Sony STR-DB798 Service Manual ▷ View online
STR-DB798
49
49
STR-DB798
JW907
CN906
CN912
CN911
C908
C923
C924
C925
C926
C909
R904
R902
CN909
JW901
CN910
R910
R912
R911
C902
C903
Q903
EB901
C907
CN902
S901
CN901
C919
R913
CN913
C918
C917
C915
C916
D914
D904
D905
D903
D906
D908
F903
F904
D909
D910
C906
C904
D902
JW905
JW904
JW902
JW903
C920
D912
D913
D915
D916
CN907
6P
6P
3P
1000
16V
220
25V
25V
220
25V
25V
220
25V
25V
220
25V
25V
330
50V
50V
10k
22k
5P
3P
2.2
1
1W
1
1W
2200
35V
1000
35V
2SB1241
4700
16V
3P
5P
0.1
200V
150
2P
0.015
100V
0.015
100V
8200
63V
8200
63V
D6SBN20
D1NL20U
D1NL20U
D1NL20U
D1NL20U
D4SBN20
T4AL
250V
250V
T4AL
250V
250V
10EDB40
47
35V
100
25V
25V
HZS20-1LTA
0.1
10EDB40
10EDB40
10EDB40
10EDB40
10P
O-B
O-A
GND
GND
+24V
-24V
GND
P.RY
STOP
8V
SUB,T
GND
8V
(CHASSIS)
+B
-B
B GND
+15V
-15V
GND(D)
-28V(FL)
+24V(RY)
GND(RY)
STOP
SUB,T
-18V REGULATOR
PW-RY
GND
IMPEDANCE
SELECTOR
4
Ω
8
Ω
-1
-2
LO-A
LO-B
2
3
1
4
1
2
4
3
HI-A
HI-B
+8V(D)
+8V(V)
-8V(V)
+8V
-8V
+8V(DAB)
+8V STBY
(AEP,TW)
6-36. SCHEMATIC DIAGRAM – DC Section –
(Page 39)
(Page 38)
(Page 37)
(Page 25)
(Page 37)
(Page 51)
(Page 51)
(Page 51)
(Page 51)
STR-DB798
50
50
STR-DB798
JW58
JW5
JW6
JW51
F1
R2
JW53
JW52
JW54
JW55
JW57
Q51
CN51
C53
C52
C55
R57
R56
R54
R53
R52
D58
D55
D54
D57
D53
D52
D51
Q52
Q53
R51
R55
C51
CN1
D56
EB51
EB1
R58
C56
C54
J50
Q54
AC BOARD
1-867-427-
11
(11)
~ AC IN
(CHASSIS)
(CHASSIS)
E
E
E
E
40
DC PWR BOARD
CN912
41
4-8 OHM
BOARD
CN901
38
DC PWR
BOARD
CN906
1
2
T2
SUB POWER
TRANSFORMER
T901
MAIN POWER
TRANSFORMER
A
B
C
D
E
F
1
2
3
4
5
6
7
8
9
39
DC PWR
BOARD
CN906
17
MAIN
BOARD
CN418
(AEP, TW)
6-37. PRINTED WIRING BOARD – AC BOARD –
(Page 48)
•
See page 19 for Circuit Boards Location.
: Uses unleaded solder.
D51
E-5
D52
D-7
D53
E-7
D54
E-7
D55
E-7
D56
E-7
D57
E-7
D58
E-7
Q51
F-5
Q52
F-4
Q53
F-4
Q54
F-7
Ref. No. Location
•
Semiconductor
Location
Location
(Page 48)
(Page 48)
(Page 48)
(Page 36)
STR-DB798
51
51
STR-DB798
D51
R51
R52
R53
C53
C52
D53
D54
D55
D56
D57
C56
R57
Q52
CN51
F1
C55
R55
R56
R54
T2
EB51
RY1
Q54
T901
C51
R58
D52
D58
R2
Q51
R61
Q53
JW53
C54
J50
~AC IN
1SS133T
2.2k
10k
680
0.056
0.0047
1SS133
11EQS04
11EQS04
11EQS04
11EQS04
470p
10k
2SA1015
6P
CN1
2P
1
50V
33k
10k
47k
2SC2785
2200
16V
100
1SS133
10EDB40
1
2SC1740TP
33k
DTC124ESATP
2200
16V
∗
N
L
(CHASSIS)
P.RY
GND
STOP
8V
SUB,T
8V
GND
AC 6V
AC 6V
GND
+8V
-8V
GND
LO-B
HI-B
LO-A
HI-A
GND
+24V
-24V
MAIN POWER
TRANSFORMER
TRANSFORMER
SUB POWER
DRIVE
RELAY
AC POWER
DETECT
B+ SWITCH
∗
T4AL 250V
F1
(TW)
Q52,53
10A 125V
(AEP,UK)
(AEP,TW)
6-38. SCHEMATIC DIAGRAM – AC BOARD –
(Page 49)
(Page 49)
(Page 39)
(Page 49)
(Page 49)
STR-DB798
52
52
STR-DB798
•
Waveforms
– DIGITAL Board –
1
IC1101
qd
(CKOUT)
1 V/DIV, 50 ns/DIV
2
IC1101
qf
(BCK)
1 V/DIV, 100 ns/DIV
3
IC1101
qg
(LRCK)
1 V/DIV, 10
µ
s/DIV
4
IC1101
w;
(XMCK)
1 V/DIV, 20 ns/DIV
7
IC1201
qg
(LRCKI1),
wk
(LRCKI2)
1 V/DIV, 10
µ
s/DIV
8
IC1201
qj
(BCKI1),
wl
(BCKI2)
1 V/DIV, 100 ns/DIV
9
IC1201
ql
(LRCKO)
1 V/DIV, 10
µ
s/DIV
q;
IC1201
w;
(BCKO)
1 V/DIV, 100 ns/DIV
qa
IC1201
ws
(KFSIO)
1 V/DIV, 20 ns/DIV
5
IC1101
wa
(XOUT)
1 V/DIV, 20 ns/DIV
qs
IC1401
qd
(LRCK)
1 V/DIV, 10
µ
s/DIV
qd
IC1401
qf
(BCK)
1 V/DIV, 100 ns/DIV
qf
IC1401
qh
(SYSCLK)
1 V/DIV, 20 ns/DIV
qg
IC1501
ek
(SCKI)
1 V/DIV, 20 ns/DIV
qh
IC1501
r;
(BCK)
2 V/DIV, 100 ns/DIV
qk
IC1703
tj
(X1)
1 V/DIV, 20 ns/DIV
6
IC1201
qs
(MCLK2)
1 V/DIV, 20 ns/DIV
qj
IC1501
ra
(LRCK)
1 V/DIV, 10
µ
s/DIV
ea
IC371
4
(X’TAL) (VIDEO 1
mode) (AEP, UK)
50 mV/DIV, 100 ns/DIV
ea
IC371
4
(X’TAL)
(VIDEO 1 mode) (TW)
50 mV/DIV, 100 ns/DIV
81 ns
4.2 Vp-p
81 ns
4.4 Vp-p
326 ns
4.0 Vp-p
326 ns
5.5 Vp-p
326 ns
5.4 Vp-p
326 ns
6.5 Vp-p
326 ns
4.6 Vp-p
20.8
µ
s
3.4 Vp-p
20.8
µ
s
3.6 Vp-p
20.8
µ
s
3.6 Vp-p
20.8
µ
s
3.6 Vp-p
20.8
µ
s
3.6 Vp-p
81 ns
4.6 Vp-p
72 ns
4.0 Vp-p
60.5 ns
3.8 Vp-p
81 ns
5.1 Vp-p
81 ns
4.9 Vp-p
5.3 Vp-p
81 ns
226 ns
120 mVp-p
279 ns
120 mVp-p
– COMP-V Board –
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