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COLOR REAR VIDEO PROJECTOR
SERVICE MANUAL
RA-4B CHASSIS
MODEL NAME
REMOTE COMMANDER
DESTINATION
CHASSIS NO.
KP-53HS10
RM-Y902
US
SCC-P40A-A
KP-53HS10
RM-Y902
Canadian
SCC-P40A-A
KP-61HS10
RM-Y902
US
SCC-P40B-A
KP-61HS10
RM-Y902
Canadian
SCC-P40B-A
HISTORY INFORMATION FOR THE FOLLOWING MANUAL:
ORIGINAL MANUAL ISSUE DATE: 3/2000
.
REVISION DATE
REVISION TYPE
SUBJECT
3/2000
No revisions or updates are applicable at this time.
6/2002
Correction - 1
D Board Corrections - Q5031 Voltage; Waveforms.
1/2004
Update
Updated P. 205 of Electrical Parts List - Corrected P/N for
F6105 and F6106


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CHASSIS
RA-4B
SERVICE MANUAL
MODEL
COMMANDER
DEST. CHASSIS NO.
­­­­­­­­
­­­­­­­­­­­­­­­ ­­­­­­
­­­­­­­­­­­­­­
KP-53HS10
RM-Y902
US
SCC-P40A-A
KP-53HS10
RM-Y902
Canadian
SCC-P40A-A
KP-61HS10
RM-Y902
US
SCC-P40B-A
KP-61HS10
RM-Y902
Canadian
SCC-P40B-A
MODEL
COMMANDER
DEST. CHASSIS NO.
­­­­­­­­
­­­­­­­­­­­­­­­ ­­­­­­
­­­­­­­­­­­­­­
53
61
Please file according to model size. .......
COLOR REAR VIDEO PROJECTOR
KP-53HS10
RM-Y902
KP-61HS10
TV
2
5
8
0
1
4
7
3
6
9
DISPLAY
TV/VIDEO
ANT
JUMP
ENTER
MENU
RESET
VOL
CH
MUTING
TV
OFF
AUDIO
SWAP
TV/DBS
PICTURE
MODE
GUIDE
ACTIVE
POTITION
LEFT
RIGHT
ZOOM IN
FREEZE
POWER
SYSTEM
OFF
DVD/
VTR
DBS
CABLE
FUNCTION
DVD/VTR DBS/CABLE
TV
CC


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­ 2 ­
KP-53HS10/61HS10
RM-Y902
RM-Y902
SPECIFICATIONS


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­ 3 ­
KP-53HS10/61HS10
RM-Y902
RM-Y902
SAFETY CHECK-OUT
( US model only )
After correcting the original service problem, perfom the follow-
ing safety checks before releasing the set to the customer:
l.
Check the area of your repair for unsoldered or poorly-sol-
dered connections. Check the entire board surface for solder
splashes and bridges.
2. Check the interboard wiring to ensure that no wires are
"pinched" or contact high-wattage resistors.
3. Check that all control knobs, shields, covers, ground straps,
and mounting hardware have been replaced. Be absolutely
certain that you have replaced all the insulators.
4. Look for unauthorized replacement parts, particularly tran-
sistors, that were installed during a previous repair. Point them
out to the customer and recommend their replacement.
5. Look for parts which, through functioning, show obvious
signs of deterioration. Point them out to the customer and
recom mend their replacement.
6. Check the line cords for cracks and abrasion. Recommend
the replacement of any such line cord to the customer.
7. Check the condition of the monopole antenna (if any). Make
sure the end is not broken off, and has the plastic cap on it.
Point out the danger of impalement on a broken antenna to
the customer, and recommend the antenna's replacement.
8. Check the B+ and HV to see they are at the values specified.
Make sure your instruments are accurate;be suspicious of
your HV meter if sets always have low HV.
9. Check the antenna temminals, metal trim, "metallized" knobs,
screws, and all other exposed metal parts for AC leakage.
Check leakage as described below.
LEAKAGE TEST
The AC leakage from any exposed metal part to earth ground and
from all exposed metal parts to any exposed metal part having a
return to chassis, must not exceed 0.5mA (500 microampers) . Leak-
age current can be measured by any one of three methods.
1. A commercial leakage tester, such as the Simpson 229 or
RCA WT-540A. Follow the manufacturers' instructions to
usc these instruments.
2. A battery-operated AC milliammeter. The Data Precision 245
digital multimeter is suitable for this job.
3. Measuring the voltage drop across a resistor by means of a
VOM or battery-operated AC voltmeter. The "limit" indica-
tion is 0.75V, so analog meters must have an accurate low-
voltage scale. The Simpson 250 and Sanwa SH-63Trd are
examples of a passive VOM that is suitable. NearIy all bat-
tery operated digital multimeters that have a 2V AC range
are suitable. (See Fig. A)
HOW TO FIND A GOOD EARTH GROUND
A cold-water pipe is guaranteed earth ground;the cover-plate re-
taining screw on most AC outlet boxes is also at earth ground. If
the retaining screw is to be used as your earth-ground, verify that it
is at ground by measuring the resistance between it and a cold-
water pipe with an ohmmeter. The reading should be zero ohms. If
a cold-water pipe is not accessible, connect a 60-l00 watts trouble
light (not a neon lamp) between the hot side of the receptacle and
the retaining screw. Try both slots, if necessary, to locate the hot
side of the line, the lamp should light at normal brilliance if the
screw is at ground potential. (See Fig. B)
To Exposed Metal
Parts on Set
AC
voltmeter
(0.75V)
1.5k
Earth Ground
Fig. A. Using an AC voltmeter to check AC leakage.
1.5
µ F
Fig. B. Checking for earth ground.
Trouble Light
AC Outlet Box
Ohmmeter
Cold-water Pipe


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­ 4 ­
KP-53HS10/61HS10
RM-Y902
RM-Y902
SELF DIAGNOSIS FUNCTION
* : 000 the range of values for number of operations is 000-255. For 256 or higher there is
no count up and the number remains at 255.
3.
Blinking count display of TIMER/STAND BY indicator
1.
Summary of Self-Diagnosis Function
·
This device includes a self-diagnosis function.
·
In case of abnormalities, the TIMER/STAND BY indicator automatically blinks. It is possible to predict the abnormality location
by the number of blinks. The Instruction Manual describes blinking of the TIMER/STAND BY indicator.
·
If the symptom is not reproduced sometimes in case of a malfunction, there is recording of whether a malfunction was generated
or not. Operate the remote command to confirm the matter on the screen and to predict the location of the abnormality.
2.
Diagnosis Items and Prediction of Malfunction Location
·
When a malfunction occurs the TIMER/STAND BY indicator only blinks for one of the following diagnosis items. In case of
two or more malfunctions, the item which first occurred blinks. If the malfunctions occurred simultaneously, the item with the
lower blink count blinks first.
·
The screen display displays the results regarding all the diagnosis items listed below. The display " 0 " means that no malfunc-
tions occurred.
Lamp OFF :
3.0 seconds
Lamp ON : 0.3 seconds
Lamp OFF : 0.3 seconds
Release of TIMER/STAND BY indicator blinking.
·
The TIMER/STAND BY indicator blinking display is released by turning OFF the power switch
on the TV main unit or removing the plug from the power.
* One blink is not used for self-diagnosis.
·EXAMPLE
<Diagnosis Items>
<Number of Blinks>
· +B overcurrent
2 times
· +B overvoltage
3 times
· Vertical deflection stop
4 times
< FRONT PANEL >
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