Tektronix WFM 300A

   

CLAMP

LOW PASS

FILTER

S

OMPOSITE

CH1

CH2

CH3

CLAMP

PULSE

DC REST

OFF

AC CPL’D DC REST

CH 2 & 3

POS

CH 2 & 3

POS

BUFFER

LED

DRIVER

BUFFER

I/O

I/O

m PROCESSOR

CLOCK

CH 1

CH 2

CH 3

CH 1

CH 2

CH 3

COLOR

DIFF

TO GBR

TRANS-

CODER

64

I/O

187.5

kHz

CH 1

CH 2

CH 3

/V GREEN

SELECT

/V BLUE

SELECT

/V RED

SELECT

FRONT

PANEL

REMOTE

EXT

REF

RAMP SEL, RATE 1, H MAG 1 SEL, H MAG 2 SEL, H MAG 3 SEL, 187.5 kHz, & SYNC BLKEN

CLAMPED

AMPLIFIERS

FIELD REC &

TIMING LOGIC

GAMUT LIMIT

COMPOSITE

OUTPUT

CALIBRATOR

V GAIN

V CAL

EXT

SELECT

INT

COMPOSITE

SELECT

H RED

SELECT

H BLUE

SELECT

SYNC

BLKEN

CLAMP

PULSE

CLAMP

PULSE

B

G

R

+ GAMUT LED

– GAMUT LED

PIX MON

OUTPUTS

+

–

LINE

STEP

RAMP GEN,

HORIZ POS

& MAG AMPL

H CAL

GRATADD1 1 THRU –7, BLANK 187.5 kHZ

H GAIN

H SYNC, FIELD

CAL

TIME NO

INPUT

Y INVERT

INTENS

SCALES

HI VOLTS

GRATICULE

LIGHTS

GRAT LIGHT

SELECT

VDAC

HVAC

Z–AXIS

CONTROL

HORIZ

VECTOR

GEN

VERT

VECTOR

GEN

COLOR

SHUTTER

DRIVER

GRAT SEL 2.93 kHZ

COLOR

SHUTTER

TRACE

ROTATION

FOCUS

GRID DRIVE

V

H

INTENS

ADDRESS

BUS

/COMPOSITE

SELECT

CLAMP

PULSE

CLAMP

PULSE

LTNG

SELECT

V DIFF

SELECT

DIFF STEP

X5

BOWTIE

V FLAT

SELECT V LOW

SELECT

V LOW

SELECT

FIELD

GATE

CLAMP AND

LOWPASS FILTER

TRANSITION

INTENSIFIER

ELECT

GRAT

GEN

S

SYNC STRIPPER

Contents

Main Page Page Page Contacting Tektronix Page Page Page Page Page Page Page Page Page General Safety Summary To Avoid Fire or Personal Injury Symbols and Terms Page Page Page Page Page Page Page Page Page Page 111 Table 115: Certifications and compliances 112 Table 115: Certifications and compliances (cont.) Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Service Safety Summary Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Section 8 Replaceable Electrical Parts Parts Ordering Information Using the Replaceable Electrical Parts List Cross IndexMfr. Code Number to Manufacturer Abbreviations List of Assemblies Column Descriptions 83 Cross Index Mfr. Code Number To Manufacturer Code. 84 WFM 300A Code. 85 Code. 86 WFM 300A Replaceable Electrical Parts Part Number Serial / Assembly Number Number Tektronix Effective Discontinued Name & Description Mfr. Code Mfr. Part 87 88 WFM 300A 89 810 WFM 300A 811 812 WFM 300A 813 814 WFM 300A 815 816 WFM 300A 817 818 WFM 300A 819 820 WFM 300A 821 822 WFM 300A 823 824 WFM 300A 825 826 WFM 300A 827 828 WFM 300A 829 830 WFM 300A 831 832 WFM 300A 833 834 WFM 300A 835 836 WFM 300A Section 9 Diagrams/Circuit Board Illustrations Symbols Component Values Assembly Numbers Grid Coordinates S B GAMUT LIMIT REMOTE A3 MAIN BOARD Component Locator * See Parts List for serial number ranges. A3 Main Board REAR VER TICAL INPUT <1> REAR WFM 300A COMPONENT/COMPOSITE WAVEFORM MONITOR Schematic Diagram <2> Component Locator Chart Assembly A3 and A3A1. Partial Assembly A3 also shown on diagrams 1, 3, 4 and 5. A3A1 Static Sensitive Devices COMPONENT T O GBR TRANSCODER VER TICAL GAIN <2> $&!$ &$ %!$!$ Schematic Diagram <3> Component Locator Chart The schematic diagram has an alphanumeric grid to assist in locating parts within that diagram. Assembly A3. Partial Assembly A3 also shown on diagrams 1, 2, 4, and 5. TIMES 5 VERTICAL !#% # OUTPUT VERTICAL Schematic Diagram <4> Component Locator Chart LOW PASS FILTER HORIZONTAL <4> <2> <5> <3> <5> Schematic Diagram <5> Component Locator Chart A2 A2 Front Panel Board Static Sensitive Devices DOWN CONTROL CIRCUIT & FRONT PANEL <5> 1 LINE A2 FRONT PANEL BOARD X52 FIELD MAG2 LINE A5 GBR Board WFM300A Schematic Diagram <6> Component Locator Chart The schematic diagram has an alphanumeric grid to assist in locating parts within that diagram. Assembly A5. GBR & COMPOSITE OUT <6> # # A4 Control Board Component Locator A4 Control Board * See parts list for serial number ranges. (with cross-references to schematic diagrams 7, 8, 9, and 10) WFM 300A COMPONENT/COMPOSITE WAVEFORM MONIT OR %# # A4 Control Board Board lookup table on previous page. 671-1357-00 03 WFM300A Schematic Diagram <8> Component Locator Chart WFM 300A COMPONENT/COMPOSITE WAVEFORM MONITOR TIMING <8> Schematic Diagram <9> Component Locator Chart Assembly A4. Partial Assembly A4 also shown on diagrams 7, 8, and 10. * See parts list for serial number ranges. GRATICULE <9> Schematic Diagram <10> Component Locator Chart Assembly A4. Partial Assembly A4 also shown on diagrams 7, 8, and 9. <6> GAMUT & REMOTE <10> A1 Power Supply Board Use the circuit board table below for schematic <11>. (with cross-references to schematic diagrams 11 and 12) +*%$ ""(+*(/*%* WFM 300A COMPONENT/COMPOSITE WAVEFORM MONITOR LOW VOLTS POWER SUPPLY <11> Schematic Diagram <12> Component Locator Chart The schematic diagram has an alphanumeric grid to assist in locating parts within that diagram. Assembly A1. Partial Assembly A1 also shown on diagram 11. ( HV OSC & ERROR AMP "$&!"!)$%'""+ '($&"& $!) ($&"& Page Section 10 Replaceable Mechanical Parts Parts Ordering Information Using the Replaceable Mechanical Parts List Cross IndexMfr. Code Number to Manufacturer Abbreviations Chassis Parts Column Descriptions 103 Cross Index Mfr. Code Number To Manufacturer Code Manufacturer Address City, State, Zip Code 104 WFM 300A Replaceable Mechanical Parts Part No. Serial Number Fig. & Index No. Tektronix Code Mfr. Part No. 105 Fig. & Index No. Mfr. Part No. Qty Serial Number Effective Dscont Part No. Page WFM 300A A4 A1 A2 A3A1 A3A2