How to solve problems indicated by the Error Indication
(The symptom of all errors is that the Lamp goes off)
Note: Before performing the troubleshooting, confirm that all connector cables in the unit are connected correctly.
Problem
Possible Solution
Lamp does not light up.
[LAMP Indicator two blinks]
Lamp communication error.
[LAMP Indicator three blinks]
[LAMP Indicator four blinks]
[LAMP Indicator five blinks]
Cooling Fan (Lamp Fan) malfunction.
[LAMP Indicator eight blinks]
Cooling Fan (OPT Fan) malfunction.
[LAMP Indicator nine blinks]
Cooling Fan (Front Fan or Rear Fan) malfunction.
[LAMP Indicator ten blinks]
Cooling Fan (Rear Fan or Front Fan) malfunction.
[LAMP Indicator eleven blinks]
Rear Jack P.C.B. connection error.
[LAMP Indicator twelve blinks]
Abnormal Lamp input voltage (+26V)
Normal: +26V
Abnormal: less than +20V
[LAMP Indicator thirteen blinks]
LAMP
Indicator
2
3
4
5
8
9
10
11
12
13
1. Relocate the unit to a proper location.
Keep the unit at least 100 mm (4") away from the wall to provide proper ventilation
because warm air is discharged. Blocking the ventilation opening of the cooling fan may
damage the unit.
2. Wait until the Lamp has cooled off (approximately 1 hour) and try to turn on the power several times.
3. If still NG, check whether the Fans rotate normally and Fan voltages, and repair if necessary.
2. If still NG, replace the Lamp Unit.
2. If still NG, replace the Lamp Unit.
1. Try to turn on the power several times. (Wait 5 minutes before retrying.)
2. If still NG, check that Connector CN1 and CN151 on the RF AMP Power Supply P.C.B. are
connected firmly.
3. If still NG, unplug the AC Cord and disconnect CN151 connector cable and check the
voltage at Pin 1,2 or 3 of CN151 on the RF AMP Power Supply P.C.B. See Figure a.
If OK (+26V), replace the Lamp Unit.
4. If NG, check the voltage between Pin 1 and Pin 2 of CN1 on the RF Amp Power Supply P.C.B.
If OK (AC120V), replace the RF Amp Power Supply P.C.B.
If NG, check the Power P.C.B.
(Refer to "CHECKING THE POWER P.C.B.")
1. Try to turn on the power several times. (Wait 5 minutes before retrying.)
2.If still NG, check that the cable between CN6005 on the Main P.C.B. and the Lamp Unit
is connected firmly.
3. If still NG, replace the Lamp Unit.
4. If still NG, check signal of the LAMP TXD, LAMP RXD line at Pin 1, 7 of CN6005 on the
Main P.C.B. and check the following parts on the Main P.C.B., and replace if necessary.
• Q6017, Q6018, R6169, R6193 and the surrounding parts.
1. Check that Connector CN2753 on the Rear Jack P.C.B. is connected firmly.
2. If still NG, replace the Lamp Fan.
3. If still NG, check IC2754 and surrounding parts, and replace if necessary.
1. Check that Connector CN2754 on the Rear Jack P.C.B. is connected firmly.
2. If still NG, replace the Fan Case Unit (OPT Fan).
3. If still NG, check IC2753 and surrounding parts on the Rear Jack P.C.B., and replace
if necessary.
1. Check that Connector CN2751 or CN2752 on the Rear Jack P.C.B. is connected firmly.
2. If still NG, check whether the Front Fan or Rear Fan stopped and replace it.
3. If still NG, check IC2751 and surrounding parts on the Rear Jack P.C.B., and replace
if necessary.
1. Check that Connector CN2752 or CN2751 on the Rear Jack P.C.B. is connected firmly.
2. If still NG, check whether the Front Fan or Rear Fan stopped and replace it.
3. If still NG, check IC2751 and surrounding parts on the Rear Jack P.C.B., and replace
if necessary.
1. Check that Connector CN3501 on the Rear Jack P.C.B. is connected into Connector
CN3001 on the Main P.C.B. firmly.
2. If still NG, check the following parts at FAN SOS line between Pin 29 of CN3001 and
Pin 117 of IC6004 on the Main P.C.B., and replace if necessary.
• R6025, IC6004, and the surrounding parts.
1. Try to turn on the power several times. (Wait 5 minutes before retrying.)
1. Try to turn on the power several times. (Wait 5 minutes before retrying.)
4. If still NG, replace the Lamp Unit.
Lamp Fan
OPT Fan
Front Fan
Rear Fan
Fan
Check Point
Voltage
CN2753 (Pin 1) or TP2758
CN2754 (Pin 1) or TP2757
CN2751 (Pin 1) or TP2759
CN2752 (Pin 1) or TP2759
7.0 V
6.0 V ~ 6.5 V
8.0 V
8.0 V
Lamp failure (Internal Lamp thermistor open or short).
Abnormal Lamp temperature (more than 92 ˚C).
(Normal ~ High)
PT-56LCX70 / PT-61LCX70 / PT-50LCX7 / PT-56LCX7 / PT-61LCX7
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