Yamaha CD-C600 Service Manual page 49

A B C
OPERATION 1/4
1
OPERATION (1)
Page 52 L8
to OPERATION (11)_CB809
2
0
-21.2
-21.2
-27.7
W701
3
3.2
4 0
3.2
3.3
3.3
3.4
0
3.4
0
3.4
3.4
3.3
3.3
5
3.4
0
3.3
3.4
3.4
0
3.3
CB702
6
Page 48 F2
to MAIN_CB304
7
8
9
10
D E F
3.3 3.3
-26.2 -26.2
-26.1 -26.1
3.3 3.3
3.4
0 0
PLAY
CHANGE
0 0
0
5
PURE
DISC
DIRECT
CD/USB
G H I
3.3
IC701
3.4 3.4
0
3.4
PURE DIRECT
indicator
3.3
1.9
0
iPod/USB
indicator
0
CB703 CB704
3.4 3.4
3.4 3.4
0 0
3.3 3.3
3.3 3.3
OPERATION (2)
Key detection for A/D port
Key input (A/D) pull-up resistance 10 k-ohms
Ohm
V
A/D value (3.3V=255)
KEY0 (58 pin)
KEY1 (59 pin)
Ohm
V
A/D value (3.3V=255)
KEY2 (60 pin)
IC701: TC7SH08F
Ohm
2-input AND gate
V
A/D value (3.3V=255)
KEY_O/C (54 pin)
IN B 1 5 V
CC KEY_USB (55 pin)
A B Y
KEY_PLAY (56 pin)
L L L
IN A
2
L H L
H L L
GND OUT Y
3 4
H H H
J K L
iPod/USB
CB705
Page 47 M3
to MAIN_CB6
OPERATION (4)
4 3 2 1
DISC
0 + 820 + 3.3 k + 12.0 k
0 0.2 – 0.3 0.9 – 1.0 2.0 – 2.1
0 15 – 25 70 – 78 153 – 162
– PLAY X CHANGE STOP SKIP +/SEARCH +
– SKIP -/SEARCH - PURE DIRECT DISC 5
0 + 100 + 3.3 k + 6.8 k + 22.0 k
0 0.03 – 0.1 0.8 – 0.9 1.65 – 1.75 2.45 – 2.55
0 3 – 7 60 – 70 125 – 135 190 – 200
– DISC 4 DISC 3 DISC 2 DISC 1
0
0
0
OPEN/CLOSE
CD/USB
PLAY/PAUSE
★ All voltages are measured with a 10MΩ/V DC electronic voltmeter.
★ Components having special characteristics are marked
with parts having specifications equal to those originally installed.
★ Schematic diagram is subject to change without notice.
M N
CD-C600
3.4
W702A W702B
3.4 3.4
1.6
1.6 1.6
POWER
indicator
OPERATION (3)
and must be replaced
49