Power Lens System Abnormality - Sanyo PLC-XF41 Service Manual
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Also See for PLC-XF41:
- Owner's manual (56 pages) ,
- Specifications (1 page) ,
- Dimensional drawing (1 page)
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POWER LENS SYSTEM ABNORMALITY
K8N
LEFT DET.
CENTER DET.
RIGHT DET.
K8E
TOP DET.
CENTER DET.
BOTTOM DET.
MOTOR_EN
LENS_L
LENS_R
ZOOM+
ZOOM-
FOCUS+
FOCUS-
I/O
EXPANDER
IC1801
LENS_UP
LENS_DOWN
P_FAIL
73
CPU
IC801
Assembly Main
1. Check that the Vcc-voltages are correct.
2. Check that the POWER FAIL signal is correct.
Pin14 of K8E
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
Center position=The edge of "H to L" or "L to H."
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
Center position=The edge of "H to L" or "L to H."
Assembly Motor audio
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.
9
11
Horizontal shift function does not exist
10
in some particular models.
Therefore IC1621, K8N, etc. do
not exist in those models.
K16A
2
2
TOP DET.
17
17
CENTER DET.
BOTTOM DET.
1
1
IC1621
4
Horizontal
MOTOR_EN
SHIFT L
5
shift
8
8
9
9
SHIFT R
6
7, 8
IC1601
4
MOTOR_EN
ZOOM
12
12
MOTOR DRIVE
ZOOM +
5
ZOOM -
13
13
6
7, 8
IC1611
IC1611
4
MOTOR_EN
FOCUS
MOTOR DRIVE
10
10
FOCUS +
5
11
11
FOCUS -
6
7, 8
IC1631
4
MOTOR_EN
Vertical
6
6
LENS_UP
shift
5
LENS_DOWN
6
7, 8
7
7
14
14
P_FAIL
16V
ASSY MOTOR & AUDIO
H: Normal
L : TOP
L : BOTTOM
L : LEFT
L : RIGHT
H: Normal
-
Troubleshooting
Motor-driven lens system.
K16H
TOP DET.
CENTER DET.
BOTTOM DET.
2
LENS_L
10
LENS_R
ZOOM-
2
ZOOM+
10
2
FOCUS-
10
FOCUS+
LENS-UP
2
LENS-DOWN
10
K16G
Zoom and focus motor drive feature does
not exist in some particular projection lens
Motor drive IC block diagram
LB1641/1645N
+B
8
S2
S1
4
VZ
Truth table
Input
5
6
H
L
L
H
L
L
-37-
(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
S1
S3
M
2
10
S2
1
S1=ON , OTHER=OFF
FORWARD (reverse) DRIVE
S2=ON , OTHER=OFF
REVERSE (forward) DRIVE
S3=ON , OTHER=OFF
BRAKING
IC1601/IC1611/IC1621/IC1631
Output
Operation
2
10
H
L
Forward(reverse) drive
L
H
Reverse(forward) drive
L
L
Braking
5
INPUT
ON/OFF
CONTROL
6
INPUT
<FF>
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