Sanyo PLC-XF30 Service Manual page 23

LAMP ABNORMALITY -2
Troubleshooting
Check the unit P.F.C..
Caution : "HOT" Circuit !
Check! UNIT PFC
U20B34600
CN1B
AC-INPUT
AC 90V~264V
TEMP. SW
12V (+B)
RL12
PFC-2 ON/OFF
IC1801
H: ON
I /O EXP.
PFC-1 ON/OFF
H: ON
CN2B
Check! Check!
Check the unit lamp Ballast.
Caution : "HOT" Circuit !
UNIT LAMP BALLAST
K7B
STABILISER
UNIT P.F.C.
( CHOPPER )
DC INPUT
DC380~400V
Check!
K7A
Check!
LAMP MONITOR
IC1801
H : Abnormality
I/O EXP.
LAMP ON/OFF
H : ON
MAINS ISOLATION
Check!
Has not the temperature
switch operated?
Check!
If the temperature around
FET reaches 85 degrees, the
PFC circuit will be shut down.
OUTPUT
DC 380V~400V
LAMP
BALLAST-1
CN3B
PFC-1
BALLAST-1 ON/OFF
CONTROL
LAMP-1 MONITOR
FET
TEMP. SW
85˚C
LAMP
BALLAST-2
CN4B
PFC-2
BALLAST-2 ON/OFF
CONTROL
LAMP-2 MONITOR
FET
TEMP. SW
85˚C
When the temperature
around a lamp driver reaches
Check!
85 degrees, unit lamp ballast
will be shut down and a lamp
monitor signal changes to H
from L.
U20B39500/39800
LAMP
K7C
ASS'Y
LAMP
IGNITER
DRIVER
TEMP.
SENSOR 85˚C
Output voltage.
At the time of a start : 20KVp-p
At the time of stability : AC 85V typ. (70~100V)
Output Frequency : 88 Hz typ.
CONTROL
When this output voltage
reaches abnormal voltage
(exceeds AC-130V), unit lamp
Check!
ballast will be shut down and a
lamp monitor signal changes
from L to H.
-28-
POWER LENS SYSTEM ABNORMALITY
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.
4
MOTOR_EN MOTOR_EN Horizontal
LENS_L SHIFT L 5 shift
8 8
LENS_R 9 9 SHIFT R 6
4
MOTOR_EN ZOOM
12 12
ZOOM+ ZOOM + MOTOR DRIVE
5
ZOOM -
ZOOM- 13 13 6
4
MOTOR_EN FOCUS
MOTOR DRIVE
FOCUS+ 10 10 FOCUS + 5
FOCUS- 11 11 FOCUS - 6
I/O
EXPANDER
IC1801
4
MOTOR_EN Vertical
6 6
LENS_UP
LENS_UP 5 shift
LENS_DOWN 6
LENS_DOWN 7 7
14 14
P_FAIL P_FAIL
25
CPU IC801
Assembly Main
1. Check that the Vcc-voltages are correct.
2. Check that the POWER FAIL signal is correct.
Pin125 of IC801 H: Normal
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 L : TOP
8. Check that the BOTTOM DET. signal is correct.
Pin 1 of K8E L : BOTTOM
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 L : LEFT
11. Check that the RIGHT DET. signal is correct.
Pin 10 of K8N L : RIGHT
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. H: Normal
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. -----
Troubleshooting
Motor-driven lens system.
(Zoom, Focus and lens shift.)
H
K16H
L
TOP DET.
CENTER DET.
BOTTOM DET.
IC1621
The waveform edges are center positions.
2 LENS_L ( H to L and L to H )
10 LENS_R
7, 8
Projection lens and lens shift system
IC1601
2 ZOOM-
ZOOM+
10
7, 8
IC1611
IC1611
2 FOCUS-
10 FOCUS+
7, 8
IC1631
2 LENS-UP
10 LENS-DOWN
7, 8
Horizontal shift function does not exist
in some particular models.
16V
ASSY MOTOR & AUDIO
Motor drive IC block diagram
LB1641/1645N
+B 8
S1
S2
S3
10 M 2
S1
S2
4 1
VZ
S1=ON , OTHER=OFF
S2=ON , OTHER=OFF
S3=ON , OTHER=OFF
Truth table IC1601/IC1611/IC1621/IC1631
Input Output
5 6 2 10
H L H L Forward(reverse) drive
L H L H
Reverse(forward) drive
L L L L
-29-
5
INPUT
ON/OFF
CONTROL
INPUT
6
FORWARD (reverse) DRIVE
REVERSE (forward) DRIVE
BRAKING
<FF>
Operation
Braking