Yamaha MCR-330, Service Manual

Page: 55 / 70

★
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
55
POWER 2/2
CRX-330/NS-BP100
IC801
JK801
W801
CB801
W802
-20.2 -21.0 -21.0 -21.1 -21.1 -21.1 -21.1 -21.1 -21.1 -21.1 -21.1 -21.1 -21.0 -21.0 -21.0 -21.0 -21.1 -20.7 -22.5 -10.4 -15.0 -20.9 -11.9 -12.1 -19.3 -16.4 -17.9 -15.9 -16.3 -14.7 -14.9 -17.0 -16.6 -21.0 -16.4 -16.2 -13.3 -19.4 -21.0 -16.5 -21.0 -10.3 -14.7 -13.3 -13.3 -21.0 -20.9 -16.5 -11.8 -10.4 -19.4 -15.3
-19.3 -16.3 -14.7 -16.4 -16.4 -16.2 -21.0 -16.5 -16.6 -13.3 -19.4 -21.0 -14.7 -13.3
-21.1
0
3.2 3.2
-21.0 -21.0 -21.1 -21.1 -21.1 -21.1 -21.1 -21.1 -21.1 -21.1 -21.0 -21.1 -21.0 -20.2
-22.7
3.2
-20.9
-16.5 -17.0
-14.9
-15.0
-17.9
-21.0
-20.9
-15.0
-21.0
-12.1
-11.9
-10.4
-22.5
-21.0
-13.3
-21.0
-21.0
-20.7
-21.0
3.2
-10.3
-11.8
-10.4
-19.4
3.2
1.5
0.4
2.8
2.1
3.2
1.5
-19.6
15.3
13.2
6.6
6.6
0.5
6.6
0
0
12.8
15.3
13.2
6.7
12.8
-19.6
-22.7
0
-15.3
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
IC801 : M66003-0131FP-R
18 digit 5 x 7 segment VFD controller/driver
2 data
timing
clock
dot data
write
scan pulse
RESET
SCK
SDATA
XOUT
XIN
Vcc1
SEG34
SEG33
SEG32
SEG31
SEG30
SEG29
SEG28
SEG27
SEG26 SEG25 SEG24 SEG23 SEG22 SEG21 SEG20 SEG19 SEG18 SEG17 SEG16 SEG15 SEG14 SEG13 SEG12
Vcc2
Vss
CS
SEG11
SEG10
SEG09
SEG08
SEG07
SEG06
SEG05
SEG04
SEG03
SEG02
SEG01
SEG00
SEG35
DIG17/SEG36
DIG16/SEG37
DIG15/SEG38
DIG14/SEG39 DIG13/SEG40 DIG12/SEG41 DIG11/SEG42 DIG10 DIG09 DIG08 DIG07 DIG06 DIG05 DIG04 DIG03 DIG02 DIG01 DIG00 VP
Segment/
Digit
select/
output
circuit
POWER (2)
PHONES
5
4
2
3
1
VOLUME
STANDBY/ON
FL DRIVER
to MAIN (1)_CB207
To chassis
Page 51 K2
to MAIN (1)_CB208
Page 51 K3
Key input (A-D) pull-up resistance 10 k-ohms
Ohm 0 +1.5k +1.8k +2.7k ∞
V 0 – 0.2 0.2 – 0.6 0.6 – 1.0 1.0 – 1.4 3.1 – 3.3
KEY0
(97pin/AN0)
PLAY/PAUSE STOP OPEN/CLOSE OFF
KEY1
(95pin/AN1)
INPUT OFF
KEY2
(70pin/AN22)
OFF