Read Harman Kardon CDR 20 (serv.man18) Service Tips online
LG Electronics DAV Engineering LAB.
Block Diagram of CDR [CDR 20]
I / V AMP
I / V AMP
RF Amplifier
(CXA2551R:Sony)
• Equalizer
• ALPC
• Focus Error
• Tracking Error
• Wobble Detect
• ALPC
• Focus Error
• Tracking Error
• Wobble Detect
Spindle
Driver
(BA6664FM
: Rohm)
LD
LD
Driver
Driver
Encoder/Decoder
(OTI9790:OAK Technology)
• CD-Encode
• EFM Encode
• CD-Decode
• LPM
• ATIP CLV Control
• ATAPI I/F
• EFM Encode
• CD-Decode
• LPM
• ATIP CLV Control
• ATAPI I/F
Digital Servo Processor
• Focus Servo
• Tracking Servo
• Sled Servo
• Spindle Servo
• EFM decoding
• Tracking Servo
• Sled Servo
• Spindle Servo
• EFM decoding
ASIC
(VC00S01
,XC10TQ80)
•Switching
•Serial to Parallel
,XC10TQ80)
•Switching
•Serial to Parallel
Data convertion
-Controller
(HD84F/3062:Hitachi)
• System Control
• Read Channel
• Data Processor
• Servo Processor
• ATAPI Control
• Read Channel
• Data Processor
• Servo Processor
• ATAPI Control
Focus Tracking
Sled Driver
(BA5983FM : Rohm)
Spindle
motor
Sled
Sled
motor
motor
Pick
Pick
-
-
up
up
(KRS
(KRS
-
-
220C
220C
:Sony)
:Sony)
disc
CPLD
CPLD
(XC9536 : XILINX)
(XC9536 : XILINX)
Laser CTL
Laser CTL
S/H Signal Gen.
S/H Signal Gen.
Audio DAC
Audio DAC
L/R
L/R
-
-
CH Jack &
CH Jack &
Headphone
Headphone
SRC
(CS8420:
Cirrus Logic)
• 8kHz to 96KHz
• 120dB Dynamic
• 120dB Dynamic
Range
CDP
D-out
I/O Board
Audio ADC
Audio ADC
Digital in
Digital in
L/R
L/R
-
-
CH Jack &
CH Jack &
Optical Jack
Optical Jack
I/O Board
CDP
A/Data
A/Data
S-data
To CDP:I/F
12 CH 8bit DAC
(M62352)
Sled Speed
(BA5925)
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