Megger MIT510 - Page 21

AF008-02-1201
21
Number
Issue
Date
CN Number
6
1
7
2-
999
2
17-01-07
22933
Compiled
By:
S.Mynott
Date
Compiled:
08/08/06
MIT5XX/10XX
1
st
Used On:
SERVICE MANUAL
0VS
BuzzerCtl
R1
100K
Title
Size
Document Number
Date:
Sheet
of
MEGGE R L IMITE D
Archcliffe Road, Dover,
Kent, CT17 9EN, England
Issue Date CN No.Instrument:
Drawn By:
© MEGGER LIMITED
6270-299
Display PCB - Top Level
A4 1 8
Wednesday , March 17, 2004
MIT510/520/1020
James Patten 10 14-10-2005 22482
11 02-11-2005 22500
<Variant Name>
R2
100K
TP332
COL1
5V
TP331
5V
5V
5V
12VSwitched
5V(led)
0V
12VSwitched
0V
0V
0VS
0V(led)
0V
5V
TP333
Controller
IsoSupply En
BatteryChargeDisable
IRDALink[1..2]
BatteryVolts
LcdData[0..8]
LcdAddr[0..2]
CNVss
OnOf fKey -
EnableBatteryVolts
StartStopKey-
Comms[1..4]
HvLedCtl
MainsDetect
LcdLatchReset
LcdLatchEnable
FnKey-
PA[0..3]
COL[0..3]
BuzzerCtl
LcdBiasDisable
ProgLedCtl
0V
5V
PowerOf f
MonoReset
SwitchedOnSink-
MainsLedCtl
/Eng_mode
UP_OK
ComIDbit[0..2]
MeterCoarse
MeterFine
Range250V
Range500V
Range1000V
Range2500V
Range5000V
NoiseLed
WDTKicking
EXTRST
LcdBP[1..4]
/Backlight
Comms1
WDTKicking
IrDA & Backlight
IRDALink[1..2]
0V(IrDA)
5V(IrDA)
IrdaEn
0VS
/Backlight
12V(BL)
PowerManagement
12V
OnOff Switch
CNVss
0VS
OnOf f Key -
5V
12VSwitched
IsoSupply En
IsoSupply Off
PowerOf f
MonoReset
MainsOn
SwitchedOnSink-
0V(led)
5V(led)
5V(IrDA)
0V(IrDA)
0V
WDTKicking
12V(BL)
LcdLatchReset
LcdLatchEnable
(RxD1-edge)
COL0
Page 5
PA0
PowerOff
MainsLedDrv
EXTRST
StartStopKey -
To power board
UP_OK
Range250V
Range500V
Range1000V
Range2500V
Range5000V
ProgLedDrv
OnOff Switch
CNVss
Hv LedDrv
BuzzerDrv
1
3
5
7
9
11
13
15
2
4
6
8
10
12
14
16
1718
1920
<-KEY->
PL13
Edge connector
f or STD board
Comms[1..4]
MainsOn
FnKey-
NoiseLed
COL3
Display
LcdData[0..8]
LcdAddr[0..2]
LcdLatchEnable
LcdLatchReset
LcdBiasDisable
0V
5V
12VSwitched
MeterCoarse
MeterFine
LcdBP[1..4]
OnOf fKey -
/Backlight
MonoReset
CNVss
MainsDetect
(TxD2)
(RxD2)
1
3
4
5
6
7
8
2
9
10
11
12
13
14
SK29
IRDALink1
BatteryVolts
0V(led)
(RxD0)
(TxD1)
(RxD1)
(TxD0)
PA3
IRDALink2
ComIDbit0
12V
EnableBatteryVolts
ComIDbit2
To Comms interface
SwitchedOnSink-
BatteryChargeDisable
Comms2
IsoSupply En
5V(led)
COL[0..3]
12V
/Eng_mode
BattMon
1
3
4
5
6
7
8
2
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
SK2
5V
5V(IrDA)
ChargerOff
Connection to
instrument
Charging
12V(BL)
0V(IrDA)
0V(led)
1
3
4
5
6
7
8
2
9
10
11
12
13
14
SK30
SK5
SK1
PA[0..3]
Page 4
Page 2
Page 3
Page 7
To Key board
Page 6
LcdBP[1..4]
LcdAddr[0..2]
ComIDbit1
B
1
A
2
GND
3
Y
4
VCC
5
&
IC1
74AHCT1G08GW
(RxD1-coms)
(TxD1)
0V
LcdData[0..8]
0V
KeyboardSignalConversion
BuzzerCtl
BuzzerDrv
HvLedCtl
Hv LedDrvProgLedCtl
ProgLedDrv
MainsLedDrvCharging
0V
5V(led)
MainsLedCtl
CNVss
TP6
PowerSignals&RangeLeds
EnableBatteryVolts
BattMon BatteryVolts
MainsOn MainsDetect
ChargerOff BatteryChargeDisable
0V
5V(led) Range250V
Range500V
Range1000V
Range2500V
Range5000V
NoiseLed
0V(led)
MeterFine
MeterCoarse
TP7
Comms3
IrdaEn
5V(led)
IsoSupplyOf f
0V
LcdBiasDisable
5V(IrDA)
0V(IrDA)
ComIDbit[0..2]
0V
5V
12V
0VS
12V(BL)
IRDALink[1..2]
MainsLedCtl
Comms4
ProgLedCtl PA1
Hv LedCtl
COL2
PA2