Heathkit ID 4001 Schematic 2

Page 1

AM
mm

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FALLING

WAVEFORMS

1V/DIVISION

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4 Am

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NOTES:

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I, COMPONENTS ON THE CIRCUIT BOARDS AND CHASSIS ARE
IN THE FOLLOWING GROUPS:
101-1 DISPLAY CIRCUIT SOARD.
ZOITZW CPU CIRCUIT BOARD:
SDI-350 FRONT PANEL/ CHASSIS:
401-550 BACK PANEL] POWER SUPPLY CIRCUIT BOARD
501-550 FRONT PANEL CIRCUIT BOARD.
601-650 SENSOR CIRCUIT BOARDS.

RESISTDRS ARE [/2 WATT 107-, UNLESS MARKED OTHERWISE:
VALUES ARE IN UHMS I K-IUUU. MI,flDfl,flDII I.

)4 CAPACITOR VALUES LESS TNAN I ARE IN UE. CAPACITDR
@ 5V/D'V'5'ON @ 1VIDIVIS|ON VALUES I 0R ABOVE ARE IN DF UNLESS MARKED OTHERWISE

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A. OTHIS SYMBOL INDICATES A DC VOLTAGE MEASURED FROM
THE POINT INDICATED To GROUND MEASUREMENTS WERE
MADE WITH A HIGH IMPEDANCE VOLTMETER.
5. 1 VOLTAGES SUBJECT TD CHANGE WITH PRESSURE
TRANSDUCER VARIATIONS.
e. V TRIS SYMBOL INDICATES A CIRCUIT BOARD GROUND
II .=_ THIS SYMBOL INDICATES A CHASSIS GROUND.
WIND DIREQTJQN _5__E_N§QB _____ 1 I 5. -»-THIS SYMBOL INDICATES A PLUG-TO-SOCKET CONNECTION.
F'TSS'EIREDIT BOARD I. 1 THE NUMBER EOLLowING THE PLUG NUMDERS INDICATES
a 7 I THE PARTICULAR PIN NUMBER. EOR EXAMPLE PIDI-I
wVT mg 3-3 I MEANS PLUG PIuI PIN 1.
.TE m .. , I
H I v. 0 THIS SYMBOL INDICATES A WAVEEDRM DISPLAv AT THAT
' POINT, TNE WAVEEDRM EREDUENCV AND AMPLITUDE ARE
| SHOWN ON EACH DISPLAY.
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SCHEMATIC OF THE
HEATHKIT
DIGITAL WEATHER COMPUTER
MODEL [0-4001

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F RESSURE CHART
RECORDING BUFFER

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