-4-
Chassis Block Diagrams
SYSTEM CONTROL
BASS EXPANDER ON/OFF (ON=HIGH)
BASS EXPANDER CIRCUIT
34
11
12
COLOUR SYSTEM OPTION INPUT
KEY SWITCH IN
KEY
SWITCH
TV/AV SWITCH
(TV=HIGH, AV=LOW)
SCL
2
1
31
SDA
POWER ON/OFF
PHOTO COUPLE
(ON=HIGH, OFF=LOW)
IC201
IF/VIDEO / CHROMA/DEF.
IC801
CPU
QXXABV864
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
30
SOUND VOLUME OUT
(ACTIVE=LOW)
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
MONO/STEREO
IC1201
AUDIO SWITCH
5
6
SECAM KILLER INPUT (HIGH=SECAM)
IC2001
TELETEXT
*
Not equipped
QXXA
VC320
SM_14-C4FVR(RU) 1/6/05 2:23 PM Page 4
