Contents
EK–MOL80–SV. B01
v
5 Removal and Replacement (
continued
)
Replacing the Controller PCA....................................................................5–35
....................................................... Replacing the Internal SCSI Cable
5
Replacing the SCSI Interface PCA ............................................................. 5–38
Re–initializing the Jukebox Controller PCA RAM After Service ...............5–40
Field Replaceable Units (FRUs) in the Medium Library.............................5–42
Recommended Service Kits ....................................................................... 5–44
Miscellaneous ............................................................................................5–52
6 Theory of Operation
Autochanger Robotics.........................................................................................6–2
Movements.......................................................................................6–2
The Autochanger Controller PCA .................................................................6–4
Interposer PCA ..............................................................................................6–6
Power Supplies .............................................................................................6–7
SCSI Repeater/Converter/LUN PCA .............................................................6–7
Picker .........................................................................................................6–10
Single–Picker Mode ................................................................................ 6–10
Dual–Picker Mode ................................................................................... 6–10
Two–Move Exchange ..............................................................................6–10
Dual–Picker Exchange ............................................................................. 6–11
Quick Exchange .......................................................................................6–12
The Multi–function Optical Drive & Drive Controller ......................................6–13
Controller PCA ........................................................................................6–14
SCSI Controller........................................................................................6–14
Data Buffer .............................................................................................. 6–14
Formatter/Sequencer ................................................................................ 6–14
Servo PCA ...............................................................................................6–14
DSP Microprocessor and Support/Servo Control Loops ............................6–14
Read and Write Channel Electronics ........................................................ 6–15
Mechanism Assembly.................................................................................... 6–15
Loader Mechanism...................................................................................6–15
Optical Head ............................................................................................ 6–15
Optical Disk Layout and Error Correction.........................................................6–16
Disk Formats ............................................................................................6–16
Controller................................................................................................. 6–17
CPU .........................................................................................................6–17
Gate Array ............................................................................................... 6–17
