Mechanical Adjustment - Sony CDX-747X Service Manual

CDX-747X
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• Elevator Height (Address) Adjustment
Note: This adjustments is necessary when the system controller (IC201),
variable resistor (RV201), slider (R), slider (L), or chassis (ELV)
was replaced for any repair.
Connection:
power supply
(DC 14.4 V)
master unit
+
GND
CONTROL connector
(CN901)
TE
L 13942296513
comb tooth at address 5
www
RV201
.
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SECTION 5

MECHANICAL ADJUSTMENT

BUS cable
compact disc changer
comb tooth at address 6
A
B
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8
Adjustment Method:
1. Connect this set to the master unit (e.g. MDX-C7970/C7970R),
load a disc magazine, and place the set vertically as shown
below.
2. Connect the regulated power supply to the master unit, and
turn the power on.
3. Press the DISC button on the master unit and select DISC 5.
4. At this time, if the elevator shaft does not position between
comb teeth A and B at addresses 5 and 6 as shown below,
adjust the following.
5. Press repeatedly the DISC + and – buttons on the master unit
so that the elevator shafts moves from address 6 to address 5,
or from 5 to 6. At this time, adjust RV201 on the main board
so that the elevator shaft positions smoothly between comb
teeth A and B.
6. Further, place the set horizontally and make same adjustment
as mentioned above.
7. After adjustment at addresses 5 to 6 is finished, check all op-
erations from addresses 1 to 10 with the set placed vertically
and horizontally respectively to confirm that the elevator shaft
positions in a range between comb teeth A to B.
Q Q
3 6 7 1 3 1 5
comb tooth at address 6
elevator shaft
A
B
OK NG
co
.
9 4 2 8
0 5 8 2 9 9 4 2 8
elevator shaft
comb tooth at address 5
m
9 9
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