Hitachi SJ700-2 Series service manual Control board

6-1

P N R S T PKD PD SCRG N RB BRDG NN XG YG ZG UE VE WE UG VG WG P U W OH1 THF THP THCOM FF1 FF2

		Inrush current				Temp.	Fan rotation
		limit circuit			Current				PV24
							error detect
					detect (U)	error
CB circuit						detect	(CM1)		CM1
		Thyristo r drive				Current
	Inst. power		BRD drive circuit	Lower arm dri ve circuit	Upper arm driv e circuit
Phase fail detect		circuit				detect
	failure detect		(suppress cir cuit)	(suppress cir cuit)	(suppress cir cuit)	(W)		UV detect	R0
		(incl. suppress ci rcuit)					Power supply
									T0
							for GA (5V)

Opt

Opt

Opt

Opt

Power supply

Opt

Opt

Power supply

Inst. power

coupler

coupler

coupler

coupler

coupler

coupler

Power

Power

Power

Power supply

for THY gate

for IGBT

failure detect

(5V)

lower arms

supply for

supply for

supply for

Power supply for

for control

Power supply

IGBT upper

IGBT upper

IGBT upper

control (+-12V)

for I/F (24V)

(PV15)

(5V)

arm (U)

arm (V)

arm (W)

Opt

Opt

coupler

coupler

RPHF

RPHF

RPHF

IPL

SCR

BRD

STR

GX

GY

GZ

GS0

GU

GV

GW

UN

VN

WN

P

IUF

IWF

PV12

L

NV12

OH

PV5

L

PV5N

PV24

CM1

FAN

UV

IPL

(N)

(N)

(N)

(N)

(N)

(L)

(N)

(N)

(N)

(N)

(N)

(N)

(N)

(N)

(N)

(N)

(N)

(N)

(L)

(L)

(L)

(L)

(L)

(N)

(L)

(L)

(N)

(CM1) (CM1)

(N)

(N)

(L)

Voltage division

circuit

Phase

OV detection

voltage

GA

detection

(5V)

f - theta detection

Isolation AMP

Opt

coupler

Opt

Opt coupler

Opt

Opt

High speed

Opt

Opt

Opt

coupler

coupler

coupler

opt coupler

coupler

coupler

coupler

(U-V)

(W-U)

BRD

IUF

IWF

GARXD

TRES

GARES

GASCK

GASRS

TRIP

PHF

US

VS

WS

GS

VDC

MVF1

MVF2

THF

THP

THCOM

PV12

PV12

L

L

NV12

NV12

FFLT

PV5

PV5

PV5

PV5

L

L

L

PV24

PV24

CM1

CM1

IPL

Main board

(L)

(L)

(L)

(L)

(L)

(L)

(L)

(L)

(L)

(L)

(L)

(L)

(L)

(L)

(L)

(L)

(L)

(L)

(L)

(L)

(L)

(L)

(L)

(L)

(L)

(L)

(L)

(L)

(L)

(CM1)

(CM1)

(CM1)

(CM1)

(L)

apprx. 6.4 V at

40 signals between Main

OV level

board and contro l board

Power supply for analog signal

Power supply for digital signal

Power supply for I/F

"H" when

+-3.3Vpeak at

"L" when

"L" when

for communication.

PWM signal

"L" when

Signals for freq.

Temp.

Temp.

BRD is ON

rated output

tripping

phase loss

Operates during

gate

matching

detection on

detection on

"H" when

stopping.

suppress

heatsink

PCB

inst. power

failure

Control board

BRD

VDC

IUF

IWF

TRIP

PHF

GARXD

TRES

GARES GASCK GASRS

US

VS

WS

GS

MVF1

MVF2

THF

THP

L

PV12

PV12

L

L

NV12

NV12

FFLT

PV5

PV5

PV5

PV5

L

L

L

PV24

PV24

CM1

CM1

IPL

AVR

Overcurrent

detection

Output

SH Microprocessor (3.45V)

shutoff circuit

A/D

D/A

10bit

A/D

12bit

Slide switch S1

Emergency

Stop

P24

CM1

CM1

PLC

FW

8

7

6

5

4

3

2

1

TH

FM

CM2

15

14

13

12

11

AL0

AL1

AL2

H

O

O2

OI

L

AM

AMI