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Buyer returns the defective product in the original, or equivalent, shipping container; • if, upon examination of such product by Sorensen it is disclosed that, in fact, a defect in materials and/or workmanship does exist, that the defect in the product was not caused by improper conditions, misuse, or negligence;...
--------------- SECTION 1 THEORY OF OPERATION ..........................INTRODUCTION This section provides a basic discussion of unit operating principles, which may be used in conjunction with the troubleshooting chart provided in Section 3, to enable the logical and rapid isolation of unit faults. A brief description of the phase control principle is given first, followed by a block diagram analysis of system functions.
..................BLOCK DIAGRAM ANALYSIS (FIGURE 1-2) The ac input voltage is first applied to CR? {l"riac), which is in series with power transformer T1 . CR? functions with the control circuits to form a feedback loop which prevents a change in output voltage when either the line or load changes.
ABSORBED INPUT VOLTAGE VOLTAGE PASSING STAGE l e__ ____ CONTROL Figure 1-3 Passing Stage Principle To illustrate circuit operation, assume an increase in the T2 (Figure 3-4) supply output. Pin 2 of U4 will become more negative, and the output at pin 6 more positive, tending to turn Q2 off.
Pin 3 of US is connected to plus sense. Front panel voltage controls R10/R11 function as variable feedback resistances from US pin 6 to pin 2. The negative 12.4 volt reference through R39/38/37 establishes the desired programming current range, so that Oto 10 volt signal is obtained at pin 6 of US.
The reset circuit consists of Q8 and R68. The full wave rectified ac input from T2 is impressed across O7/R48. 07 clamps the base of Q8 at its zener level, keeping it shut off (021 is forward biased). As the impressed voltage drops toward zero, the zener voltage follows.
1.4.7 ..........................POWER SECTION The input ac voltage is applied to the primary of power transformer T1 through an SCR, (CR7). The output is rectified by a full wave bridge, and filtered by a Pi network with a damping resistor (R3).
The input signal to U8 determines which lamp lights, as follows: Constant Current Mode (Current Limit) DS3 The input terminals of U8 are pins 2 and 3. Pin 2 is driven positive relative to pin 3 when the current amplifier (U7) output (pin 10) is in control (i.e., during current mode operation).
The troubleshooting data should be used in conjunction with the schematic diagrams and Section 1 which outlines the principles of operation. Any questions pertaining to repair should be directed to the nearest Sorensen representative or to the factory.
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Verify unit has gone from voltage mode to current mode by noting a significant drop in output voltage, by illumination of DS3. Set fine current adjustment to midpoint and apply short circuit. Using minimum current Adj. (R17 on PCB) adjust output current to exactly 0 amps.
Table 2-1 DCR-82 Troubleshooting No output (voltage mode) Wrong input voltage Open fuses and circuit breaker* Reference voltages (check levels) Defective U6 or U5 Collector to emitter short on QB, Q6, Q3, Q5 orQ4 Q9 open or shorted Fuse opens or circuit CR? shorted* Input capacitors shorted* breaker trips...
Figure 2-1 Performance Test Setup 2.5.1 ..................... Voltage Mode Regulation and Ripple To check voltage mode regulation and ripple, proceed as follows: Connect a sensitive digital voltmeter and an RMS ac voltmeter across unit output terminals per Figure 2-1. Select a current shunt per Table 2-2 with a DVM for current output readings.
Decrease ac input voltage to low line specification. Output voltage change should not exceed limits specified in Table 2-3. Close load switch and adjust load for rated current. Using high ac line specification and full load, verify ripple meets specification. 2.5.2 ....................
If it is essential to use the high potential test method, please contact the factory for information on special precautions that should be taken. CAUTION Sorensen Company cannot be held liable for any malfunctions resulting from the application of a high potential test (greater than 100V).
This is an alpha-numeric identification of the component as called out on the unit drawings. 3.1.2 Sorensen Part Number ..................The Sorensen part number should be used when ordering parts directly from: Sorensen Sales & Technical Support 9250 Brown Deer Road...
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DO NOT USE HARDWARE SUPPLIED WITH CAPACITORS. NOTES: UNLESS OTHERWISE SPECIFIED. ZONE/ REV f OESCRIPTIClN REVISIONS � INSTALL NUTS FINGER TIGHT. A I REL IO £' OD E_ 9 89A34D ASSEMBLE PER ELGAR WORKMANSHIP STANDARD SECURE CAPACITORS WITH TIEWRAPS WITHOUT DISTORTING DOCUMENT NO.
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A ORIGINATED IID,1SIONS .,...,. B REVISED ZONEJRfV OESCRIPTION DA TE l APPR0\£0 C REVISED D REVISED PER ECO 89A377 880512 106) SEE DETAIL "C" PIN 1 COMPONENT SIDE E REVISED PER ECO 92A 148 8901l07 F REVISED PER ECO 92A537 891116 G REVISED PER ECO 92A713 920420...
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R<\ISIONS NOTES: UNLESS OTHERWISE SPEC I F IED. Z<M/REV DESQIIPTION "' DATE "'T APPRO\-fD A REL TO MANUFAC. 8/6/B0 I 4 /J0/g1 I B REL PER ECO 91A ASSEMBLE PER ELGAR WORKMANSHIP STANDARD 9/21/•1 I DOCUMENT NO. 0050003-01. C REV PER ECO 91A169 &...
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DESCRIPTICW ZON£!R£VI """OHS NOTES: UNLESS OTHERWISE SPECIFIED. P I REV PlcR ECN N95O_37O ASSEMBLE PER ELGAR WORKMANSHIP STANOARD N I REDRAW FQFl C_l,ARl1Y & APPLY A THIN lAYER OF THERMAL GREASE, ITEM 39 DOCUMENT NO. 0050003-01. BEFORE INSTALLATION OF THE RECTIFIER. ITEM 18. R I REV PER ECN N95OJO9 USE ON -7 (.l00-1.5).
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A \ RE\'lSED PER EC089Al77 2. ALL RESISTORS IN OHMS AND 1/4W ±1% UNLESS OTHERWISE SPECIFIED. I 8811115 J. • THESE COMPONENTS ARE ADDED BY SORENSEN, DEPENDING·ON MODEL. B I R£\1SED- PER ECOOOAl52 I QQQ.101! 4. NUMBERS IN PARENTHESES ARE FOR THE LM317H, NUMBERS NOT IN C l �...
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Rf:VISIONS ZON£j REV} � : � = � : � � � DESCRIPTION f DAlE I APPff0\£0 A I REL ffR �O 9�93 AR I 5/17/oo B JREVISED I\R I e /+/Oo .-'--'-':C...,-.-� AR I 0/ 7 / 00 C I REV PER l;Q_ 9Q_A60A AR j B/ 2 +/00 D I REV PER �O 90A690_ _ D11 ND EO.
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REVISIONS DESCRIPTION DATE APPRO� A REDRAW FOR CLARl1Y UNLESS OTHERWISE SPECIFIED. NOTES: MS </4/95 8 REV PER _ECN N95O;l_7O MS L10L9 ALL DIMENSIONS ARE IN INCHES (mm). SLIDE-RAIL OPTION AVAILABLE. CASE I CONVECT10N COOUD �===;=== 1 9.J S (SO " ! : =================== ===- 1--- -_ -_ -_ -_ -_ -_-_ -_ -_ -_-_ -_ -_-_ -_,_ •...
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RE'.1SIONS ZONE REV! DEsaflPTION DAlt I APPR:0¥£0 I SEE SHEET 1 soow 1000W □ DCRB0-682 DCR150-J82 PCB CONTROL ASS'f OCR2Q-7fi82 0CR10-4082 I OCR20-25B2 I 0CR40-1382 I DCRB0-982 I OCRS0-682 I 0CR150-JB2 I DCRJ00-1.582 I .75B2 OCR10-4082 CR60-1882 OCR-t-0-1392 OCR60-9B2 DCRBOO DRAWING NUMBER 1063005 1064104-2...
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