20
CIRCUIT
4. SWITCHING OPERATION
In this switching system, Video signals are selected by two A/V SW ICs (KA8119B & LA7152), Audio signals are
separately selectd by Hi-Fi IC itself which was controlled by the I
2
C bus. - W3D1, W3D2 mean the serial data bits for
the selection. -Refer below the table.
KA8119B contains the C+ SWs for Audio and Video signals. So Video and Audio signals are controlled by AV3 and
AV4 at the same time.
The item “Video Sel” means the input pin number of AV one chip IC(LA71511M). At the case 15, 16 Video input shall
be selected with Pin 32 (C+ discrambled signal).
If the power’s off at the state selected with F.AV, the SW mode is Case 16, 17 (For only VCR mode).
(1) CANAL plus mode.
Audio Sel
Tuner
AV1
AV2 or C+ decoder
F.AV
W3D1
L
H
L
H
W3D2
L
L
H
H
Remarks
MODE
POWER
OFF
PLAY
EE
TV/
VCR
-
-
TV
VCR
TV
VCR
TUNER
/AV
/F.AV
TUNER
AV
-
-
TUNER
AV
F.AV
TUNER
AV
F.AV
REC
-
-
-
-
NO
YES
-
-
-
-
-
C+
MEM
-
-
-
-
-
NO
YES
-
-
-
-
-
C+
NO
YES
NO
YES
NO
YES
-
NO
YES
NO
YES
NO
YES
NO
YES
NO
YES
NO
YES
NO
YES
-
-
TV
CTL
L
H
L
H
L
H
H
L
H
L
H
L
L
L
H
L
H
H
H
H
H
H
H
AV4
CTL
H
L
H
L
H
L
H
H
L
H
L
H
H
H
H
H
L
H
H
H
H
H
H
AV3
CTL
L
L
L
L
L
L
L
L
L
L
L
H
H
L
L
L
L
H
H
L
L
L
L
AV2
CTL
L
L
L
L
L
L
L
L
L
L
L
H
L
L
L
H
H
H
L
L
L
H
H
AV1
CTL
H
H
L
L
H
H
H
H
H
H
H
H
H
L
L
L
L
H
H
L
L
L
L
VIDEO
SEL
PIN30
PIN30
PIN30
PIN30
PIN30
PIN30
PIN30
PIN30
PIN30
PIN30
PIN30
PIN30
PIN30
PIN30
PIN32
PIN30
PIN30
PIN30
PIN30
PIN30
PIN32
PIN30
PIN30
AUDIO
W3D1
L
L
H
H
L
L
L
L
L
L
L
L
L
H
L
H
H
L
L
H
L
H
H
SEL
W3D2
L
L
L
L
L
L
L
L
L
L
L
L
H
L
H
H
H
L
H
L
H
H
H
REMARKS
Case 1
Case 2
Case 3
Case 4
Case 5
Case 6
Case 7
Case 8
Case 9
Case 10
Case 11
Case 12
Case 13
Case 14
Case 15
Case 16
Case 17
Case 18
Case 19
Case 20
Case 21
Case 22
Case 23
Summary of Contents for DV-K82 series
Page 71: ...68 CIRCUIT DIAGRAMS 9 1 Connection Diagram SECTION 9 CIRCUIT DIAGRAM 68...
Page 72: ...69 CIRCUIT DIAGRAMS R819 5 1 9 2 Power Circuit Diagram...
Page 73: ...70 CIRCUIT DIAGRAMS 9 3 Syscon and Logic Circuit Diagram...
Page 74: ...71 CIRCUIT DIAGRAMS 9 4 AV SW Circuit Diagram...
Page 75: ...72 CIRCUIT DIAGRAMS 9 5 IF PDC Circuit Diagram TM...
Page 76: ...73 CIRCUIT DIAGRAMS 9 6 If Module Circuit Diagram A2...
Page 77: ...74 CIRCUIT DIAGRAMS 9 7 If Module Circuit Diagram Nicam...
Page 78: ...75 CIRCUIT DIAGRAMS 9 8 Hi Fi Pre Amp Circuit Diagram...
Page 79: ...76 CIRCUIT DIAGRAMS 9 9 Video Audio Circuit Diagram...
Page 80: ...77 CIRCUIT DIAGRAMS 9 10 Remocon Circuit Diagram...
Page 81: ...SECTION 10 COMPONENTS LOCATION GUIDE ON PCB BOTTOM VIEW 78 P C B LOCATION 10 1 PCB Main...
Page 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...
Page 83: ...81 P C B LOCATION DV K88 S S Series...
Page 84: ...SECTION 11 DISASSEMBLY 83 DISASSEMBLY 11 1 Packing Ass y...
Page 85: ...84 DIAGRAMS DV K88 Series DV K82 Series DV K8K Series DV K86 Series 11 2 Front Panel Assembly...
