Description Of Ics - JVC XT-G70RBK Service Manual

RX-G7ORBK
Description of ICs
BM UPD78011BCW-120(IC 701): System controller
1. Terminal Layout
2. Key input (KEY A~C)
3. Terminal Descripti
on
ed [|e «|
| asstrose | O |Strobe for data transmission to 1C201 | 33 | vot.vown | O |Volume contro! signal
| 2 | asoara | 0 [Data to 1C201
[34 | vo.ur__|
0 [Volume control signal
AS CLOCK
lock for data transmission
L-sPk IND IN | O {inner indication of left panorama speaker
MIMD
N
la)
oo
17)
w
~ WIN
S.OUT 9
S. CLK
DCS IN
L-SPK UP
R-SPK DWON
DCS OUT R-SPK UP
4
(9)
Bw
U./SEA RESET
TUNER INH
RESET
REMOCON
NH
PROTECTOR
Cc
vd
Reset signal
Remote control signal input
nhibit signal input
nput from protector
hip select
ower supply
Oscillation terminal
Oscillation terminal
= N
is
Le]
TNISIZis
=! >]
2/2 |=
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oS
O15 \a
ois
oja {2
2191
3|7 1/8
i | ct ¢ i=
=i
2 ® = =
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fo}
3
ct
s o
a
a
SEA INH
FAN an control signal
uner muting signal
connected to GND
=|
TUNER MU. 1]
. CLOCK
o=}|.}afo NT ofufs
2/=
vw
2 oO
- CLOCK
nla] o rood Brod Kee)
Zio
3° 3
oO
° =] 3 @O
fe}
ind
° 3
NC Non connection vss GND
rcont [0 [Power on: H (Cassette deck, SEA)
21 co Regulator control (Power on : H) S.CONNECT Connected to +5V
RELAY 0
SOURCE MUT
VIDEO1
Relay control signal for main speaker
Mute (Power on/off, Changing source)
Video selector control
Video selector control
Non connection
Non connection
Source selector control (IC203)
ource selector control (iC203)
ower control for panorama speaker
ndication control
Connected to GND
A/D GND G) Zz iv)
3
m
VOL A/D I
TEMP A/D IN
KEYA
2
bserving the position of master volume
ensing temperature
ey input
ey input
ey input
ibserving the position of the right speaker
NIN TN py N
vi Wi} yt
WIN
VIDEO2 7
KEY B
KEYC
R-SPK A/D IN CONT 1
CONT 2
[My
j
e|ale2|2)2]3| ERE
1 L-SPK A/D IN bserving the position of the left speaker
SPK POWER
me)
bserving the connect of the headphone
WININTNIT NTN OpPwWLalw ain
31 VOL IND D VDD ower supply for inner A/D converter
|
w N
REF Reference voltage for inner A/D converter
2-2 (No. 20489)