8
CIRCUIT
1. LA71511M(QOP 80 PIN) : LUMINANCE-CHROMINANCE AND NORMAL AUDIO SIGNAL PROCESSING IC
1) Applicable to multi system : PAL-GBI, MESECAM, 4.43NTSC, NAP-GBI
2) Built-in NAP circuit to convert NTSC to PAL
3) Normal audio signal processing circuit (self-alignment for record bias)
4) Built-in record and playback FM-EQ function (I
2
C bus control)
5) Y/C separation using built-in comb filter
6) Built-in switching circuit for 3 video/audio inputs
7) Serial control by I
2
C-bus
8) Complete adjustment free
9) Crosstalk reduction by CCD IC for exclusive use (Color comb filter is unnecessary)
2. LA70011(4CH) : PRE-AMP IC
1) AGC circuit is built-in this IC (no record current adjustment is required)
2) Playback envelope detector circuit is built-in this IC for the purpose of auto-tracking
3. LC89977M : CCD DELAY LINE IC
1) Built-in comb filter function for color noise reduction
2) Built-in 1H delay line for luminance signal
3-2. Key Features of Video IC and Its Relatives
1. RECORD PROCESSING
The video input signal selected by the A/V switching IC(KA8119B) among AUX video input, Front video input and IF
video input, is supplied to the 35th pin of A/V 1CHIP IC.
The input video signal is then automatically adjusted to suitable level by the built-in AGC circuit and supplied to SYNC
SEPARATION and FBC(feedback clamp) part respectively.
SYNC signal obtained from the composite video signal by SYN SEP circuit is supplied to the 93rd pin MICOM to
determine the presence of signal and to control the SERVO LOGIC.
In PRE-AMP IC, fir HEAD AMP switching timing on TRICK PLAY and AGC circuit for self-aligning the record bias.
The signal through FBC is then processed in luminance signal processing part and chrominance signal processing
part independently.
3-3. Record and Playback Processing Circuit
PDC IC 13th PIN
LUMINANCE SIGNAL PROCESSING
CHROMINANCE SIGNAL PROCESSING
MICOM 93rd PIN
PRE-AMP IC 5th PIN
VIDEO
INPUT
35
37
VIDEO AGC
SYNC SEP
FBC
FIG.1 Record Processing
Содержание DV-K82 series
Страница 71: ...68 CIRCUIT DIAGRAMS 9 1 Connection Diagram SECTION 9 CIRCUIT DIAGRAM 68...
Страница 72: ...69 CIRCUIT DIAGRAMS R819 5 1 9 2 Power Circuit Diagram...
Страница 73: ...70 CIRCUIT DIAGRAMS 9 3 Syscon and Logic Circuit Diagram...
Страница 74: ...71 CIRCUIT DIAGRAMS 9 4 AV SW Circuit Diagram...
Страница 75: ...72 CIRCUIT DIAGRAMS 9 5 IF PDC Circuit Diagram TM...
Страница 76: ...73 CIRCUIT DIAGRAMS 9 6 If Module Circuit Diagram A2...
Страница 77: ...74 CIRCUIT DIAGRAMS 9 7 If Module Circuit Diagram Nicam...
Страница 78: ...75 CIRCUIT DIAGRAMS 9 8 Hi Fi Pre Amp Circuit Diagram...
Страница 79: ...76 CIRCUIT DIAGRAMS 9 9 Video Audio Circuit Diagram...
Страница 80: ...77 CIRCUIT DIAGRAMS 9 10 Remocon Circuit Diagram...
Страница 81: ...SECTION 10 COMPONENTS LOCATION GUIDE ON PCB BOTTOM VIEW 78 P C B LOCATION 10 1 PCB Main...
Страница 82: ...80 P C B LOCATION 10 3 PCB Logic DV K8K S S Series DV K86 S S Series DV K82 S S Series...
Страница 83: ...81 P C B LOCATION DV K88 S S Series...
Страница 84: ...SECTION 11 DISASSEMBLY 83 DISASSEMBLY 11 1 Packing Ass y...
Страница 85: ...84 DIAGRAMS DV K88 Series DV K82 Series DV K8K Series DV K86 Series 11 2 Front Panel Assembly...