Service manual

CB501
CB502 CB503
IC502
IC501
IC503
IC506
IC509
IC510
IC507
CB508
CB504
CB505
W506
W507
IC504
IC511
IC505
A
1
2
3
4
5
6
7
8
9
10
BCDEFGH I JK
L MN
YSP-500/HTY-750
72
★ 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.
INPUT 2/2
A-2
1
A-3
2
AC5.5
AC1.1
AC1.0
AC3.0
AC6.4
(111.6)
(333.7)
5.0
4.0
(4.0)
(5.1)
(15.2)
(1.3)
(113.9)
(332.5)
(476.4)
(33.2)
(33.2)
(1.0)
(1.0)
(1.3)
0
0
0
10.4
0
15.3
5.2
4.0
10.4
0
0
0
11.913.8
5.07.1
5.07.1
-24.2
-24.8
0
-26.3-26.30
3.3
4.010.2
3.3
0
3.3
(0.8)
(7.6)
(7.6)
(0)
(0)
(0)
(0)
1.0
0.2
0
4.1
0.2
0
(0)
0.1
0
0
0
3.3
4.0
3.3
3.3
10.2
(0.8)
(7.6)
0.1
(4.0)
(3.5)
(3.8)
(0)
(3.9)
(0)
3.9
1.0
4.1
(143.5)
(143.5)
(0)
(78.5)
(0)
(78.5)
(3.5)
0.2 0.1
0
(0)
(4.0)
(0)
0
3.3
0
0
0.8
0.1
0
4.0
10.2
11.9
0
0
13.8
3.4
0
4.3
4.0
0
(15.2)
(4.0)
(15.2)
(0)
(15.2) (-0.1)
5.0
(0.7)
4.0
(0)
(0.7)
(4.0)
(0)
(0.1)
INPUT (1)
Primary side ground
Primary side ground
3P15
IC505: FA3641N-H1-TE1
PMW control IC
REF
FB
5V VCC
EMB
5V REF
0.82V~0.68V
8.5V~7.9V
6.5uA
0.9mA
0.8V
CS VCC
15.5V
15.5V
UVL0
16.5V/9V
OUT
GND
RT IS+
EMB
OUTPUT
R
QB
FF
Q
S
PWM
0.24V
OSC
RM RT
Dmax
70%
3.0V
4V
+
–
+
–
+
–
+
–
+
–
+
–
+
–
+
–
–
–
7
2
13
4
5
68
-
+
Error Amp.
Starter
Voltage Reference
Input Short Circuit
Protection
Over Current Protection
Over Current
Protection
Rush Current
Protection
Thermal
Protection
IN
1
GND
3
OUT
2
IC506: AN77L04
Low dropout voltage regulator
IC507: NJM431U
Adjustable precision shunt regulator
ANODEREFERENCE CATHODE
12 3
IC502: TC4013BP
Dual D-type flip flop
4
RESET1
1
Q1
6
SET1
5
DATA 1
CL
3
CLOCK1
CL
CL
CL
CL
CL
2
Q1
10
RESET2
13
Q2
8
SET2
9
DATA 2
7
VSS
14
VDD
11
CLOCK2
12
Q2
CL
CL
CL
CL
CL
CL
1
2
3
4
11
12
13
14
5
6
7
8
9
10
Vss SET2
CK2
VDD
Q2
INPUTS OUTPUTS
* : Don't care
: Level change
˙ : No change
RESET
L
H
H
L
L
L
Q2
DATA 2
RESET2
SET1
RESET1
CK1
Q1
Q1
DATA 1
SET
H
L
H
L
L
L
DATA
*
*
*
L
H
*
CK
*
*
*
Qn + 1
H
L
H
L
H
Qn˙
Qn + 1
L
H
H
H
L
Qn˙
IC509: NJM78M05FA
3-terminal positive voltage regulator
IN
OUT
GND
IC510: NJM78M12FA
Voltage regulator
INPUT
OUTPUT
COMMON
POINT A-2 A-3 1 / D521, 2 / Q504
1D521 (C)
Power cable ON Power cable OFF
Q504 (C)
2
Power cable ON
to DSP_CB203
AC IN
Page 69
K4
to INPUT (3)_CB901
Page 71 G7
to DSP_CB607
Page 70
K4
to INPUT (2)_CB4
Page 71
G4
注意！ 
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. INPUT（1）P. C . B . のC502
2. INPUT（1）P. C . B . のC523
P.C.B.交換時の注意 
INPUT（1）およびINPUT（2）P.C.B.を交換する場合、必ず同時に行ってください。どちらか片方にバージョンの異なる
P.C.B.を取り付けると、動作しないことがあります。
CAUTION !
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. C502 on INPUT (1) P.C.B..
2. C523 on INPUT (1) P.C.B..
Caution for P.C.B. replacement
When replacing INPUT (1) and INPUT (2) P.C.B.s, be sure to replace them at the same time. Installing either P.C.B. of different version from the other may cause
failure of operation.
5 k-ohms
10 W
5 k-ohms
10 W