
H
0.9 Vp-p
qg
Q199 (Base) (Color Bar Signal Input Mode)
H
0.9 Vp-p
qh
Q200 (Base) (Color Bar Signal Input Mode)
2.6 Vp-p
25.8
µ
s
– FRONT Board –
wa
IC14
y;
(OSC)
0.9 Vp-p
H
qd
IC8
1
(VIN1) (Color Bar Signal Input Mode)
XAV-77
27
27
TP161
IC304
R159
C97
C119
D6
C117
IC13
R129
C100
C128
C127
R185
R149
TP155
TP156
C51
C77
R181
R182
R183
IC9
D752
C76
R165
R179
R180
C78
C254
C264
C265
TP158
TP159
R333
C348
C349
D313
TP160
R539
R348
R347
C350
C351
R343
R281
IC201
C101
R153
R264
R150
C334
R323
R247
R151
R154
R268
R265
R331
C346
R307
C344
Q301
D15
C335
D315
C361
C355
C362
D100
D101
D202
D203
D102
D103
D200
D201
R51
R336
C358
C365
R327
C360
R251
R156
R157
R253
TP169
TP168
TP170
TP171
R346
R342
TP166
C331
R242
C245
C233
R262
C52
C129
R148
C345
IC101
D314
C343
R344
TP167
TP141
TP143
TP144
TP145
TP146
TP147
TP148
TP149
TP150
TP140
TP139
Q13
R131
R332
C347
D311
R334
Q307
D310
R335
Q306
Q312
Q311
C356
R152
R155
R269
R266 C247
C239
C133
C131
R973
IC171
CN3
R144
R145
R223
R237
R349
Q310
R130
TP157
IC302
C130
C132
C238
C246
L308
R123
C96
R124
R125
R7
R126
C136
C232
CN6
R646
R128
C116
C118
CN20
C98
TU2
BA08SFP-E2
22k
0.1
100
6.3V
HZU5.6B-3
0.1
BA00ASFP-E
5.6k
0.1
12000p
0.22
10k
10k
0.47
0.47
15k
15k
10k
TC4066BFT
MA8056-M-T
0.47
15k
15k
10k
0.47
1
1
1
47k
4700p
0.47
MA111
47k
100
100
0.01
47
10V
100
10k
NJM4558V
1
100
100
100
4.7
35V
35V
100
100
47k
47k
47k
47k
6.8k
4700p
100k
0.022
UN2111-TX
MA152WK-TX
10
16V
MA111
0.47
47
16V
1
1SR154
1SR154
1SR154
1SR154
1SR154
1SR154
1SR154
1SR154
0
2.2k
10
16V
0.022
1k
0.1
100
100
100
100
47k
100
0.01
10k
1500p
12000p
10k
0.47
1500p
10k
0.047
NJM4558V
MA111
0.1
100
2SD1664-T1-QR
1k
0
1
MA111
2.2k
UN2211-TX
MA111
47
UN2111-TX
FMG12-T
-14
FMG12-T
-14
10
16V
0
0
0
0
0.47
0.47
0.47
0.47
47k
TA8268AH
9P
100
100
100
100
100
DTC314TK-T
0
TDA7406
4.7
35V
35V
4.7
35V
35V
4.7
35V
35V
4.7
35V
35V
100
0.1
0
0
100
100
18p
0.22
18P
1k
33k
47
10V
0.1
2P
0.047
TUX-020
+
B
T
E
L
-
A
T
T
T
U
O
N
P
-O
N
A
U
D
IO
1
0
V
R
E
S
E
T
L
IN
K
B
U
S
C
O
N
T
-B
U
S
SP OUT BUS
AUDIO BUS
A
U
-G
N
D
B
E
E
P
B
U
5
V
S
A
_
C
L
K
S
A
_
D
A
T
A
E
D
A
E
C
K
TU5.6V
TU8V
FL
RL
FR
RR
FL-
FR+
FR-
RL+
RL-
RR+
RR-
FL+
A
M
P
O
N
M
U
T
E
A
U
-R
S
C
L
S
D
A
ADSO2
ADSO1
RL
RR
S
C
L
S
D
A
FR
FL
T
U
5
.6
V
T
U
8
V
AU-L
METER
M
E
T
E
R
Z2
Z3
Z4
Z1
Z5
Z4
Z3
Z2
Z1
Z5
PD-
PAUSE
PHONE
TIM
NAVI
AM
AM_IF
CMPX
M
P
X1
LEV
EL
M
P
_IN
M
P
_O
U
T
Q
U
A
L
S_
M
U
T
E
D_G
N
D
SD
A
SC
L
SA
_C
LK
VD
D
OUT_SW
OUT_RR
OUT_RF
OUT_LR
OUT_LF
MIXIN_RF
MIXIN_RR
MIXIN_LR
MIXIN_LF
ACIN_L
SW_IN
A
CIN
_R
SW
_A
CO
U
T
C
RE
F
A
CO
U
T_R
AU-R
AU
-L
BUS-R
BUS-L
A
2-L
A2-R
A
1-R
A
1-L
AC
O
U
T_L
VDD
VSS
SA_DATA
FL
FR
RR
AU-GND
AU-GND
AU-GND
SUBOUT-L
SUBOUT-R
RL
GND
CTL
VCC
OUT
C
GND
CTL
VCC
OUT
C
IN1
IN2
IN3
IN4
S-GND
SVR
N.C.
TAB
OUT1+
P-GND1
OUT2-
OUT3+
P-GND3
OUT3-
OUT4+
P-GND4
OUT4-
P-GND2
OUT2+
VCC
VCC
ST-BY
MUTE
(CHASSIS)
LOW-PASS
FILTER
G
N
D
VC
C
LOW-PASS
FILTER
VCC
G
N
D
+5V REGULATOR
+8.5V REGULATOR
(1/5)
REGULATOR
+8V
MUTING
CONTROL
SWITCH
BATTERY OFF
MUTING DRIVER
MUTING
CONTROL
SWITCH
MUTING
-2
-1
MUTING
-2
-1
AUX
OUT1-
POWER AMP
MUTING
(L)
(R)
(L)
(R)
(L)
(R)
SUB WOOFER OUT
REAR AUDIO OUT
FRONT AUDIO OUT
CONTROL
SWITCH
ELECTRICAL
VOLUME
INPUT SELECT,
FM MPX,
ADSO
G
N
D
R
F
(ANTENNA IN)
(TUNER UNIT)
A
N
T
-AM
AN
T-
F
M
G
N
D
-R
F
G
N
D
AM
-D
ET
R
D
S
-D
ET
SW
S
H
IFT
V
C
C(8.5V
)
FM
-AG
C
M
PX
S-M
ET
ER
G
N
D
VD
D
E
2P(5V)
SD
A(I2C
BU
S)
SC
L(I2CBU
S)
VD
D
(5V
)
SD
A(E2PRO
M
)
SCL(E
2PR
O
M
)
IF-AM
N
O
C
18
1
6-6.
SCHEMATIC DIAGRAM – FM/MAIN (1/5) Boards –
•
See page 47 for IC Block Diagram.
(Page 29)
(Page 28)
(Page 29)
(Page 30)
(Page 29)
(Page 28)
(Page 29)
XAV-77
28
28
TP184
TP185
TP186
TP48
TP58
TP44
TP45
TP187
TP188
TP193
TP244
TP47
TP43
TP194
TP195
TP196
TP197
TP198
TP182
TP183
TP173
TP174
TP175
TP176
TP177
TP178
TP179
TP180
TP181
C555
C556
R703
C41
C714
R969
R163
IC4
X452
R773
R774
R173
R174
R759
C726
X701
C723
R758
R749
R748
R746
C725
C724
C710
C715
C22
C716
C722
R763
C728
CN14
Q2
C702
C706
R722
R723
R724
R700
R727
R721
R739
R971
R972
R162
R764
D701
TP206
Q4
R161
TP172
CN15
R762
R45
Q3
Q1
C30
R172
TP207
R728
R738
D703
R745
C31
C700
C727
R176
TP201
R5
F1
IC703
R23
R43
S1
R4
0.01
100
16V
16V
100k
0.1
0.1
47k
100k
TC7S08F
3.58MHz
100
100
100k
100k
680k
18p
32.768KHz
0.1
10k
10k
10k
100k
470p
220p
10
L700
22µH
0.01
1000p
1000p
1000p
100k
0.1
40P
DTC124EUA
0.01
0.01
100
100
100
220
100
100
100
100k
100k
100k
0
MA152WA-TX
2SJ327
10k
16P
100k
100k
DTC124EUA
2SJ327
0.01
10k
100k
100k
MA111
100k
100
16V
16V
0.01
18p
100k
0
1A
63V
MB90574CPMT-
G-392-BNDE1
100k
100k
0
B1
B2
B4
B5
B6
B7
B8
B9
B10
B11
B12
B13
B14
B15
B17
B18
B19
B20
B21
B22
B23
B24
LINK BUS
BEEP
VSYNC
HSYNC
NP_SEL
WIDE1
WIDE2
DIMMER
LCDPW
BRIGHT
R_OUT
G_OUT
VIDEO_OUT
B_OUT
V_MUTE
/V_MUTE
KEY-ACK
BUS ON
BU CHK
UNISI
UNICKO
UNISO
SYS RST
ACC-CHECK
A
M
P
O
N
S-SEL
REMSEL/GREEN
D
B
B
O
O
T
M
U
T
E
S
ID
EB
R
K
O
P
N
C
L
S
LODPLS
MCNT1
MCNT2
MDSW
CLSW
MCLOSE
MOPEN
ANGSW
R
E
M
S
E
L
/G
R
E
E
N
S
-S
E
L
S-IN
OPNCLS
R
G
B
/V
/S
E
L
K
E
Y
_
IL
L
KEY_ILL
SDA
SCL
A
D
S
O
1
A
D
S
O
2
A
D
K
E
Y
1
S-IN
VSYNC
HSYNC
NP_SEL
WIDE1
WIDE2
DIMMER
LCDPW
BRIGHT
LCDPW
BRIGHT
WIDE1
WIDE2
DIMMER
NP_SEL
HSYNC
VSYNC
A
D
K
E
Y
2
L
E
D
_
S
W
2
L
E
D
_
S
W
1
ADKEY2
ADKEY1
VIDEO_OUT
R_OUT
G_OUT
B_OUT
VIDEO_OUT
R_OUT
G_OUT
B_OUT
S-IN
S-OUT
M
E
T
E
R
S
A
_
E
N
IN
L
O
D
P
L
S
M
O
P
E
N
M
C
L
O
S
E
A
N
G
S
W
M
D
S
W
CL
S
W
M
C
N
T
1
M
C
N
T
2
ECK
EDA
COBOX
SYS+B
SYS+B
SYS+B
NC
GND
GND
GND
MOPEN
MCLOSE
MCNT2
MCNT1
LODPLS
SYSPW
ANGSW
CLSW
MDSW
SYS+B
SYS+B
SYS+B
NC
GND
GND
VIDEO
GND
R
GND
G
GND
B
LCDPW
BRIGHT
WIDE1
WIDE2
TV
GND
LEFT
RIGHT
GND
HSYNC
VSYNC
VOLCLK
VOLDATA
AMUTE
BEEP
SYS5V
DIMMER
SIRCS
SIRCS SEL
VOLRST
OPEN/CLOSE
NP_SEL
KEY1
KEY2
V
SS
X0
X1
VCC
VCC
BEEP
VSS
DVC
C
DVSS
A
VCC
AV
R
H
A
VRL
VCC
VSS
X1A
X0A
C
A
VSS
QU
ALITY
SIRCS
ATT
TROM-SDA
TROM-SCL
NAVI-ATT
UNISI
UNISO
UNICLK
SHIFT
KEYIN
0
KEYIN1
RC-IN0
S-ME
TER
NS-M
ASK
DDC
-ON
SIDEBRK
OPNCLS
PWM
FLASH-W
I2C-SDA
I2C-SCL
RC_IN1
P-ON
TEST-IN
MD2
MD1
MD0
M
OPEN
MCLOSE
M
CN
T1
M
CNT2
DESTSEL1
REM
SEL
M
NTOPN
TUNER-ON
LODP
LS
DESTSEL2
KEY
IN2
ADSO1
ADSO2
KEY_ILL
NC
NC
SIRCS BUFFER
G
V
MASTER CONTROLLER
NCO
NCO
NCO
SYSRST
NCO
NCO
RX
TX
BUS-ON
MVOL RST
MVOL DAT
MVOL CLK
NCO
NCO
NCO
NCO
NCO
NCO
NCO
E-VOL-A
TT
NCO
N
CO
NCO
NCO
ST
-BY
RGB S
EL
KEY ILL
AMUTE
NCO
NCO
NCO
NCO
DAVN
NCO
BU IN
NCO
KEY ACK
AD-ON
ACCIN
BACK SEN
RAM-BU
HSTX
RSTX
ILL-IN
MDSW
CLSW
ANGSW
BO
OT
SA ENIN
NCO
NCO
NCO
ILL ON
LED SW
1
LED SW
2
TELL A
T
T
B+ SWITCH
Q1,2
Q3,4
S1
(FREQUENCY SELECT)
FM 50kHz
AM 9kHz
FM 200kHz
AM 10kHz
S
S
(2/5)
COBOX
ST
MPTH
-2
-1
B+ SWITCH
SYSTEM
SYSTEM
V.
M
UTE
V.
M
UTE
VSS
6-7.
SCHEMATIC DIAGRAM – MAIN Board (2/5) –
•
See page 26 for Waveforms.
(Page 31)
(Page 38)
(Page 31)
(Page 30)
(Page 27)
(Page 27)
(Page 45)
(Page 29)
Click on the first or last page to see other XAV-77 service manuals if exist.