6-17
[MA-C22 BOARD] (SIDE B)
CNJ201
(2/2)
CNJ201
(2/1)
CNJ202
IC102
CNJ102
SOL105
CL118
CL116
CL117
CNJ103
CL165
TP IOP (CL165)
Laser Current Check
TP V (CL117)
TP W (CL116)
TP U (CL118)
Spindol Motor
Drive Check
[Check Laser Current]
a. Touch the IOP test land (CL165) on the MA-C22 Mounted Board.
b. Measure the voltage generated by the laser current while the drive
in process of focus search.
c. It is supposed to be about 4.5V because the voltage of IOP will
drop by IOP x10
Ω
from 5V-A.
d. Otherwise replace the optical pick-up.
6-3-4-9. Chucking Mechanism
a. Listen the sound from the drive while the drive is spinning up.
b. Check if there is any slipping noise among the Turntable, the
Chucking Pulley Ass'y and the Disc.
c. If you hear any, disassemble the drive and check if there is exces-
sive dust or any contamination on the Turntable or the disc.
d. Otherwise replace the Chucking Pulley Ass'y.
6-3-4-10. Sled Motor
a. Disconnect the Sled Motor wires from the P.W.B.
b. Check the resistance between 2 terminals of sled motor.
c. It should be 20.3 ± 1.9
Ω
.
6-3-4-11. Spindle Motor Drive
Monitor the following signals to find if IC402 is defective.
a. Check the control signal at SOL105. In CAV mode the control
signal is sent from IC106 No.15 pin.
In CLV mode that is sent from IC105 No.50 pin with 3-state drive
signal.
b. Check if the voltage difference between VH+ (IC402 30 pin) and
VH– (IC402 29 pin) shows approximately 1.0V. (This voltage
shows Hall Elements Bias Voltage for Spindle Motor)
c. Check if U (CL118), V (CL117), W (CL116) OUT signal shows
motor driving voltage.
Содержание CDL1100
Страница 8: ...6 7 Power Supply Power Cord SONY Test Disc YEDS 18 CDL1100 CDM 47 Controller Function check ...
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