Table of Contents
Advertisement
SECTION 4
TEST MODE
• AGING MODE
1. How to Enter AGING Mode
1) Insert a disc into the CD player.
(Multiple discs can be inserted *1)
2) With the set turned on, press
[ ]
§
and
(CD2) button simultaneously, and the AGING mode
is set.
(*1): The AGING mode is active only to the trays where discs
exist.
2. How to Exit from AGING Mode
Turn off the Power, and normal operation becomes ready.
3. Operation sequence in AGING Mode
An example of operation sequence where discs exist at CD1
and CD3 is shown below.
1) Tray 1 open/close
2) Tray 3 open/close
3) CD1 TOC read
4) CD1 last track search
5) CD3 TOC read
6) CD3 last track search
Hence, 1) – 6) are repeated.
[ ]
[CD3]
fl
button,
button,
– 13 –
SECTION 5
ELECTRICAL ADJUSTMENTS
Notes:
1. CD Block basically constructed to operated without adjustment.
Therefore, check eaech item in order given.
2. Use YEDS-18 disc (Part No.: 3-702-101-01) unless otherwise indi-
cated.
3. Use the oscilloscope with more than 10 MΩ impedance.
4. Clean an object lens by an applicator with neutral detergent when the
signal level is low than specified value with the following checks.
1. S-Curve CHECK
Connection:
BD board
TP (FEO)
TP (VC)
Procedure:
1. Connect the oscilloscope to TP (FEO) and TP (VC) on BD
board.
2. Connect the TP (FOK) and TP (GND) with lead wire.
3. Turned power switch on.
4. Put disc (YEDS-18) in and turned power switch on again and
actuate the focus search. (actuate the focus search when disc
table is moving in and out.)
5. Confirm that the oscilloscope waveform (S-curve) is symmetri-
cal between A and B. And confirm peak to peak level within
2.4 ± 0.7 Vp-p.
S-curve waveform
6. After check, remove the lead wire connected in step 2.
Note: • Try to measure several times to make sure that the ratio of A : B
or B : A is more than 10 : 7.
• Take sweep time as long as possible and light up the brightness to
obtain best waveform.
oscilloscope
+
–
symmetry
A
within 2.4 ± 0.7 Vp-p
B
Advertisement
Table of Contents
