Denon DVM-4800, Service Manual

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DVM-4800
3.4 Servo Process Display Mode
In starting operation of the player, a number is allotted to each servo process so that the operation of each step can be seen.
The relation between the process and the displayed number are as follows:
Process classification Each processing item Description Process number
Initial start process Initial start The process starts after the tray is loaded. (The state 0~40
is changed to "READY" or "PREPARE".)
Secondary learning Servos for the DVD-DL 1st layer and the CD-DA double 50~7F
speed are learned in this step.
Restart process Restart When a user operates in the "READY" state, each servo 80~9F
is turned on.
Seek process Seek The optical pickup is moved to the disc destination in A0~BF
this process.
Repair process Recover
(Error check) An error is searched in the PLAY/SEEK state. C1~C3
(Attention) An error is recovered following the attention error C4~C6
interrupt from the S-ODC.
(Q code read) If any Q code is improperly read, reset and retry. C7~C9
Stop process Stop A servo is controlled in response to the user's operation F0~FF
to stop the disc completely.
Number allotment to the servo process
3.5 ADSC Internal Ram Data Display
The servo learning value in the RAM data inside the servo processor ADSC is displayed.
The value is useful for the servo operation/disc quality judge including the OPU.
The concrete contents are shown below:
Address
Contents of display
4B4 Focus gain learning value for DVD-S, DVD-D(L0), CD, and VCD
4BC Focus gain learning value for DVD-D(L1)
4B6 Focus balance learning value for DVD-S, DVD-D(L0), CD, and VCD
4BE Focus balance learning value for DVD-D(L1)
4B5 Tracking gain value for DVD-S, DVD-D(L0), CD, and VCD
4BD Tracking gain value for DVD-D(L1)
TB0 Tracking balance value for DVD-S, DVD-D(L0), CD, and VCD
TB1 Tracking balance value for DVD-D(L1)
DBD DSL offset learning value for DVD-S and DVD-D
DBC DSL offset learning value for CD and VCD
FC0 Equalizer FC value for DVD-S, DVD-D(L0), CD, and VCD
BT0 Equalizer BOOST value for DVD-S, DVD-D(L0), CD, and VCD
FC1 Equalizer FC value for DVD-D(L1)
BT1 Equalizer BOOST value for DVD-D(L1)