JVC TH-A75R Service Manual page 24

TH-A75R
4.8 AN8703FH-V (IC101) : Frontend processor for DVD
• Pin layout
16
• Pin function
Pin No. Symbol I/O
1 LPC1 I
2 LPC01 O Laser drive signal output terminal (DVD)
3 LPC2 I
4 LPC02 O Laser drive signal output terminal (CD)
5 VFOSHORT I
6 TBAL I
7 FBAL I
8 POFLT O Track detection threshold level terminal
9 DTRD I
10 IDGT I
11 STANDBY I
12 SEN I
13 SCK I
14 STDI I
15 RSCL I
16 JLINE I
17 TEN I
18 TEOUT O Tracking error signal output terminal
19 AGCBAL I
20 ASOUT O Full adder signal output terminal
21 FEN I
22 FEOUT O Focus error signal output terminal
23 AGCOFST I
24 MON -
25 AGCLVL O Output amplitude adjustment for DRC
26 GND2 -
27 VREF2 O VREF2 voltage output terminal
28 VCC2 -
29 VHALF O VHALF voltage output terminal
30 DFLTON O Reversing output terminal of filter AMP.
31 DFLTOP O Filter AMP. output terminal
32 DCFLT I
1-24 (No.21189)
64 49
1 48
33
17 32
Description
Laser input terminal (DVD)
Laser input terminal (CD)
VFOSHORT control terminal
Tracking balance control terminal
Focus balance control terminal
Data slice part data read signal input ter-
minal(For RAM)
Data slice part address part gate signal
input terminal( For RAM)
Standby mode control terminal
SEN(Serial data input terminal)
SCK(Serial data input terminal)
STDI(Serial data input terminal)
Standard electric current terminal
Electric current setting terminal of JLine
Reversing input terminal of tracking error
output AMP.
Offset adjusting terminal 1
Focus error output amplifier reversing in-
put terminal
Offset adjusting terminal 2
Non connect
Connect to GND
Power supply terminal 5V
Capacity connection terminal for filter
output
Pin No. Symbol I/O
33 GND3 - Connect to GND
34 RFDIFO - Non connect
35 RFOUT - Connect to TP103
36 VCC3 - Power supply terminal 3.3V
37 RFC O Filter for RF delay correction AMP.
38 DCRF O All addition amplifier capacitor terminal
39 OFTR O OFTR output terminal
40 BDO O BDO output terminal
41 RFENV O RF envelope output terminal
42 BOTTOM O Bottom envelope detection filter terminal
43 PEAK O Peak envelope detection filter terminal
44 AGCG O AGC amplifier gain control terminal
45 AGCO O AGC amplifier level control terminal
46 TESTSG I TEST signal input terminal
47 RFINP I RF signal positive input terminal
48 RFINN I RF signal negative input terminal
49 VIN5 I Internal four-partition (CD) RF input 1
50 VIN6 I Internal four-partition (CD) RF input 2
51 VIN7 - Internal four-partition (CD) RF input 3
52 VIN8 - Internal four-partition (CD) RF input 4
53 VIN9 I External two-partition (DVD) RF input 2
54 VIN10 I External two-partition (DVD) RF input 1
55 VCC1 - Power supply terminal 5V
56 VREF1 O VREF1 voltage output terminal
57 VIN1 I Internal four-partition (DVD) RF input 1
58 VIN2 I Internal four-partition (DVD) RF input 2
59 VIN3 I Internal four-partition (DVD) RF input 3
60 VIN4 I Internal four-partition (DVD) RF input 4
61 GND1 - Connect to GND
62 VIN11 I 3 beam sub input terminal 2 (CD)
63 VIN12 I 3 beam sub input terminal 1 (CD)
64 HDTYPE O HD Type selection
Description