What Is Service Program; Required Measuring Implement; Contents Of Service Program - Denon DN-D4500 Service Manual

SERVICE PROGRAM

What is Service Program

Service program is a special program intended for confirming servo functions etc.

Required Measuring Implement

Reference disc (TCD784 or CO-74176)

1. Contents of Service Program

Turn on the power while pressing both "BEND+" button of CD1 and "OPEN/CLOSE" button of CD2 to set the service mode. The
various check items can be selected with the TRACK SELECT knob, the various test items can be selected with the A1, A2, EXIT/
RELOOP and BEND-, CUE buttons. Press either the TRACK SELECT knob or PLAY/PAUSE button to start the check or test and
display the result.
To eject the disc, press the OPEN/CLOSE button.
To cancel the service mode, turn the power off.
Process No.
Function
(TRACK
(Character-display)
Indication)
A TRACK SELECT knob is pushed and a version is checked.
µcom Version check 1. System µcom version No. : "Sys_XXXX"
01
(Version No.) 2. DSP soft version No. : "Dsp_XXXX"
3. RC µcom version No. : "Rc_XXXX"
Press the TRACK SELECT knob to turn the tracking servo off.
"TR_Signal"
02
When the tracking servo is off, press the TRACK SELECT knob to turn the track-
"HF_Signal"
ing servo on.
Press the TRACK SELECT knob to start automatic servo adjustment. When the
adjustment is completed, the adjustment data is displayed. The data can be
selected by turning the JOG dial.
1. Disc check, CD/CD-RW
2. Focus gain data
Automatic Servo
3. Focus balance data
Adjustment call
03
4. Focus offset data
(Servo Data)
5. Tracking gain data
6. Tracking balance data
7. Tracking offset data
8. S curve maximum
9. S curve minimum
TRACK
Select the focus gain. Default : 7. Select the data with the JOG dial, then press the
SELECT
TRACK SELECT knob to enter it. The higher the value, the higher the gain, while
knob
04 "Fo_Gain"
the lower the value, the lower the gain.
* Do not change this without instruction from engineering.
05 "Tr_Gain" Select the tracking gain. Default : 2. The operation is the same as for the Fo Gain.
06 "BER" The block error rate is displayed.
When the TRACK SELECT knob is pressed, the pickup moves towards the outer
edge of the disc. The pickup lens becomes visible through the slit in the CD mech-
07 "PU._Clean"
anism plate. The lens can be cleaned using a cotton swab, etc.
(Perform this operation with the top panel/cover removed and the disc ejected.)
During normal operation, the error code for the error that occurred is displayed.
Turn the JOG dial to select up to 10 sets of error data stored in the memory. (See
Error Code Check
08 the error code table for a description of the error codes.)
(Error Data)
Press the TRACK SELECT knob to set the error data clear mode. ("Err Clear?"
is displayed.) Press the TRACK SELECT knob again to clear all the error data.
The total operating time of the spindle motor is displayed. A total of 65,535 hours
can be counted, in units of hours.
Total Running Time
NOTE: If the power is turned off after 59 minutes or less, that hour is not counted.
09
(Total Time)
Press the TRACK SELECT knob to set the total time clear mode. ("Time Clear?"
is displayed.) Press the TRACK SELECT knob again to clear the total time.
Contents
8
DN-D4500