CIRCUIT
10
2. PLAYBACK PROCESSING
The playback ENVE signal from PRE-AMP is supplied to 15th pin of A/V IC for processing the PAL luminance and
chrominance.
The output signal through Y/C MIX after each processing of chrominance and luminace is supplied to the 18th pin of
OSC IC through 38th pin.
1)LUMINANCE SIGNAL PROCESSING (PLAYBACK)
The ENVE signal is equalized by the PB-EQ, which flatterns the whole frequency characteristic.
PB-EQ is controlled by SERIAL CONTROL and determined by the GROUP 6, 6-8bits.
The PULSE characteristic is improved by passing the phase compensation circuit.
Double Limiter restores the high frequency portion and elimiantes the SPIKE NOISE and AM components.
The FM modulated signal which is recorded is demodulated and then the RECORD NONLINER EMPHASIS characteristic
is compensated by DE-EMPAHASIS through YNR.
Double High Pass Noise Canceller eliminates the high frquency noise against playback signal.
The picture control circuit improves the picture sharpness,while picture control is determined by 1-4bits of Group 8 on
controlling the SERIAL.
38
35
Y/C MIX
PRE-AMP
7th PIN
PB ENVE
OSD IC 18th PIN
luminance signal
processing
chrominance signal
processing
VIDEO AMP
FBC
15
25
42
5
7
40
17
PB-EQ
PHASE COMP
PRE-AMP 7th PIN
(LC89978M)
20
26
FM AGC
DOUBLE LIMITER
CLAMP
FM DEMOD
SUB-LPF
LPF
YNR
N.L. DE-EM
DHP NC
Y/C MIX
CLAMP
PIC CTL
Y/C MIX
FIG.4 Playback Processing
FIG.5 Luminance Signal Processing (PB)
Summary of Contents for DV-K*84W Series
Page 71: ...CIRCUIT DIAGRAMS 68 SECTION 9 CIRCUIT DIAGRAM 9 1 CONNECTION DIAGRAM DV K884W K484W K284W...
Page 72: ...CIRCUIT DIAGRAMS 69 9 2 POWER CIRCUIT DIAGRAM DV K884W K484W K284W...
Page 73: ...CIRCUIT DIAGRAMS 70 9 3 SYSCON AND LOGIC CIRCUIT DIAGRAM...
Page 74: ...CIRCUIT DIAGRAMS 71 9 4 PIF CIRCUIT DIAGRAM DV K884W K484W K284W...
Page 75: ...CIRCUIT DIAGRAMS 72 9 5 IF MPX MODULE CIRCUIT DIAGRAM DV K884W K484W K284W...
Page 76: ...CIRCUIT DIAGRAMS 73 9 6 VIDEO AUDIO CIRCUIT DIAGRAM DV K884W K484W K284W...
Page 77: ...CIRCUIT DIAGRAMS 74 9 7 Hi Fi PRE AMP CIRCUIT DIAGRAM DV K884W K484W K284W...
Page 78: ...DISASSEMBLY 79 SECTION 11 DISASSEMBLY 11 1 PACKING ASS Y...
