44
2. PIF & INPUT SELECTOR
1) Outline
The circuit to tune proper signal of broadcasted radio frequency (RF: VHF, UHF) and to demodulate it to baseband signal for record. It
is composed of two parts, TMI and Input selector.
The former makes RF signal changed to composite video signal and audio signal, and the latter selects line input and RF input.
* Refer to "PIF & INPUT SELECTOR BLOCK DIAGRAM" and "PIF & INPUT SELECTOR SCHEMATIC"
2) The name and function of pins on TMI (Tuner/Modulator/IF)
* REFER TO TMI BLOCK DIAGRAM
3) The name and function of Pins on Switching IC (MC14053B) 2/4 Head Only
Section
NO.
Pin Name
Function
1
AUDIO INPUT
MODULATOR AUDIO INPUT
2
CH-SW
RF OUTPUT CHANNEL SWITCH (3CH: OPEN, 4CH: GND)
RF
3
MB
MODB (+5V)
MODULATOR
4
CONTROL
MODULATOR OUTPUT SW (ON: VCR MODE, OFF: TV MODE)
5
VIDEO INPUT
MODULATOR VIDEO INPUT
6
BP
TUNER PLL IC +B (+5V)
7
BT
TUNER +B (+32V)
8
PLL CLOCK
PLL CLOCK SIGNAL INPUT
TUNER
9
PLL DATA
PLL DATA SIGNAL INPUT
10
PLL ENABLE
PLL ENABLE SIGNAL INPUT
11
N.C
N.C
12
N.C
N.C (IF OUTPUT TEST POINT)
13
+B
IF CB (+9V)
14
AUDIO OUTPUT
AUDIO SIGNAL OUTPUT
15
GND
GND
16
AFT
AFT DETECT OUTPUT
17
N.C
N.C (IF AGC MONITOR POINT)
18
VIDEO OUTPUT
COMPOSITE VIDEO OUTPUT
IF (INTER
MEDIATE
FREQUENCY)
NO
Name
Function
NO
Name
Function
1
INPUT Y1
LINE VIDEO
9
CONTROL X
TUNER ‘L’
2
INPUT Y2
N.C
10
CONTROL Y
LINE ‘H’
3
INPUT X1
LINE AUDIO
11
CONTROL Z
4
OUTPUT X
AUDIO OUTPUT
12
INPUT Z2
TUNER VIDEO
5
INPUT X2
TUNER AUDIO
13
INPUT Z1
LINE VIDEO
6
INHIBIT
INHIBIT
14
OUTPUT Z
VIDEO OUTPUT
7
GND
GND
15
OUTPUT Y
LINE VIDEO
8
GND
GND
16
VCC
9V
Summary of Contents for DV- K584N-SJ
Page 35: ...34 AC001 K584NZ SJ M K584NZ SG M only...
Page 36: ...35...
Page 37: ...36...
Page 38: ...37...
Page 39: ...38...
Page 60: ...59 ELECTRICAL ADJUSTMENTS Fig 1 Circuit Board Location...
Page 92: ...91 INTERCONNECT WIRING DIAGRAM K584N K484N K384N K284N...
Page 93: ...92 POWER SUPPLY SCHEMATIC DIAGRAM FREE VOLTAGE K584NY SJ M K584NZ SJ M K584NZ SG M...
Page 95: ...94 2HD HEAD AMP SCHEMATIC DIAGRAM K384N K284N K304N...
Page 96: ...95 4HD HEAD AMP SCHEMATIC DIAGRAM K584N K484N K504N...
Page 97: ...96 VIDEO AUDIO SCHEMATIC DIAGRAM K584N K484N K384N K284N K504N K304N...
Page 98: ...97 PIF INPUT SELECTOR SCHEMATIC DIAGRAM 9V USE K584NY SJ M K584NZ SJ M K584NZ SG M...
Page 100: ...99 TIMER SYSCON SCHEMATIC DIAGRAM K584N K484N K384N K284N K504N K304N...
Page 101: ...100 POWER SUPPLY BLOCK DIAGRAM FREE VOLTAGE K584NY SJ M K584NZ SJ M K584NZ SG M...
Page 103: ...102 2HD HEAD AMP BLOCK DIAGRAM K384N K284N K304N...
Page 104: ...103 4HD HEAD AMP BLOCK DIAGRAM K584N K484N K504N...
Page 105: ...104 VIDEO AUDIO BLOCK DIAGRAM K584N K484N K384N K284N K504N K304N...
Page 106: ...105 PIF INPUT SELECTOR BLOCK DIAGRAM K584N K484N K384N K284N K504N K304N...
Page 109: ...108 MAIN PCB 2HEAD 4HEAD...
