Yamaha HTY-7040, Service Manual

Page: 90 / 129

CB508
CB507
CB506
CB505
CB504
IC511
IC509
IC510
IC507
IC506
IC520
IC502
IC503
IC505
IC501
IC504
CB501
A
1
2
3
4
5
6
7
8
9
10
B C D E F G H I J K L M N
YSP-4000/YSP-40D/HTY-7040
90
★
All voltages are measured with a 10M
Ω
/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.
POWER 1/2
C-2
C-3
1
2
(317.4)
109.2
(0)
109.2
(317.2)
(496.6)
(398.4)
(317.2)
(317.2)
(316.8)
(316.8)
(1.5)
(0.4)
(1.5)
(2.0)
(15.1)
(4.1)
(0.5)
(2.8)
(0.4)
(0)
14.4
14.4
(2.8)
(0)
10.9
9.8
(4.1)
(15.2)
(2.0)
0 12.1 14.4
11.8
11.8
5.0
14.4
5.0
11.8
14.4
11.8
11.8
11.8
0
14.4
14.4
-35.3 0
0
-32.3
-32.8
-35.3
0
4.4
3.3 4.4
3.3 4.4
0
3.3
3.2
3.3
3.2
3.2 0.1
(7.8)
0
0.8
0
3.2
0.1
0.1
(1.0)
(1.0)
(7.8)
(3.9)
(3.9)
(0)
(0)
0.1
0
0
0
0
0.2
7.2 7.2
7.2
0
(1.1)
(318.6)
(313.3)
135.4
(313.3)
(319.3)
(427.7)
(427.7)
(318.6)
(0)
135.4
(0)
(0)
(4.8)
4.4
3.4
(0.3)
(2.5)
(1.1)
(5.9)
4.3
4.4
3.4
0
0
0 7.2
5.0
0 0
0.2
4.4
0
0
(317.1)
(15.2)
(0)
(15.2) (0)
12.1
0
0
Primary side ground
Primary side ground
POINT C-2 C-3 1 / Pin 1 of IC507, 2 / Q505 (C)
AC cable ON
AC cable OFF
IC507 1pin
Q505 (C)
1
2
IC507 1pin
Q505 (C)
1
2
AC cable ON
AC IN
0.8V/0.68V
8.5V/7.9V
5V VCC
ENB
5V REF
3.5V
4V
RT CT
OSC
+0.24V
R
S
QB
Q
ENB
OUT
PUT
16.5V/9V
UVLO
15.5V
15.5V
5.2 µ A
0.95mA
PWM
0.8V
Dmax
FA5510: 46%
FA5511: 70%
5V Controlled block
FB
(2)
REF
(7)
CS(8)
VCC(6)
OUT
(5)
GND
(4)
IS+(3) RT(1)
FF
IC504 : FA5511N-D1-TE1
CMOS IC for switching power supply control
V DD
CE
3
1
5
Pin No. Symbol Description
1 VOUT Output Pin for Voltage Regulator
GND Ground
VDD Power Supply Pin
CE
NC
Chip Enable Pin (active at "H")
B Version No Connection
2
3
4
5
2
V
OUT
4 NC
GND
IC507 : R1154N033B-TR-F
Voltage regulator
Vref
Short
Protection
Circuit
Current
Limit
Circuit
Thermal
Shutdown
IC508, 512 : NJM431U
Adjustable precision shunt regulator
ANODE REFERENCE CATHODE
1 2 3
IC509, 510 : NJM78M12FA
Voltage regulator
INPUT
OUTPUT
COMMON
IC511 : NJM78M05FA
3-terminal positive voltage regulator
IN
OUT
GND
IC502 : MIP2F40MSSCF
For switching power supply control
IN
clamp circuit
[LM setting]
[LM ]
variable
circuit (5-100%)
Q
Q
S
VCC
VDD
CL
R
ICL_LOW
MAXDC
CLOCK
12KHz
Constant
current resource Overheat
protection
[LM ]
compensation
Blanking pulse
generation
circuit in on-state
Restart
trigger
VCL_OUT
FB
Q
Q
5.7V
5.9V
5.1V
7.5V
VCC UV
VCC UV
VCL
VCC OVP
Oscillator
Light load detection
For intermittent
Oscillation control
Drain current
for detection
Power
MOSFET
Gate driver
VDD clamp circuit
regulator
6.6V
24V
27%
22%
S
R
DRAIN
SOURC
Voltage
regulator
Over current
protection
circuit
Over heat
protection
circuit
ON/OFF
circuit
circuit
Q
+
-
R
S
F/F
2
5
4
1
3
COM
PWM COMP.
VIN VOUT
ON/OFF
Oadj
Vref
ERROR AMP.
Soft start
Oscillator
IC520 : PQ1CG41H2FZ
Chopper Regulator
+
-
POWER (1)
Primary side ground
(U, C, A, B models)
to AMP_W501 P
age 87
K5
to AMP_W502
P
age 88
N3
to INPUT_CB11
P
age 85
J8
to DSP_CB7
P
age 84
K2
to HDMI_CB5
P
age 89
N9
5 k-ohms
10 W
5 k-ohms
10 W
安全対策
・ この製品の内部には高電圧部分があり危険です。修理の際は、絶縁性の手袋を使用するなどの安全対策を行ってください。
・ 下記箇所には電源をOFFにした後も電荷が残り、高電圧が維持されており危険です。
修理作業前に放電用抵抗（5 kΩ/10 W）を下記箇所の端子間に接続して放電してください。
放電所用時間は約30秒間です。
1. POWER
（
1
）
P.C.B.
のC504／C505
2. POWER （ 1 ） P.C.B. のC518
Safety measures
• Some internal parts in this product contain high voltages and are dangerous. Be sure to take safety measures during servicing, such as wearing insulating gloves.
• Note that positions indicated below are dangerous even after the power is turned off because an electric charge remains and a high voltage continues to exist there.
Before starting any repair work, perform discharge by connecting a discharge resistor (5k-ohms/10W) between terminals at following positions.
The time required for discharging is about 30 seconds.
1. C504/C505 on POWER (1) P.C.B..
2. C518 on POWER (1) P.C.B.
.