Sanyo PLC-XP21N Service page 25

^AB^QRM^ POWER JLJEN^
TRUTH TABLE
1. Check that the Vcc and Vbb voltages are correct.
VCC (Logic supply) Pin6 of IC5501 and 1C5531
VBB (Load supply) Pin9, ] 6 of IC5501 and JC5531
2. Check that the FOCUS. ZOOM AV signal is correct.
Pinl 19 of IC801 (From Top Control SW.)
3. Check that the POWER FAIL signa! is correct.
Pml25 of IC801 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . H: Normal
4. Check that the FOCUS, ZOOM A V signals are correct.
Pinl43 of IC801 (From remote-control unit.)
5. Check that the FOCUS and ZOOM on/off signals are correct.
PinU,13ofIC809.
6. Check that the FOCUS and ZOOM Phase signals are correct.
PinlO,12of!C809.
7. Check that the FOCUS and ZOOM on/off signals are correct.
Pini of IC5501 and 1C5531.
8. Check that the FOCUS and ZOOM Phase signals are correct.
Pm7 of IC5501 and 1C5531.
9. Check lhat the FOCUS Output signals are correct-
PinlO. 15ofIC5501andPml, 2ofK8G.
10. Check that the ZOOM Output signals are correct.
PinIO, 15 of 1C5531 and Pin3, 4ofK8G.
ON/OFF Phase
H
H
L
H
L
-
H
L
L ^ L
L
H
OPERATtON
Forward(reverM) dtlva
ReverM(fot'ward) ddve
Braking
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