Sony HCD-LX10AV / HCD-LX90AV / HCD-LX9AV / LBT-LX10AV / LBT-LX90AV / LBT-LX9AV Service Manual ▷ View online
29
29
HCD-LX9AV/LX10AV/LX90AV
7-8.
SCHEMATIC DIAGRAM – AUDIO Board –
•
See page 50 for IC Block Diagrams.
• Voltages are dc with respect to ground under no-signal
conditions.
no mark : TAPE PLAY
(
no mark : TAPE PLAY
(
) : RECORD
PB LEVEL (L)
(DECK A)
PB LEVEL (R)
(DECK A)
PB LEVEL (L)
(DECK B)
PB LEVEL (R)
(DECK B)
PB EQ AMP
(DECK A)
PB EQ AMP
(DECK B)
SWITCHING
REC BIAS (L)
(DECK B)
REC BIAS (R)
(DECK B)
BIAS OSC
REC BIAS
-6.8
(PLAYBACK)
E
NC
A +7.5V
APB–LCH
APB–RCH
AGND
BPB–LCH
BPB–RCH
A –7.5V
–VBIAS (–7.5V)
+VBIAS (+7.5V)
B–REC–RCH
B–REC–LCH
TC–HEAD–GND
16
(Page 33)
The components identified by mark
0
or dotted
line with mark
0
are critical for safety.
Replace only with part number specified.
30
30
HCD-LX9AV/LX10AV/LX90AV
7-9.
PRINTED WIRING BOARD – LEAF SW Board –
•
See page 20 for Circuit Boards Location.
16
DECK A
PLUNGER
DECK B
PLUNGER
(DECK A PLAY)
(DECK A HALF)
(DECK A 120/70)
(DECK A REC)
(DECK B HALF)
(DECK B PLAY)
(DECK B 120/70)
(DECK B REC)
12
12
F
4
1
2
3
4
1
2
3
(
)
7-10.
SCHEMATIC DIAGRAM – LEAF SW Board –
DECK B
PLUNGER
DECK A
PLUNGER
(CAPSTAN)
(DECK A 120/70)
(DECK A HALF)
(DECK A REC)
(DECK B HALF)
(DECK B REC)
(DECK B 120/70)
ROTATION DETECT SENSOR
(DECK A)
ROTATION DETECT
SENSOR (DECK B)
(DECK A PLAY)
(DECK B PLAY)
F
CONTROL SWITCH
CAPM–
CAPM+
CAPM–H/L
A–TRGM
TRGM–GND
B–TRGM
A–SHUT
DGND
A–HALF
+5V
A–120/70
B–SHUT
A PLAY
B–HALF / REC–A / REC–B
B–120/70
B PALY
NC
16
• Voltages are dc with respect to ground under no-signal
conditions.
no mark : TAPE PLAY
(
no mark : TAPE PLAY
(
) : RECORD
∗
: Impossible to measure
(Page 31)
(Page 33)
31
31
HCD-LX9AV/LX10AV/LX90AV
7-11.
PRINTED WIRING BOARD – MAIN Board –
•
See page 20 for Circuit Boards Location.
R504
R525
R524
R523
R733
Q731
C731
E
WOOFER
OUT
J704
C776
C733
R731
R732
C732
R734
FRONT
IN
REAR
IN
CENTER
IN
WOOFER
IN
J703
R723
C723
C761
C762
C763
C712
C713
C711 R712
R71
1
R763
R713
C775
R761
R762
R714
R764
R765
R766
R715
R716
C251
C253
L201
C250
C246
C244
C245
C243
C247
C249
C239
C238
C235
C229
C227
C226
C223
C221
C219
C218
C220
C222
C224
C225
C228
C233
C231
C230
C236
C237
C242
C232
C234
C248
R210
R21
1
R207
R208
R212
C241
C240
C255
C256
C257
C259
C258
C260
C201
C203
R213
R214
C202
C213
R201
R203
R202
C266
C207
C252
R204
R205
R206
R209
C261
C204
C209
C208
C211
C212
C210
D201
R291
Q291
R293
R292
E
E
E
R281
R282
R271
Q271
Q281
R272
R273
R283
N201
1
5
C216
C217
C215
C214
C246
FL201
24
25
40
41
64
65
80
1
IC201
(Page 44)
(Page 44)
(Page 26)
(Page 24)
(Page 46)
(Page 36)
(Page 30)
(Page 28)
(Page 38)
(Page 42)
• Semiconductor
Location
Ref. No.
Location
D191
B-7
D192
B-7
D193
A-6
D194
B-6
D201
E-7
D334
I-3
D501
I-6
D534
G-7
D801
I-6
D802
H-7
D803
H-8
D804
I-7
D805
H-8
D806
H-7
D807
H-8
D808
I-6
D911
E-10
D912
F-9
D913
F-10
D931
G-10
D951
B-10
IC101
D-3
IC181
B-5
IC191
B-7
IC201
C-9
IC301
G-2
IC501
H-6
IC601
B-1
IC781
A-12
IC801
I-7
IC901
C-11
IC911
E-10
IC931
G-10
IC932
G-11
IC932
G-12
IC933
H-11
IC951
B-11
Q111
D-5
Q112
D-5
Q113
D-5
Q115
D-4
Q161
E-5
Q162
E-5
Q163
E-5
Q165
E-3
Q331
I-2
Q332
I-2
Q333
I-2
Q334
I-2
Q336
I-3
Q339
I-4
Q342
I-3
Q801
H-7
Q802
H-9
Q803
H-8
Q804
I-8
Q901
C-11
Q902
B-11
Q903
B-11
Q904
B-11
Q905
B-11
Q906
B-11
Q911
F-9
Q912
F-9
Q913
F-9
Q914
F-9
Q931
G-10
Q932
G-9
Q961
A-10
Q962
A-10
32
32
HCD-LX9AV/LX10AV/LX90AV
7-12.
SCHEMATIC DIAGRAM – MAIN Board (1/3) –
• Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
no mark : TUNER (FM/AM)
no mark : TUNER (FM/AM)
(Page 43)
(Page 34)
(Page 33)
(Page 33)
(Page 33)
(Page 34)
(Page 47)
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