Yamaha SB168-ES Service Manual page 152

Q P O N
LD1 CIRCUIT DIAGRAM (SB168-ES)
+48 SIG PEAK +48
(Red) (Green) (Red) (Red)
INPUT 1 INPUT 2
LED current
+48 PEAK: 4mA
SIG: 9mA
28CC1-2001041873-2
M L K J
SIG PEAK +48 SIG PEAK +48
(Green) (Red) (Red) (Green) (Red) (Red)
INPUT 3
DTC123JKA (VY67760R) DTA143XKA (WE51640R)
DIGITAL TRANSISTOR DIGTAL TRANSISTOR
LD1: TR200, TR205, TR210, TR215, LD1: TR201, TR203, TR206, TR208,
TR220, TR225, TR230, TR235
TR211, TR213, TR216, TR218,
TR221, TR223, TR226, TR228,
3
TR231, TR233, TR236, TR238
R OUT
1
2 IN
3
R
2
1
GND(+)
R1 OUT
OUT
IN IN 1
1: GND
GND(+)
R2
2: IN 2
GND
IN OUT
3: OUT
GND 1: GND(+) 2: IN 3: OUT
I H G
to DM-CN401
<Page 12: A-3>
SIG PEAK +48 SIG PEAK
(Green) (Red) (Red) (Green) (Red)
INPUT 4 INPUT 5
KTC3875S (WC52940R)
TRANSISTOR
LD1: TR202, TR204, TR207, TR209,
TR212, TR214, TR217, TR219,
TR222, TR224, TR227, TR229,
TR232, TR234, TR237, TR239
3
2
3
1
2 1: EMITTER
2: BASE
1 3: COLLECTOR
F E D C
+48 SIG PEAK +48 SIG PEAK
(Red) (Green) (Red) (Red) (Green) (Red)
INPUT 6 INPUT 7
LD1 CIRCUIT DIAGRAM (SB168-ES)
B A
1
SB168-ES
2
3
4
5
6
+48 SIG PEAK
(Red) (Green) (Red) 7
8
INPUT 8
9
10
11
12
23