Tektronix 2467B

2465B/2467B Service
FRONT-PANEL TROUBLESHOOTING
FRONT-PANEL
TROUBLESHOOTING
PRESS AND HOLD
AV AND AT , THEN
PRESS SLOPE TO
ENTER MONITOR
SCROLL TO EXERCISER
01 USING THE
TRIGGER MODE SWITCH
PRESS UP AND
RELEASE THE TRIGGER
COUPLING SWITCH TO
ENTER ROUTINE
YES
REPAIR FAULTY
MODE SWITCH
YES
PROBABLE CAUSE:
SHORTED DIODE ON
SUSPECT COLUMN
YES
PROBABLE CAUSE:
1) OPEN DIODE
2) BAD SWITCH
PROBABLE
CAUSE:
BAD
SWITCH
PRESS THE A/B
TRIG SELECT
BUTTON TO EXIT
THE MONITOR
MANUALLY
EXERCISE THE
FRONT-PANEL
SWITCHES AND
OBSERVE THE
ASSOCIATED LEDS
YES
MANUALLY EXERCISE
EACH POT , OBSERVING
THE CONTROL'S
FUNCTION
PROBABLE CAUSE:
AN INTERMITTENT
POT OR SWITCH
IS INTERRUPTING
FRONT-PANEL SCAN
PROBABLE CAUSE:
DEFECTIVE POT
REPAIR
INDICATED
FAULT
MOVE A FRONT-
PANEL SWITCH IN
ORDER TO UPDATE
THE LED DATA
MAIN
INSTRUMENT
IS NOT
PROPERLY
READING THE
POT'S VALUE
YES
CONTROL BOARD
FAULT
YES
EXTRA LEDS ARE LIT.
PROBABLE CAUSE:
DEFECTIVE SHIFT
REGISTER
PROBABLE CAUSE:
DEFECTIVE SHIFT
REGISTER
PROBABLE
CAUSE:
DEFECTIVE
LED(S)
MANUALLY EXERCISE
EACH SWITCH,
OBSERVING THE
CONTROL'S FUNCTION
YES
MAIN INSTRUMENT
IS NOT PROPERLY
READING THE
POT'S VALUE
PROBABLE CAUSE:
AN INTERMITTENT
POT OR SWITCH
IS INTERRUPTING
FRONT-PANEL SCAN
PROBABLE CAUSE
DEFECTIVE POT
YES
REPAIR CONTROL
CIRCUITS IN THE
MAIN INSTRUMENT
REPAIR CONTROL
BOARD AND/OR
READOUT BOARD
6019-29A
-l 3
3D 3D
oo
S3
"I
©