HP 710B Parts list manual

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INSTRUCTION AND OPERATING MANUAL
FOR
MODEL
710B
POWER SUPPLY
Serial and Above
X26
HEWLETT-PACKARD COMPANY
395 PAGE MILL ROAD, PAL0ALTO, CALIFORNIA, U.S.A.

CAUTION
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VOLTAGES WHICH ARE DANGEROUS TO LIFE ARE PRESENT
--
AT THE TERMINALS AND WITHIN THIS INSTRUMENT
I__--- ----
CAUTION
IF THIS INSTRUMENT IS EQUIPPED WITH 6L6 METAL TUBES
--_I_-- --__-
A DANGEROUS VOLTAGE MAY BE PRESENT BETWEEN THE
- -- - -______p.
-.
_-----
6L6 METAL TUBE SHIELDS I AND THE CHASSIS.
-____c
G enera1 Descriotion
I
Model 710B Power Supply is an excellent source of direct current
power for laboratory and production use.
vo%tageand applied load for any setting.
for any condition of operation.
The voltage output
is continuously
The noise and hum level
is very low
I
variable between 100 and 360 volts and is practically in&pendent of either line
An alternatilng current output of 6. 3 volts, center tapped, which will
supply a maximum
of 5 amperes is included in the power supply for supplying
the filament,s of tubes.
,
This power supply may be used bo power low Bevel amplifier, constant
frequency oscillators, and any other equipment requiring a power supply of high
stability and
low noise level.
P arts Substitutions
- - P -~
Difficulties in procuring some of the parts used in this instrument may
cause the electrical or physical values
to deviate from those shown in this in-
struction manual. These substntukions have been made so
as not to impair the
performance of this instrument.
is necessaryo eit,her the substitute value or the original value may be used.
Whenever replacement of any of these parts
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INS T RUC TIONS
MODEL '7lOB
POWER SUPPLY
Soecifications
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Regulated Output Ratings:
--
Voltage: 100 to 360 volts DC.
Current:
0 to '75 MA.
Maximum Output Ratings:
Current: 100 MA.
Filament Supply:
6.3 volts AC COT. at 5A.
Regulation:
Approximately 1%for operating conditions within the Regulated Output
Ratings and for line voltage variations of 105 to 125 volts /210 to 250
volts
0
Noise and Hum:
Total noise and hum
is less than ., 005 volts for operating conditions with-
in regulated Output Ratings.
1-- . ~
Required Power Source:
Voltage: 105 to 125 volts/210
to 250 volts,
Frequency: 50
to 60 cps.
Wattage:
90 watts maximum.
Overal Dimensions:
8-3/4tt high x '7-3/411 wide x 11-5/8" deep.
Weight:
15 pounds.
Operating Instructions
Inspection
- -
This instrument has has been thoroughly tested and inspected before being
shipped and
is ready for use when received.
-1-

After the instrument is unpacked, it should be inspected for damage re-
ceived in transit.
lined in the "Claim for Damage in Shipment" page
at the back of this instruction
book.
If any shipping damage is found, follow the procedure out-
Controls and Terminals
--
DC ON - This switch controls the direct current supplied to the DC
binding posts and indicator lamp which
is lighted while there is voltage on
these binding posts.
AC
ON - This switch controls the power supplied to the instrument from
the power line.
VOLTAGE CONTROL
- This variable resistor varies the direct current
output voltage.
FUSE .25 AMP - The fuseholder, located on the control panel, contains
The fuse may be replaced by unscrewing the fuse-
a -25 ampere cartridge fuse.
holder cap and inserting
a new fuse.,
FUSE
1. 6 AMP - The fuseholder, located on the control panel, contains
The fuse may be replaced by unscrewing the fuse-
a 1.6 ampere cartridge fuse.
holder cap and inserting
a new fuse.
a 230 V power line, an .8 ampere fuse should be used.
this instrument must be of the "Slo-blo" type
as specified in the Replaceable
Parts List.
Whenever the instrument
is operated from
Replacement fuses for
tDC -B GND - These three binding posts are the DC output terminals and
the chassis ground terminal.
CT,
6. 3V - These three binding posts are connected directly to the 6. 3V
secondary of the power transformer.
tap of this secondary. The CT terminal
is connected to the center
Power Cable
- The power cable consists of three conductors. Two of
these conductors carry power to the instrument while the third conductor (green
wire)
is connected to the instrument chassis. The third wire projects from the
cable near the plug end of the cable and may be connected to
a ground when it is
desirable to have a grounded instrument chassis,
Operation
--
CAUTION - AVOID ELECTRIC SHOCK BY TURNING THE DC SWITCH
TO THE OFF POSITION BEFORE
MAKING ANY CONNECTIONS.
,
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Connect the output terminals of the Model 710B to the load and connect
the power cable
to a 105-125 volts supply.
AC
ON, and allow the instrument to warm-up for about two minutes.
the VOLTAGE CONTROL for the desired voltage.
Turn the toggle switch to
DC ON,
Adjust
The Model 710B may be operated with either terminal of the
DC output
grourded. Anyone of the three 6.3 terminals may be ground.
The instrument may be operated with th? DC output ungrounded.
usually results in
a slightly higher hum level Ixlt this may be corrected by
reversing the power cable plug or by connecting a -05
mf capacitor from either
the +DC or
-DC terminal to the GND terminal.
This
Maintenance
CAUTION
- Voltages which are DANGEROUS TO LIFE are present with-
in this instrument.
the cover or bottom plate
is removed.
Disconnect the instrument from the power line whenever
Cover and Bottom
Fl ate Removal--
Remove the cover by unscrewing the ten screws located along the top and
rear edges of the cover.
screws, one in each corner of the plate,
The bottom plate can be removed by unscrewing four
Tube Replacement
--
Any tube in this instrument may be replaced with a new tube having RMA
standard characteristics, without impairing the operation of the instrument.
Tubes with abnormal characteristics will usually cause poor regulation.
Voltage Control Adiustment
--
If the VOLTAGE CONTROL shifts so that it does not give a voltage range
of from 100 to 360 volts, adjustment of R23 and R24 will be necessary.
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Model 710B Top View Cover Removed
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Model 710B Bottom View Bottom Plate Removed