Radio Shack TRS-80 Service Manual page 120

DISK CONTROLLER BOARD
PARTS LIST (Cant'd)
MANUFACTURER'S
RADIO SHACK
SYMBOL DESCRIPTION
PART NUMBER
PART NUMBER
INDUCTORS
L1 390ph 841·9003
ACA8058
L2
300""
841·9003
ACAB058
L3
68"",,
841·9004
ACAB057
INTEGRATED CIRCUITS
3A
Mel733
805-0733 AMX4326
4A
NE592A
805.0592 AMX368S·
28
7406, Buffer and Interface gate
801.0406
AMX3675
38
74lS20, Positive NAND gate
802.(l(120 AMX3555
48
74LS20. Positive NAND gate B02.Q020
AMX3555
58
MSM311 El Precision Comparator 805-3011
AMX4327
2C
75463, Dual Peripheral Positive OR 8OS-D463 AMX4329
Driver
3C
74123, Retriggerable 800·0123
AMX3955
Monostoble Multiyibrator
4C
74lS74, Flip·Flop 802.0074 AMX3558
50 74LS74, Flip-Flop 8020074 AMX3558
3D
74LS04. Positive NAND gate 802.()()(l4 AMX3552
40
75462. Dual Peripheral Positive 8OS.Q462 AMX4321
NAND Drivet'
50
74lSB6,
Quadruple
2·input
802-0086
AMX3701
Exclusive OR gate
lE
"DIP Shunt, IS-pin 848-9001
AL0907
2E 74LS14, Sctlmitt-Trigger PO$itivc 802-0014 AMX3716
NAND gatt!
3E
7407. Buffer and Interface gate 801-0407 AMX3684
4E
75462, Dual Peripheral Positive 805-0462 AMX4321
NAND DrlvfI"
5E
74L$221, Dual Monoslable Mulli-
802.0221 AMX3810
vibrator
wI
Schmitt-Trigger inputs
1F
7438, Buffer and Interface Gate
8000038
AMX·3683
2F
8·Re$i$lor Network 829.()OO7 ARX0181
'F 7438, Buffer and Interface Gate
8000038 AMX·3683
RESISTORS
Rl
B.2K.J4W,5"
820-7282
AN0271EEC
R2
8.2K, %\\',5% 820-7282
AN0271EEC
R3
8.2K, %W, 5%
820·7282 AN0271 EEC
R'
27K, YOW, 5%
820·7327
AN0316EEC
R5
27K, YOW, 5% 820-7327
AN0316EEC
R6
3.6K, YOW, 5%
820-7236
AN0235BEC
R7
1K, 'toW, 5%
820·7210
AN0196EEC
I
I
I I
R12
1K, %\\'. 5%
820-7210
ANOt96EEC
R13
1.2K, %W, 5%
820-7212
AN0199EEC
R14
150 ohms, %W, 5%
820-7115
AN0142EEC
R15
Not Used
R16
lK,%W,5%
820-7210 AN0196EEC
R17
lK.%W.5%
820-7210
AN0196EEC
113