MinXray PowerPlus HF120HPPWV User manual

HF120/60HPPWV PowerPlus™
SERVICE MANUAL
1st edition ( 14, February 2005 )
This manual is established for repair and adjustment of the MinXray model HF120/60HPPWV
portable x-ray unit. Copy and transfer without notice is prohibited.
Section Contents Page
1.0 Introduction 1
2.0 Device history 2
3.0 Specifications 3
4.0 Operating procedures 5
5.0 Main parts 7
6.0 Pre-adjustment 9
7.0 Re-adjustment of kV 13
8.0 Re-adjustment of mA 15
9.0 Re-adjustment of pre-heat value 17
10.0 Re-adjustment of exposure time 20
11.0 Sample of output waveform 21
14.0 Measure mA by mA jack output 24
15.0 Wiring diagram 25
16.0 Schematic diagram 26
17.0 Trouble - shooting guide 35
18.0 Standard data 38
Appendix. Parts list

38
16.0 STANDERD TEST DATA
LEAKAGE RADIATION
a. Test method:
1. Set kV to 120 kV, and timer to 1.0 sec.
2. Set x-ray dosemeter as following settings.
distance: 1 m, range: 0 – 0.1 mR ionization chamber: 353cm
3. Set chamber as following direction.
4. Close collimator set, and make exposure.
5. Measure value of mR.
Calculations: mR/h = ( raw test data ) mR ×3600 ×( duty cycle )1 / 60
b. Instruments: Model 37D Portable X-ray dosemeter Serial No. 5 - 6
Manufactured by D. A. Pitman Ltd.,
topveiw B C D
A E
H G F
I J K
sideview
L M N
c. Sample raw test data:
A B C D E F G
mR 0.004 0.011 0.016 0.006 0.005 0.004 0.042
H I J K L M N
mR 0.016 0.048 0.030 0.009 0.044 0.028 0.008
d. Calculations: mR/h = (raw test data)mR x 3600 x (duty cycle) 1/60
A B C D E F G
mR/h 0.24 0.66 0.96 0.36 0.30 0.24 2.52
H I J K L M N
mR/h 0.96 2.88 1.80 0.54 2.64 1.68 0.48

1
1.0 INTRODUCTION
This service manual is for the MinXray model HF120/60HPPWV PowerPlusTM x-ray unit.
If you have any questions or need further assistance, please contact us. We are available Monday
- Friday, 8:30 - 17:00 Central Time.
Service Department
MinXray, Inc.
3611 Commercial Avenue
Northbrook, Illinois 60062-1822
U.S.A.
Tel: [phone]
Toll free tel: [phone] (U.S. and Canada)
Fax: [phone]
E-mail: service @ minxray.com
Internet: www.minxray.com
Always connect the power cord to a grounded AC mains electrical outlet.
High voltage is present in some internal components.
X-radiation is emitted during some calibration tests described within this
manual.
Observe radiation safety precautions when conducting these tests.
CARELESS OR IMPROPER USE OF X-RAY EQUIPMENT CAN BE EXTREMELY HAZARDOUS.
It is imperative that this equipment be operated and serviced only by trained personnel familiar with
the safety precautions required to prevent excessive exposure to primary and secondary radiation,
the dangers of exposure to x-radiation, and the proper use of the equipment and instrumentation
discussed in this manual. All personnel authorized to operate or service this equipment should be
fully acquainted with the established maximum permissible doses, safety recommendations and
procedures for working with high voltage components, and testing and calibration instrumentation.
Although this x-ray unit incorporates protective design features for limiting both the direct (primary)
x-ray beam and the secondary radiation produced by this beam, design factors alone cannot
prevent human carelessness, negligence, or lack of knowledge. This apparatus is sold with
the understanding that the user assumes sole responsibility for radiation and electrical safety, and
that MinXray, Inc., its agents and representatives, do not accept any responsibility for:
1. Injury or danger to patient or other personnel from x-ray exposure or electrical shock.
2. Overexposure due to poor operating techniques or procedures.
3. Equipment not properly serviced, installed, or maintained in accordance with operation and
service manuals.
4. Equipment which has been modified or tampered with in any way.

2
2.0 DEVICE HISTORY
ItemNo. Contents StartSerialNo.
1 Pre-production ( 5 sets ) 28151

3
3.0 SPECIFICATIONS
POWER : Range -------------------------------------
Minimum voltage with no load ---------
Maximum voltage with no load --------
Frequency ------------------------------------
Electricity consumption -------------------
Maximum voltage consumption --------
Line Voltage regulation ----------------
100 ～260VAC
100VAC
260VAC
50/60Hz
Minimum Maximum
120V 19A(120kV) 30A(50kV)
230V 9A(120kV) 16A(50kV)
3.5kVA ±10%
4.8%
OUTPUT: Inverter: 3kW ･40 kHz high frequency inverter system with
neutral ground
tube potential feedback system
tolerance ±10%
Filament circuit : 0.5 Watt ･45 kHz inverter
tube current feedback system
tolerance ±10%
pre-heat time : approximately 3 sec.
X-RAY OUTPUT :
Tube voltage : tolerance ±10%
Maximum tube voltage : 120 kV
Minimum tube voltage : 40 kV
kVswitch: 2kVstep
Tubecurrent: tolerance ±20%
60 mA(0.01-0.1sec), 42 mA (0.11 – 5.0sec) @ 40 - 50 kVDC
50 mA(0.01-0.1sec), 35 mA (0.11 – 5.0sec) @ 52 - 60 kVDC
45 mA(0.01-0.1sec), 31.5 mA (0.11 – 5.0sec) @ 62 - 70 kVDC
38 mA(0.01-0.1sec), 26.6 mA (0.11 – 5.0sec) @ 72 - 80 kVDC
33 mA(0.01-0.1sec), 23.1 mA (0.11 – 5.0sec) @ 82 - 90 kVDC
30 mA(0.01-0.1sec), 21 mA (0.11 – 5.0sec) @ 92 - 100 kVDC
20 mA(0.01-0.1sec), 14 mA (0.11 – 5.0sec) @ 102 - 120 kVDC
Exposuretimer: tolerance ±10%+1msec
0.01 – 0.2 sec. 0.01sec step
0.2 – 0.5sec. 0.02secstep
0.5 – 1.0sec. 0.05secstep
1.0 – 5.0 sec. 0.1sec step

4
X-RAY TUBE : Superior x-ray SXR-130-15-1.2
focalspotsize: 1.2mm×1.2 mm
target material : tungsten
target angle : 14゜
anode heat storage capacity : 65kHU
COLLIMATOR : Advantech Model R72/32
Continuously adjustable light beam type with central ray indicator, and
cassette size/distance indicator to aid in correct positioning.
Ontime: 30sec.
Bulb : OSRM HLX-100W-12V
illuminance : over 160 lux at 1 m SID
Contrastratio: over3:1at1mSID
FILTRATION : inherent filtration( tube head ) 2.2 mm Al
collimator filtration 1.0 mm Al
totalfiltration 3.2mmAl
WEIGHT : 38.6lbs ( 17.51 kgs )
SIZE: 11.5”(29.2cm)W ×8.81” ( 22.4 cm ) H ×16.25” ( 41.3 cm ) L
POWER CORD : 20 feet ( 6.1m )
EXPOSURE SWITCH CORD : 25 feet ( 7.6 m )
FUSE : 30A @ 125V
Specifications subject to change without notice.

5
4.0 OPERATING PROCEDURES
CONNECTION : After confirming POWER CORD and EXPOSURE SWITCH are intact, securely
connect them to main body of x-ray unit.
(If connector has lock, confirm it is locked.)
Confirm POWER SWITCH is OFF and connect POWER CORD to wall outlet or
wallsocketofpropermains.
(When you use an extension cord, 3.5 kW should be obtained.)
POWER ON : Set POWER SWITCH on the back of the HF120/60H to ON.
Each indicator will illuminate.
DO NOT SWITCH ON AND OFF QUICKLY IN A SHORT TIME. WHEN TURNING
ON AGAIN AFTER TURNING OFF, WAIT FOR AT LEAST 1 MINUTE.
OTHERWISE, THE HIGH FREQUENCY INVERTER CANNOT WORK PROPERLY.
kV SETTING : Set kV in the range of 40 kV to 120 kV.
TIMER SETTING : Set timer in the range of 0.01 sec. to 5.00 sec. depending on subject, distance
and screen/film combination.
mA SETTING : No adjustment.
SELECTION OF sec OR mAs INDICATION:
You can choose the sec or mAs indication by the switch.
( refer page 8.)
MEMORY FOR TECHNIC FACTOR:
Five different technique settings can be stored in memory for quick recall on
the HF120/60H PowerPlus. To store a technique setting, press the Memory
Storage button MR then press memory Recall button M1. This will store the
technique setting displayed in memory position M1. Repeat this process for
storing the different technique setting in M2-M5 as desired. Stored technique
settings can be easily recalled by simply pressing M1-M5.
SOURCE-IMAGE DISTANCE:
Use the tape measure on the side of the HF120/60H to confirm that the x-ray
unit is positioned at the correct source-image distance (SID) for the view
being taken.
ADJUSTMENT OF RADIATION FIELD :
Pressing the collimator switch will illuminate the field for approx. 30 sec.
Adjust light field to position of radiograph by two knobs for adjustment of
opening. During this time, use the adjustment knobs to size the radiograph.

6
RADIOGRAPHY :
All safety checks, press only first stage of EXPOSURE SWITCH.
STANDBY indicator goes on after 3 sec. Then, unit is ready for exposure.
Press and hold the second stage of EXPOSURE SWITCH. X-RAY indicator
illuminates, the buzzer sounds, and x-ray is generated for the time set. The
EXPOSURE SWITCH is a DEADMAN style. If the button is released during
exposure, exposure is stopped and error lamp will be blinking.
Press and hold the button until exposure is complete.
NOTE: The first stage of EXPOSURE SWITCH is pre-heat of filament.
DON’T KEEP ONLY THE FIRST STAGE OF EXPOSURE SWITCH “ON” LONGER
THAN 30 SEC.
If the exposure switch is released during exposure, error light will be blinking.
POWER OFF : When the POWER SWITCH is pressed, all indicators on the control panel
are off.
ERROR LAMP : HF120/60H has 2 kinds of error indications. If either of them is lit, x-ray cannot
be generated. Each detail is as follows.
ERROR LAMP DETAILS COUNTERMEASURE
Blinking
Exposure switch was released
during the X-ray exposure.
Turn off the unit then turn on
the unit to reset.
On Unit malfunction.
Stop procedure and follow
steps below.
※ If ERROR indicator is lit even when EXPOSURE SWITCH BUTTON is released, it means an
unusual situation has occurred. Turn off POWER SWITCH, wait 3 minutes, then start procedures
over again. If the error indicator remains lit, refer to P32 of this manual for additional troubleshooting
steps.

7
5.0 Main parts
Shutter adjust knob
Collimator light switch
Collimator
Tape measure
Shutter adjust knob
Angleindicator
Battery compartment
Connector for mA output
Connector for power cord
Connector for exposure switch
Fuse holder
Powerswitch
Exposure switch and cord
Powercord

8
X-ray Indicator Ready Indicator Error Indicator
kVIndicator ※mAs Indicator (mAs is ON)
※sec Indicator (sec is ON)
※mAs/sec Display change
Press the shift (#) button then press the
down arrow (▽) below the kV display
※Memory write
Press the Memory Storage button (MR)
then press memory Recall button (M1)
※ Low line voltage indicator illuminates
when line voltage is less than 90V
during the X-ray exposure.
Memory Storage uses two (2) size AA alkaline batteries inside the Battery Compartment, located on
the back side of equipment. Open the Battery Compartment using a coin, turning the compartment
lid counterclockwise 90°. If there are no batteries in the Battery Compartment, use some adhesive
tape to help you remove the compartment lid.
Insert two (2) size AA alkaline batteries in the Battery Compartment, with the + end toward the
Battery Compartment lid. Reattach the Battery Compartment lid and lock it with a coin, turning it
clockwise 90°.
Close open

9
6.0 Pre-Adjustment
6-1. M9171A PC Board adjustment
※Each PC Board delivered from the factory has already been adjusted.
DC370V
OCP
VR2
VR1
OVP
VR3
This adjustment has to be done after connecting all connectors completely.
Actual x-ray exposure is not necessary.
1. Adjustment of VR3 (DC370V)
Adjust voltage between 370 (+) and GND (–) to be 368.5 – 372 V by turning VR3.
Turning clockwise increases voltage.
2. Adjustment of VR2 (Over Current Protection circuit)
Adjust voltage between OCP(+) and GND (–) to be 2.29 – 2.31 V by turning VR2.
Turning clockwise increases voltage.
3. Adjustment of VR1 (Over Voltage Protection circuit)
Adjust voltage between OVP (+) and GND (–) to be 1.49 – 1.51 V by turning VR1.
Turning clockwise decreases voltage.

10
6-2. M9152D PC Board adjustment
※Each PC Board delivered from the factory has already been adjusted.
VR1
FQ1
VR3
FQ2
VR2
VR4
VR7
VR6
VR5
This adjustment has to be done after connecting all connectors completely.
Actual x-ray exposure is not necessary.
1. Adjustment of FQ1
Adjust frequency between FQ1 (+) and GND (–) to be 80 kHz by turning VR1.
Turning clockwise increases frequency.
2. Confirmation of FQ2
Confirm if frequency between FQ2 (+) and GND (–) is 90 kHz by turning VR2.
Turning clockwise increases frequency.
3. Set VR3 (EP SET) to the center position.
4. Set VR4 (IP SET) to the center position.
5. Adjustment of VR5 (pre-heat adjustment under 50kV). Turning clockwise increases voltage.
Adjust voltage between PRE(+) and GND (–) to be 0.629 V by turning VR5
6. Adjustment of VR6( pre-heat adjustment 52 to 80kV) . Turning clockwise increases voltage.
Adjust voltage between PRE(+) and GND (–) to be 0.569 V by turning VR6
6. Adjustment of VR7 (pre-heat adjustment over 82kV). Turning clockwise increases voltage.
Adjust voltage between PRE(+) and GND (–) to be 0.541 V by turning VR7

11
6-3. M2302B PC Board adjustment
※Each PC Board delivered from the factory has already been adjusted.
VR1
This adjustment has to be done after connecting all connectors completely.
Actual x-ray exposure is not necessary.
1. Adjustment of Low line voltage indicator.
1-1. Remove the J3 connector on the M9152D PC board.
1-2. Adjust the input voltage to 100VAC.
1-3. Set the power switch to the ON position.
1-4. Keep pushing exposure switch, and make a adjustment by “VR1” to make Low line voltage
indicator is “ON” when the input voltage is lower than 100VAC.
Turning clockwise Turn ON the Low line voltage indicator.

12
6-4. DC12V power supplys
※Each PC Board delivered from the factory has already been adjusted.
ZWS30-12
Output Voltage
DC12V
HP150S-280-12
Output Voltage DC12V

13
7.0 Re-Adjustment of kV
This adjustment has to be done after connecting all connectors completely.
Actual x-ray exposure is necessary.
This adjustment requires that an exposure be made.
Please observe all radiation related safety precautions.
Confirmation is surely necessary after the re-adjustment of kV.
Direct kV test is necessary using kV test instrument such as the VICTOREEN
NERO.
※This adjustment should be done whenever Insert Box or Inverter PC Board (M9171A PCB) is
replaced.
Oscilloscope (with storage mode) : Connect CH1 probe to EP, CH2 probe to IP, and GND to GND
terminal on M9152D PC Board. (refer page 10)
Setting of oscilloscope: CH1 ; 500m V/div, CH2 ; 500m V/div, 10 msec/div
Setting of x-ray output : 0.2 sec., 80 kV
Place of adjustment : VR3 on M9152D PC Board (EP SET)
Method of adjustment : Measure x-ray tube voltage by oscilloscope and adjust average
of peak values of EP waveform to be 1.9 V by VR3.
After the adjustment is finished, set x-ray output to be 120kV
and adjust again so that average of peak values of EP
waveform to be 2.9 V.
When x-ray tube voltage is measured by non - invasive direct x-ray
measuring equipment such as NERO, approx. 3 kV of deviation is included.
Therefore, adjust kV to be 97.5 ～99 kV at 100 kV station.
It is necessary to measure the actual kV with a direct x-ray measuring
Equipment such as NERO for the confirmation after this adjustment.

14
7-1. Adjustment of 80 kV by VR3
Adjust the ch1 (EP) by VR3 to be 1.9 V ±0.05 V.
Turning clockwise increases kV.
7-2. Adjustment of 120 kV by VR3
Adjust the ch1 (EP) by VR3 to be 2.9 V ±0.1 V.
Turning clockwise increases kV.

15
8. 0 Re-Adjustment of mA
This adjustment has to be done after connecting all connectors completely.
Actual x-ray exposure is necessary.
This adjustment requires that an exposure be made.
Please observe all radiation related safety precautions.
※This adjustment should be done whenever Insert Box or Inverter PC Board (M9171A PCB) is
replaced.
Oscilloscope (with storage mode) : Connect CH1 probe to EP, CH2 probe to IP, and GND to GND
terminal on M9152D PC Board. (refer page 10)
Setting of oscilloscope : CH1 ; 500m V/div, CH2 ; 500m V/div, 10 msec/div
Setting of x-ray output : 0.2 sec., 60 kV
Place of adjustment : VR4 on M9152D PC Board (IP SET)
VR4 : adjustment of mA at 60kV.
(mA is increase by turning clockwise.)
8-1.Adjust average of peak values of IP waveform to be 2.5 V by VR4.

16
8-2. Adjustment of 60mA at 40kV by VR4
Adjust the ch2 (IP) by VR4 to be 2.9 V ±0.3 V. Turning clockwise increases mA.
8-3. Adjustment of 20mA at 120kV by VR4
Adjust the ch2 (IP) by VR4 to be 0.95 V ±0.1V. Turning clockwise increases mA.

17
9. 0 Re-Adjustment of Pre-heat value
This adjustment has to be done after connecting all connectors completely.
Actual x-ray exposure is necessary.
This adjustment requires that an exposure be made.
Please observe all radiation related safety precautions.
※This adjustment should be done whenever Insert Box or Inverter PC Board (M9171A PCB) is
replaced.
Oscilloscope (with storage mode) : Connect CH1 probe to EP, CH2 probe to IP, and GND to GND
terminal on M9152D PC Board. (refer page 10)
Setting of oscilloscope : CH1 ; 500m V/div, CH2 ; 500m V/div, 10 msec/div
Setting of x-ray output : 0.2 sec., 70 kV
Place of adjustment : VR4 (IP SET)
VR5 (L Pre-heat voltage) ･40 to 50kV
VR6 (M Pre-heat voltage) ･52 to 80kV
VR7 (S Pre-heat voltage) ･82 to 120kV
9-1.Adjust peak values of IP waveform to be 3.0 V at 40kV by VR5.
1. Pre-heat value is low. Make Pre-heat value increase by turning VR5 clockwise.

18
2. Pre-heat value is high. Make Pre-heat value decrease by turning VR5 clockwise.
2. Pre-heat value is appropriate.