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5-2-4. DRIVE FUNCTION CHECK
Since CDM-56 models is adjustment-free drive, there is no potenti-
ometer fo electrical adjustment in the MA-C30 Mounted Board.
Therefore BU or MA Mounted Board can be swapped over without
any manual adjustment so that you will easily find defective com-
ponents (if the trouble depends on BU or MA Mounted Board).
(Refer to 5-2-4-2.)
Note: All of adjustment items, will be automatically performed af-
ter power-on by the function of CD DSP IC.
The page 23 shows the sequence of execution items in Power-
On Reset Actions. It will help you finding any defective point
on the drive to know the specified processing sequence of the
auto adjustment items and drive's action in the Power-On Re-
set Actions.
Preparing
The following tools and measuring equipments are necessary for
performing this section.
Oscilloscope
Sony Test Disc (YEDS-18)
44
5-2-4-1. Pre-Setting for Test Mode Operation
Note: This section is performed only specified following sections.
Note: This section describes usages of Test Mode Operation and
(3-702-101-01)
a. Set the COMMAND SW on the back panel as below.
b. While pressing the TEST button of the controller, turn on the
power of the CDJ-C50S.
d. About 1 second later, release the TEST button.
Note: Even if drive is Test Mode, OPEN button is activated.
signal checking on the CDM-56 drives with the with the
COMMAND SW on the back panel and the TEST button
(MAIN board).
SCSI TERM
MODE
S707
ON
OFF
ID2 ID1 ID0
SW601
ID2
ID1
ID0
PARITY
ON
OFF
ON
ON
S706
PARITY
TEST
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