Daewoo AKD-80C, Service Manual

Page: 18 / 29

DAEWOO
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PIN
No
RF output pin. 41 RFSM
RF gain setting and EFM signal 3T compensation constant setting pin, along with the RFSM pin. 42 RFS-
Slice Level Control is an output pin that controls the data slice level used by the DSP for the
RF wave form.
43 SLC
SYMBOL CONTENTS
Input pin used by DSP for controlling the data slice level. 44 SLI
Digital system GND pin. 45 DGND
Focus search smoothing capacitor output pin. 46 FSC
Tracking balance control, EF balance adjustment variable range setting pin. 47 TBC
No connection 48 NC
Disc defect detection output pin. 49 DEF
Reference clock input pin. 4.23 MHz signal from the DSP is input. 50 CLK
Microprocessor command clock input pin. 51 CL
Microprocessor command data input pin. 52 DAT
Microprocessor command chip enable input pin. 53 CE
RF level detection output (Detect RF) 54 DRF
Focus search select; focus search mode (+search vs. the reference voltage)
switching pin
55 FSS
Servo system and digital system VCC pin.
By-pass capacitor connection pin for reference voltage.
Reference voltage output pin.
56 VCC2
VCC1
57 REFI
58 VR
Disc defect detection time constant setting pin. 59 LF2
RF signal peak hold capacitor connection pin.
RF signal bottom hold capacitor connection pin.
60 PH1
61 BH1
APC circuit output pin.
APC circuit input pin.
62 LDD
63 LDS
RF system VCC pin. 64