Power Lens System Abnormality - Sanyo PLC-XF40 Service Manual

POWER LENS SYSTEM ABNORMALITY

1. Check that the Vcc-voltages are correct.
2. Check that the POWER FAIL signal is correct.
Pin125 of IC801
3. Check that the LENS SHIFT up and down signals are correct.
Pins 6 and 7 of K8E
4. Check that the LENS SHIFT left and right signals are correct.
Pins 8 and 9 of K8E
5. Check that the FOCUS up and down signals are correct.
Pins 10 and 11 of K8E
6. Check that the ZOOM up and down signals are correct.
Pins 12 and 13 of K8E
7. Check that the TOP DET. signal is correct.
Pin 2 of K8E
8. Check that the BOTTOM DET. signal is correct.
Pin 1 of K8E
9. Check that the CENTER DET. signal is correct.
Pin 17 of K8E
10. Check that the LEFT DET. signal is correct.
Pin 9 of K8N
11. Check that the RIGHT DET. signal is correct.
Pin 10 of K8N
12. Check that the CENTER DET. signal is correct.
Pin 11 of K8N
1. Check that the Vcc-voltages are correct.
2. Check that the POWER FAIL signal is correct.
Pin14 of K16A.
3. Check that the LENS SHIFT up and down signals are correct.
Pins 5 and 6 of IC1631.
4. Check that the LENS SHIFT left and right signals are correct.
Pins 5 and 6 of IC1621.
5. Check that the FOCUS up and down signals are correct.
Pins 5 and 6 of IC1611.
6. Check that the ZOOM up and down signals are correct.
Pins 5 and 6 of IC1601.
7. Check that the LENS SHIFT motor drive signals are correct.
Pins 10 and 2 of IC1631 and IC1621.
8. Check that the FOCUS motor drive signals are correct.
Pins 10 and 2 of IC1611.
9. Check that the ZOOM motor drive signals are correct.
Pins 10 and 2 of IC1601.
---- Horizontal shift function does not exist in some particular models. -----
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K8N
9
LEFT DET.
11
CENTER DET.
Horizontal shift function does not exist
10
RIGHT DET.
in some particular models.
Therefore IC1621, K8N, etc. do
not exist in those models.
K8E
K16A
TOP DET. 2 2 TOP DET.
CENTER DET. 17 17 CENTER DET.
BOTTOM DET. 1 1 BOTTOM DET.
MOTOR_EN MOTOR_EN
LENS_L SHIFT L
8 8
LENS_R SHIFT R
9 9
MOTOR_EN
12 12
ZOOM+
ZOOM +
ZOOM -
ZOOM- 13 13
MOTOR_EN
FOCUS+ 10 10 FOCUS +
FOCUS- 11 11 FOCUS -
I/O
EXPANDER
IC1801
MOTOR_EN
6 6
LENS_UP
LENS_UP
LENS_DOWN
LENS_DOWN 7 7
14 14
P_FAIL
25
CPU IC801
Assembly Main
H: Normal
L : TOP
L : BOTTOM
Center position=The edge of "H to L" or "L to H."
L : LEFT
L : RIGHT
Center position=The edge of "H to L" or "L to H."
Assembly Motor audio
H: Normal
manuals search engine
Troubleshooting
Motor-driven lens system.
K16H
TOP DET.
CENTER DET.
BOTTOM DET.
IC1621
4
Horizontal
2 LENS_L
5 shift
10 LENS_R
6 7, 8
IC1601
4
ZOOM
ZOOM-
2
MOTOR DRIVE
5
ZOOM+
10
6 7, 8
IC1611
IC1611
4
FOCUS
2 FOCUS-
MOTOR DRIVE
5
10
FOCUS+
6 7, 8
IC1631
4
Vertical
LENS-UP
2
shift
5
LENS-DOWN
10
6 7, 8
P_FAIL
16V
ASSY MOTOR & AUDIO
Motor drive IC block diagram
LB1641/1645N
+B 8
4
VZ
Truth table
Input
5
H L
L H
L L
-29-
(Zoom, Focus and lens shift.)
H
L
The waveform edges are center positions.
( H to L and L to H )
Projection lens and lens shift system
Horizontal shift function does not exist
in some particular models.
S1
S2
S3
M
10 2
S1
S2
1
S1=ON , OTHER=OFF
S2=ON , OTHER=OFF
S3=ON , OTHER=OFF
IC1601/IC1611/IC1621/IC1631
Output
6 2 10
H L
Forward(reverse) drive
L H
Reverse(forward) drive
L L
5
INPUT
ON/OFF
CONTROL
INPUT
6
FORWARD (reverse) DRIVE
REVERSE (forward) DRIVE
BRAKING
<FF>
Operation
Braking