Summary of Contents for Sunlight Electronics Laboratory 7116C
- Page 1 MODEL – 7116C OPERATION MANUAL Mar. 26 , 2008 Tel :+886 2 2222 3759 Sunlight Electronics Laboratory Fax : +886 2 2223 0727 490, Sec. 2, Chung Shan Rd., Chung Ho, Taipei, Taiwan 23557 http://www.sunlilab.com.tw...
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Page 2: Table Of Contents
A. MODEL - 7116C AUDIO SWEEPER Ⅰ . PANEL INTRODUCTION ---------------------------------------------------------------------------------- (2) Ⅱ . 7116C CAN BE USED IN THREE WAYS --------------------------------------------------------- (3) Ⅲ . MEASURING THE LOWEST RESONANT FREQ. Fo OF A SPEAKER ----------------- (4) Ⅳ . SPECIFICATIONS -------------------------------------------------------------------------------------------- (5) B. -
Page 3: Ⅰ . Panel Introduction
7116C provides pure sine wave with very low total harmonic distortion. (approx. 0.1% THD ). The total harmonic distortion of 7116C consists of 2nd Harmonic component only and nearly without higher order harmonic components. So, 7116C is very suitable to test the sound quality ( spurious noise inspection ) of all kinds of loudspeaker, headphone, receivers, piezo, speakers system …... - Page 4 Ⅱ . 7116C Can Be Used In Following Three Ways 1. Automatic Sweep Generator : Depress Auto / Manu (8) pushbutton, Then 7116C will sweep forth and back between the frequencies set by start adjustment knobs and stop knob. 2. Manual Sweep Generator : Depress start (3) or stop (4) pushbutton, adjust Start / Stop coarse knob.
- Page 5 And the lowest resonant frequency of a woofer would affect the regeneration of low frequency greatly. Therefore, It’s necessary to measure the Fo value of each kinds of loudspeaker. And 7116C can measure the Fo value manually.
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Page 6: Ⅳ . Specifications
Max. 7116C ( 60W ) 100VA Max. 7116C ( 100W ) 160VA Max. 11. Min. Loading impedance : must be > 3.2Ω 12. Dimension: 37 ( L ) × 28 ( W ) × 13 ( H ) Cm. 13. Weight: 7116C ( 20W ) 6.0 KGS. -
Page 7: Ⅰ . Power Portion
Liquid Crystal Displays ( LCD ), and no single function occurred, then, users are required to check the fuse at the rear panel of 7116C, if fuse was burnt out, replace a new fuse with the same spec., if fuse is O.K., users may undergo... -
Page 8: Ⅱ . Output Signal Voltage Portion
The PCB nearest to the front panel is 〝 716SW 〞 PCB, which is the oscillator circuit and control center of 7116C, 〝 716SW 〞 PCB has several points ( points for testing and to judge whether PCB is faulty. ) “... - Page 9 ), since usually, when the 〝 PAAS 〞 PCB is faulted, the power transistors are faulted also. But to send back the whole set of 7116C or the 〝 716SW 〞 PCB for repair, users need not have to disconnect the say power transistors.
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Page 10: Ⅳ . How To Judge Whether The 〝 Paas 〞 Pcb Is Faulty
〝 〞 marks are AC 1V normal ( follow the afore-mentioned 716SW K procedures ), thereby judging which PCB of 7116C is faulty. Inner Top View Of 7116C R3 R4 7812 7912 RELAY TRANSFORMER PAAS.P.C.B. RELAY COMPONENT SIDE 716SW.P.C.B. - Page 11 Tel : +886 2 2222 3759 Sunlight Electronics Laboratory Fax : +886 2 2223 0727 490, Sec. 2, Chung Shan Rd., Chung Ho, Taipei, Taiwan 23557 http://www.sunlilab.com.tw - 10 -...
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