Sony XR-C550 / XR-C550W Service Manual ▷ View online
– 40 –
• IC Block Diagrams
IC91 BU2624FV-E2
IC201 LB1638M
IC231 CXA2510AQ
PHASE
DET
PRESCALER
MAIN
COUNT
IF COUNT
CTL
20BIT COUNT
SHIFT REGISTER LATCH
REFERENCE
DIVIDER
I/O
CTL
1
2
4
5
6
7
9
10
20
18
17
16
15
14
13
12
11
11
19
XIN
CE
CK
DA
CD
P0
P1
P3
XOUT
VSS
PD
VDD
FMIN
AMIN
P2
IFIN
SD
P4
P4
CONTROL LOGIC
1
2
3
4
5
10
9
8
7
6
N. C.
OUT1
VS
OUT2
N. C.
GND
IN1
VCC
IN2
GND
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
15
14
13
12
11
32
33
34
35
36
37
38
39
40
NR
NR
NR BIAS
TAPE/AUX
TAPE EQ
FWD/RVS
MS MODE
NR MODE
DET
10
9
8
7
6
5
4
3
2
1
LPF
VCT
+ -
T2
X1
X1
T1
+ -
F3
VCC
OFF/B
OFF/B
+
-
F1
F2
+
-
120
µ
/70
µ
120
µ
/70
µ
MS ON/
OFF
PBFB2
PBRIN2
PBREF2
PBFIN2
VCT
PBGND
PBFIN1
PBREF1
PBRIN1
PBFB1
PBEQ1
PBOUT1
VCC
TAPEIN1
AUXIN1
MSLPF
LINEOUT1
TCH1
NC
G2FB
PBEQ2
PBOUT2
GND
TAPEIN2
AUXIN2
DIREF
LINEOUT2
TCH2
NC
MSSW
MSMODE
DRSW
TAPESW
INSW
NRSW
NC
MSOUT
DGND
MSTC
G1FB
+
-
– 41 –
IC301 CXA1946BQ-T6
36
35
34 33
31
30
25
26
27
28
29
32
1
2
3
4
5
6
7 8 9 10 11
12
13
14
15
16
17
18
19
20
21
22
23
24
37
38
39
40
41
42
43
44
45
46
47
48
GAIN12
GAIN11
IN11
IN12
IN13
IN14
IN21
IN22
IN23
IN22
IN23
IN24
GAIN21
GAIN22
FNTO1
REO1
REO1
CE
CLK
CLK
DGND
GND
VCC
VCT
DATA
TIMER
REO2
FNTO2
GAIN13
4
LDLC1
LDHC1
INAO1
VRIN1
VOUT1
TIN1
TCLC1
TCLC11
TCLC12
TCO1
FDIN1
GAIN234
LDLC2
LDHC2
INAO2
VRIN2
VOUT2
TIN2
TCHC2
TCLC21
TCLC22
TCO2
FDIN2
LOUD
VOLUME
8dB STEP
VOLUME
1dB STEP
VCTBUFF
VCTBUFF
VCTBUFF
TONE
FADER
INPUT SW
LATCH
LATCH
CONTROL
ZCDET
SHIFT
REGISTER
45k
45k
VCTBUFF
VCTBUFF
VCTBUFF
VOLUME
1dB STEP
LOUD
INPUT SW
TONE
FADER
VOLUME
8dB STEP
– 42 –
IC571 BA8270F
IC601 BA3918-V3
BUS ON
SWITCH
RESET
SWITCH
BATTERY
SWITCH
3
4
5
6
2
1
10
9
8
7
11
12
13
14
BUS ON
RST
BATT
CLK
VREF
DATA
GND
VCC
RST
BUS ON
BUS ON
CLK IN
BU IN
DATA IN
DATA OUT
1
2
3
4
5
6
7
8
9
10
11
12
GND
FM 8.7V
AM 8.7V
COM 8.7V
ANT
VCC
AMP
VDD 5.6V
STB
MODE 1
MODE 2
N.C.
REGULATOR
EXCESSIVE
VOLTAGE
PROTECTOR
VCC
VCC
VCC
VCC
VCC
VCC
– 43 –
SECTION 7
EXPLODED VIEWS
N
N
NOTE:
• The mechanical parts with no reference
number in the exploded views are not supplied.
• Items marked “*” are not stocked since
they are seldom required for routine service.
Some delay should be anticipated
when ordering these items.
Some delay should be anticipated
when ordering these items.
• -XX and -X mean standardized parts, so
they may have some difference from the
original one.
original one.
• Color Indication of Appearance Parts
Example :
KNOB, BALANCE (WHITE) ... (RED)
Parts Color Cabinet’s Color
• Hardware (# mark) list and accessories
and packing materials are given in the
last of this parts list.
last of this parts list.
7-1. CHASSIS SECTION
1
4
5
7
6
13
10
9
12
20
21
14
17
18
15
3
2
8
15
16
22
11
#3
#3
#1
#3
#3
#1
#1
#2
#4
#4
#4
#4
#4
#4
MG-52B-135
F901
TU11
19
#4
A
A
Ref. No.
Part No.
Description
Remark
Ref. No.
Part No.
Description
Remark
* 1
X-3373-362-1 COVER ASSY
2
1-776-207-11 CORD (WITH CONNECTOR) (POWER)
3
3-919-171-01 SCREW (2.6X6) (C TIGHT)
4
X-3373-376-1 BRACKET (GEAR) ASSY
5
3-011-170-01 GEAR (HOLDER)
6
3-341-752-11 WASHER, POLYETHYLENE
7
3-953-235-31 DAMPER, OIL
8
3-913-076-01 SPRING (C DOOR), TORSION
9
3-010-993-11 PLATE (C DOOR), LIGHT GUIDE
10
3-010-996-01 BUTTON (EJECT)
* 11
1-665-379-11 SUB BOARD
12
X-3373-374-1 LOCK ASSY
13
X-3373-541-1 PANEL ASSY, SUB
* 14
3-355-209-01 PLATE (B), GROUND
15
3-915-923-01 SCREW, GROUND POINT
* 16
A-3309-984-A MAIN BOARD, COMPLETE (E)
* 16
A-3309-986-A MAIN BOARD, COMPLETE (US,Canadian)
* 17
3-011-078-01 BRACKET (POWER IC)
* 18
3-001-090-01 BRACKET (AMP)
* 19
3-001-077-01 HEAT SINK (E)
* 19
3-001-077-11 HEAT SINK (US,Canadian)
* 20
3-012-196-01 INSULATOR
* 21
X-3373-384-1 CHASSIS ASSY
22
3-922-165-91 DOOR, CASSETTE
F901
1-532-877-11 FUSE (BLADE TYPE) (AUTO FUSE) 10A
TU11
A-3282-019-A TUNER UNIT (TUX-008 (EA)) (E)
TU11
A-3282-029-A TUNER UNIT (TUX-006/2 (E)) (US,Canadian)
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