1. IF INSTR CHECK LED I remains on and no test pattern can be obtained, the following
assemblies should be checked in the order shown.
Main Control
Interface
Data Manipulator
Memory
Intensity Control
Analog-Digital Converter
XYZ Driver Amplifier or
Z-Axis Amplifier
X Deflection Amplifier
Y Deflection Amplifier
Al5 Controller
2. If INSTR CHECK LED I remains on but the test pattern is correct, check the following
assemblies in the order shown.
Interface
Memory
Main Control
Al5 Controller
3. If INSTR CHECK LED I is off but the test pattern is incorrect, first check the
Line
Generator and
Intensity Control before checking the entire Digital Storage Processor.
4. If INSTR CHECK LED I is off and the test pattern is correct, but the CRT and characters
come up incorrectly after a normal Instrument Preset, check the System ROMs first. A
“long POP” check of the Al5 Controller in the RF Section should also be performed.
CRT Display Test Programs
Note
I
For all tests, unless otherwise specified: Test Point
must be
to
This turns on the Test ROMs. After all jumpers for a
test are connected, momentarily push switch
to initialize.
The left INSTRUMENT CHECK LED should
remain
on
when the test ROMS
are enabled and instrument preset is pushed.
Test Pattern
Generates a test pattern with graticule, a diagonal line, characters, and three vertical lines
representing the ADC converter outputs of the negative peak, sample, and positive peak
detectors.
The IOB Interface circuitry and the System ROM are not used in generating the Test Pattern.
Free Run Check
removed
grounded
disables feedback from the program ROM to the Branch
Length Adder.
disables qualifier feedback.
A3 3
Содержание 85662A
Страница 13: ......
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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 51: ...3 AlA XYZ Driver Amplifier Component Locations 85662 60236 ...
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Страница 92: ...V I E W A AlA lII1 0 O0 4 JII fi V I E W B Figure 1 IF Display Section internal Fuse Replacement 8 Al A6 Al A7 ...
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Страница 111: ...I 1 AlA f15 V Regulator Component Locations 85662 60232 85662 60250 ...
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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 ...
Страница 125: ...c 4 C 6 R 6 I 0 C R 9 0 CR10 AlA Rectifier Component Locations 85662 60234 ...
Страница 126: ...0 El E2 r r L J L J _ I 0 0 0 0 AlA Bus Transition Component Locations 85662 60056 ...
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Страница 179: ... R51 Y S H BAL R50 X S H BAL R12 LL THRESH A3A2 Intensity Control Component Locations 85662 60025 85662 60245 ...
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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 275: ...R2 LG OS p 10 C6 I I R14 ar OS 1 5 1 A4Al Video Processor Component Locations 85662 60122 ...
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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 ...
Страница 295: ...2 4 5 1 0 N a R79 ZERO 4 E N TV R14 LG 20 A4A2 Log Amplifier Detector Component Locations 85662 60166 ...
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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 321: ... 15v t15v cl7 ETC Figure 2 A4A4 Input Buffer Amplifier Current Sinks 2 A4A4 ...
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Страница 336: ...c 4 3 L C D I P c41 L C D I P A4A4 Bandwidth Filter Component Locations 85662 60189 TR ...
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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 582: ...This page intentionally left blank 32 General Parts Listing ...
Страница 594: ...HEWLETT PACKARD HP Part No 85662 90085 Printed in USA ...