Denon DVD-1600, Руководство по обслуживанию

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8.4.3. ADSC internal RAM display function
1. Operation/display
Key operation: Main unit PAUSE+OPEN + remote controller [RETURN] Operate the remote controller [CLEAR] key to update
internal RAM address and display 11 learned values.
Table 1 shows the descriptions of the display.
2. How to utilize
At present, learned values of ADSC internal RAM are expected to be useful for the following faulty part identification.
Use how learned value changes from initial value to find whether faulty part exists before or after ADSC in the focus/tracking
servo system.
[Focus system]
When focus gain remains at initial value and tracking gain changes, fault exists before ADSC input.
When focus gain changes and tracking gain remains at initial value, fault exists after ADSC output.
[Tracking system]
When focus gain remains at initial value and tracking gain changes, fault exists after ADSC output.
When focus gain changes and tracking gain remains at initial value, fault exists before ADSC input.
Table 1 ADSC internal RAM learned value
Address Memory data Data range Standard value
4B4 Focus gain learned value except for DVD DL (L1 layer) 0040h~0800h 200h
4BC Focus gain learned value of DVD DL (L1 layer) 0040h~0800h 200h
4B6 Focus balance learned value except for DVD DL (L1 layer) B000h~5000h 0000h
4BE Focus balance learned value of DVD DL (L1 layer) B000h~5000h 0000h
4B5 Tracking gain learned value except for DVD DL (L1 layer) 0040h~0800h 200h
4BD Tracking gain learned value of DVD DL (L1 layer) 0040h~0800h 200h
TB0 Tracking balance learned value of DVD SL and DL (L0) 0060h~FFA0h 0000h
Tracking balance learned value of CD and VCD B000h~5000h 0000h
TB1 Tracking balance learned value of DVD DL (L1 layer) FFA0~0060h 0000h
DBD DSL offset learned value of DVD 9000h~F000h
DBC DSL offset learned value of CD and VCD 9000h~F000h
FC0 Equalizer FC value except for DVD DL (L1 layer) 0000h~0004h
BT0 Equalizer BOOST value except for DVD DL (L1 layer) 0000h~0004h
FC1 Equalizer FC value of DVD DL (L1 layer) 0000h~0004h
BT1 Equalizer BOOST value of DVD DL (L1 layer) 0000h~0004h
Notes:
1. Learned values of focus balance and tracking balance are the coded binary data.
2. DSL offset learned value is effective only in upper 2 digits. (Lower 2 digits, normally 06, are ignored.)
Picking up servo learned value (Determined)
1. Focus (primary)/tracking balance learning ... When leading in focus
2. Focus/tracking gain and equalizer ... When leading in tracking
3. Focus balance (secondary) ... When leading in tacking
[Note]
When fault exists somewhere after tracking servo, the disc type is switched by retry to make learned value different from the
one in normal startup.