Denon S-302 Service Manual page 16

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1. Iop checked Method 3 7 63 1515 0
Select the laser ON/OFF (CD/DVD) mode of the test mode,
and check the lop value of DVD laser or CD laser.
(See page 21 for test mode.)
1.1. DVD laser current check
(1) Press the SKIP
ser current value, and then select T22.
(2) Press the PLAY button and check the current value of
Iop (nnnn).
(Use the disc TDV-520)
( : Off, DVD laser, Initial value: mm.mm [mA],
Current value: nn.nn [mA])
1.2. CD Laser current check
(1) Press the
current value, and then select T21.
(2) Press the PLAY button and check the current value of
Iop (nnnn).
(Use the disc TCD-784)
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L 13942296513
( : Off, CD laser, Initial value: mm.mm [mA],
Current value: nn.nn [mA])
2. Note for Handling the Laser Pick-Up
The protection for the damage of laser diode.
If you want to change the optical device unit from any other
units, you must keep the following.
(1) It should be done at the desk already took measures the
static electricity in care of removing the OPU's (Optical
device unit) connector cable.
(2) Workers should be put on the "Earth Band".
(3) It should be done to add the solder to the short land to
prevent the broken Laser diode before removing the 24P
FFC cable.
(4) Don't touch OPU's connector parts carelessly.
3. Replacement of the Laser Pick-up
(Traverse Unit)
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Check the Iop (Laser drive current)
If the present Iop (current) value exceeds.+150% of the ini-
tial value, replace the Traverse unit (Laser Pick-up) with a
new one.
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