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The servo circuit of this model is designed to be adjustment-free and the adjustment value and disc distinction (CA-DA, CD-R and CD-RW etc.) is
adjusted by within the IC. Therefore the adjustment is performed by each TOC reading. The adjustment conditions within the IC of each servo can be
monitored in this test mode.
1. How to start the Test Mode
Starting method of the test mode differ depending upon the type of disc being used. This is because the adjustment values of each servo also
differ depending upon the type of disc.
(1) Starting method from external
1) Insert a CD or CD-R/RW disc and press PLAY button.
2) Press the BAND button more than 3 seconds, while continuously pressing the P-MODE button.
3) Press the BAND button again when all lights are lit.
4) Press the PLAY button when the tuner is displayed. (the test mode starts)
* If the CD-RW is used, press the STOP button after 4), and select CD-R by the DSL button. Then press the PLAY button again.
(2) Starting method by using the TEST LAND.
When using the CD-DA or CD-R
1) Short-circuit the test land and the OPEN/CLOSE SW land.
2) Insert the AC plug and install the CD-DA or CD-R disc.
3) Press the PLAY and STOP buttons in this sequence and read the TOC.
4) Press the DISPLAY/ENTER button and confirm that all LCD light up. (In this case all lights of LCD will be lit flickly.)
When using the CD-RW
1) Short-circuit the test land and the OPEN/CLOSE SW land.
2) Insert the AC plug and install the CD-RW disc.
3) Press the PLAY, STOP and DSL buttons in this sequence and read the TOC. The LCD display should display CD-r at this point.
4) Press the DISPLAY/ENTER button and confirm that all LCD light up.
Note 1) If the TOC cannot be read, press the DISPLAY/ENTER button once “Err” has appeared on the LCD, causing all the LCDs to
become lit up. (In this case all lights of LCD will be lit flickly.)
The following steps 2 and 3 can be confirmed even if the TOC cannot be read.
Note 2) By repeatedly pressing the DISPLAY/ENTER button, all LCD will light up and the TOC display will be repeated.
Note 3) By repeatedly pressing the DSL button, the “CD-d” and “CD-r” displays will be repeated.
When the LCD displays “CD-d,” , CD-DA, CD-R is selected.
When the LCD displays “CD-r,” , CD-RW is selected.
Note 4) The test mode is cancelled by disconnecting the AC plug and removing the soldering of short land.
2. DISC distinction (confirmation of FE waveform)
This mode is possible to perform a confirmation of the disc distinction.
Confirmation method
1)
Press the DSL button and select “CD-d” or “CD-r” (Refer to Note 3).
2)
Install the disc.
3)
Press the MODE button.
The LCD will change as follows.
Example: Test disc: TCD-782, DISC type select: CD-d, Judgement value: 7F, Measurement value: 3D BE.
Measurement value
*All numerical values are displayed in HEX
What disc the IC has selected can be understood according to this judgment value.
The decision standard of IC is as follow.
LCD displays “CD-d”
LCD displays “CD-r”
0 < Judgment value < 10
No disc
No disc
10 < Judgment value < 32
CD-RW
No disc
32 < Judgment value < C8
CD-DA and CD-R
CD-RW
C8 < Judgment value
CD-DA and CD-R
The state of the FE waveform can also be understood from this judgment value.
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