MARANTZ DR4050
Manual de Servicio

GB 28
5.4.2

5.
5.5.1 Description

Requirements to perform the test Working keyboard to cycle through the tests and to start up the test. Working local display to check the output messages.

5.4.3

Description of the tests

Focus control test The focussing lens is continuously moving up and down. The display reads "BUSY". Sledge control test After pressing [F FWD] the sledge continuously moves up and down. Pressing [REWIND] stops the sledge at the position it is in and the focus control test resumes. The display reads
"BUSY".

This test is initiated by pressing [ERASE] and [RECORD] simultaneously while switching on the unit. The player will erase a complete CD-RW disc (including PMA and ATIP lead out area) at speed N=2. The display shows the countdown of the remaining time required for the operation to complete. The format is "ER mm:ss", where "mm" are the remaining minutes and "ss" the remaining seconds. After completion the message "PASSED" is shown, and the player has to be switched off and on again to start up in normal operating mode. Switching off the unit before completion of the test, leaves the disc in an unpredictable state. In such case only a complete DC-erase procedure can recover the CD-RW disc. 5.5.2 Requirements to perform the test Functional CDR player. A CD-RW audio disc must be present in the tray.

Tray control test This test starts from within the focus control test routine. Pressing [OPEN/CLOSE] moves the tray in or out. In the tray open position one can initiate focus and sledge tests by pressing [F FWD]. One has to stop these tests pressing [REWIND] before it is possible to close the tray again. Depending on the action the display reads "OPEN", "OPENED", "CLOSE" or "BUSY".

5.5

DC-erase service mode

DC ERASE SERVICE MODE
(erasement of complete CD-RW)

Load CD-RW disc Press <ERASE> + <RECORD> simultaneously and switch ON unit

Display shows: �ER mm:ss�

mm ss

:remaining minutes :remaining seconds

TOTAL and REM are also illuminated

Display shows: �PASSED� when the erase function is completed �ERROR� if DC ERASE fails

To end test, switch OFF unit
CL96532086_027.eps 080999

Figure 5-4