HEWLETT-PACKARD 175A Instruction Manual

$4.99

HEWLETT-PACKARD 175A - It's a complete owner's manual ( also known as operating manual or user guide), and it's in PDF format. After placing order we'll send You download instructions on Your email address. See below for delivery information

The manual is available only in language(s): English

Link to manual will be sent on Your email address after You place order.

This product was added to our catalog on Tuesday 15 April, 2008.

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Othmar Herbst - 01/13/2008

PDF contains : - schematics, but a little un-sharp. - disassembly instructions, accurate drawings - description of test-modes

Dutra Lacerda - 02/17/2008

All schematics for the Euro-PC and some extra info. Needed if you want to replace some missing hardware. A piece of great historical value and for vintage computing entusiasts.

Jacek Madej - 08/30/2008

Hi! love you!! schematics circuit best scan electronics area ...a have old radio grundig c8000 seek from net ... very done... hello best regard Edi from Poland

matt wilschke - 03/07/2008

Essential for popping the top open and cleaning and replacing what needs repalced. One note: the Ornamental Panel is attached with some adhesive as well as screws and faders so don't be shy about prying it open.

Steve Fink - 07/24/2006

Nice, really nice. I was happy to receive manual in true electronic form, instead of scanned original. This manual includes: Wiring diagram, circuit diagram, block diagram, PC board, adjustment, exploded view, PARTS CATALOG and more.. It's full color manual, not B&W or grayscale :)

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Click to see text excerpt from the manual

Section V Model 175A
Paragraphs 5-93 to 5-98
Table 5-
Procedure Effect Trouble
Connect DC Voltmeter to pin 2 of V204. 0 volt reading impossible R262 or V203
Adjust HORIZONTAL POSITION for
reading of 0 volt. ?V J j.7 I Correct reading Input circuitry good
Measure voltages at pin 1 of V204 and Voltages unequal V204 or V205
pin 1 of V205
Voltages approx equal V204 and V205 good
Measure voltages at pins 3 and 8 of V208 Voltages unequal V208 or V209
Voltages approx equal V208 and V209 good
5-93. HORIZONTAL AMPLIFIER. 5-97. UNBALANCE. The cause of unbalance in the
horizontal amplifier will most likely be associated
5-94. Signal waveforms and their associated dc levels with V204, V205, V208, or V209 since these are the
are given as a troubleshooting aid on the horizontal- only stages connected in the differential configuration.
amplifier schematic diagram, figure 5-29. Measurement of dc voltages on each side of the
amplifier is the best method to use to isolate the
5-95. If the horizontal amplifier appears to operate cause of unbalance because of the feedbackused in the
properly with the HORIZONTAL DISPLAY in any of amplifier. Proceed as in table 5-8.
the external input positions, but not in internal sweep
positions, the trouble is most likely in the sweep
generator. 5-98. GAIN. If the amplifier has the wrong gain,
ensure that it cannot be corrected by adjusting Gain
5-96. If the horizontal amplifier appears to operate Adj R213, X1 Gain Adj R225, or X10 Gain Adj R227.
properly with the HORIZONTAL DISPLAY in the The waveforms given on the schematic diagram, fig-
internal sweep positions, but not in any of the external ure 5-29, provide information on the gain of each
input positions, the trouble is most likely associated stage. Start at the input and proceed toward the
with the horizontal input amplifier. deflection plates.
5-18 01526-1