Sony CDP-CX55, Service Manual

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Partially lit 1
A B C D E F G
CD1
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CD1
2nd
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PROGRAM 1
CD1
PROGRAM 1
FLUORESCENT INDICATOR TUBE AND LED CHECK
MODE
This mode is set by pressing the POWER button while pressing the
CHECK and PLUS ONE buttons in the power-off (standby) state.
The whole fluorescent indicator tube lights up, and the STANDBY,
MEGA CONTROL, PLUS ONE,
·
, and
P
LEDs light up.
This mode can be exited by pressing the POWER button.
SHIPMENT MODE
(Set to this mode when returning the unit to the
user.)
This mode is set by pressing the POWER button while pressing the
REPEAT and PLUS ONE buttons in the power-off (standby) state.
The power goes off automatically after the SRAM is all-erased and
the BD is opened (loading out state).
[ MAIN BOARD ] — CONDUCTOR SIDE —
IC501 IC201
CN702
CN704
AGING MODE
• Mode which repeatedly changes and plays back discs automati-
cally in the unit.
• It will repeat aging as long as no errors occur.
• If an error occurs during aging, it will stop all servos, motors, etc.
instantaneously, display the error number, and stop operations.
However, the stopping conditions differ according to whether the
unit is equipped with the “self-protection function during errors”
described later.
The function serves to maintain the state of the unit when errors
occur.
Sequence of Aging Mode
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Order of Disc Change
(1 cycle takes 3 minutes)
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1. No. 51
2. No. 20
3. No. 40
4. No. 30
5. No. 10
6. N0. 40*
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1. Disc change
2. Load in
3. TOC read
4. Access of last track
5. 3 second playback
6. Access of first track
7. 3 second playback
8. Load out
* DISC No. 40 chucks twice during one cycle.
To differentiate, the “ 2nd ” on the block indicator of the fluo-
rescent indicator tube will light up during the second chucking.
Special Functions in Aging Mode
There are some useful function in the aging mode.
• Disc setting mode*1
• Switching of use/disuse of protection function in errors *2
• Aging cycle count function *3
*1 Disc setting mode:
5 discs are set before setting the aging mode. This mode makes
the setting of these discs more easy.
*2 Switching of use/disuse of protection function in errors:
Function which voluntarily corrects errors which occur during
normal operations by retries.
If this function is not provided, all operations will be stopped
without retiring. It is suitable for checking errors with low re-
producibility.
If this function is provided, and errors can be corrected by re-
tries, aging will be continued without stopping.
(The normal aging should be performed with “be”.)
TP302 (ADJ)
TP303 (GND)
TP301 (AFADJ)
CD1
R505
R504