Tektronix 2467B - Page 465

2465B/2467B Service
SEC/DIVKNOB
0UT7
IYES
,N0
11
PUSH
AUTO
BUTTON
YES
fc
PRESS
BEAM FIND
u
SWEEP TOUBLESHOOTING PROCEDURE
REPAIR PATH
FROM U700-45
TO U950-4
REMOVE
U700
REPAIR RAMP SIGNAL
PATH. CHECK U700.
U735, UBOO, AND INT-
ERCONNECTIONS, POWER
SUPPLIES AND CONTROL
SI6NALS TO UBOO
(HSA.HSB, ANDPOS)
REPAIR
-1.25V
REFERENCE
PATH
REPAIR
FAULTY
SUPPLY
REPLACE
U700
(TRY SUBSTITUTING U900)
REPAIR
INDICATED
FAULT
NO
REINSTALL
U700
DISCONNECT ANY
WIRE CONNECTED
T0J102-5
IS THIS
A 24676?^,
YES
N0_^
REPAIR
H0LD0FF-TIMIN6
CURRENT SOURCE
_ REPAIR
SGSI6NALPATH
REPAIR
OPTION CIRCUIT
CONNECTED TO
J102-5
CHECK HOLDOFF
CURRENT SOURCE
AND HOLDOFF
RESET Q155.
0157.Q159,
Q160, U16BA,
U169A,U169F
PULL SEA" LOW WITH
A STRAP TO GNDFROM
U975-22 TEMPORARILY
REPAIR HOLDOFF
COMPARATOR, CHECK
U168B, Q158, 0161
TEMPORARILY
CONNECT A 10KO
RESISTOR FROM
U650-10T0+5V
REPLACE U700
TRY
SUBSTITUTING
U900
♦3.56V IS MEASURED AS -1.44V
WITH RESPECT TO THE *5V SUPPLY
REPLACE
U700
JEPAIR
CCORCD
T0U500
OR REPLACE
U500
REPLACE
0155
CHECK OR
REPLACE
U975
U650
TROUBLESHOOT
FAILING
CIRCUIT
CHECK
U975 0R
U985
YES
DISCONNECT
P411
REPAIR S6A ON
READOUT BD AS
CHECK U2880
AND U2B85
REMOVE CABLE
0NJ104IF AN
OPTION 6 OR 9
IS INSTALLED
YES
REPAIR SGA PATH
ON OPTION
6 0R9BD
NO
REPAIR
SI6NALPATH
is
fi°OB
i°
3o
©
6863-37*