Sony HCD DX155, Sony HCD DX255 How to disassemble and reassemble the DVD mechanism, how to take out the disc when there is no power

Note on MAIN board replacement
New part of EEP ROM (IC1103) on the MAIN board cannot be used.
Therefore, if the mounted MAIN board (A-1151-985-A, etc.) is replaced, exchange new EEP ROM (IC1103) with that used before the replacement.

When displaying the version number on the screen
When you turn on the system, the version number [VER.X.XX] (X is a number) may appear on the screen. Although this is not a malfunction and for Sony service use only, normal system operation will not be possible.
Turn off the system, and then turn on the system again to operate.

When the self-diagnosis function is activated to prevent the system from malfunctioning, a 5- character service number (e.g., C 13 50) with a combination of a letter and 4 digits appears on the screen and the front panel display.

C 13: The disc is dirty.
Clean the disc with a soft cloth.

C 31: The disc is not inserted correctly.
Restart the system, then re-insert the disc correctly.

E XX (xx is a number): To prevent a malfunction, the system has performed the selfdiagnosis function.

Contact your nearest Sony dealer or local authorized Sony service facility and give the 5- character service number.
Example: E 61 10

The laser beam on this model is concentrated so as to be focused on the disc reflective surface by the objective lens in the optical pickup block. Therefore, when checking the laser diode emission,
observe from more than 30 cm away from the objective lens.

LASER DIODE AND FOCUS SEARCH
1. Open the cover and turn POWER on with no disc inserted.
2. Confirm that the following operation is performed while observing the objecting lens.
1)Confirm that laser beam is spread.
2)Up and down motion of the objective lens. (3 times)

DISC TRAY LOCK
The disc tray lock function for the antitheft of an demonstration disc in the store is equipped.
Setting Procedure :
1. Press the Power button to turn the set on.
2. Press the [FUNCTION] button to set DVD function.
3. Insert a disc.
4. Press the Stop button and the Eject  button simultaneously for five seconds.
5. The message “LOCKED” is displayed and the tray is locked.
Releasing Procedure :
1. Press the Stop button and the Eject  button simultaneously for five seconds again.
2. The message “UNLOCKED” is displayed and the tray is unlocked.

 When “LOCKED” is displayed, the tray lock is not released by turning power on/off with the Power button.

HOW TO OPEN THE DISC TABLE WHEN POWER SWITCH TURNS OFF

Fix the capacitors with adhesive agent as follows
Fixing the capacitors with adhesive agent is required by the safety regulation.
Be sure to fix the capacitors with adhesive agent when part or circuit board is replaced.

When installing a new op unit / precaution before unsoldering the static electricity prevention solder bridge

Be sure to connect the flexible printed circuit board first of all before removing the static electricity prevention solder bridge by unsoldering. Remove the static electricity prevention solder bridge by unsoldering after the flexible printed
circuit board has already been connected.
(Do not remove nor unsolder the solder bridge as long as the OP unit is kept standalone.)

Disassembly and reassembly of the DVD mechanism