Circuit Descriptions
5-16
Samsung Electronics
5-6 Video
5-6-1 Outline
ZIC1(A/V decoder with video encoder) diverges from the 27MHz crystal, then generates VHSYNC and HSYNC.
ZIC1(A/V decoder with video encoder) does RGB encoding,copy guard processing and D/A conversion of 8bit
video data internally inputted from video decoder block by MIC1 (Micom).
Video signal converted into analog signal is outputted via amplifier of analog part.
(Main Board)
(Output Board)
ZIC1
A/V Decoder
ZiVA-4 with
Video Encoder
MIC1
Main Micom
TMP95C265F
Video
data
Low Pass Filter
(6MHz)
VIC1
Amplifier
BA7660
CVBS
Y
C
CVBS
Y/B/U
C/R/V
CVBS
CVBS
Y
R/C
B
G
C
CVBS/G/Y
SCART JACK
Fig. 6-21 Video Output Block Diagram
5-6-2 NTSC/PAL Digital Encoder (ZIVA-4.1 ; Buit in video encode)
ZIC1 inputted from pin 159 with 27MHz generates HSYNC and VSYNC which are based on video signal.
ZIC1 is synchronous signals with decoded video signal and control the output timing of 8bit video signal of ITU-
R601 format.
The inputted 8bit data which decoded from video decoder block is demuxed with each 8bit of R, G, B.
The separate signal is encoded to NTSC/PAL by control of MIC1.
The above signals, which are CVBS(Composite Video Burst Synchronized)/G(GREEN)/Y[PIN139],
Y(S_VIDEO)/B(BRUE)/Pb[PIN145] and C(S_VIDEO)/R(RED)/Pr[PIN151], are selectively outputted CVBS
+S_VIDEO, R, G, B by the rear switch.
In Course of encoding,8bit data can extend to 10bit or more. To convert the extended data to quantization noise as
possible,ZIC1 adopts 10bit D/A converter. ZIC1 perform video en-coding as well as copy protection.
5-6-3 Amplifier (VIC1, VIC2 : BA7660)
VIC1 and VIC2 are 6dB amplifier. Based on CVBS signal, the final output level must be 2Vpp without 75ohm ter-
minal resitance. Because the level of video encoder output is only 1.1Vpp, the level is adjusted with the special
amplifier. When mute of pin 1 is high active, if the pin is floating and connecte to power, the output isgnal is
never outputted. CVBS, Y, C, R, G, B outputted from video encoder are inputted to VIC1 (Pin 7,Pin2,Pin4), and
VIC2 (Pin 7,Pin 4,Pin 2) respectively and outputted from VIC1(Pin15,Pin13,Pin10) and VIC2 (Pin 15,Pin 13,Pin 10).
Pin 9, Pin 12, Pin 14 of VIC1, VIC2 are feedback pin to SAG compensation (DC characteristic compensation of
siganl).
The signal to which gain is adjusted by amplifier is outputted from jack via 75ohm Resistance (VR10~VR13,
VR22~24).
Summary of Contents for DVD-611
Page 29: ...Reference Information 2 22 Samsung Electronics MEMO ...
Page 31: ...Product Specification 3 2 Samsung Electronics MEMO ...
Page 45: ...4 14 Samsung Electronics Disassembly and Reaasembly MEMO ...
Page 65: ...Circuit Descriptions 5 20 Samsung Electronics MEMO ...
Page 75: ...Troubleshooting 6 10 Samsung Electronics MEMO ...
Page 83: ...Exploded Views and Parts List 7 8 Samsung Electronics MEMO ...
Page 95: ...Block Diagram 9 2 Samsung Electronics MEMO ...
Page 97: ...PCB Diagrams 10 2 Samsung Electronics 10 1 Main COMPONENT SIDE SOLDER SIDE ...
Page 98: ...PCB Diagrams Samsung Electronics 10 3 10 2 Jack ...
Page 100: ...Samsung Electronics 11 1 11 Wiring Diagram ...
Page 101: ...Wiring Diagram 11 2 Samsung Electronics MEMO ...
Page 103: ...Schematic Diagrams 12 2 Samsung Electronics 12 1 Power ...
Page 104: ...Schematic Diagrams Samsung Electronics 12 3 12 2 Main Micom ...
Page 105: ...Schematic Diagrams 12 4 Samsung Electronics 12 3 Servo ...
Page 106: ...Schematic Diagrams Samsung Electronics 12 5 12 4 Video ...
Page 107: ...Schematic Diagrams 12 6 Samsung Electronics 12 5 Audio ...
Page 108: ...Schematic Diagrams Samsung Electronics 12 7 12 6 RF ...
Page 109: ...Schematic Diagrams 12 8 Samsung Electronics 12 7 ZiVA A V Decoder ...
Page 110: ...Schematic Diagrams Samsung Electronics 12 9 12 8 DSP ...
Page 111: ...Schematic Diagrams 12 10 Samsung Electronics 12 9 Front Micom VFD Display ...
Page 112: ...Schematic Diagrams Samsung Electronics 12 11 12 10 Key ...
Page 113: ...Schematic Diagrams 12 12 Samsung Electronics 1 LD DVD 511 12 11 Deck 2 LD DVD 611 611B 615 ...
Page 114: ...Schematic Diagrams Samsung Electronics 12 13 12 12 Remote Control ...
Page 115: ...Schematic Diagrams 12 14 Samsung Electronics MEMO ...