LG GSA-H20A Service Manual page 11

3.3.2 Burst transfer rate
Ultra DMA Mode 2..........................................33.3 Mbytes/s Max.
Multiword DMA Mode 2..................................16.6 Mbytes/s Max.
PIO Mode 4 ....................................................16.6 Mbytes/s Max.
3.4 Access time (Random)
* Typical value
DVD-ROM(SL) ...............................................140 ms Typ.
DVD-ROM(DL) ...............................................175 ms Typ.
CD-ROM ........................................................120 ms Typ.
DVD-RAM ......................................................200 ms Typ.
Note :
1) Average random access time is the typcal value of more than 50 times including latency and error correction time.
Test Disc : DVD : ALMEDIO TDV-520 / TDR-820
*) Typical value defines a measured value in normal temperature (20 deg.C.) and horizontal position.
3.5 Data error rate (Measured with 5 retries maximum)
DVD-R/RW/ROM/RAM ..................................<10
DVD+R/RW....................................................<10
CD-ROM/R/RW..............................................<10
Condition : It is assumed that the worst case raw error rate of the disc is 10
3.6 Data buffer capacity .......................................................2Mbytes
3.7 LightScribe Label Printing (** MKM LS-CD 2.0, ** Full Image Printing)
3.7.1 Printing Time
Best............................................................................less than 29 minutes
Normal .......................................................................less than 24 minutes
Draft ...........................................................................less than 18 minutes
3.7.2 Image Contrast complying to the colorimetry standard CIE L*a*b, defined as Delta L(
Best ............................................................................higher than 28
Normal........................................................................higher than 20
Draft ...........................................................................higher than 12
* Note (1) DRF Parameters for this spec : Max LV=1400mm/sec, TrackShift=85 or 75,
(2) T.B.D (High Speed LightScribe Label Printing)
4. Quality and Reliability
4.1 MTBF..................................................125,000 Power On Hours(Consecutive/Cumulative POH)
Assumption : ..........................Used in a normall office environment at room temperature.
-POH per year.........................3,000
-ON/OFF cycles per year........600
-Operating duty cycle..............20% of power on time (Seek: 5% of operating time)
4.2 Tray cycle test...................................30,000 times
4.3 Actuator mechanism ........................1,000,000 full stroke seek
4.4 MTTR (Mean Time To Repair) ...........0.5 h
4.5 Component life .................................5 years or 2,000 h of Laser radiating time
Assumption : ..........................Used in a normall office environment.
CD : ALMEDIO TCDR-701 / HITACH HCD-1
Max. Laser Power=38mW
No degeneration in the mechanical part after test
(Note 1)
(Note 1)
(Note 1)
(Ver 2.0 & higher)
(Note 1)
-12
-12
-12 (Mode-1)
<10 (Mode-2)
-9
-3
ΔL)
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