Samsung HT- BD1255 5.1CH Blu-ray Home Theater System Disassembly, firmware update, region code setting and SMPS schematics for 110 and 220 volts

DECK Disassembly & Reassembly

Ass'y Cover

1) Remove 4 Screws 1.
2) Lift up the Ass’y Cover 2 in direction of arrow.

Tray Disc

1) Insert a Screw Driver into Hole 1 and rotate Tray Gear 2 in the direction arrow
“Open”.
2) When the Tray Disc 3 Comes out a little, pull it in the direction arrow “A” by hand.
3) Pull the Tray Disc 3 to disassemble, while simultaneously pushing 2 Stoppers
4 (left, right) in the direction arrow “B”, “C”.

Ass'y P/U:  Deck

1) Remove FFC Cable 1, 2, 3.
2) Remove 4 Screws 4 from the Ass’y P/U Deck 5 and lift it up.

Ass'y Pick Up

1) Remove 1 Screw 1 from the Ass’y Hinge PU 2 and lift it up.
2) Pull Bracket Shaft PU 3 in the Direction of Arrow “A” and Remove Bracket Shaft
PU 3.
3) Lift Up Shaft P/U 4 and Remove the Ass’y Pick Up 5

1)Insert the Shaft P/U 2, 3 into the Ass’y pick up 1.
2) Assemble Bracket Shaft PU 4.
3) Insert the Ass’y Hinge PU 6 Assemble 1 Screw 5

1.Insert update CD and close the tray

2. Tray will be opened.
3. Press Yes.

(If the update CD you inserted is a later one than Current Version)

4. Get rid off updare CD from Disk Tray.

5. wait about two to three minutes.

6 when finished, power automatically goes off.

Firmware update via network procedure

 F/W Update by USB

1. Insert the USB on the rear panel.

2. Press Yes.  (If USB you inserted has a later one than current version)

4.  wait about 2 to three minutes.

2. 5. When Finished, power automatically goes off

Cold Start Method (Initialize Setup)

This is useful for forgotten Parental Lock password.
2. Press ►| on the front panel for over 5 seconds while ‘no disc’ status.
3. Then, VFD sign: ‘COLD START’
4. System Micom Cold Start
: During Stand-By, just press  on the front panel for
over 5 seconds. Then, Red LED will go out and go on.

Buyer region code setting mehod.

The inserting region code method after replacing the Main PCB

Press the AUX button on the remote control.

Press the Marker button on the remote controller during 4 to 5 seconds.

After step (2), you can see “T-MODE” on the VFD and press
direction button “▼” during T-MODE.
Please remind that “T-MODE” indicator on the VFD is appeared for
a very short time.

After step (3), you can see “TEST - -” on the VFD.
Insert number “3”, “3” to select Region Code.

After step (4), you can see “- -” on the VFD.
Insert the Region Code (Below table) corresponding model with
“0 ~ 9” buttons on the remote control.

After step (5), you can see “00 USA” on the VFD.
It means that currently System Micom (MUIC1) program is installed by USA specification

Turn the Power off.

SMPS CIRCUIT DIAGRAM for 110 volt

SMPS CIRCUIT DIAGRAM FOR 220 Volt