Aiwa FR-CD2500, Service Manual

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DMFC
DMPC
2VREF
SEL
FCSI
FKIC
FEL1, FEL2
FEI
TESH
TEOF
SBAD
RFRP
VREF
RFI
GNDA
DTSC2
MONI T
DTSC 1
VDDA
PDCNT
PDO
TMAX
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Pin No. Pin Name I/O Description
IC DESCRIPTION-2/4 (TC9284BF)-2/3
Disc motor CLV servo AFC signal output.
Disc motor CLV servo APC signal output.
Analog power supply. (twice the “VREF” voltage)
Servo mode select output. It turns ON/OFF the laser diode (LD) and focus servo.
Focus actuator drive signal output during focus search mode. “VDDA” to move the lens far from
disc. “L” to move the lens closer to disc. Normally “HiZ”.
Focus actuator drive signal output during focus adjustment mode. “VDDA” to move the lens far
from disc. “L” to move the lens closer to disc. Normally “HiZ”.
Focus gain adjustment analog switch output. “VREF” or “HiZ”.
Focus error signal input.
Analog switch input to track error signal sample-and-hold.
Focus gain adjustment analog switch output.“VREF” when tracking servo off.
Sub beam added signal input.
RF ripple signal input.
Analog power supply.
RF signal input.
Analog GND.
Data slice control EFM signal inverted output.
Internal signal monitored output. EFMO, PLCK or LOCK signals can be selected by command.
Can be muted. (Not used)
Date slice control EFM signal positive polarity output.
Analog power supply.
PDO output control signal input. “L” to fix to “HiZ” forcibly. “H” : normal output.
Phase error signal between EFM and PLCK signals is output.
TMAX detected result output.
TMAX detected result
Longer than specified cycle
Shorter than specified cycle
Within specified cycle
TMAX output
“L”
“VREF”
“HiZ”
Operation
Motor acceleration
CLV servo ON
Motor brake
CLV servo OFF
Command
DMFK
DMSV
DMBK
DMOFF
DMFC output
“2VREF”
AFC signal (PWM)
“L”
“VREF”
SEL output
“L”
“HiZ”
“H”
LD
OFF
ON
ON
Focus servo
OFF
OFF
ON
Operating mode
LD OFF
Focus search
Focus ON (normal play)
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