Sony HCD-BX2 Service Manual page 32

• Waveforms
– DECODE Board –
1 IC701 1 (FEO) (CD Play Mode) 6 IC702 rd (BCK) (CD Play Mode)
Approx.
200 mVp-p
2 IC701 ed (RF O), IC702 eg (RF) 7 IC702 u; (XTAI)
(CD Play Mode)
1.1 Vp-p
16.9344 MHz
3 IC701 rg (TEO) (CD Play Mode)
Approx.
100 mVp-p
– FRONT Board –
4 IC702 wa (MDP) (CD Play Mode) 1 IC601 el (X'TAL)
2.6 Vp-p
7.6 µs
5 IC702 ef (LRCK) (CD Play Mode)
6.6 Vp-p
22.7 µs
– MAIN Board –
1 IC103 1 (XIN)
6.4 Vp-p
7.2 MHz
354 ns
2 Q251 (Base)
4.3 Vp-p
11.4 µs
3 Q251 (Collector)
11.4 µs
4 Q251 (Emitter)
3.7 Vp-p
10 MHz
11.4 µs
• IC Block Diagrams
– DECODE Board –
IC701 CXA1992BR
39 38 37 36
PD 2 PD 1 PD LD
2.4 Vp-p
I-V AMP I-V AMP AMP AMP
VCC
LASER
POWER
CONTROL
IFB1 – IFB6
FE
40
BIAS
FOCUS ERROR
AMP
VEE
2.3 Vp-p
F I-V
F 41
AMP
E I-V TRACKING GAIN
TGFL
E
42
AMP WINDOW
COMPARATOR
EI 43
VEE 44 VEE
TEO 45
E-F BALANCE
WINDOW
LPFI 46
COMPARATOR
TEI 47
ATSC
13.6 Vp-p
ATSC 48 WINDOW
COMPARATOR
TZC
TZC 49
COMPARATOR
TM1
DFCT
TDFCT 50
VC 51
FZC 52
FOCUS PHASE
0.5 Vp-p
COMPENSATION
FS4
DFCT
1 2 3 4 5 6
32 32
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
28 27
IIL
↓
TTL
26 SENS2
IIL
↓
25 SENS1
TTL
24 C. OUT
23 XRST
22 DATA
TTL
↓
21 XLT
IIL
20 CLK
19 LOCK
VCC 18 VCC
VCC
ISET 17 ISET
TM6
16 SL O
SL M
15
SL P
14
TM5
TM2
VEE
VCC
TM4
TM3
VEE
12 13