6. The RECORDER pushbutton
LOWER LEFT and UPPER RIGHT cannot be
replaced as described in Step 5. To replace these
it is necessary to remove the
pushbutton keys and the
Keyboard.
a .
b.
C.
d.
e.
f.
Remove key housing the defective LED by prying the key outward using a pointed
instrument such as a soldering aid.
Remove sub-panel and
Keyboard by removing the screws from the perimeter
and pulling forward.
Unsolder the defective LED from the rear of the
Keyboard.
Loosen the leads from the printed circuit board using a soldering aid and push on the
leads to force LED out of switch through the front of the panel.
Insert new LED through the switch from the front of the panel so that leads extend
through the printed circuit board at the rear of the keyboard. Negative (cathode) lead
goes to square pad on printed circuit board.
Pull leads of LED with fingers or needle-nose pliers to ensure that LED is far enough
inside of the switch to allow the key to be reinstalled.
Solder LED leads to printed circuit board, trim excess lead length, and reassemble front
panel.
LED
L E A D I D E N T I F I C A T I O N
S U B P A N E L V I E W
Figure 2. Front Panel LED Replacement
3
Содержание 85662A
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Страница 17: ...can cause the CRT to be disabled If U14 is operating correctly visually inspect the A4A9 assembly Al 3 ...
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Страница 28: ...AlA KEYBOARD Al Front Panel Assembly and Component Locations ...
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Страница 124: ...DSl M A I N S I N D I C A T O R C6 CATHODE 4 1 El r l CR9 P I AlA Rectifier Component Locations 85662 60204 ...
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Страница 196: ...R 8 YSL L Il ln R IC7n XSL 0 0 0 R 5 I I Y G A I N R 2 Y E X P A3A3 Line Generator Component Locations 85662 60128 ...
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Страница 216: ...Verify binary count sequence starting at the least significant bit SO 500 ns square wave to S7 64 ps square wave 4 A3A6 ...
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Страница 258: ...R 5 7 T H G A I N R59 T H O F S A3A9 Track and Hold Component Locations 85662 60165 ...
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Страница 262: ...ASXAlPI I A3XA2P 1 AJXAJP 1 A3XA4P 1 A3XA5P 1 A3XA6Pl A3XA7P 1 A3XA9P 1 AJXAlP2 A3XA2P2 A3XASP2 A3XA6P2 A3XA7P2 ...
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Страница 294: ...2 k 4 5 7 J2 F1 TEN R91 12VTV R14 LG 20 A4A2 Log Amplifier Detector Component Locations 85662 60132 ...
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Страница 316: ...10 A 1 2V T Y P 7 V T Y P A4A3 Log Amplifier Filter Component Locations 85662 60009 ...
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Страница 365: ...A4A8A2 Down Converter Component Locations 85662 60005 ...
Страница 366: ...c31 R29 1 8 4 M H z NULL W I D E G A I N A4A6Al Up Converter Component Locations 85662 60006 ...
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Страница 379: ...c40 c 4 1 PK SYM y Hz A M P L 10 Hz AMPL A4A7 3 MHz Bandwidth Filter Component Locations 85662 60004 85662 60174 ...
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Страница 409: ...Table 4 Video Bandwidth Truth Table 6 A4A9 ...
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Страница 452: ...A4A6A2 Output Driver Component Locations 85662 60170 Option 067 Tab ...
Страница 453: ...A4A6Al Input Buffer Component Locations 85662 60171 Option 067 Tab ...
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Страница 473: ...Table 4 Video Bandwidth Truth Table Option H96 3 ...
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Страница 504: ...Table 4 Video Bandwidth Truth Table 100 Hz H 30 Hz H H 10 Hz H 3 Hz H 1 Hz 6 Option 462 ...
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Страница 594: ...HEWLETT PACKARD HP Part No 85662 90085 Printed in USA ...