MODE L 3562A
FAU LT I SOLAT ION
J4.
Press the l ine switch off.
1 5. Connect the A1 5 Keyboard cable
(W1 0)
to the A1 2 Mother board.
NOTE
The keyboard cable (W1 0) can easily be connected wrong! After
connecting the cable, verify that both rows of pins are connected.
1 6. Press the l ine switch on. The L E Ds pass sequence shou ld occur (it takes about
40s
to complete) and A2 DS1 should be off. If the LEDs pass sequence does not occur,
the probable cause of the fail u re is the A1 5 Keyboard system bus interface circu its
(go to 8-1 5).
1 7. The soft keys should now be active and the d isplay appear as shown in figure 7-3.
O n ly the GLOBAL RAM and TEST K EYBD tests are valid. I f the soft keys are not
active or the display is defective, either the A8 G lobal RAM, A1 5 Keyboard, or
A1 7 Display I nterface is probably defective. If possible, press the keys as fol l ows:
SPCL
FCTN
NOTE
If the displa y is blank or garbled, the soft key menus may be
unreadable. The number of the soft key [51 through 58 from top
to bottom) for this procedure appears in parentheses after the soft
key name.
. . . . . . S E RVIC
TEST (52)
. . . . . . TEST
PROC (53)
. . . . . . RETURN (58) . . . . . . TEST '
. . . . . . TEST
K EYBD (54)
MEMORY (52) . . . . . . G LOBAL
RAM (51 )
1 8. The A1 7 Display I nterface o r the d isplay control ler subblock on the A8 G lobal
RAM may be causing the fai l u re (the self-tests do not verify these circu its). If the
display does not appear as shown in figure 7-3, refer to paragraph 8-1 1 to test the
display interface and d isplay contro l ler circu its.
1 9. Press the line switch off and replace the A9 FFT.
20. Press the l ine switch on. The L E Ds pass sequence should occur and A2 DS1 should
be off. If the L E Ds pass sequence does not occur, go to part E. I f the fau lt has
not been found, continue with part D.
7-1 3
Summary of Contents for 3562A
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Page 16: ...GEN ERAL INFORMATION MODEL 3562 T bJe 1 3 Specifications cont 1 10 ...
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Page 207: ...MODEL 3562A CR Cl ...
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Page 213: ...r A1 a pQWERSuP PLY I 03562 66518 REV A REV 8 8MPOUT 58 58 FRONT REAR P ANEL ii O N ...
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Page 237: ...Sample Clock SAMP DS DATA oe _ _ _ _ _ BUS NOTE FULL SPA BASi BAI MODE ...
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Page 259: ...WRITEL A22L l cc E Vl 8 MHz A23L ASL Inverting A1L A21 L D rivers r ...
Page 305: ...c c I O Sequencer S r J Sequence Decoder ...
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Page 324: ...EXT TRIGGER TRIG 1 TRIG 2 CALTRIG CNTLD COMI W CNTCLK LDTRGL RESETL ...
Page 327: ... RH r I N EXT BUFFER SAMPLE _ _ _ IN ...
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