Yamaha rx-v561 Service Manual page 68

A B C
RX-V561/HTR-6050
OPERATION 2/2
1
12.7
2
13.1
13.1
CB251
1.7
1.7
W2251
3
OPERATION (3)
4
3.3
3.3
3.3
0
0
5
0 0
11.1
0
W2151
0
10.9 10.3
10.3
IC232
CB231
6
10.3
CB232
1.5
1.5
0
IC233
7 5.0 19.2
0
W2152
CB233
8
W2153
W2154
9
10
# All voltages are measured with a 10MΩ/V DC electronic voltmeter.
# Components having special characteristics are marked s and must be replaced
with parts having specifications equal to those originally installed.
# Schematic diagram is subject to change without notice.
68
D E F
3.2
3.2
0
13.3 13.3
AC 6.9
5.5 5.5
5.5
5.5
5.5
CB256
0
0
W251A W251B
CB257
CB252 CB254
W252A
W252B
To POWER TRANSFORMER
3.3
0
3.3
0
IC238
1.0
0
0
0
11.1
IC235
5.3
11.1
1.5
0
-19.4
IC236
19.2
12.0
-0.1
-0.1
0
-20.4
0
-11.8
-20.2
IC237
IC234
11.9
5.3
11.9 5.0 5.4
0
0
0
0
G H
AC IN
CB253 CB255
OPERATION (4)
OPERATION (2)
3.3
11.1
5.2
0
CB234
AC 31.9
AC 10.7
To POWER TRANSFORMER
AC 10.8
AC 5.1
CB235
Page 67 K5
to OPERATION (1)_CB203
I J K
IC237: KIA7912PI
Voltage regulator
1 COMMON (GND)
R22
R15 R18 R21 R23
Q28 Q17 Q21
Q22 Q24
R16 R13 R12
Q23
R24
Q19
Q29
R20
R1
Q18 Q20
Q25
Q30
R14 Q31
R17 R25
R19
Q12 Q13
Q2 Q3 Q26-1 R11
R10
R26 3 OUTPUT
Q26 Q27
Q27-1
Q7
D4 Q14
Q15
R0 C2 C1
Q16
Q8 R9
R4 R5 R6
Q4 Q6 Q9 Q11
R3
Q5 Q10
R8
R2
R7
2 INPUT
IC235: NJM2388F05
Low dropout voltage regulator with ON/OFF control
V V
IN
OUT
Bandgap
Reference
ON/OFF
Cont
control
Over Voltage Thermal Over Current
Protection Protection Protection
GND
L M N
IC232: NJM2388F33
Low dropout voltage regulator with ON/OFF control
V
IN 1 2 V
OUT
Bandgap
Reference
ON/OFF
Cont
4
control
Over Voltage Thermal Over Current
Protection Protection Protection
GND
3
IC236: KIA7812API
Voltage regulator
1 INPUT
R22 R17 R23
R1 Q11
Q11-1
Q15
Q16
Q12
Q14 R14
R10 R15
Q17 Q19
R16
R19
R12 3 OUTPUT
Q18 R20
Q6
Q1
R18
R11 R9
R7 C1
Z1
R2
Q10
Q2
Q7 R21
R3
Q13
Q4
Q3 Q5 Q9 Q8
R13
R4 R5
R6 R8
2 COMMON (GND)
IC233, 234: KIA7805API
Voltage regulator
1 INPUT
R22 R17 R23
R1 Q11 Q11-1
Q15
Q16
Q12
Q14 R14
R10 R15
Q19
Q17
R19 R16
R12 3 OUTPUT
Q18 R20
Q6
Q1
R18
R11
R9
Z1 R7 C1
R2 Q10
Q2
R21
R3 Q7
Q13
Q4
Q3 Q5 Q9 Q8
R13
R4 R5
R6 R8
2
COMMON (GND)
IC238: LM61CIZ
Temperature sensor