Yamaha DVX-S200 Service Manual page 86

A B
DVR-S200/NX-P200
DVR-S200 SCHEMATIC DIAGRAM (SUB)
1
2
4 FI1 WC36210 WB75460 WC36210 WC36210 WC36210 WC36210 WC36210
X : NOT USED
3
4
5
Page 87 E1
to FL CB943
6
7
IC6 : MD1421N
DC/DC Converter
IC5, 10 : PQ1CG21H2F
VREF VCC VBOOT VB VGH VDD Voltage Regulator
28 6 8 25 23 18~21
UVLO
BOOT HIGH SIDE
ON/OFF
R/C 5 Start=7.2V Vref=Vout+5.8V V IN 1
CONTROL Vref=6.5V
Stop=6.7V
100°C 150°C HIGH SIDE
8
DRIVER
BANDGAP HIGH/LOW
REFERENCE TSD MOS OFF
5.0V ± 5%
ERROR AMP
PWM COMP
– DEAD TIME 11~14 VOUT
+ CONTROL
+
–
3V Low Side OVER CURRENT
1V Vref=6.5V PROTECTION
F/F
2.45V CIRCUIT
OSC LOW SIDE
Q DRIVER
f=250kHz +
R S
–
CLM Vth OVER HEAT
16 P.GND
0.1~0.2V PROTECTION
CIRCUIT
27 32 30 1 2 3 4, 26 9
3.3V/5V AMP- AMPOUT S/S F/B OCL+ GND VGL
OCL-
86
C D E
0
0
Page 82 J4
to MAIN (1) CB117 0
-11.9 0
-11.8 11.4 8
-11.6
0
0.2
4.9
0
-11.8
-11.6
0
-11.9
4.9
4
-11.6
0
0
0.2
0
5.1
3.4
3.4
5.1
0
Page 81 G1
to DIGITAL CB309
2.5 5.1
2.5
0
Page 82 J3
to MAIN (1) CB116
0
2.7
2.7
2.7
0
0
AC4.6V
Page 87 J4
to FL CB945
AC7.9V
2 V OUT
IC25 : PQ12RF1
VOLTAGE ON/OFF Voltage Regulator
REGULATOR CIRCUIT
PWM
5 ON/OFF
COMP.
SOFT
1
START VIN
Q
OSCILLATOR
R
4 O ADJ
S
I C
ERROR
AMP.
VREF
3
3
COM
GND
F G
2.3
9.0
0
0
6.4
6.4
0
3.3
3.3
1.6K
3.3
12.1
2.7
0
0.9
0.4
11.9
0
0
0
-12.0
4.9
0
0
-5.0
s4
IC363 : PQ025EZ5MZP
Voltage Regulator
2 1 3
VO DC INPUT (VIN) DC OUTPUT (VO)
I C
4 2
CV ON/OFF CONTROL (VC)
5
GND
H I
2.4
0
3.3
3.3 1.1
0
2.3 3.3
3.3 J100
0
9.0
6.4
12.4 12.4
0
12.4
3.3
12.4
6.4
12.4
0
6.4
12.1
0
6.4
5.0
0
17.2
6.1
41.6
3.2
0
0
3.2
0.9
0
0
0.3
0
41.7
-41.5
0
17.9
0
17.9 -18.3
0
-18.3
17.9
-18.3
18.4 0
18.4 0
5.2
0
-22.1 -22.6
-22.5
0
EUROPE
IC361 : BA15218F
Dual OP-Amp
OUT 1 8 +V
1 CC
–IN 1 2 7 OUT 2
+ – + –
+IN 1 3 6 –IN 2
–V 4 5 +IN
CC 2
J K L
AC4.0V
AC29.5V
AC64.5V
AC4.7V
* All voltages are measured with a 10M Ω /V DC electronic volt meter.
* Components having special characteristics are marked Z and
must be replaced with parts having specifications equal to those
originally installed.
* Schematic diagram is subject to change without notice.