-4-
Chassis Block Diagrams
SYSTEM CONTROL
12
KEY SWITCH IN
KEY
SWITCH
TV/AV SWITCH
(TV=LOW,
AV=HIGH)
SCL
2
1
31
SDA
POWER ON/OFF
PHOTO COUPLE
(ON=HIGH, OFF=LOW)
IC201
IF/VIDEO / CHROMA/DEF.
IC801
CPU
QXXAVC044P
22
19
20
21
18
17
27
3
4
7
6
32
28
23
33
OSD BLK OUT
(Active=High)
OSD RED OUT
(Active=High)
OSD GREEN OUT
(Active=High)
OSD BLUE OUT
(Active=High)
DEFLECTION
CIRCUIT
HORIZ. SYNC IN (ACTIVE=LOW)
VERT. SYNC IN (ACTIVE=LOW)
POWER PROTECT IN
(POWER ERROR=LOW)
POWER CIRCUIT
etc.
SCL
SDA
IC802
MEMORY
OSC
X801
32.768KHz
CPU OSC OUT
CPU OSC IN
LED
ON-TIMER LED OUT
(ON TIMER ON=Low)
RC SIGNAL IN
(ACTIVE=HIGH)
RC PRE-AMP.
24
26
IC001
AUDIO AMP.
VIF-M OUTPUT (HIGH=NTSC3.58, LOW=OTHER)
A101
F/S TUNER
AFT SIGNAL INPUT
10
RESET INPUT (ACTIVE=LOW)
13
MUTE OUTPUT
(MUTE ON=HIGH)
29
AV1/AV2 SWITCH
(AV1=LOW, AV2=HIGH)
IC1201
AUDIO SWITCH
5
6
SECAM KILLER INPUT (HIGH=SECAM)
IC3701
AUDIO CONTROL
&
SURROUND
13
14
11
10
IC1401
VIDEO SWITCH
8
11
12
IC3702
L/R, L/L, R/R
SWITCH
9
17
10
18
9
IC1501
VIDEO SWITCH
11
3
(AV1=LOW,
AV2=HIGH)
(Y =LOW,
AV VIDEO=HIGH)
(Y =LOW,
AV VIDEO=HIGH)
10
(INT. VIDEO =LOW,
EXT. VIDEO=HIGH)
