[理工] 電子電路
Determine the most likely failure in the circuit board of the following figure
for each of the following symptoms.
State the corrective action you would take in each case.
The transformer has a turns ratio of 1.
(a) No voltage across the primary
(b) No voltage at point 2 with respect to ground; 120 V across the primary
(c) No voltage at point 3 with respect to ground; 120 V across the primary
<d) A pulsating full-wave rectified voltage with a peak of 170 V at point 4
with respect to ground
(e) Excessive 120 Hz ripple voltage at point 5 with respect to ground
(f) Ripple voltage has a frequency of 60 Hz at point 4 with respect to ground
(g) No voltage at point 6 with respect to ground.
附上題目圖片：http://i.imgur.com/HPwXk.jpg
謝謝~
--
╔《新版十二生肖》═════════════════════════════╗
║ ◣◣ ˍ ║
●●╰‧‧╯◣ ◢ [ ] ιι . .◣ - - ◣ ˍ▁ ◢﹎◣▁▂ ║
◢'' .. '〒' '. ' ' ' ξ ▌ . . ≡◢'◎@@ ●﹏●★' ◣ ˊ▄ˋ ★︰ ║
‵′/ ██╯ █/ ▲╭≡╮ ▃ ￣█ㄟ @@@@ ◣◢ ◥█◤ ˋ▄ˊ ‥ ║
╚═══" " ════════════ "═"══"═"══╯══════liszt1025╝
--
※ 發信站: 批踢踢實業坊(ptt.cc)
◆ From: 140.115.120.41
討論串 (同標題文章)
完整討論串 (本文為第 2 之 3 篇)：
理工
3
8