Heathkit IOA 4200 Manual

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. SCHEMATIC OF THE
HEATHKIT®
TIME-VOLTAGE MODULE
MODEL IDA-4200

NOTES:

1. REFER TO THE CIRCUIT BOARD X-RAY VIEWS FOR THE PHYSICAL
LOCATION OF PARTS.

2. REFER TO THE COMPONENT IDENTIFICATION SECTION FOR THE
TOLERANCE AND RATING 0F COMPONENTS SHOWN ON THE
SCHEMATIC.

3. ALL CAPACITOR VALUES ARE IN uF UNLESS OTHERWISE
INDICATED.

4. ALL RESISTORS ARE 1/4-WATT, 5% UNLESS OTHERWISE
SPECIFIED. ALI. RESISTOR VALUES ARE IN OHMS Ik=1000,
M=I,000.000).

ALL SWITCHES ARE SHOWN IN THE "OUT" POSITION.
ALL GROUND SYMBOLS, POWER SUPPLY CONNECTIONS,CONTROL
SIGNALS, ETC. WITH A DASHED OUTLINE ARE REFERENCEO TO

THE "A/D GND" CONNECTOR. ALL OTHER GROUND SYMBOLS ETC.
ARE REFERENCED TO THE "CHASSIS CND" CONNECTOR

T V INDICATES POWER GROUND
O V INDICATES LOW NOISE GROUND 6LT ,

9, E] INDICATES A WIRE CONNECTION TO THE CIRCDIT BOARD

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BOARDS.

11, T INDICATES A TEST POINT OR TEST CONNECTOR.
12. 'II'INDICATES A CIRCUIT BOARD FOIL SOLDER PAD.
13. O INDICATES PART OF CALIBRATION ASSEMBLY (10071807).

14. 0 WITH A NUMBER INDICATES A SWITCH 0R COMPONENT
LUG CONNECTION.

15. 0 WITH A LETTER, INDICATES A TEST POINT LOCATION FOR
"INITIAL TESTS".

16. O INDICATES A WAVEFORM LOCATION. REFER TO THE "WAVEFORMS
SECTION OF THE MANUAL.

17. CIRCUIT COMPONENT NUMBERS ARE IN THE FOLLOWING GROUPS;
1000-1099 PARTS ON THE MODULE MAIN BOARD IN CIRCUITRY
REEERENCED To THE "CHASSIS GND" CONNECTOR.

1100-1199 PARTS ON THE MODULE MAIN BOARD IN CIRCUITRY
' REFERENCED TO THE "A/D GND" CONNECTOR.

1200-1299 PARTS ON THE MODULE DISPLAY BOARD.

18. O INDICATES VOLTAGE FOR ANY CONTROL SETTING WITH THE
"OFF SWITCH PUSHED IN.

19, C>® INDICATES A VOLTAGE DEPENDENT ON THE DTP CONTROL
SETTING WITH "T" FUNCTION SELECTED AND ADELAY CONTROL
AT CCW.

20. O INDICATES A VOLTAGE DEPENDENT ON THE A DELAY CONTROL
SETTING WITH "T FUNCTION SELECTED AND DTP CONTROL
AT CCW,

21. O INDICATES A VOLTAGE FOR ANY CONTROL SETTING WITH "T"
SWITCH PUSHED IN.

22. O INDICATES AN APPROXIMATE VOLTAGE DEPENDENT ON THE A
TIMEBASE SWITCH SETTING.

23. VOLTAGE IS '55 VDC WITH TRACKING SWITCH PUSHED IN.

24. @INDICATES A VOLTAGE DEPENDENT ON THE Y1 IOR Y2] INPUT
VOLTAGE. VOLTAGES SHOWN ARE FOR YI IOR Y2) INPUT
SWITCH SET TO GND" POSITION.

25. O INDICATES A VOLTAGE DEPENDENT ON THE A/D IU1103I INPUT
VOLTAGE.

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26. OINDICATES A VOLTAGE FOR "ON " OR "OFF" DISPLAY SEGMENTS.

27. @VOLTAGE WHEN "ENABLED" FOR EXT VDC FUNCTION RANGE
GROUPS: I,E,, 2/20 0R 200/2000.

NOTE: ALL VOLTAGES WERE MEASURED AT NOMINAL I120VAC)LINE
VOLTAGE WITH A IDMQIOR HIGHER] INPUT IMPEDANCE DC VOLTMETER.
VOLTAGES ARE MEASURED WITH RESPECT TO THE APPROPRIATE
GROUND CIRCUIT (SEE NOTE 6). VOLTAGES MAY VARY 210% EXCEPT

A S 5 HOW N.
COMM 0 9
Heath Company
Part of 595-2985 Wsm

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