Yamaha YHT-196 Service Manual page 81

A B C
OPERATION 1/2
1
2
3
PHONES
OPERATION (5)
SILENT CINEMA
JK166
4
CB166
Page 83 I4
to MAIN (1)_W1
5
OPERATION (8)
6
7
8
9
Page 78 B2
to DIGITAL_CB221
10
D E F
VFD DRIVER
IC101
Remote control
sensor
Key detection for A/D port
Key input (A/D) pull-up resistance 10 k-ohms
Ohm
Normal voltage
0 – 0.15
value range
A/D value range
(3.3 V=255)
Key name
STRAIGHT
(KEY1, 92 pin)
Ohm
Normal voltage
0 – 0.15
value range
A/D value range
(3.3 V=255)
Key name SCENE
(KEY2, 91 pin) RADIO
G H I
FM
MODE MUTE
BD
TV CD RADIO
DVD
CB171 CB103
W1002
(Power)
OPERATION (1)
OPERATION (7)
0 + 1.0 k + 1.5 k + 1.8 k + 2.2 k + 3.3 k + 4.7 k
0.15 – 0.48 0.49 – 0.82 0.83 – 1.14 1.15 – 1.46 1.47 – 1.79 1.80 – 2.12
0 – 11 12 – 37 38 – 64 65 – 88 89 – 113 114 – 139 140 – 164
TUNING TUNING PRESET PRESET
AM FM
>> << >
0 + 1.0 k + 1.0 k + 1.5 k + 1.5 k + 2.2 k + 3.3 k
0.15 – 0.42 0.43 – 0.70 0.71 – 0.97 0.98 – 1.24 1.25 – 1.53 1.54 – 1.84
0 – 11 12 – 32 33 – 54 55 – 75 76 – 96 97 – 119 12 – 142
SCENE SCENE SCENE PROGRAM PROGRAM INPUT
CD TV BD/DVD > <
J K L
CB102
Page 82 F9
W1001
to OPERATION (2)_CB136
VOLUME
W1003
OPERATION (6)
IC101: M66003-0131FP-R
18 digit 5 x 7 segment VFD controller/driver
CS
SCK
SDATA
XIN
XOUT
RESET
Vcc1
Vcc2
Vss
Vp
+ 8.2 k + 10.0 k
2.13 – 2.40 2.41 – 2.91
165 – 186 187 – 226
MEMORY INFO
<
+ 4.7 k (22 k + 33 k) 22.0 k 33.0 k
1.84 – 2.10 2.11 – 2.33 2.34 – 2.54 2.54 – 2.71 ★ Components having special characteristics are marked
with parts having specifications equal to those originally installed.
★ Schematic diagram is subject to change without notice.
143 – 163 164 – 181 182 – 197 198 – 209
INPUT TONE
– (Power)
CONTROL
> <
M N
HTR-2064/NS-B20/NS-C20/NS-SWP20
Display code
RAM CGROM
44 SEG00
(8-bit x 60) (35-bit x 166)
Segment 19 SEG25
Code
output
write
17 SEG26
circuit
CGROM
dot data 9 SEG34
2 Serial data (35-bit x 16)
write
3 receive
Code/
circuit
4
command
45 SEG35
control
circuit
DIG11/
52
SEG42
DIG12/
51
SEG41
Segment/
code DIG13/
Digit 50
select SEG40
select/
DIG14/
49
7 Clock output SEG39
timing Display
generator clock scan pulse circuit DIG15/
6 controller 48
SEG38
DIG16/
47
SEG37
DIG17/
46
SEG36
63 DIG00
Digit
1 output
circuit
8
53 DIG10
18
5
64
and must be replaced
81