Sony CDX-424RF Service Manual page 24

• Waveforms
– RF Board – – MAIN Board (1/2) –
1 IC11 #£ (RF O) 1 IC101 @¶ (MDP)
500 mV/DIV, 500 ns/DIV
1.4 Vp-p
2 IC11 2 (FEI) 2 IC101 %º (LRCK)
50 mV/DIV, 1 µs/DIV
Approx.
110 mVp-p
3 IC11 $¶ (TEI) 3 IC101 %¢ (BCK)
200 mV/DIV, 500 µs/DIV
Approx.
280 mVp-p
472 ns
4 IC101 *ª (XTAI)
5 IC302 #¡ (EXTAL)
– MAIN Board (2/2) –
6 IC401 !£ (MCK)
2.5 Vp-p
7.6 µ s
59.5 ns
7 IC401 !§ (XO)
6 Vp-p
22.7 µ s
58.6 µ s
8 IC401 @£ (BCK)
6.2 Vp-p
472 ns
9 IC401 @¢ (LRCK)
6 Vp-p
22.7 µ s
59.2 ns
3.8 Vp-p
124 ns
– 31 –
• IC Block Diagrams
– RF Board –
IC11 CXA1992BR
39 38 37 36
6 Vp-p
PD 2 PD 1 PD LD
I-V AMP I-V AMP AMP AMP
VCC
LASER
POWER
CONTROL
IFB1 – IFB6
FE
40
BIAS
FOCUS ERROR
AMP
5.8 Vp-p VEE
F I-V
F 41
AMP
E I-V TRACKING GAIN
TGFL
E
42
AMP WINDOW
COMPARATOR
EI 43
VEE
VEE 44
TEO 45
E-F BALANCE
WINDOW
LPFI 46
COMPARATOR
TEI 47
ATSC
7.6 Vp-p
ATSC 48 WINDOW
COMPARATOR
TZC
49
TZC
COMPARATOR
TM1
DFCT
TDFCT 50
VC
51
FZC
52
7.3 Vp-p
FOCUS PHASE
COMPENSATION
FS4
DFCT
1 2 3 4 5 6
35 34 33 32 31 30 29
RF SUMMING
FOCUS OK
AMP
COMPARATOR
PEAK/BOTTOM
MIRR
HOLD COMPARATOR
PEAK/BOTTOM DEFECT
HOLD AMP
FOCUS BIAS
WINDOW
COMPARATOR
TGH
TGL
BALH IIC DATA REGISTER, INPUT SHIFT REGISTER,
ADDRESS DECODER, SENSE SELECTOR,
BALL
OUTPUT DECODER
ATSC
TRACKING PHASE
COMPENSATION
TG1
VCC
CENTER
VOLTAGE
TM7
GENERATOR
FZC
VCC
COMPARATOR
VEE
FS1
CHARGE UP
FS2
FSET
TG2
VEE
7 8 9 10 11
– 32 –
28 27
IIL
↓
TTL
IIL 26 SENS2
↓
25 SENS1
TTL
24 C. OUT
23 XRST
TTL 22 DATA
↓
21 XLT
IIL
20 CLK
19 LOCK
18 VCC
VCC
VCC
ISET 17 ISET
TM6
16 SL O
SL M
15
14 SL P
TM5
TM2
VEE
VCC
TM4
TM3
VEE
12 13