A730 CD Player
16.11.00 BN
Upgrade Kit 1.630.027.81
Page 1 of 7
New CD Drive for A730
Retrofit Kit MkII 1.630.027.81
Reason:
The CD drive CDM-4 Die-Cast (1.630.010.08/69) is no more available. Therefore, the Retrofit Kit MkII (with
CD drive CDM-4/19) has been developed. The following text contains step-by-step upgrade instructions.
Contents of Retrofit Kit MkII 1.630.027.00
CD drive
1.630.114.00
Mounting bracket
1.630.110.34
Div. wires w. connectors
1.630.114.93
2 Wire straps
35.03.0109
3 Screws M3×8
21.53.0355
2 Spacer bushes 3.25 mm
1.010.161.27
2 Screws M3×10
21.53.0356
1 Countersunk screw M3
21.99.0121
Driver Brush Motor PCB
1.630.075.00
4 Spacer bushes 2 mm
1.010.098.27
Resistor 22 k
Ω
57.11.3223
Resistor 10 k
Ω
57.11.3103
Resistor 130 k
Ω
57.11.3134
Resistor 56 k
Ω
57.11.3563
Capacitor 100 nF
59.03.2104
Capacitor 330 nF
59.06.0334
Label “1.630.072.00”
1.630.072.10
Label “1.630.070.20”
1.630.070.10
Auto-adhesive foam tape
65.99.0180
Solder lug
29.26.1002
The upgrade may be performed by trained personnel only. Please consider the prescriptions for handling of
electrostatically sensitive components (“ESE”) in the “Safety” section at the beginning of the service manual.
Take care to use only appropriate tools for unsoldering and soldering!
Hardware and Software Versions
The following hardware and software modification indices are prerequisites for successful modification:
Servo Board:
1.630.051.
85/86
Main Board:
1.630.052.
22/23/24
Servo Software .23 (IC33):
1.630.066.
23
/49/90
Control Software .23 (IC3):
1.630.065.
23
/08/92
For Servo Boards 1.630.051.
84
and lower, the Service Kit 1.630.060.00 must be installed in addition (Servo
Board 1.630.051.86 is part of this Service Kit). If the abovementioned assemblies have lower modification in-
dices (the part of the order no. printed in bold characters), the A730 CD Player must be updated before.
If yellow wrap wires are installed on the Main Board, then the Board has the correct modification status for a
successful upgrade according to the “Main Board Modification” paragraph. Should this not be the case,
please use the “Hardw. Mod. Kit A730” 20.010.730.03 for the modification instead of the Service Kit
1.630.060.00. The Servo Board 1.630.051.86 is contained in this kit, too.
Preparation, Modification
•
Unplug the unit from the mains.
•
Open the unit by carefully removing the front (operating) panel by means of unscrewing the six Allen screws
accessible from the bottom side. The complete front panel with the drive can then be flipped-over to the left
and placed onto your workbench next to the bottom part of the CD player. Now you see the Servo Board in-
stalled at the rear of the CD drive.
•
Unplug the two flat ribbon cables from the Main Board and the black ground wire to the housing. Put the
bottom part of the CD player aside. Unplug all connectors and flex PCBs (after having opened the locks on
the flex PCB connectors) from the Servo Board.
•
Remove both tension springs between the die-cast frame and the CD drive. Put them aside for later use.
•
Remove the Servo Board and its mounting brackets from the chassis. Put the four lock washers aside for
later use. Unscrew the special screws with rubber dampers from the front panel. Now the complete CD drive
can be removed.
•
Remove the microswitch from its mounting bracket (take care not to lose the small threaded part) and rein-
stall the microswitch in the same direction to the new mounting bracket (1.630.110.34) contained in the kit.
Exact positioning of the microswitch will be performed later. Now remove the “old” mounting bracket which is
fixed to the die-cast frame with two Allen screws. The new mounting bracket with the switch installed must be
fixed to the die-cast frame using the two 3.25 mm spacers between the bracket and the frame. Use two
screws M3×10 (21.53.0356) and the lock washers put aside before.
•
Microswitch adjustment: Slightly tighten the left screw in such a way that the switch can still be rotated
around this pivot. Adjust the switch so that the switching point is just before closing or opening the hinged
CD cover; the switching lever must never touch the switch body. When finished, carefully tighten both
screws.
•
The new CD drive has a mechanical transport lock. Before installing it, the two Allen screws (key no. 2.5) ac-
cessible through holes in the black plastic cover must be tightened (approx. 10 turns
clockwise
). Having
done this, the drive is ready for installation.
•
Installation of the new CD drive: The new drive is placed over the front panel opening and loosely fixed with
the four Allen screws put aside before, so that the drive frame still can be shifted.
