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Maintenance—Type 422 AC-DC
fro n t o f this manual). Be sure to replace only w ith a direct
replacement Tektronix transformer.
When removing the transformer, tag the leads w ith the
corresponding terminal numbers to aid in connecting the
new transformer. A fte r the transformer is replaced check
the performance o f the complete instrument using the Per
formance Check procedure.
High-Voltage Compartment.
The components located in
the high-voltage compartment can be reached fo r mainten
ance or replacement by using the following procedure.
1. Remove the cabinet from the instrument as described
earlier in this section.
2. Turn the instrument over w ith the bottom side up.
3. Remove the tw o screws which hold the high-voltage
compartment to the chassis.
4. L ift the complete high-voltage compartment away
from the chassis.
5. Slide the shield o ff the plastic high-voltage housing.
The tw o pins on the bottom o f the housing must be freed
from the holes in the shield before the shield can be slid
off.
6. Remove the lid of the high-voltage housing.
7. To replace the high-voltage compartment, reverse the
order o f removal. When placing the circuit boards back into
the compartment, be sure the insulator sheet is installed in
the proper place. Fig. 4-6 shows the correct location o f the
circuit boards and the insulator sheet.
Fig. 4-6. Location of circuit boards in high-voltage compartment.
NOTE
A ll solder joints in the high-voltage compartment
should have smooth surfaces. A ny protrusions may
cause high-voltage arcing at high altitudes.
Recalibration After Repair
A fte r any electrical component has been replaced, the
calibration o f that particular circuit should be checked, as
well as the calibration of other closely related circuits.
Since the low-voltage supply affects all circuits, calibration
o f the entire instrument should be checked if w ork has
been done in the low-voltage supply or if the power trans
form er has been replaced. The Performance Check proce
dure provides a quick and convenient means o f checking
instrument operation.
4-13
Содержание 422
Страница 4: ...R TV 422 AC OC P o p p Type 422 AC DC ...
Страница 40: ...Fig 3 1 Basic block diagram of Type 422 with AC DC Power Supply W I 1SJ a Circuit Description Type 422 AC DC ...
Страница 64: ...Circuit Description Type 422 AC DC 3 26 Fig 3 15 Idealized DC DC Regulator circuit waveforms ...
Страница 68: ...NOTES ...
Страница 75: ...I 1 Fig 4 4 Troubleshooting chart for Type 422 with AC DC Power Supply Maintenance Type 422 AC DC ...
Страница 90: ...Maintenance Type 422 AC DC 4 22 Si Fig 4 14 High Voltage Rectifier Multiplier circuit board ...
Страница 92: ...Maintenance Type 422 AC DC 4 24 Fig 4 16 DC Power Converter circuit board ...
Страница 93: ...Maintenance Type 422 AC DC E 4 25 Fig 4 17 DC Power Control circuit board ...
Страница 94: ...NOTES ...
Страница 132: ...NOTES ...
Страница 158: ......
Страница 180: ...B U D C K D A G A N s N e o o o o u p T Y P E 4 Z 2 A C D C 0 2 foe ...
Страница 186: ...zv div 0 V E R T I C A L S W I T C H I N G O U T P U T A M P L I F I E R s N e q o o o up T Y P t 2 a AC DG ...
Страница 187: ...T Y P E 4 1 2 A C D C l S W E E P T R I G G E R 3 s M 2 0 0 0 0 U P 1268 SWEEP TRIGGER ...
Страница 191: ... H O R I Z O N T A L A M P L I F s N z o o o o u p H O R I Z O N T A L AMPLIFIER ...
Страница 192: ... ...
Страница 193: ...II CAL R EG 0670 C A L I B R A T O R R E G U L A T O R S S N Z fOOO U P T Y P t 4 2 2 AC D C a CALIBRATOR REGULATOR ...
Страница 194: ... 0 6 7 0 C A L I B R A T O R R E G U L A T O R S J S N 20 000 ll 9 9 9 TYPfe 2 AC DC CALIBRATOR REGULATOR ...
Страница 195: ...CRT CIRCUIT 10 3 f 8 OS M hS q u a gs u 0 z 3 U js o 0 1 j C V J C J u l Q ...
Страница 196: ... J T Y P t 4 Z 2 A C D C 0 A C D C P O W t R Ed L CTO R 11 s N e o o o o u p v AC DC POWER SELECTOR ...
Страница 198: ...FIG 1 FRONT TYPE 422 AC DC ...
Страница 199: ...FIG 2 CHASSIS ...
Страница 200: ...4 I TYPE 422 AC DC FIG 2 ...
Страница 201: ...FIG 3 AC DC POWER SUPPLY s TYPE 422 AC DC FIG 3 ...
Страница 205: ......