Akai ADP-841, Service Manual

Page: 14 / 39

Version 1.
MT1389 B/ C
Specifications are subject to change without notice
Pin Assignment
2004/6/10
FOR SZ_MTK USE ONLY
Abbr. :
SR : Slew Rate
PU : Pull Up
PD : Pull Down
SMT : Schmitt Trigger
2MA~16MA : Output buffer driving strength.
Pin Main Alt. Type Description
RF Interface ( 28 )
226 RFGND18 Ground Analog ground
227 RFVDD18 Power Analog power 1.8V
250 NC
251 NC
252 OSP Analog output RF Offset cancellation capacitor connecting
253 OSN Analog output RF Offset cancellation capacitor connecting
254 RFGC Analog output RF AGC loop capacitor connecting for DVD-ROM
255 IREF Analog Input
Current reference input. It generates reference current for
RF path. Connect an external 15K resistor to this pin and
AVSS.
256 AVDD3 Power Analog power 3.3V
1 AGND Ground Analog ground
2 DVDA Analog Input AC coupled input path A
3 DVDB Analog Input AC coupled input path B
4 DVDC Analog Input AC coupled input path C
5 DVDD Analog Input AC coupled input path D
6 DVDRFIP Analog Input AC coupled DVD RF signal input RFIP
7 DVDRFIN Analog Input AC coupled DVD RF signal input RFIN
8 MA Analog Input DC coupled main-beam RF signal input A
9 MB Analog Input DC coupled main-beam RF signal input B
10 MC Analog Input DC coupled main-beam RF signal input C
11 MD Analog Input DC coupled main-beam RF signal input D
12 SA Analog Input DC coupled sub-beam RF signal input A
13 SB Analog Input DC coupled sub-beam RF signal input B
14 SC Analog Input DC coupled sub-beam RF signal input C
15 SD Analog Input DC coupled sub-beam RF signal input D
16 CDFON Analog Input CD focusing error negative input
17 CDFOP Analog Input CD focusing error positive input
18 TNI Analog Input 3 beam satellite PD signal negative input
19 TPI Analog Input 3 beam satellite PD signal positive input