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Kenwood PWR 18-1.8Q, Instruction Manual

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8. MAINTENANCE 

8-1 Removing the Case 

T o  r e m o v e  t h e  c a s e  o f  t h e  u n i t ,  r e m o v e  t h e  s c r e w s  o n  t h e  t o p 

a n d  s i d e s  o f  t h e  u n i t  a n d lift  t h e  c a s e  u p w a r d s . 

Fig.

 17 

8-2 Changing the Power Voltage 

T o  c h a n g e  t h e  r a t e d  i n p u t  v o l t a g e ,  c h a n g e  t h e  r a t e d  v a l u e s  o f 

t h e  p o w e r  t r a n s f o r m e r  a n d  f u s e  i n s i d e  t h e  u n i t  a s  d e s c r i b e d 

in  t h e  f o l l o w i n g  s e c t i o n : 

F i g .  1 8 

32 

Summary of Contents for PWR 18-1.8Q

Page 1: ...REGULATED DC POWER SUPPLY PWR18 1T PWR18 1 8Q INSTRUCTION MANUAL Part of Power Supply Function KENWOOD CORPORATION PRINTED IN I AN B63 0030 00 T 91 12 1110 9 8 7 0 5 4 3 2 1 90 12 1110 9 8 KENWOOD ...

Page 2: ...quipment generates uses and can radiate radio frequency energy and if not installed and used in accordance with the instructions may cause harmful interference to radio communications However there is no guarantee that interference will not occur in a particular installation If this equipment does cause harmful interference to radio or television reception which can be determined by turning the eq...

Page 3: ...o w e r supply units are the first in their class with built in microcomputers making their multi functional capabilities s e c o n d to none in the market Their dual tracking function is helping the series a c h i e v e the highest of reliability Moreover their multi output is earning t h e m a several fold lead over conventional single output p o w e r supply units making the P W R series m o s ...

Page 4: ...he desired output voltage and current v a l u e s c a n be s p e c i f i e d precisely in 1 0 m V a n d 1 0 m A unit K e y lock f u n c t i o n F o r c e s all the v a l u e s previously s e t to be f i x e d T h i s prevents the current values from being altered by s o m e o n e else w h i l e the user is o u t Protect f u n c t i o n P r e v e n t s u n e x p e c t e d voltage and current f r o ...

Page 5: ...ed voltage O U T P U T C U R R E N T Output current 0 to 1 8 A 0 to 1 8 A 0 to 2 A 0 to 1 A 0 to 1 A 0 to 1 A 0 to 5 A Setting resolution 1 0 m A M a x output current 1 8 A 1 8 A 2 O A 1 0 A 1 A 1 A 5 OA Dual tracking 0 to 1 8 A 0 to A T r a c k i n g deviation 2 4 0 m A of rated current 2 4 0 m A of rated current C O N S T A N T V O L T A G E C H A R A C T E R I S T I C S Input fluctuation for su...

Page 6: ...0 0 1 0 m A T y p i c a l 1 0 m A T y p i c a l 2 0 m A T y p i c a l Ripple noise r m s 1 0 H z to 1 M H z 2 m A r m s T y p i c a l 2 m A r m s T y p i c a l 5 m A r m s T y p i c a l Ripple peak p p 5 6 m A p p T y p i c a l 5 6 m A p p Typical 1 0 m A p p T y p i c a l T e m p e r a t u r e coefficient 3 0 0 p p m C T y p i c a l V O L T M E T E R Display 3 1 2 digit L E D m a x 1 9 9 9 V fixe...

Page 7: ...lights up w h e n O N M e m o r y S e v e r a l voltage and current p r e s e t s c a n be s t o r e d Red L E D lights w h e n O N K e y L o c k L o c k s all f u n c t i o n s a s s e t All controls e x c e p t P O W E R are disabled R e d L E D Delay O N O F F D E L A Y of 1 8 V and 8 V 6 V output G r e e n L E D lights up w h e n O N O N O F F D E L A Y of 1 8 V and 6 V output G r e e n L E D ...

Page 8: ...3 W approx 2 1 O V A 1 7 6 W INPUT V O L T A G E V o l t a g e F r e q u e n c y A C 1 0 0 V 1 0 1 2 0 V 2 2 0 V 2 4 0 V 1 0 m a x 2 5 0 V 5 0 6 0 H z Internal s w i t c h i n g possible D I M E N S I O N S A N D W E I G H T D i m e n s i o n s w i d t h 1 3 8 m m height 1 4 7 m m depth 3 7 2 m m M a x d i m e n s i o n s w i d t h 1 4 3 m m height 1 6 7 m m depth 3 9 2 m m W e i g h t approx 8 2 ...

Page 9: ... e positive a n d negative t e r m i n a l s or the positive a n d negative terminals w i t h e a c h other If a short is m a d e u s e the m a c h i n e after setting the output voltage to rather a l o w level If it is high the internal circuits m a y be d a m a g e d Keep it in m i n d T h i s is a floating t y p e p o w e r s u p p l y For normal u s e the provided shorting bar to c o n n e c t...

Page 10: ... i l e the m a c h i n e is in this s t a t e all control s w i t c h e s will be non functional If the s y s t e m is turned off while the data 0000 is displayed on the display panel the content of the backup m e m o r y m a y be d e s t r o y e d It m a y c a u s e a n error K e e p it in m i n d If the s y s t e m is turned off due to operational errors or s o m e other unavoidable errors for e...

Page 11: ...lay resolution However the output does not fluctuate If a r e v e r s e voltage is generated 0 0 0 V is displayed a n d the display f l a s h e s Ammeter T h i s indicates the output current value and the setting v a l u e of the positive and negative output current Rotary Encoder voltage current delay set knob T h i s is rotary e n c o d e r t y p e knob for setting the positive negative v o l t ...

Page 12: ...e A L E D lights w h e n this k e y is p r e s s e d and the current limit v a l u e t h a t is indi c a t e d on the voltmeter c a n be varied of s e t by the rotary e n c o d e r W h e n this k e y is p r e s s e d a g a i n the A L E D g o e s off and the current limit value cannot be varied by the rotary encoder D E L A Y Key D E L A Y L E D Green P r e s s this k e y to light the D E L A Y L ...

Page 13: ...I N G L E D Red T h i s k e y s e t s the output the positive and negative voltage and current v a l u e s to the s a m e value in the tracking m o d e T h e L E D lights to indicate that this m o d e is s e t W h e n this k e y is p r e s s e d the setting v a l u e s of the positive and negative output voltage and current limit are s e t to the s a m e absolute v a l u e a n d the T R A C K I N ...

Page 14: ... c o d e r to s e t the v a l u e s for the output voltage and electrical current limits If a n output overload o c c u r s at c o n s t a n t current operation the 6 V L E D will begin flashing V A R I A B L E K e y V A R I A B L E L E D Green Orange T h i s k e y is p r e s s e d to c h a n g e the output setting W h e n the key is pressed the L E D lights up to indicate that the machine is in a...

Page 15: ... d be fore the k e y w a s p r e s s e d the first time If the V A R I A B L E key is p r e s s e d w h i l e the M E M O R Y L E D is lit the V A R I A B L E L E D lights up for about 3 s e c o n d s the A D D R E S S NO used in the R E M O T E mode is displayed on the voltmeter and a m m e t e r d i s p l a y s For details s e e S e c t i o n s 6 of this m a n u a l O p e r a t i o n P r o c e d...

Page 16: ...PWR18 1 8Q P W R 1 8 1 T Fig 5 16 ...

Page 17: ...o 0 and lights up orange for a n y m a c h i n e a d d r e s s other t h a n 0 R E M O T E m o d e P r e s s this k e y to c h a n g e the m a c h i n e f r o m the R E M O T E m o d e to t h e L O C A L m o d e If this k e y is p r e s s e d w h e n t h e m a c h i n e is the R E M O T E m o d e the L E D g o e s off and the m a c h i n e s w i t c h e s to the L O C A L m o d e R e m e m b e r t...

Page 18: ...nt is input by this c o n n e c t o r A l w a y s u s e t h e a c c e s s o r y p o w e r cord for c o n n e c t i o n to this terminal Heat Sink T h i s is a radiator for the t r a n s i s t o r s B e careful not to t o u c h it a s it c a n be e x t r e m e l y hot from dissipating the heat from the c o m p o n e n t s 32 Remote Connector T h e c o n n e c t o r u s e d for input or output of re...

Page 19: ...the unit is p o w e r e d for the first time after p u r c h a s e or after it h a s not been u s e d for a long period of time 1 1 8 V L E D Lights up 2 V L E D Lights up 3 O U T P U T L E D T u r n off 4 V A R I A B L E L E D Lights up Green 5 O U T P U T P R O T E C T L E D Lights up 6 T h e initial settings of the voltmeter the a m m e t e r and the P R E S E T K E Y s 1 2 3 a r e Display sett...

Page 20: ... e m T h e s e t v a l u e in c r e a s e s if the knob is turned c l o c k w i s e T h e s e t v a l u e d e c r e a s e s if the knob is turned c o u n t e r c l o c k w i s e W h e n adjusting settings using the R o t a r y E n c o d e r the a m o u n t by w h i c h the target parameter c h a n g e s per incre m e n t of rotation will v a r y depending on h o w quickly the knob is rotated 1 W h...

Page 21: ...replaced w i t h a n e w one Call the local s e r v i c e representative if this o c c u r s 6 1 Using as a positive J stabilized power supply 11 S e t the L E D s a s s h o w n in the Figure 8 M a k e s u r e that the O U T P U T L E D is not lit 2 T u r n the R o t a r y E n c o d e r to s e t an arbitrary voltage v a l u e 3 P r e s s the A K E Y a n d m a k e s u r e that the A L E D lights up...

Page 22: ...Q T h e output is obtained f r o m the 6 V output terminal If the O U T P U T K E Y is p r e s s e d O N both positive and negative output terminals supply a voltage and a current If the load short circuits or if the s e t current limit v a l u e is r e a c h e d the circuit b e c o m e s overloaded and the out put voltage drops T h e unit m a y be u s e d a c o n s t a n t current p o w e r s o u...

Page 23: ... n is Figure 1 0 Be sure that the O U T P U T L E D is n o t f i t Figure 1 0 indicates the c a s e w h e r e positive voltage level is u s e d 2 T u r n the Rotary Encoder to s e t an arbitrary positive voltage v a l u e 3 P r e s s the A K E Y a n d m a k e s u r e that the A L E D lights up 41 T u r n the R o t a r y E n c o d e r to s e t a n arbitrary positive current v a l u e 51 Sf the 1 8 ...

Page 24: ... t he voltage and current for n e w voltage and current v a l u e s 6 4 PRESET feature 11 T h e P R E S E T feature is used to store the a c t u a l l y value setting displayed value in one of the P R E S E T 1 2 3 K E Y s 1 S e t the L E D s a s indicated in Figure 1 1 A l w a y s m a k e s u r e t h a t the O U T P U T L E D is not lit 2 S e t a positive voltage v a l u e by the R o t a r y E n ...

Page 25: ...D T h e D E L A Y Function T h i s function enables y o u to s e t intervals b e t w e e n the O N or O F F t i m e s of digital line a n d analog line output In the c a s e of m i x e d digital analog circuits turning the out puts O N and O F F s i m u l t a n e o u s l y could c a u s e s u d d e n d a m a g e to the c o n n e c t e d load T h e D E L A Y f u n c t i o n is designed to prevent t...

Page 26: ...ip will be the e x a c t r e v e r s e of that for positive D E L A Y t i m e s O U T P U T L E D will be flashing during the s e t delay time t If O U T P U T K e y is pressed during the delay time oper ation i e while O U T P U T L E D is f l a s h i n g both digital a n d a nalog line output will be turned O F F no matter w h a t O N O F F condition t h e y h a p p e n to be in T h e delay time...

Page 27: ... e g If one of the P R E S E T K E Y s is p r e s s e d by m i s t a k e w h i l e the Unit is u s e d in the V A R I A B L E s t a t u s the setting v a l u e stored in the p r e s s e d P R E S E T K E Y is output w h i c h m a y e r a s e the loaded d a t a accidentally T h e O U T P U T P R O T E C T feature is useful to prevent this t y p e of a c c i d e n t T h i s feature protects the load...

Page 28: ...e is started up Other w i s e the v a l u e of the incorrectly s e l e c t e d output setting k e y will be output 2 F o l l o w the b e l o w procedure to m a k e s u r e that the O U T P U T P R O T E C T feature is s e t O F F 1 P r e s s the O U T P U T K E Y a s s h o w n in Figure 1 1 to turn off its L E D 2 P r e s s the O U T P U T K E Y to turn O N the output 3 Nothing c a n be changed at...

Page 29: ... is t u r n e d off w i t h the K E Y L O C K m o d e a c t i v e the K E Y L O C K m o d e will be still effective after p o w e r is supplied to the product n e x t t i m e T h a t i s e v e r y k e y operation will be disabled in this c a s e K e e p it in mind If n e w k e y operations need to be performed s e t the K E Y L O C K s w i t c h to the O F F mode 6 8 Rotary Encoder lock procedures...

Page 30: ...ut 1 P W R 1 8 1 8 Q Serial Output Application U s a g e for serial output NOTE Do not attempt to connect two positive outputs 18 V and 8 V or two negative outputs 6 V and 1 8 V 31 U s a q e for c o m p l i m e n t a r y output ...

Page 31: ...o c o n n e c t the G N D line either to the C O M 2 or 6 V terminal 31 2 P W R 1 8 1 T Serial Output Application U s a g e for c o m p l i m e n t a r y output U s a g e for homopolar double output U s a g e for serial output ...

Page 32: ... on the top and sides of the unit and lift the c a s e u p w a r d s Fig 17 8 2 Changing the Power Voltage T o c h a n g e the rated input voltage c h a n g e the rated v a l u e s of the p o w e r t r a n s f o r m e r a n d f u s e inside the unit a s described in the following s e c t i o n Fig 18 32 ...

Page 33: ...n d s to the n e w p o w e r voltage s e e the table Be s u r e to d i s c o n n e c t the p o w e r cord f r o m the A C out let before replacing the p o w e r voltage or the f u s e T a b l e R a t e d f u s e s Model 1 0 0 V V 2 2 0 V 2 4 0 V P W R 1 8 1 T 2 5 A T L 2 5 A T L 1 5 A 1 5A P W R 1 8 1 8 Q 3 A T L 3 A T L 1 5A TL 1 6 A I T L T L T i m e lag f u s e Fig 2 0 33 Fig 19 ...

Page 34: ...voltage nor the output current d e c r e a s e s T h e p o w e r transistor is broken or the control circuit is m a l f u n c tioning U n s t a b l e output 11 Is there a n y c h a n g e in the p o w er v o l t a g e 2 C a n a n y oscillation be o b s e r v e d 3 Is a n y strong m a g n e t i c or elec tric field present near the unit 1 T h e p o w e r voltage e x c e e d s the limits of a rated i...

Page 35: ...10 EXTERNAL DIMENSIONS FIGURE Dimentions of the P W R 1 8 I T are identical Fig 21 Fig 22 35 ...

Page 36: ...36 Fig 23 Fig 2 4 Dimentions of the P W R 1 8 1 T are identical ...

Page 37: ...A product of KENWOOD CORPORATION 17 5 2 chome Shibuya Shibuya ku Tokyo 150 J a ...

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