DRM-6NX
39
CD-ROM Player
1. Focus Offset Check
Focus Error Offset
and
Tracking Error Offset
Auto Adjustment
2. Tracking Error Barance Check
Oscilloscope
DC Mode
V: 1 V/div
H: 10 mSec/div
GND
Prove(10:1)
MAIN BOARD ASSY
FE
GND
START
GND
Prove(10:1)
VREF
VREF
GND
FCS.ERR
GND
(CH1)
(CH2)
A
B
Check
Oscilloscope
DC Mode
V: 500 mV/div
H: 5 mSec/div
GND
Prove(10:1)
PLAY
R=35mm
TEST DISC
PLAY
TEST DISC
Test mode 1
SPDL servo
=
CLOSE
FOCUS servo
=
CLOSE
TRKG servo
=
OPEN
PLAY MODE
6.2.3 CHECK AND ADJUSTMENT
A=B
VREF
A
B
A
≠
B
VREF
A
C
B
START
TE
VREF
MAIN BOARD ASSY
CD-ROM Player
When there is a DC
component
When there is no DC
component
6.2 ADJUSTMENT