Heathkit ID 4001 Schematic 3

Page 1

WAVEFORMS

1V/ DIVISION
2msec/Div

(D 1V/DIVISION

SCHEMATIC OF THE
HEATHKIT®
DIGITAL WEATHER COMPUTER
MODEL ID-4001

Copyright © 1978

Heath Company

All Rights Reserved

Part of 595-2 135-01 Printed in the United States of America

1. COMPONENTS ON THE CIRCUIT BOARDS AND CHASSIS ARE
IN THE FOLLOWING GROUPS;
101-199 DISPLAY CIRCUIT BOARD.
201-299 CPU CIRCUIT BOARD.
301-350 FRONT PANEL/ CHASSIS.

401-450 BACK PANEL/ POWER SUPPLY CIRCUIT BOARD.
501-550 FRONT PANEL CIRCUIT BOARD.
601-650 SENSOR CIRCUIT BOARDS.

2. RESISTORS ARE 1/2 WATT 10%, UNLESS MARKED OTHERWISE.
VALUES ARE IN OHMS I K=1000, M=1,000,000 I.

3. CAPACITOR VALUES LESS THAN 1 ARE IN uF. CAPACITOR
VALUES 1 OR ABOVE ARE IN pF UNLESS MARKED OTHERWISE.

4. QTHIS SYMBOL INDICATES A DC'VOLTAGE MEASURED FROM
THE POINT INDICATED TOGROUND. MEASUREMENTS WERE
MADE WITH A HIGH IMPEDANCE VOLTMETER.

5. ** VOLTAGES SUBJECT TO CHANGE WITH PRESSURE
Q TRANSDUCER VARIATIONS.

6. VTHIS SYMBOL INDICATESACIRCUIT BOARD GROUND.
7. 3? THIS SYMBOL INDICATES A CHASSIS GROUND.

8. --ev>-TH|S SYMBOL INDICATES A PLUG-TO~SOCKET CONNECTION.
THE NUMBER FOLLOWING THE PLUG NUMBERS INDICATES
THE PARTICULAR PIN NUMBER. FOR EXAMPLE: PlOl-l
MEANS PLUG P101 PIN l.

9. O THIS SYMBOL INDICATES A WAVEFORM DISPLAY AT THAT
POINT. THE WAVEFORM FREQUENCY AND AMPLITUDE ARE
SHOWN ON EACH DISPLAY.

T EFTdN-T'STVI-TEH """""""""""""""""""""""""""""""" "
! CIRCUIT BOARD

___.._._

I
I
CLEAR f-TEMPERATURE PRESSURE WINE)1 I
R PEA WIND
MIN MAX cwI-IIILDL. MIN MAX CHANAQEE/HR. GUS:f AVG : OFF
I ON
0 O O O O O O O O O O 0 fl.
sw502 swso3 swso4 swsosQ swsos SW507 swsoa swsog I
05 O7 0.502 05 03 0504 0508 0509 I
56-56 56-55 56-56 56-56 56-56 :56-56 I
_g A H I
--AU- AU - -IAs- A5 - - «AP-AP - - {AU AD kfi- - -IAC}{ACI-- - --I
z Z S 8 3 7 a a R
g 331 [I o o If; g 3 o o
L.- -n f I
4- I-
1 . .L
-I I
I I P
T
)-
Q d 0 z _I I Z
2* E g E g g a: :3
II- x: z I rt- I- D l- y-l- 0- IL I- _, Z 3 _I )_ I-
~---- - iagééieIéiaiéa E R_ 3 S i
-- w}-- - - - - - - -- - - - - -' - ET-ETELT-Ea-WMIM - EEIIAMRPF-EEIIegI-MF---NT-"- EET- -- - Te -- - {Ac - - - -E§I---
-01 2403
80 {3%
B
J
E as we. tags; :23. 2:33;. #336 +53% TEAS urge; x2622
I I L