HHB CDR-850 Service Manual page 58

CDR-850
6.5.4 Focus Bias Adjustment
Test Point
Adjustment Point
Adjustment Value
[Procedure]
(1) Press the DIGITAL SYNCHRO button in Stop mode.
Note: Make sure the unit is in Stop mode.
(2) Check that "48" appears on the FL display.
(3) Press the AUTO/MANUAL button so that "04 34" appears on the FL display.
(4) Press the FINALIZE button for focus-in.
(5) Press the PLAY button for CAV-servo spindle kick.
(6) Press the PAUSE button to close the tracking servo, then set the unit to Playback mode.
(7) Adjust with the RECORD and REC MUTE buttons until the above adjustment value to be reached is obtained.
Press the SET button to register the adjustment. Once the adjustment is registered with the SET button, "?" on the FL display will
disappear.
(8) Press the STOP button to stop the unit.
RF
10 : 1
VC
10:1 probe
Note: Adjustment must be done around mid-radius on a disc.
58
CN354 - pin 1 (RF)
DIGITAL SYNCHRO button, RECORD button and REC MUTE button
Adjust until RF jitter is minimal or that the eye pattern of the RF waveform is most open.
Jitter Meter
or
Oscilloscope