Samsung HT-BD1255 Schematic

5.1CH Blu-ray
Home Theater System

Model Name : HT-BD1255
Model Code : HT-BD1255T/XAC

Speaker PS-BD1255

Front PS-FBD1255

Center PS-CBD1255

Rear PS-RBD1255

Subwoofer PS-WBD1255

SERVICE

Manual

5.1CH Blu-ray Home Theater System

HT-BD1255

CONTENTS

1. Precaution

2. Product Specification

3. Disassembly & Reassembly

4. Troubleshooting

5. Exploded View & Part List

6. PCB Diagram

7. Schematic Diagram

Refer to the service manual in the GSPN (see the rear cover) for the more information.

GSPN (Global Service Partner Network)

Area Web Site

North America service.samsungportal.com
Latin America latin.samsungportal.com
CIS cis.samsungportal.com
Europe europe.samsungportal.com
China china.samsungportal.com
Asia asia.samsungportal.com
Mideast & Africa mea.samsungportal.com

This Service Manual is a property of Samsung Electronics
Co.,Ltd. Any unauthorized use of Manual can be punished
under applicable International and/or domestic law.

Samsung Electronics Co.,Ltd. Apr. 2009

©

Printed in Korea

Contents

1. Precaution

1-1 Safety Precautions ...........................................................................................1-1

1-2 Servicing Precautions ......................................................................................1-3

Precautions for Electrostatically Sensitive Devices (ESDs) .............................1-4

1-3

2. Product Specification

2-1 Product Feature ...............................................................................................2-1

2-2 Specifications ...................................................................................................2-2

Specifications Analysis .....................................................................................2-8

2-3

Accessories ......................................................................................................2-10

2-4

3. Disassembly & Reassembly

3-1 Overall Disassembly & Reassembly ................................................................3-1

3-2 DECK Disassembly & Reassembly..................................................................3-4

4. Troubleshooting

4-1 Checkpoints by Error Mode..............................................................................4-2

4-2 Initialization & Upgrade Methods .....................................................................4-34

Buyer-Region Code Setting Method ................................................................4-38

4-3

5. Exploded View & Part List

5-1 Product Exploded View ....................................................................................5-2

5-2 DECK Exploded View ......................................................................................5-4

Speaker System ...............................................................................................5-6

5-3

Electrical Part List ............................................................................................5-7

5-4

Contents

6. PCB Diagram

6-1 Wiring Diagram ................................................................................................6-2

6-2 FRONT PCB Top ..............................................................................................6-3

FRONT PCB Bottom ........................................................................................6-5

6-3

KEY PCB Top ...................................................................................................6-6

6-4

KEY PCB Bottom .............................................................................................6-8

6-5

AMP PCB Top ..................................................................................................6-9

6-6

AMP PCB Bottom .............................................................................................6-11

6-7

MAIN PCB Top .................................................................................................6-13

6-8

MAIN PCB Bottom ...........................................................................................6-16

6-9

SMPS PCB Top ................................................................................................6-18

6-10

1 SMPS PCB Bottom ..........................................................................................6-19

6-1

7. Schematic Diagram

7-1 Overall Block Diagram .....................................................................................7-2

7-2 FRONT .............................................................................................................7-3

KEY ..................................................................................................................7-4

7-3

AMP .................................................................................................................7-5

7-4

AUDIO / VIDEO (COMPONENT, COMPOSITE) ..............................................7-6

7-5

HDMI CEC / TX (SIL9134) ...............................................................................7-7

7-6

Boot Strap Option.............................................................................................7-8

7-7

EBI ADDR, EBI DATA .......................................................................................7-9

7-8

CLOCK, BBS....................................................................................................7-10

7-9

BCM7440 POWER...........................................................................................7-11

7-10

1 DDR2 BANK0, BANK1 .....................................................................................7-12

7-1

SYSTEM MICOM / TUNER / SRC / WIRELESS .............................................7-13

7-12

EXTERNAL IN & AUDIO FLOW .......................................................................7-14

7-13

Ethernet, S-ATA, USB ......................................................................................7-15

7-14

GPIO / IPOD / BT .............................................................................................7-16

7-15

NAND, FlexOneNand .......................................................................................7-17

7-16

MAIN POWER..................................................................................................7-18

7-17

DSP SDRAM / FLASH .....................................................................................7-19

7-18

BCM7620 (F/E) ................................................................................................7-20

7-19

SMPS (110V) ...................................................................................................7-21

7-20

SMPS (220V) ...................................................................................................7-22

7-21

2. Product Specification

2-1 Product Feature

 New features for both HT-BD1250

- BD-LIVE from the beginning of the Mass Production

- DTS-HD Master Audio decoding from the beginning of the Mass Production

- Wireless Network

• Bundle ‘Wireless LAN adapter’ not included for HT-BD1250

- MP3, JPG

- 2 USB port (Not only on rear, but also on front)

- I-POD Docking (Only USA)

- Various Video Setups

• Progressive Mode

• Still Mode

• BD Wise

• Picture Control

Product Specification

 HT-BD2→HT-BD1250

- DivX (Only EU)

- PC Connected

- USB HOST

- Profile 2.0 Ready

- Netflix, Pandora

- I-POD Docking (Only USA)

- Wireless Rear Speaker

Samsung Electronics 2-1

Product Specification

2-2 Specifications

2-2-1

HT-BD1250/HT-BD1252/HT-BD1255Specications

 Basic Specification

Power Consumption 85 W
Weight 4.4 Kg

GENERAL

DISC

Dimensions 440 (W) x 345 (D) x 63 (H) mm
Operating Temperature Range +5°C ~ +35°C
Operating
BD

(Blu-ray Disc) Reading Speed: 4.917m/sec

DVD

(Digital Versatile Disc)

12 cm

CD:
(COMPACT DISC)

8 cm

CD:
(COMPACT DISC)

Humidity Range 10% to 75%

Reading Speed: 3.49 ~ 4.06 m/sec.
Approx. Play Time (Single Sided, Single Layer Disc):

135 min.
Reading Speed: 4.8 ~ 5.6 m/sec.
Maximum Play Time: 74 min.
Reading Speed: 4.8 ~ 5.6 m/sec.
Maximum Play Time: 20 min.

VIDEO

OUTPUT

VIDEO/

AUDIO

AMPLIFIER

1 channel: 1.0 Vp-p (75Ω load)

Composite

Component

HDMI

Front
Center
Surround
Subwoofer

Frequency

Video

Video

speaker output 165W x 2 (3Ω)

speaker output 170W (3Ω)

speaker output 165W x 2 (3Ω)

speaker output 170W (3Ω)

range

Blu-ray Disc: 576i (480i)
DVD: 576i (480i)

Y: 1.0 Vp-p (75Ω load)

Pr: 0.70 Vp-p (75Ω load)

Pb: 0.70 Vp-p (75Ω load)

Blu-ray Disc: 1080i, 720p, 576p (480p), 576i (480i)
DVD: 576p (480p), 480i

1080p, 1080i, 720p, 576p (480p)
PCM multi channel audio, Bit stream audio, PCM audio

Analog input: 20Hz ~ 20kHz (±3dB)
Digital input: 20Hz ~ 44kHz (±3dB)

Ratio 70dB

S/N
Channel
Input

2-2 Samsung Electronics

separation 60dB

sensitivity (AUX) 500mV

 HT-BD1250 Speaker Specification

Product Specification

Speaker system

Impedance

Frequency range

Output sound pressure level

SPEAKER

Rated input
Maximum input

Dimensions (W x H x D)

Weights

 HT-BD1252 Speaker Specification

Speaker system

5.1ch Speaker System

Front Surround Center Subwoofer

3Ω 3Ω 3Ω 3Ω

140Hz ~

50KHz

87dB/W/M 87dB/W/M 87dB/W/M 90dB/W/M

165W 165W 170W 170W
330W 330W 340W 340W

Front/Surround: 100.5 x 210 x 99 mm
Centre: 300 x 59 x 50 mm
Subwoofer: 201 x 403 x 410 mm

Front/Surround: 0.70 Kg, Centre: 0.33 Kg
Subwoofer: 5.39 Kg

Front Surround Center Subwoofer

140Hz ~

20KHz

5.1ch Speaker System

140Hz ~

20KHz

40Hz ~

160Hz

SPEAKER

Impedance

Frequency range

Output sound pressure level
Rated input
Maximum input

Dimensions (W x H x D)

Weights

3Ω 3Ω 3Ω 3Ω

140Hz ~

20KHz

87dB/W/M 87dB/W/M 87dB/W/M 88dB/W/M

165W 165W 170W 170W
330W 330W 340W 340W

Front : 260 x 1120x 260 mm
Surround : 100 x 151 x 89 mm
Centre : 300 x 59 x 50 mm
Subwoofer : 201 x 403 x 410 mm

Front: 2.18 Kg, Surround: 0.42 Kg
Centre: 0.32 Kg, Subwoofer: 5.39 Kg

140Hz ~

20KHz

140Hz ~

20KHz

40Hz ~

160Hz

Samsung Electronics 2-3

Product Specification

 HT-BD1255 Speaker Specification

SPEAKER

Speaker system

Impedance

Frequency range

Output sound pressure level
Rated input
Maximum input

Dimensions (W x H x D)

Weights

5.1ch Speaker System

Front Surround Center Subwoofer

3Ω 3Ω 3Ω 3Ω

140Hz ~

50KHz

140Hz ~

20KHz

140Hz ~

20KHz

40Hz ~

160Hz

87dB/W/M 87dB/W/M 87dB/W/M 88dB/W/M

165W 165W 170W 170W
330W 330W 340W 340W

Front/Surround: 260 x 1202 x 260 mm
Centre: 300 x 59 x 50 mm
Subwoofer: 201 x 403 x 410 mm

Front/Surround: 2.88 Kg,
Centre: 0.34 Kg, Subwoofer: 5.39 Kg

2-4 Samsung Electronics

Product Specification

2-2-2

HT-BD1220Specications

 Basic Specification

Power Consumption 85 W
Weight 4.4 Kg

GENERAL

TUNER

FM

DISC

Dimensions 440 (W) x 345 (D) x 63 (H) mm
Operating Temperature Range +5°C ~ +35°C
Operating
FM Frequency Range 87.5 ~ 108.0 MHz

/ noise ratio 60 dB

Signal
Usable
T
BD

DVD

CD:
(COMPACT DISC)

sensitivity 10 dB

otal harmonic distortion 1 %

(Blu-ray Disc) Reading Speed: 4.917m/sec

(Digital Versatile Disc)

12 cm

Humidity Range 10% to 75%

Reading Speed: 3.49 ~ 4.06 m/sec.
Approx. Play Time (Single Sided, Single Layer Disc):

135 min.
Reading Speed: 4.8 ~ 5.6 m/sec.
Maximum Play Time: 74 min.

VIDEO

OUTPUT

VIDEO/

AUDIO

AMPLIFIER

8 cm

CD:
(COMPACT DISC)

Composite

Component

HDMI

Front
Center

Frequency

Video

Video

speaker output 165W x 2 (3Ω)

speaker output 170W (3Ω)

range

Reading Speed: 4.8 ~ 5.6 m/sec.
Maximum Play Time: 20 min.

1 channel: 1.0 Vp-p (75Ω load)

Blu-ray Disc: 576i/480i
DVD: 576i/480i

Y: 1.0 Vp-p (75Ω load)

Pr: 0.70 Vp-p (75Ω load)

Pb: 0.70 Vp-p (75Ω load)

Blu-ray Disc: 1080i, 720p, 576p/480p, 576i/480i
DVD: 576p/480p, 576i/480i

1080p, 1080i, 720p, 576p/480p
PCM multi channel audio, Bit stream audio, PCM audio

Analog input: 20Hz ~ 20kHz (±3dB)
Digital input: 20Hz ~ 44kHz (±3dB)

Ratio 70dB

S/N
Channel
Input

Samsung Electronics 2-5

separation 60dB

sensitivity (AUX) 500mV

Product Specification

 HT-BD1220 Speaker Specification

SPEAKER

Speaker system

Impedance
Frequency range
Output sound pressure level
Rated input
Maximum input

Dimensions (W x H x D)

Weights

2.1ch Speaker System

Front Subwoofer

3Ω 3Ω

140Hz ~ 50KHz 40Hz ~ 160Hz

87dB/W/M 90dB/W/M

165W 170W
330W 340W

Front: 100.5 x 210 x 99 mm
Subwoofer: 201 x 403 x 410 mm

Front: 0.70 Kg
Subwoofer: 5.39 Kg

2-6 Samsung Electronics

2-2-3 Video Output SPEC

 BD playback

Product Specification

Output

Setup

1080P@60F 1080P@60F 480i 1080i 480i

1080P@24F 1080P@24F 480i 1080i 480i

1080i 1080i 1080i 1080i 480i

720P 720P 720P 720P 480i
480P 480P 480P 480P 480i

480i 480P 480i 480i 480i

HDMI Output

Component

[HDMI

Connected]

Component

[HDMI not

Connected]

CVBS Output Remark

 DVD playback

Setup

Output

HDMI Output

Component

[HDMI

Connected]

Component

[HDMI not

Connected]

CVBS Output Remark

Only when

source is

1080P@24F

1080P@60F 1080P@60F 480i 480P 480i

1080i 1080i 480i 480P 480i

720P 720P 480i 480P 480i
480P 480P 480i 480P 480i

480i 480P 480i 480i 480i

Samsung Electronics 2-7

Product Specification

2-3 Specifications Analysis

Model Name HT-BD1250 HT-BD2

Photo

Profile Blu-ray 2.0 from the beginning Blu-ray 1.0

HDMI

DVD, CD

JPG

MP3,

HOST

USB

I-POD  (only USA) X

ireless LAN

W

(SD)  (only EU) X

DivX
ireless Rear

W

Memory
BD-RE
Update

Required

Slot X (External USB support) X

support Support 1.0 Does not support 1.0

Method CD, Network, USB CD, Network

time for update 3~4min 10~12 min

Remote long long

HDMI 1.3 1.3

24frame

1080p

(Anynet+)

CEC

Color X (8bit) X (8bit)

Deep
xvYCC

 

 







 

 



X

X

X

X

Video

Audio Transmission

HD

Quality control

Picture

V

ideo Processor Main SOC Internal Scaler Main SOC Internal Scaler

1080p

60frame

60frame

1080i

24frame

1080p

video output for

480i/p
Blu-ray

Simultaneous
Output between HDMI/
Component/CVBS

Video

(Progressive Mode, Still Mode,

BD Wise, Picture Control)

 



X

 

 

 

 

 

 : application, X: non-application

2-8 Samsung Electronics

Product Specification

Model Name HT-BD1250 HT-BD2

Photo

Video

Resolution

Default

Audio

Factory
When

which has correct EDID
When

TV which has incorrect
EDID

Remark

DD
Dolby
dts
dts-HD
Re-encoding  (into dts) X

HD
output on HDMI 1.3

SMPS 2 trans 2 trans

Default 480p 480p

connected the TV

connected the

Plus decoding

TrueHD decoding

HD HRA decoding

MA decoding

audio bit stream

Maximum resolution for TV input Maximum resolution for TV input

480p 480p

HT-BD1250 can also output 480i/480p

resolution with Blu-ray Disc

 

 



(dts-HD Master Audio essential)

dts-HD MA Essential

dts-HD HRA

TrueHD

DD+

HT-BD2 can also output 480i/480p

resolution with Blu-ray Disc





dts-HD MA

dts-HD HRA

TrueHD

DD+

H/W

Deck Draw type Plastic Cover Slot-In
Pick

Up 5G VE Pickup 4G VE Pickup

Micom SANYO SANYO

Front

↔Loader One Board P-ATA

Main

 : application, X: non-application

Samsung Electronics 2-9

Product Specification

2-4 Accessories

2-4-1 Supplied Accessories

Accessories Item Item code Remark

Remote Control

Battery

HDMI Cable AH39-00923A

Audio Cable AH39-40001V

FM Antenna AH42-00021A

User’s Manual

AH59-02144K

4301-000116

AH68-02178S

AH68-02183M

Samsung Service Center

Cloth Clean AH81-02286C

2-10 Samsung Electronics

6. PCB Diagram

6-1 Wiring Diagram.................................................................................................6-2

6-2 FRONT PCB Top ............................................................................................... 6-3

PCB Diagram

6-3
6-4
6-5
6-6
6-7
6-8
6-9
6-10
6-1

FRONT PCB Bottom ........................................................................................6-5

KEY PCB Top .................................................................................................... 6-6

KEY PCB Bottom ..............................................................................................6-8

AMP PCB Top ...................................................................................................6-9

AMP PCB Bottom .............................................................................................6-11

MAIN PCB Top .................................................................................................. 6-13

MAIN PCB Bottom ............................................................................................6-16

SMPS PCB Top ................................................................................................. 6-18

1 SMPS PCB Bottom ...........................................................................................6-19

Samsung Electronics 6-1

PCB Diagram

1 SW3
2 LDO+ 1 ST 5.4V
3 LDO- 2 ST 5.4V
4 CLOSE 3 ST 5.4V
5 OPEN 4 GND
6 GND 5 GND
7 W 6 GND
8 V 7 D5.4V

9 U 8 D5.4V
10 GND 9 D5.4V
11 H+ 10 GND
12 HU+ 11 GND
13 HU- 12 GND
14 HW+ 13 FE 12V
15 HW- 14 FE 12V
16 H- 15 FE GND
17 HV- 16 FE GND
18 HV+ 17 NC
19 SLD2+ 18 POWER_ON
20 SLD2- 19 NC
21 SLD1+ 20 DGND
22 SLD1- 21 VFD +4.6V

22 VFD -4.6V
23 -34V

24 DGND

1 AGND

2 +12V

1 5V 3 AGND

2 SA_INT 4 -5V
3 SAOUT2+ 5 +35V
4 SAOUT1+ 1 6 +35V
5 SAOUT1- 2 7 +35V
6 SAOUT2- 3 AVGND 8 GND
7 GND 4 MIC_PDN 9 GND
8 CDLD 5 SD(POWER) 10 -35V
9 CDVR 6 RESET(POWER) 11 -35V

10

DVDCDMPD 7 12 -35V

11 DVDVR 8 AUOUT3
12 DVDLD 9 AUOUT2
13 TEMP 10 AUOUT1
14 VDMPD 11 LRCKOUT
15 GND 12 BCLKOUT
16 BDSLEEP 13 GND
17 GAINSW 14 GND
18 VREFB 15 AV 3.3V
19 VREFB 16 DS 5V

20 5V 17 EXT_MUTE(PWM)

21 RFID 18 RESET(PWM)
22 RFIN 19 SO(PWM)
23 GG 20 CS(PWM)
24 HH 21 SCK(PWM)
25 EE

22 SI(PWM)
26 FF 23 SW_MUTE
27 DD 24 FAN_PWR
28 CC 25 FAN_SEN
29 BB 26 MIC
30 AA 27 AL 5.4V
31 GND 28 AVGND
32 TD­33 FD­34 TILT­35 TILT+
36 FD+
37 TD+ 1 UART_BT_RX
38 GND 2 UART_BT_TX
39 BDLD 3 MIC_SENSE 1 POWER_ON
40 BDHFM 4 VFD_FU_CLK 2 DGND

5 VFD_FU_DATA 3 KEY
6 VFD_CE 4 + 5.6V
7 GND

8 SMPS_VFD(+4.6V)

9 VFD 4.6V(-)
10 SMPS_VFD -34V

11 GND

12 AL 5.4V

13 MIC_DATA
14 POWER_LED
15
16 MIC_CLK 1 5V

TNI_YEK2YEK1_HCUOT_REWOP71
18 3 KEY_SDA
19 BTRST 4 KEY_SCL
20 BUZZER 5 KEY_RESET
21 GND 6 D_GND
22 VOL_DOWN
23 VOL_UP
24 TC_SDA
25 TOUCH_CLK
26 TOUCHRST
27 TOUCH_INT
28 GND

(TCON1)

FUNTION

(PCON1)

POWER

FRONT

(SCN2

)

MAIN

POWER(J3)

LOADER1

(DJ3)

AMP

(CON12)

(PCN1

)

DECK ASSY

SMPS

6-1 Wiring Diagram

6-2 Samsung Electronics

6-2 FRONT PCB Top

IJK

IJK

VCON1

BCON1

MMIC1

UIC2

UCON1

TCON1

IC1

PCON1

FCON1

1 2

PCB Diagram

TP4

Samsung Electronics 6-3