Sony HCD-BX20I - Compact Disc Receiver Component, Руководство по обслуживанию

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HCD-BX20i/BX50BTi
HCD-BX20i/BX50BTi
42 42
• Waveforms
- PANEL Board -
- MAIN Board -
- IP Board - - CD Board -
FB
IC101
JB
(RFi)
(CD play mode)
200 mV/DIV, 500 ns/DIV
0.5 to 1.3 Vp-p
FT
IC101
XG
(XO)
(CD play mode)
1 V/DIV, 20 ns/DIV
59.1 ns
50 ns
3.3 Vp-p
XB
IC101 (XOUT)
1 V/DIV, 20 ns/DIV
1.7 Vp-p
RT
Q903 (Collector)
RB
IC902
U
(OSCI)
1 V/DIV, 1
μ
s/DIV
1.3
M
s
1.7 Vp-p
20 V/DIV, 5
μ
s/DIV
11.2
M
s
32 Vp-p
2 V/DIV, 5
μ
s/DIV
11.2
M
s
3.2 Vp-p
RE
Q903 (Base)
IC301
RE
(XOUT)
1 V/DIV, 100 ns/DIV
1 V/DIV, 100 ns/DIV
IC301
RB
(XCOUT)
30.6
M
s
2.8 Vp-p
200 ns
3.1 Vp-p
• IC Block Diagrams
– CD Board –
IC201 TK63115SCL-G@GT
THERMAL &
OVER CURRENT
PROTECTION
VOLTAGE
REFERENCE
ON/OFF
CONTROL
VIN 1
GND 2
VCONT 3 NC 4
VOUT 5
+
–
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28
27
26
24
23
22
21
20
19
18
17
16
15
25
LEVEL
SHIFT
LEVEL
SHIFT
THERMAL
SHUT-DOWN
REGULATOR
BIAS TRAP
LEVEL
SHIFT
MUTE
LEVEL
SHIFT
D.BUFF
D.BUFF
D.BUFF
GND
IN4
IN4'
BIAS
VCC
VCC
IN3'
IN3
VO3(+)
VO3(–)
VO4(–)
VO4(+)
RESETt
OPIN
VO1(–)
REGB
VO1(+)
IN1
RESET
REGOUT
MUTE
GND
IN2'
IN2
VO2(+)
VO2(–)
GND
OPOUT
D.BUFF
D.BUFF
D.BUFF
D.BUFF
D.BUFF
REGULA
TOR
VCC
VCC
VIN 1
CE 3
VSS 2
NC 4
VOUT 5
+
–
ON/OFF
CONTROL
CURRENT
LIMIT
VOLTAGE
REFERENCE
CONTROL
CIRCUIT
BANDGAP
REFERENCE
+
–
OVER HEAT &
OVER CURRENT
PROTECTION
1
VCONT
3
NP
2
GND
4
VOUT
5
VIN
IC401 BA5826SFP-E2
– BT Board –
IC903 XC6213B332MR
– IP Board –
IC102 TK11133CSCL-G