HP LJ 2420 - co oznaczają błędy 52.00 i 59.9?

Mam 2 oddzielne błędy:

1. 52.00 - jest to jakiś błąd kasety ale czy ktoś wie coś więcej?

2. 59.9 - ?

Przeniosłem z: Schematu/instrukcji…

Error 52.xx:
1. Press the SELECT ( ) button
to continue.
2. Turn the printer off, and then
turn the printer on again.
3. Reseat the connectors
between the laser/scanner
and ECU (J83 and J84).
4. Replace the laser/scanner
assembly (see Laser/scanner.
5. Replace the ECU (see ECU).

Error 59.xx:
59.00, 59.10, 59.20 Motor failure
1. Turn the printer off, and then
turn the printer on again.
2. Reconnect the main-motor
wire-harness on the ECU
3. Replace the gear assembly
(see Gear assembly.
4. Replace the ECU (see ECU).
59.A or 59.4 EP Motor failure
1. Turn the printer off, and then
turn the printer on again.
2. Reconnect the EP-motor wireharness
on the ECU.
3. Replace the gear assembly
(see Gear assembly.
4. Replace the ECU (see ECU).