Akai ADP-841, Service Manual

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MT1389 B/ C
PRELIMINARY, SUBJECT TO CHANGE WITHOUT NOTICE MTK CONFIDENTIAL, NO DISCLOSURE
2
MTK Confidential A
FOR SZ_MTK USE ONLY
Pin Main Alt. Type Description
ALPC ( 4 )
20 MDI1 Analog Input Laser power monitor input
21 MDI2 Analog Input Laser power monitor input
22 LDO2 Analog Output Laser driver output
23 LDO1 Analog Output Laser driver output
ADC for SACD ( 5 )
239 ADCVDD3 Power Analog 3.3V Power for ADC
240 NC
241 ADCVSS Ground Analog ground for ADC
242 NC
243 NC
Reference Voltage ( 3 )
28 V2REFO Analog output Reference voltage 2.8V
29 V20 Analog output Reference voltage 2.0V
30 VREFO Analog output Reference voltage 1.4V
Analog Monitor Output ( 7 )
24 SVDD3 Power Analog power 3.3V
25 CSO RFOP Analog output
1) Central servo
2) Positive main beam summing output
26 RFLVL RFON Analog output
1) RFRP low pass, or
2) Negative main beam summing output
27 SGND Ground Analog ground
31 FEO Analog output Focus error monitor output
32 TEO Analog output Tracking error monitor output
33 TEZISLV Analog output TE Slicing Level
Analog Servo Interface ( 6 )
244 RFVDD3 Power Analog Power
245 RFRPDC Analog output RF ripple detect output
246 RFRPAC Analog Input RF ripple detect input(through AC-coupling)
247 HRFZC Analog Input High frequency RF ripple zero crossing
248 CRTPLP Analog output Defect level filter capacitor connecting
249 RFGND Ground Analog Power
RF Data PLL Interface ( 9 )
230 JITFO Analog output The output terminal of RF jitter meter.
231 JITFN Analog Input The input terminal of RF jitter meter.
232 PLLVSS Ground Ground pin for data PLL and related analog circuitry.