Sony HCD-XB8 Service Manual page 45

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Pin No.
RF M
34
35 RFTC
36 LD
37 PD
38 PD1
39 PD2
40 FE BIAS
F
41
42 E
EI
43
44 VEE
45 TEO
46 LPFI
TEI
47
48 ATSC
49 TZC
50 TDFCT
51 VC
52 FZC
• Abbreviation
APC : Auto Power Control
Pin Name I/O
RF summing amplifier inverted input
I The RF amplifier gain is determined by the resistance connected between this pin and
RFO pin
I External time constant setting pin during RF level control
O APC amplifier output
APC amplifier input
I
RF I-V amplifier inverted input
I
Connect these pins to the photo diode A+C and B+D pins
I
Bias adjustment of focus error amplifier
I
Leave this pin open for automatic adjustment
I F I-V and E I-V amplifier inverted input
I Connect these pins to photo diodes F and E
I-V amplifier E gain adjustment
–
(When not using automatic balance adjustment)
– Negative power supply
Tracking error amplifier output
O
E-F signal is output
Comparator input for balance adjustment
I
(Input from TEO through LPF)
I Tracking error input
I Window comparator input for ATSC detection
I Trackig zero-cross comparator input
I Capacitor connection pin for defect time constant
O (V
Focus zero-cross comparator input
I
+ V )/2 direct voltage output
CC EE
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Function
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