Power Lens System Abnormality - Sanyo PLC-EF31 Service Manual

POWER LENS SYSTEM ABNORMALITY

LEFT DET.
CENTER DET.
RIGHT DET.
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
CPU IC801
I
Assembly Main
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 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."
I
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.
---- Horizontal shift function does not equip in some particular models. -----
K8N
9
11
Horizontal shift function does not exist
10
in some particular models.
Therefore IC1621, K8N, etc. do
not exist in those models.
K8E
K16A
TOP DET.
2 2
17 17 CENTER DET.
1 1 BOTTOM DET.
4
Horizontal
MOTOR_EN
shift
8 8 SHIFT L 5
SHIFT R 6
9 9
4
MOTOR_EN
ZOOM
12 12
MOTOR DRIVE
ZOOM +
5
ZOOM - 6
13 13
4
MOTOR_EN FOCUS
MOTOR DRIVE
FOCUS + 5
10 10
11 11 FOCUS - 6
4
Vertical
MOTOR_EN
6 6
LENS_UP
5 shift
LENS_DOWN
6
7 7
14 14
P_FAIL
25
H: Normal
L : TOP
L : BOTTOM
L : LEFT
L : RIGHT
H: Normal
Troubleshooting
Motor-driven lens system.
K16H
TOP DET.
CENTER DET.
BOTTOM DET.
IC1621
2 LENS_L
10 LENS_R
7, 8
IC1601
ZOOM-
2
ZOOM+
10
7, 8
IC1611
IC1611
2 FOCUS-
10
FOCUS+
7, 8
IC1631
LENS-UP
2
LENS-DOWN
10
7, 8
16V
ASSY MOTOR & AUDIO
Motor drive IC block diagram
LB1641/1645N
+B 8
4
VZ
Truth table
Input
5 6
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
2
10
S1
S2
1
S1=ON , OTHER=OFF
S2=ON , OTHER=OFF
S3=ON , OTHER=OFF
IC1601/IC1611/IC1621/IC1631
Output
2 10
H L
Forward(reverse) drive
L H
Reverse(forward) drive
L L
5 INPUT
ON/OFF
CONTROL
6 INPUT
FORWARD (reverse) DRIVE
REVERSE (forward) DRIVE
BRAKING
<FF>
Operation
Braking