IBM 3274 51C Maintenance Information page 306

TPA08
D
0
0
o
TPA06
TPA
o
TPAOS""
0
o
0
0
TPB060
0 0 0 0
o
TPB01
TPB
TPC030 0
o
TPC01
TPC
o
0 1
TPD
TPD020
o
TPD01
0
0
0
TPE
0 0
o TPE01
TPF
0 0
o TPF01
TPG
0 0
0
TPG01
TPH
0 0 0
TPH01
0 0
o TPLD2
0
0
0 0
o TPLD1
0 0
TH
0 0
I
mliU! II lif!
~I
0 0
0 0
8
D
0
0
110 CP
0 0
0 0
0 0 18
D
TPAMP20
o
TPAMP1
B A
o
TPCTO
E!)
o
TPCTl
1
SCP
LEDCP
4
14
HCP
0 0 0 0 0 0 0 0 0 0 0 0
D II
0
0
Stepper Motor Connector
D
LEO Connector
D
PTX Connector
A01 +24V
A01 diskette 2,20 ground A01
diskette 1 col (+5V)
A02 blank A02 blank A02 blank
A03 MC-3 A03
diskette 2, 20 ground
A03 diskette 1 PTX emitter
A04
MC-2
A04 blank A04
diskette 2,20 PTX emitter
A05 MC-l A05
diskette 1 grou nd
A05 diskette 2,20 col (+5V)
A06 MC-O
A06 diskette 1 anode
D
Head Connector
II
I/O Interface Connector
AOl not used AOl -5V
A02 blank A02
power supply ground
A03 head 0 read/write coil
A03-A18 ground
A04 head 0 center tap BOl +5V
A05 head 0 read/write coil B02 blank
A06 head 0 erase 803 +24V
A07 head 0 erase common 804
+index
A08 ground B05
+diskette 2 sense
A09 ground 806
+write/erase sense
Al0 head 1 erase common 807
+file data
A11 head 1 erase B08 +inner tracks
A12 head 1 read/write coil B09
+erase gate
A13
head 1 center tap 810
+access 0
A14 head 1 read/write coil Bl1
+select head 1
B12 not used
II
Solenoid Connector B13
+access 1
B14 +write gate
AOl not used
B15 +head engage
A02 blank B16
+switch filter
A03 +head load
B17 write data
A04 -head load
B18 not used
Figure F-42. Diskette Drive Card Connector Pins
Appendix F. IBM 51TD Diskette Drive Maintenance F-63