Heathkit IM 4190 Schematic

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Extracted text from Heathkit IM 4190 Schematic (Ocr-read)

Page 1

NOTES:
1. RESISTORS ARE lid-WATT, 1x TOLERANCE UNLESS
PICKUP ASSEMBLY OTHERWISE NOTED. LK=IOOOL
'N >> . 2. REFER T0 was "CIRCUIT BOARO X-RAY VIEW" FOR
J? 5 THE PHYSICAL LOCATION OF PARTS-
3 PHASE.
' COMPENSATION
TAB
STROBE
°ZFJLEJ INTEGRATED
cmcurr ICI
INV.
INPUT 9 0 OUTPUT
NON-INV. OFFSET
INPUT 6 NULL
0 v- AND CASE
3.»:
94% g

SCHEMATIC OF THE

HEAIHKII©
BIDIRECTIONAL RF WATTMETER

DJ!

3. :1:- THIS SYMBOL INDICATES A COMMON GROUND.

4. THIS SYMBOL INDICATES A CIRCUIT BOARD
GROUND.

5. THIS SYMBOL INDICATES A CIRCUIT BOARD
WIRE CONNECTION.

6.R_*INDICATES A 15009 CALIBRATION RESISTOR OR
JUMPER WIRE THAT MAY 0R MAY NOT BE INSTALLED
IN THE INDICATED LOCATION.

7.+THIS SYMBOL INDICATES A CLOCKWISE ROTATION
OF A CONTROL.

8 SWITCH SW1, WITH WAFERS A AND B, IS SHOWN AS
VIEWED FROM THE REAR 0R CIRCUIT BOARD END.
SWITCH IS IN THE "BATTERY CHECK POSITION.

9. THE PICKUP ASSEMBLY IS FACTORY CALIBRATED
AND SHOULD BE SERVICED ONLY BY QUALIFIED
TECHNICIANS USING LABORATORY-STANDARD
INSTRUMENTS.

100K
-" 9V.
9.32 .22.
....- 7:0?
5%
MI
407-727

MODEL IM/SM-4190

Panof595~1931 mmmmmam