HEWLETT-PACKARD 650A Instruction Manual

$4.99

HEWLETT-PACKARD 650A - 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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Mark Tarkett -

Excellent service, good price, products are excellent. Will do business with this vendor again.

Glen Meyer - 10/26/2008

Very fast service, manual is well scanned and clear, but the Appendix A containing PC Command table and Control codes are missing

Nadia Yakunina - 06/19/2007

It was so difficult to find this manual on the internet - thanks a lot for making it so easy and simple. Incredibly handy. AND. It looks you make so many people happy for such small money. Good job!

Anny ROY - 04/06/2007

Super fast service and document of excellent quality. Thanks

Henry Seiden - 02/26/2009

I downloaded this product and looked through it quickly with Adobe Reader v9. It is clean and a good copy. Some scanned pages are not perfectly square, but that is a minor complaint. The document schematics and board diagrams are easy to read, of good contrast. The whole file downloaded quickly. This is a good service! Sony charges about $100 for the printed version of the same manual. It is still available through their print-on-demand pro parts system, but why would you do that?

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Click to see text excerpt from the manual

e. Check for a 60 cps beat. See paragraph 4-5. nient develops trouble symptoms not covered by this
chart, repair analysis will be simplified if the Circuit
f. Make a final recheck of frequency calibration on Description given in this manual is used to obtain a
all six ranges. Make any adjustments found to be complete understanding of the instrument circuitry.
necessary. In case of persistent trouble. contact your -hp- Sales
Engineering Representative or the -hp- Factory Serv-
ice Department directly.
g. Check instrument response to line voltage change.
See paragraph 4-5.
All circuit references refer to Figures 4-9 and 4-10
h. Check output impedance and maximum output volt- unless otherwise noted. Signal. ac. or dc voltages
age. See paragraph 4-5. when mentioned here. are measured between the in-
dicated points and the chassis unless specified other-
4-7 TROUBLE SHOOTING wise.
Notes given in Table 4-2 are based on -hp- experience. Tubes with standard RETMA characteristics can be
The more common troubles. their symptoms, and used for tube replacements as explained in paragraph
remedy are given. 4-4. In a great number of cases, instrument trouble
can be traced to a defective tube. Avoid transposing
It is beyond the scope of this manual to include all tubes of the same type in their respective sockets as
possible or obscure and rare troubles. If an instru- this may disturb instrument adjustment.
TABLE 4-2. TROUBLE SHOOTING
SYMPTOM CAUSE AND/OR REMEDY
Dead on all ranges. Blown line fuse
Tube V13, V14, or V15 defective.
Rectifier V10 defective.
No. B+ voltage.
No B+ voltage or Low B+ voltage. Rectifier V10 defective.
Tubes V6 and/or V7 defective.
Tube V8 shorted.
Choke L7 open.
Resistor R37 open.
Defective filter capacitor.
R34 open.
High B+ voltage. Cannot be adjusted by Tubes V6 or V7 shorted.
R35 control.
Tubes V8 or V9 defective.
Resistor R36 open.
[nstrument blows line fuses. Shorted rectifier V10.
Shorted filter capacitor.
Choke L7 shorted to chassis.
Defective power transformer.
Shorted heater wiring.
Power supply will not regulate with varying Defective tube in regulated power supply.
line voltage.
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