Yamaha TX-497 Service Manual page 22

A B
TX-497
SCHEMATIC DIAGRAM (OPERATION)
1
5.5(5.5) 5.2(5.2)
5.5(5.5)
4.8(4.8)
2
11.5(11.5) 11.4(11.5)
3
10.7
(10.7)
0(0)
5.5(5.5)
5.2(5.2)
4
ToTUNER
CB4
see page 21 H7
5
6
7
PIN CONNECTION DIAGRAM OF TRANSISTORS, DIODES AND ICS.
DTA114ES 2SC2061(P,Q,R) 2SC4495
2SC1809S(N,P) 2SC2878(A,B)
2SC1740S(R,S)
DTC114ES
DTC144ES
2SA933S(Q,R)
8
E E B
C C C
B E
B
Ω
All voltage are measured with a 10M /V DC electric volt meter.
Components having special characteristics are marked
replaced with parts having specifications equal to those originally installed.
Schematic diagram is subject to change without notice.
9
22
C D E
0(0)
4.7
(4.7)
0(0)
0(0)
0(0)
4.7(4.7)
0(0)
0(0)
0(0)
5.3(0)
0(0.1)
0(0.1)
0(0)
0(0)
0(0)
0(0)
4.8(4.8)
1SS133 LA3401 LC72130 LC866420B
HZS6C2TD6.0V LA1266
1
HZS11B2TD
80
HZS9A2TD9.0V
Anode
1T2
HZS242TD
12
11
22
24
65
1
1
Cathode 64
and must be
F G
5.5(5.5)
4.9(4.9)
-13.4(-13.6)
-11.7(-12.0)
-11.2(-11.5) pin 12 of IC501
-11.0(-11.2)
-10.7(-10.9)
-10.6(-10.8)
-10.5(-10.8)
-20.8(-20.9)
-20.8(-20.9)
-20.8(-20.9)
-20.8(-20.9)
-20.8(-20.9)
-20.9(-21.0)
emitter of Q501 and collector of Q502
Q501
Q502
24
25
40
41
(Connect the power cord)
H I
POWER ON POWER OFF
(Disconnect the power cord)
J K L