Introducing Samsung DVD Recorder & VCR
( DVD-VR375 )
2008.2.
Samsung Electronics Co. LTD
Digital AV Division
☞ Samsung DVD Recorder & VCR
 General Introduction
 Model No : DVD-VR375
 Market Introduction Date
: APR 2008 (EU)
 Characteristics
1. Super picture & sound quality recording with MPEG-2(VBR) on DVD-RW, DVD-R
compatible with A/V & PC ( Playback only for DVD-RAM )
2. Convenient control through random accessibility of optical discs
- One touch recording : Automatic empty area recording
- Program Navigation
- High Speed Search and Play
3. Advanced playback functions for multiple purposes
(Compatible with DVD, Audio-CD, CD-R/RW(MP-3), DVD-R, DVD-RW Disc)
2
DVD-VR375 Playback & other Features
■ Progressive Scan
By scanning all 576 lines in one pass,
progressive scanning provides high vertical
resolution and flicker-free, high-density image
output that does not suffer from the loss of
quality during subject movement -- which is
characteristic of the conventional interlaced
scanning method.
30 Frame/Sec
60 Frame/Sec
■ Program Navigator
Recorded programs are shown as thumbnail pictures, and information such as title, recording
dates and times are displayed on menu screen. User can choose a desired program.
■ Editing
Simple non-linear editing is possible on menu screen without additional editing
system. User can delete part of a program or entire program, and edit program title.
3
DVD-VR375 Key Features
 Recording Features
■ MPEG-2 VBR(Variable Bit Rate) Recording
■ Creating a DVD video title using DVD-RW/DVD-R
■ Automated Quality Adjustment for Timer Recording
■ Copying data from a digital camcorder using a DV input jack
■ Selectable Recording Mode
 Playing Features
■ Progressive Scan both DVD and VCR modes
■ Program Navigation
 Other Features
■ Easy Editing
■ Quick Recording
■ Auto Chaptering
■ HDMI out /w up-scale
- Anynet+ (HDMI CEC), up to 1080P
4
’08 DVD Recorder New Features
Samsung’s Unique Features
EZ REC mode
1 sec Quick Recording
on All Format
L1200
Convenience
EZ REC Mode
(DVDR Like VCR)
Differential Features
-R Dual Layer Recording
DivX Playback
EVQ (Enhanced Video Quality)
L1200
DSlim
esign
& Deluxe
Design Identity
Dual Layer Recording ( only for -R disc)
1 dual layer disc is enough for 3hrs movie (SP mode)
Single Layer Disc
0.6 mm
0.6 mm
4.7GB
•
•
•
•
HQ (60min), HSP(90MIN)
SP (120MIN), LSP(150MIN)
ESP (180MIN), LP(240MIN)
EP (360MIN), SLP(480MIN)
•
•
•
•
HQ (108min), HSP(162MIN)
SP (217MIN), LSP(271MIN)
ESP (325MIN), LP(434MIN)
EP (651MIN), SLP(868MIN)
Dual Layer Disc
0.6 mm
0.6 mm
8.5GB
EVQ (Enhanced Video Quality)
 Video Noise Reduction
Reduce the pixel noise, produced during Digital signal processing
 False Color Reduction
False Color reduction filter reduces the cross color phenomenon produced by
in complemented separation of Y & C signal
Sharpness Enhance
EZ REC Mode
DVD Recorder like VCR
Complicate…
Simple!
Like VCR
DVDR
Finalize, Format, Unfinalize,
Select V/VR mode, Disc
Manager, Edit Playlist, Edit
Chapter…etc
REC
Press EZ REC Mode
STOP
PLAY
EZ REC Mode
DVD Recorder like VCR
1. Auto Setting for All Formats
Operated in their separate ways
DVD+R
Initialize
Finalize
Format
Edit
DVD-RAM
O
-
V/VR
Play list
DVD-RW
O
O
V/VR
Play list
DVD+RW
O
O
O
Chapter
DVD-R
-
O
O
-
DVD+R
O
O
O
-
Initialize
What’s Format?
Samsung DVD Recorder does setting itself for all Formats
Initialize
Finalize
Format
Edit
DVD-RAM
O
-
V/VR
Play list
DVD-RW
O
O
V/VR
Play list
DVD+RW
O
O
O
Chapter
DVD-R
-
O
O
-
DVD+R
O
O
O
-
There is
One Format
from now on
Beginner Mode
DVD Recorder like VCR
2. UI Identity for All formats
Operated in their separate ways
• Different Menu
DVD+R
• Different UI
Scenario
Initialize
• Different Menu
Naming
Different UI for each format!
Same UI to operate DVD Recorder with All Format
Same Menu
Same UI Scenario
For All Format
HDMI OUT
HDMI (High Definition Multimedia Interface)
- Pure Digital for Perfect Vision
 HDMI Output -High Definition DIGITAL Video Out (Up to 1080P)
Digital Signal
Processing
Digital-toAnalog Converter
11
1080P HDMI OUT
No More high quality! 1080p
1080p
Bypass
1080i
1080p
De – Interlacing
1080p
Scale-Up
480p
480i
480i
[DVD Title]
 Samsung DVD is perfect matching with Full HD TV
HDMI CEC
HDMI (High Definition Multimedia Interface)
- 100% Digital way of AV Streaming without Loss
- Up Scaled Video Output upto 1080P: Better DVD
- HDMI CEC(Commands go each Devices through HDMI Cable)
HDMI CEC
1) One Touch Play
Intellectual Action
• Disc In → TV ON → Auto Setting → AutoPlay
2) Sysetm Stand-By
• Power Off by one Click
3) Deck Control
• Play, Stop, Pause with Any Remote
4) Device Menu Control
• Send menu command by TV remote
5) Remote Control Pass
Through
• Channel, Volume Up / DN
●
●
●
13) Vendor Specific Commands
13
Specification – Product Specifications
Specification – Chassis Product Specifications
4. Description
21
Disassembly and Reassembly
5. Disassemble / Reassemble
MAIN
PCB
VCR PCB
JACK
PCB
DVD
LOADER
VCR
DECK
Front-Micom Interface
• Front-Micom UPD78F4928GF(IC601, NEC) is used to
control Power, LED Module, MTS Block, KEY Input
Matrix etc.
• The SPI (Serial Peripheral Interface) port provides a
bus for a serial interface with AV-CODEC MS9301
Video Interface
•
MIC1 (MPEG2 Encoder/Decoder) diverges from the 13.5MHz crystal, then
generates V-SYNC and H-SYNC.
•
MIC1 does RGB encoding, copy guard processing and D/A conversion of
10bit Video signal converted into analog signal is outputted via amplifier
of analog part.
MIC1 inputted from pin 131 with 13.5MHz generates HSYNC and VSYNC
which are based on video signal. It is synchronous signals with decoded
video signal.
The above signals, which are CVBS (Composite Video Blanking Sync),
Y(S_Video)/C(S_Video), Y(Component)/Cb(component)/Cr(component),
R(Red)/G(Green)/B(Blue) are selectively outputted 576i(interlaced Video
Output), 576P(progressive Video Output).
•
•
•
MIC1 adopts 10bit D/A converter. It performs video en-coding as well as
copy protection.
•
IC801(MM1764) switch whole the I/O signals of jack block. This switching
IC is controlled by I2C protocol between IC601(IO front micom).
NTSC/PAL Video DECODER
 Video Decoder(SAA7138) is a high quality NTSC, PAL, and SECAM
video decoder plus YPbPr component inputs designed for
multimedia applications.
 This AVIC1 (SAA7138) includes three 10-bit high speed ADCs.con
verters. and A/D conversion of 10bit analog Video signal converte
d into Digital Video signal (ITU-R656 Format) is outputted via
 On CVBS inputs, the user can control video characteristics such a
s contrast, Brightness, saturation, and hue via an I2C DIC1 port in
terface.
 A built-in versatile VBI slice and VBI data pass-through capability
support common data services (VPS/PDC, auto clock search)
Analog Video MUX
with AMP.(M1764AQ)

IC801 is analog MUX.
As SCL,SDA[Pin 38,39] of the IC801
are controlled by the Front Micom, IC801
select AV 1 of CVBS[Pin 56] , AV 2 of
CVBS[Pin 58] and RF signal.

The analog Video Signal of IC801
output is selected by the IC601 via AVIC1
(Video Decoder : SAA7138) of analog
Video input parts.

IC801 includes 6dB amplifier.

Based on CVBS signal, the final output l
evel must be 2Vpp without 75ohm
terminal resistance. Because the level
of video encoder output is only 1Vpp, the
level is adjusted with the special amplifier
.
 CVBS, Y, C, Y(R), Cb(B), Cr(R)
outputted from video encoder are
inputted to AVIC1[Pin 2,8,6,11,14,16]
respectively.

The signal to which gain is adjusted by
amplifier is outputted from jack via
75ohm Resistance (VR30, 31, 32, 33,
34).
Audio Interface
AUDIO
1.Input block
DVD-VR375 has two stereo line input terminals and internal TV-audio
from RF Tuner Block. These three analog audio signal sources are
converted to digital data by Input Block. Input block has a Multiplexer
(IC801), A/D converter inner AV-codec. IC801 change it’s output by
selection control signal from IC601(front micom).
2.Output Block
DVD-VR375 has two stereo analog line out terminals and one digital
output terminal. Decoded signal by MIC1 is inputted to AVIC1
(D/A converter inner video decoder) then filtered and amplified by
AIC4(OP-AMP). And the digital audio signal (SPDIF) is outputted in
Coaxial terminal.
Stereo/Bilingual
(MTS inner Video decoder,SAA7138)
 summary
1) MTS SIGNAL : MONO(L+R),STEREO(L,R),MONO+SAP,STEREO+SAP
2) SAP : Sub Audio Program Signal (American MTS system only)
< MTS system base-band spectrum >
(KHz)
50
주
파
수
편
이
AM-DBS-SC
L-R
dbx-TV
NR
25
Sub Audio Program Signal
↓
FM
L+R
15
50~15KHz
5
3
0
SAP
dbx-TV NR
Pilot
↙
fh
FM 10KHz
50~10KHz
2fh
3fh
4fh
5fh
Telemetry Signal
↓
6fh 6.5fh
< MTS signal table >
item
Signal
freq. Band
signal
Monaural Signal
( L + R )
Stereo Pilot
Stereo Signal
( L - R )
Signal Processing System
50Hz~15KHz
15.734 KHz
50Hz~15KHz
Maximum Audio
Carrier dev(KHz)
25
Only Stereo Broadcasting
AM modulation(Carrier frequency 2fh)
dbx Noise Reduction processing
5
50
FM modulation(Carrier frequency 5fh)
SAP Signal
50Hz~10KHz
Maximum frequency deviation 10KHz)
15
dbx Noise Reduction processing
Telemetry
Signal
Audio
Data
0Hz~3.4KHz
0Hz~1.5KHz
FM modulation(Carrier frequency 6.5fh)
Maximum frequency deviation 3KHz)
3
 Signal route
1) SIF signal from tuner (TM1) is connected to Video decoder(MTS processor
block, SAA7138 33pin).
*.SIF : Sound Intermediate Frequency
2) MTS processor block(Inner SAA7138) detect the stereo and sap signal and send
the detecting state to front micom (IC601) by I2C data.
It will display the screen by OSD.
*.OSD : On Screen Display
3) MTS processor block decode the SIF signal and send the decoded audio signal
to 106 pin(L out) and 107 pin(R out).
4) L out(106 pin) and R out(107 pin) of MTS processor block go to IC801 for audio
processing.
Tuner
<Block diagram of Tuner >
VCR System Control
•
The system control circuit inputs
the commands given by the
operator to set the mechanism and
circuit to the commanded mode.
•
The circuit also inputs the detected
output from the tape and
mechanism protection sensor and
protects the VCR and tape against
abnormal operation.
•
The system control is performed by
4 control sections. (System and
timer control, Servo control, F/S
Tuner, On Screen Display).
VCR Servo
The servo system is divided into two loops.
The cylinder servo controls the rotation of video heads and the capstan servo
controls the tape speed. In addition it’s necessary to control cylinder motor,
especially during trick play in 4H’D models.
The cylinder servo loop controls the phase and speed of the cylinder motor.
The speed is kept at a constant 1800 RPM and the phase determines the
mechanical position relative to the vertical Sync signal.
The capstan servo loop controls the phase and speed of the capstan motor so
that the video head can trace the video track correctly. It keeps tape speed
constant according to the mode (SP, SLP) during playback and recording.
VCR Video
The selected video input signal goes to
pin 50 of Lumi /Chroma processor IC
(IC301).
And then it enters VIDEO AGC circuit.
The gain of AGC circuit is controlled by
AGC detector so that the output is
constant (approx. 2Vp-p).
The output signal of AGC is clamped by
the FBC (Feed Back Clamp) circuit.
This signal appears at pin 65, after
being amplified at the internal video
amp and driver.
The output signal from the clamp circuit
enter the detail enhancer circuit.
In the detail enhancer circuit,
the low level high frequency video signal
is emphasized to improve the original
signals frequency characteristics.
Nonlinear emphasis circuit is employed to improve S/N and frequency
response characteristics together with the following main emphasis.
Noise effects the FM wave at a higher frequency, so the S/N can be
improved by emphasizing the higher frequency before recording and by
suppressing the play signal during demodulation.
The difference of non linear emphasis from main emphasis is that the
emphasis characteristics change is depending on the input level.
The gain of the emphasis circuit is inversely proportional to the level of
the high frequency component of the signal.
That is, if the high frequency portion of the signal is low the main
emphasis circuit will amplify the signal.
Hi-Fi Audio
Hi-Fi circuit consists of Hi-Fi audio LPF, VCO, BPF, FM detect circuit and
switching noise compensator, PRE-AMP etc. Linear audio consists of an
ALC circuit, REC EQ circuit and a PB EQ circuit.
Hi-Fi and Linear audio share the same input selector, output selector
and mute circuit.
OSD
The on screen display circuit consist
of a character generator decoder,
video mixer, sync separator and sync
generator, sync detector circuit.
The data is decoded and generates
characters in syncro with composite
video signal applied pin 13, 15. Also
the sync detector circuit
discriminates the presence of a video
signal by detecting sync, if no sync
is detected, a blue screen is
displayed.
In other word, the OSD circuit displays
character on the video when there is
a video signal or on blue screen
when there is no video signal. (No
sync).
`
9.MICOM Initialization & Update
. DVD Software Update (1)
(1). Introduction
Samsung will often support software update to improve the performance of DVD Recorder & VCR
to the latest staus, through Samsung Internet Site.
(2). How to make an update disc
• Write the downloaded file onto a blank CD-R or CD-RW disc, using the following settings :
1) You have to download a new file through Samsung lnternet site. (www.samsung.com)
2) Write the file to disc using the CD-RW of your computer.
NOTE:
• Recommended Application Program
- Nero Burning / Easy CD Creator ..etc
• Option
- Only single session
- CD close & disc at once
- ISO 9660 or joliet format
-Extension name : "*.UPD“ (DVD Software)
: "*.SMD“ (Loader Software)
65
9.MICOM Initialization & Update
. DVD Software Update (2)
WARNING :
It is very important : please read the below notice below before updatang your unit.
The following events may interrupt the update process and MAY RESULT IN PERMANENT
DAMAGE TO THE UNIT WHILE UPDATING
1. Unplugging the power cord.
2. Power Outage.
3. Dirt or Scratches on the disc.
4. Opening a disc tray during processing.
66
9.MICOM Initialization & Update
. DVD Software Update (3)
1) Press OPEN/CLOSE to open the disc tray.
2) Insert the update CD-R disc with the software update, label
facing up.
3) Press OPEN/CLOSE to close the disc tray.
* If you don't see the message above, try another disc.
Generally, this is caused by disc quality and by disc creating
problem.
4) Press the "Execute" button on the remote control.
-. The disc tray will be opened automatically. Remove the disc on
the tray.
-. The message below will be displayed n the screen while on
updating.
5) It takes about 1~2 minutes to complete the update.
6) Turn off the unit with power button. And there after turn on the
unit with
power button. The drive firmware is now completed.
67
Troubleshooting
Schematic Diagram
All Block Diagram
ELECTRONICS
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© Samsung Electronics Co., Ltd. FAB.2008
Printed in Korea