Sony AC-LF1HR / DAV-LF1H Service Manual ▷ View online
8
AC-LF1HR
2
Remove the top cover and
power sheet (upper)
in the direction of the arrow
power sheet (upper)
in the direction of the arrow
C
.
3
top cover,
power sheet (upper)
power sheet (upper)
4
top cabinet
1
Stretch the top cabinet in the direction
of the arrows
of the arrows
A
and
B
.
B
A
top cabinet
C
5
two saranet cushions
6
harnesses
top cover
3-5. TOP CABINET
9
9
AC-LF1HR
AC-LF1HR
SECTION 4
DIAGRAMS
Note on Schematic Diagrams:
• All capacitors are in
• All capacitors are in
µ
F unless otherwise noted. (p: pF)
50 WV or less are not indicated except for electrolytics and
tantalums.
tantalums.
• All resistors are in
Ω
and
1
/
4
W or less unless otherwise
specified.
•
C
: panel designation.
Note on Printed Wiring Boards:
•
•
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.)
• Indication of transistor.
• Note for Printed Wiring Boards and Schematic Diagrams
Caution:
Pattern face side:
Pattern face side:
Parts on the pattern face side seen from
(Side B)
the pattern face are indicated.
Parts face side:
Parts on the parts face side seen from
(Side A)
the parts face are indicated.
Note:
The components identified by
mark
mark
0
or dotted line with
mark
0
are critical for safety.
Replace only with part num-
ber specified.
ber specified.
Note:
Les composants identifiés par
une marque
une marque
0
sont critiques
pour la sécurité.
Ne les remplacer que par une
piéce portant le numéro spécifié.
Ne les remplacer que par une
piéce portant le numéro spécifié.
•
IC Block Diagrams
– DIAT POWER Board –
D 1
NC 2
S/GND 3
VCC 4
OLP/SS 5
FB 6
OCP/BD 7
DELAY
Q
R
S
+
–
+
–
+
–
Q
S
R
+
–
BOTTOM
SELECTOR
COUNTER
OSC
R
Q
S
SOFT START
+
–
OVP
REGULATOR
& ICONST
+
–
BURST
CONTROL
START/STOP
BURST
PROTECTION
LATCH
DRIVE
REGULATOR
OLP
BSD
BD
OCP
FB
IC901 STR-W6735N (US, CND, MX, TW)
STR-W6765N (EXCEPT US, CND, MX, TW)
C
B
These are omitted.
E
Q
Ver. 1.2
•
A
: B+ Line.
• Voltages are dc with respect to ground
under no-signal (detuned) conditions.
• Voltages are taken with a VOM (Input impedance 10 M
Ω
).
Voltage variations may be noted due to normal production toler-
ances.
ances.
• Signal path.
F
: AUDIO
• Abbreviation
CND
: Canadian model
MX
: Mexican model
TW
: Taiwan model
10
10
AC-LF1HR
AC-LF1HR
• Signal Path
: AUDIO
T901
PC902
D911
D901
F901
S901
LF901
AC
IN
D921
R946
D900
J902
AC-CUT
SA-TSLF1H
TH901
Q901
REG
PC901
PC903
IC905
+2.5V REG
D910
Q902
SWITCH
Q903
SWITCH
6 FB
3 S/GND
4 VCC
1 D
7 DCP/BD
5 OLP/SS
TH902
IC903
+7.8V REG
V-CONT
MAIN-OFF
IC901
SWITCHING REG
R945
POWER
POWER
4
5
6
7
1
8
9
2
3
10
J901
DIR-R3
Q906
SWITCH
LF902
JW922
EXCEPT US, CND, MX, TW
US, CND, MX, TW
JW921
4-1. BLOCK DIAGRAM
Ver. 1.1
11
11
AC-LF1HR
AC-LF1HR
4-2. PRINTED WIRING BOARD
:Uses unleaded solder.
IC903
IC905
IC901
PC901 PC903 PC902
EXCEPT
US, CND,
MX, TW
US, CND,
MX, TW
EXCEPT
US, CND,
MX, TW
US, CND,
MX, TW
EXCEPT
US, CND,
MX, TW
US, CND,
MX, TW
EXCEPT
US, CND,
MX, TW
US, CND,
MX, TW
EXCEPT
US, CND,
MX, TW
US, CND,
MX, TW
T901
CONVERTER
TRANSFORMER
US,CND, MX, TW
US,CND, MX, TW
(CHASSIS)
(CHASSIS)
DIR-R3
1
1
1
2
2
2
1
3
5
7
E
E
E
4
6
A
K
A
E
3
2
1
1
1
1
2
2
1
2
3
5
2
3
4
2
9
3
4
10
SA-TSLF1H
AC IN
POWER
POWER
YELLOW
BROWN
C906
TH901
D901
C905
JW922
LF902
JW901
C904
R922
LF901
VDR901
C901
C902
C903
EB901
R902
F901
FH902
FH901
CN903
JW921
D911
R917
R905
D914
Q903
C917
Q902
C916
D913
R920
D916
D909
D917
C914
C911
D905
Q901
R927
C909
D906
D908
C913
JW903
R910
R913
D907
R914
R921
R928
D918
C910
R912
JW908
D910
R911
C912
R908
TH902
C908
JW906
R915
JW907
D902
R906
C918
C907
FR901
C920
R935
R948
C934
R933
R934
R936
R939
R931
R932
R938
C932
R945
C935
C936
C933
JW910
R946
C925
C942
C940
JW911
JW905
JW913
R937
L901
R940
R923
J902
J901
Q906
D921
JW909
C944
JW912
EB902
CNP907
C931
D904
C915
R919
JW904
CN901
S901
CNP902
CN905
D900
1
A
B
C
D
E
F
G
H
I
2
3
4
5
6
7
8
9
10
11
12
13
• Semiconductor
Location
Ref. No.
Location
D900
H-2
D901
E-5
D902
F-5
D904
F-7
D905
E-7
D906
E-6
D907
E-7
D908
E-6
D909
E-7
D910
F-6
D911
D-6
D913
D-7
D914
D-6
D916
D-6
D916
E-6
D917
E-6
D918
E-6
D921
H-5
IC901
F-5
IC903
H-6
IC905
G-5
PC901
F-6
PC902
F-6
PC903
F-7
Q901
E-7
Q902
D-6
Q903
D-6
Q906
H-5
Ver. 1.1
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