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TEST MODE
The servo circit of this model is designed to be adjustment-
free and the adjustment value and disc distinction (CDDA,
CD-R and CD-RW) etc. is adjusted by within the IC. There-
fore the adjustment is performed 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 adjust-
ment values of each servo also differ depending upon the
type of disc.
When using the CD-DA or CD-R
1) Short-circuit TEST LAND and OPEN/CLOSE SW
land.
2) Insert the AC plug to the power outlet and install the
CD-DA or CD-R disc.
3) Press the PLAY and STOP buttons in this sequence
and read the TOC.
When using the CD-RW
1) Short-circuit the TEST LAND and the OPEN/CLOSE
SW land.
2) Insert the AC plug to the power outlet and install the
CD-RW disc.
3) Pree the PLAY, STOP and DSL buttons in this sequence
and read the TOC. The LCD should display "CD-r" at
this point.
Note 1) If the TOC cannot read, "ERR" has appeared on the
LCD. The following step 2 and 3 can be verified
even if the "TOC" cannot be read.
Note 2) By repeatedly pressing the DISPLAY/ENTER but-
ton the all LCD light up and the "TOC" display are
repeated.
MAIN C.B
OPEN/CLOSE
SW SHORT LAND
14
MAIN C.B
GND
IC501
FE
VC
TE
IC401
RF
TEST LAND
61
IC301
Note 3) By repeatedly pressing the DSL button the LCD
"CD-r" and "CD-d" are repeated.
When the LCD displays "CD-d" ⇒
When the LCD displays "CD-r" ⇒
Note 4) The test mode is canceled by disconnect the AC
plug and remove the soldering of short land.
2. DISC distinction (confirmation of the 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, Judgment
value: 79, Measurement value: 44 CB
VOL
Judgment value
* All numerical value are displayed in HEX.
IC601
IC701
IC201
CD-DA, CD-R is selected.
CD-RW is selected.
Measurement value
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