Yamaha HTR-6230, Service Manual

Page: 79 / 99

★
All voltages are measured with a 10MΩ/V DC electronic voltmeter.
★
Components having special characteristics are marked ⚠ and must be replaced
with parts having specifications equal to those originally installed.
★ Schematic diagram is subject to change without notice.
A
1
2
3
4
5
6
7
8
9
10
B C D E F G H I J K L M N
79
OPERATION 1/2
RX-V365/HTR-6230
CB261
JK261
CB202
IC201
JK266
W2004
W2003
CB203
CB204 CB274
W2351
W200
1
JK201
IC202
IC202
3.3
-29.7
-29.3
3.3
-29.7
-29.7
3.3
-29.7
-29.7
-29.7
-24.2 -24.2
-29.6 -29.6 -29.6 -29.6 -29.6 -29.5 -29.6 -29.6 -29.8 -30.0 -30.0 -30.0 -30.0 -30.0 -29.7 -29.7 -29.7 -31.5 -31.2 -30.6 -22.2 -22.0 -20.6 -21.6 -21.6 -25.6 -23.6 -23.2 -29.5 -29.7 -29.2 -28.7 -23.1 -23.0 -16.3 -25.9 -31.5 -23.3 -27.5 -19.9 -23.7 -29.4 -25.1 -20.4 -21.7 -21.9 -17.8 -18.2 -19.0 -19.6 -22.1 -24.1 -21.8 -25.1 -24.2 -24.2
-23.2
-21.6
-31.2
-25.1
-29.5
-23.6
-25.6
-21.6
-20.6
-22.0
-22.2
-30.6
-31.5
-29.3
-29.7
-30.0 -30.0 -30.0 -29.6 -29.6 -29.8 -29.6 -30.0 -30.0 -29.6 -29.5 -29.6 -29.6 -29.6 -31.9
-29.7
-25.1
3.3
-19.6
-24.7
3.3
0
3.2
-31.8
-28.2
-19.8
3.3
0 0
-16.3
-16.2
-16.2
-25.9 -22.1 -24.1 -31.5 -23.3 -27.5 -19.9 -23.7 3.3
-29.4
-23.0 -23.1 -28.7 -29.2 -21.8
-20.4
-21.7
-21.9
-17.8
-18.2
-19.0
-19.8
3.3
1.5
1.5
0
3.2
3.2
3.3
3.3
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0 0
0 0
3.3
52
Display
controller
Serial
receive
circuit
Digit
output
circuit
Clock
generator
DIG11/
SEG42
51
DIG12/
SEG41
50
DIG13/
SEG40
49
DIG14/
SEG39
48
DIG15/
SEG38
47
DIG16/
SEG37
46
DIG17/
SEG36
45
SEG35
XOUT 6
Vcc1 8
Vcc2 18
Vss 5
Vp 64
XIN
7
CS
SCK 3
SDATA 4
RESET
1
SEG00
44
9 SEG34
SEG26 17
19 SEG25 Segment
output
circuit
Display code
RAM
(8-bit x 60)
CGROM
(35 bit x 166)
CGROM
(35 bit x 16)
code
select
Code
write
Code/
command
control
circuit
DIG00 63
53 DIG10
2
data
timing
clock
dot data
write
scan pulse
Segment/
Digit
select/
output
circuit
IC201 : M66003-0131FP-R
18 digit 5 x 7 segment VFD controller/driver
IC202 : NJM4565M
Dual operational amplifier
8
2, 6
3, 5
1, 7
4
V+
–INPUT
+INPUT
V–
OUTPUT
VFD
VIDEO
PHONES
SILENT CINEMA
STANDBY/ON
OPTIMIZER
MIC
VOLUME
VIDEO
AUX
AUDIO
PORTABLE
OPERATION (11)
OPERATION (1)
OPERATION (7)
OPERATION (10)
OPERATION (6)
(R, K, A, B, G, E, F, L models)
to MAIN (1)_W103
Page 81 I4
to DSP_CB408
Page 76 C7
to MAIN (4)_CB191
(R, K, A, B, G, E, F, L models)
Page 82 I4
to MAIN (4)_CB192
Page 82 J4
to OPERATION (2)_CB235
Page 80 F9