Sony CDX-444RF Service Manual page 32

Q Q
• Waveforms
3 7 6 3 1 5 1 5 0
– RF Board – – MAIN Board –
1 IC101 qh (RFO) (CD play mode) 1 IC101 uj (LRCK), uk (LRCKI)
(CD play mode)
1.4 ± 0.3
Vp-p
2 IC101 qf (FE) (CD play mode) 2 IC101 ia (BCK), is (BCKI)
(CD play mode)
Apporx.
63 mVp-p
470 ns
3 IC101 qd (TE) (CD play mode) 3 IC101 ih (XTAI) (CD play mode)
T E
L 1 3 9 4 2 2 9 6 5 1 3
Approx.
63 mVp-p
60 ns
4 IC101 wf (SCOR),
IC201 is (SCOR) (CD play mode)
5 IC201 ra (EXTAL) (CD play mode)
w w w
– FM Board –
1 IC701 8 (38K) (CD play mode)
5.6 Vp-p
26.3 µs
22.8 µs
2 IC781 1 (XOUT) (CD play mode)
5.7 Vp-p
139 ns
3 IC781 qa (FMIN) (CD play mode)
4.1 Vp-p
11.3 ns
5 Vp-p
13.4 ms
4.4 Vp-p
x a o
. i
83 ns
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• IC Block Diagrams
– RF Board –
IC101 CXA2596M-T6
HOLD 1
AGCVTH 2
4.1 Vp-p
APC LD
LD 3
AMP
APC PD
PD 4
AMP
AGC
COMPARATOR
A 5
B 6
RF SUMMING
C 7 AMP
2.9 Vp-p D 8
FOCUS ERROR
VEE 9
AMP
F 10
F I-V AMP
E 11
E I-V AMP
VCC
VC 12
VEE
Q Q
3 7 6
240 mVp-p
IC201 LA6576L-TE-L
FWD 1
INPUT
2
REV
3
VCC2
4
VLO–
VLO+ 5
VO4+ 6
VO4– 7
VO3+ 8
VO3– 9
VO2+ 10
VO2– 11
VO1+ 12
VO1– 13
VCC1 14
15
VIN1
u 1 6 3
y
VIN1–A 16
– AMP-A
+
VIN1+A 17
VIN1–B 18 – AMP-B
+
32 32
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2 4
8 9 9
24 VCC
23 LC/PD
22 LD ON
21 HOLD SW
20 AGCCONT
19 RF BOT
18 RFTC
COMPARATOR
17 RF I
RF EQ
16 RFO
AMP
15 RFE
14 FE
TRACKING
13 TE
ERROR
AMP
3 1 5 1 5 0 8 9
S-GND
36
THERMAL SHUT DOWN
CH2-4
35 MUTE2
MUTE
CH1
34
MUTE1
MUTE
OUTPUT
33 VIN4
CONTROL
32 VIN4–
31 VIN4+
LEVEL
SHIFT
30 VREF-IN
VIN1/VREF
29 VIN1 (VREF)-SW
SWITCH
LEVEL
28 VREF-OUT (CH1)
SHIFT
5VREG
+
–
27 REG-OUT
–
+
26 REG-IN
25
VIN3+
+
–
LEVEL
24 VIN3–
SHIFT
23 VIN3
22
VIN2+
+
LEVEL
–
SHIFT
21
VIN2–
m
20 VIN2
–
19 VIN1+B
+
c o
.
2
8 9 9
2 4 9 8 2 9 9