Unitek UNIBOND 2, User Manual

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8.04.02. S e t Pulse Amplitude t o 1 . 0 0 . T h e Improper S e t t i n g I n d i c a t o r should
8.04.03. Change Pulse D u r a t i o n t o 4 0 . T h e Improper S e t t i n g I n d i c a t o r should
ON. C h a n g e Pulse Duration t o 39 and t h e I n d i c a t o r should b e extinguished.
8.04.04. Change Pulse Amplitude t o 1 . 9 9 v o l t s . I n d i c a t o r should remain OFF.
Pulse Amplitude s e t a t 2 . 0 0 v o l t s , I n d i c a t o r should b e ON.
l i g h t .
remain
With
8.04.05. Wi t h Pulse D u r a t i o n a t 20 ms, I n d i c a t o r should s t i l l be ON, b u t i t should
extinguish a t a s e t t i n g o f 19 ms.
8.04.06. T h e Unibond should n o t b e a b l e t o be t r i g g e r e d when t h e Improper S e t t i n g
Indicator i s ON.
8.04.07. I t t h e Unibond f a i l s any o f these t e s t s , check U8.
8.05. C H E C K HIGH VOLTAGE SUPPLY
8.05.01. W i t h a n accurate meter, c o n f i r m t h a t t h e v o l t a g e o n t h e c o l l e c t o r o f Q16 i s
between 168 and 1 7 2 v o l t s when t h e Pulse Amplitude Switch i s s e t a t 3 . 9 9 v o l t s .
8.06. C H E C K OUTPUT STAGE BIAS
8.06.01. Tu r n power OFF. D i s c o n n e c t t h e Output Transformer.
8.06.02. S e t t h e Pulse Amplitude Switch t o 0 . 1 0 v o l t s . Remove t h e jumper which was
Placed across R103 i n 8 . 0 2 . 0 4 . T u r n power On. T h e v o l t a g e across R103 should b e
between 0 . 1 9 and 0 . 2 0 v o l t s . A d j u s t R102, i f necessary. CAUTION: DO NOT ALLOW THE
OUTPUT STAGE BIAS TO EXCEED 0 . 3 0 VOLTS. T u r n power OFF.
8.07. C H E C K THE OUTPUT PULSE
8.07.01. Tu r n power OFF. Remove t h e jumper from CR33. S e e 8 . 0 2 . 0 4 .
8 . 0 7 . 0 2 . Reconnect t h e Unibond Output Transformer.
8.07.03. Connect t h e 1 2 i n c h p i e c e o f 2 0 gauge copper w i r e across t h e o u t p u t ter—
minals o f t h e Unibond Output Transformer. S e t t h e Pulse Amplitude Switch t o 0 . 9 9
v o l t s . S e t t h e Pulse D u r a t i o n t o 1 9 . Connect t h e scope across t h e Feedback Leads.
8 . 0 7 . 0 4 . Tu r n power ON and s e t t h e scope t o t r i g g e r o n and d i s p l a y a 1 v o l t , 1 9 ms
pulse. F i r e t h e Unibond and confirm t h a t i t i s producing a 19 ms p u l s e , approximate—
l y 1 v o l t i n amplitude. A s h o r t "beep" should be heard f o l l o w i n g each p u l s e .
8.07.05 I T 1 3 OUR EXPERIENCE THAT A SCOPE DOES NOT o r m i t A PRACTICAL METHOD TO MUM
THESE MEASUREMENTS. UNLESS THE FOLLOWING TEST DETERMINES THAT A GROSS ERROR EXISTS •
DO NOT CHANGE TRIMPOT R871
8 . 0 7 . 0 6 . F i r e t h e Unibond s e v e r a l t i m e s , n o t i n g t h e reading on t h e scope d u r i n g each
pulse. A d j u s t t r i m p o t R87 f o r 0 . 9 6 t o 1 . 0 2 v o l t s .