Read Sony HCD-G2500 / HCD-XB20 / HCD-XB22 / LBT-G2500 / LBT-XB20 / LBT-XB22 Service Manual online
HCD-G2500/XB20/XB22
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— 18 —
5-2. BLOCK DIAGRAM — DECK SECTION —
HP901
PB
HEAD
TAPE B
HRP901
REC/PB
REC/PB
HEAD
TAPE A
R CH
R CH
R CH
PLAY/REC
CONTROL
CONTROL
Q803,805
PLAY/REC
CONTROL
CONTROL
DRIVE
Q823
PLAY/REC
CONTROL
CONTROL
D802
L809
BIAS OSC
BIAS
OSC
OSC
HE901
ERASE
HEAD
5
7
6
PB OUT
A/B
2
3
EQ AMP
IC801
Q816,817
D803
: FM
: CD
• Signal Path
• RCH is omitted
B
CD
SECTION
TU L
11
9
10
ST IND
TU MUTE
DO
CD L
12
CONTROL
3
2
1
CLK
14
DI
15
CE
16
SELECTOR
IC301
CLK
DI
CE
LINE AMP
IC303
1
3
Q709
MUTE
3
11
4
POWER AMP
IC701
SP
RELAY
DRIVE
Q706
Q708
1
2
6
IC702
RL701
R CH
SPEAKER
PHONES
JK703
JK401
SCOR
SENS
SQSO
XLAT
SQCK
DATA
DI
CLK
CE
STB
91
STB
93
CE
97
CLK
98
SO
95
D
ATA
97
SQCK
34
XLA
T
96
SQSO
75
SENS
27
SCOR
89
SI
MUTE
DRIVE
Q410
Q604
MUTE
MUTE
SWITCH
Q603
3
TU MUTE
73
FM ST
IND
2
SYSTEM MUTE
1
POWER
98
ALA
TCH
DI
CLK
RESET
SWITCH
POWER
DOWN DET
Q601
12
RESET
13
POWER DOWN
Q602
LED601-609
Q602
D602
X2
17
X1
12
VR UP
81
X601
6MHz
VR DOWN
82
VR601
VOLUME
A
B
S641
DOOR
3
2
Q601
RM601
REMOTE
CONTROL
RECEIVER
29
REMOTE
47
50
KEY
MATRIX
S601-624
P1
P21
30
44
G1
G15
. 52
67
22
19
K1
K4
FLD601
FLD DISPLAY
SYSTEM CONTROLLER/
FLD DRIVER
IC601
+5.6V
REG
Q409
SITCHING
Q405,406
M +12V
+12V
FILTER
Q403
+7.5V
REG
Q702
CD +7.5V
+12V
REG
REG
Q701
RECT
D705-708
P MUTE
CONT
Q712
AC OFF
DET
Q711
D719
D714
RECT
D701
-12V
-30V
+30V
-27V
REG
Q703
-27V
VOLTAGE
DOUBLER
D731,732
AC
IN
PT301
AC3.4V
AC3.4V
16
16
A
TUNER
SECTION
: PB (DECK A)
: PB (DECK B)
: REC (DECK A)
Q801
BIAS
SWITCH
Q818
+12V
REC
MUTE
Q807
PHONO
JK301
10
FUNCTION T
APE
74
CD SYNC
MECHANISM
BLOCK
CE
CLK
DO
LED DRIVE
IC602
2
3
4
Q605,606
SW
MODE
68
+5.6V
SW101
10k
9k
CD ENCODER
A
83
CD ENCODER B
84
VR602
CD
A
B
4
L
T
COM
SURROUND
CONTROL
Q307
Q310
4
3
2
Q305
HIGH
HIGH
Q308
NORMAL
5
DBFB NORMAL
6
DBFB HIGH
HP AMP
IC401
Q407
MUTE
SP
DET
Q404
+12V
-12V
REG
Q401
: PHONO
76
FOK
28
COUNT
COUNT
FOK
R
L
IC402
R CH
BIAS
TRAP
L805
SFR807
MUTE
CONT
Q809
9
SFR807
SFR801
SFR803
14
10
13
11
12
15
1
MUTE
MUTE
REC AMP
PB/REC
AMP
IC802
MPX
Q803
Q811
BUFFER
D804
D801
D806
D805
D807
Q813
MUTE
MUTE
CONT
REC +B
B PLAY +B
A MOTOR +B
Q825,826
Q819
16
14
DOLBY
AMP
IC803
12
9
11
5
D808
D810
SFR805
6
8
9
IC803
IC302
Q301
Q822
PB
MUTE
Q815
MUTE
Q820
D809
Q303
8
ROCK
Q311
MUTE
D303
S804
S803
S802
S801
S804
SW201
REC +B
A MOTOR +B
B PLAY +B
MOTOR +12V
M
TAPE
SPEED
SFR809
16
26
SP
ANA
3
1
SPANA
IC603
5
14
8
25
SP
ANA
2
78
T
ABLE SENSOR
24
SP
ANA
1
8
FLA
T
7
SURROUND
D302
+12V
77
UP
SW
UP SW
TABLE SENSOR
ENCODER
K 0
23
S601-624
S626-640
S626-640
45 .
SW401
E, SP, MY, AR MODEL
F702
F703
POWER
MUTE
Q402
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