fe, reliable operation of all
Funai Equipment. The service procedures recommended by Funai and de-
scribed in this service manual are effective methods of performing service
operations. Some of these service special tools should be used when and
as recommended.
It is important to note that this service manual contains various CAUTIONS
and NOTICES which should be carefully read in order to minimize the risk of
personal injury to service personnel. The possibility exists that improper
service methods may damage the equipment. It also is important to under-
stand that these CAUTIONS and NOTICES ARE NOT EXHAUSTIVE. Funai
could not possibly know, evaluate and advice the service trade of all con-
ceivable ways in which service might be done or of the possible hazardous
consequences of each way. Consequently, Funai has not undertaken any
such broad evaluation. Accordingly, a servicer who uses a service proce-
dure or tool which is not recommended by Funai must first use all precau-
tions thoroughly so that neither his safety nor the safe operation of the
equipment will be jeopardized by the service method selected.
TABLE OF CONTENTS
Specifications ........................................................ 1-1
Important Safety Precautions................................ 2-1
Standard Notes for Servicing ................................ 3-1
Disassembly Instructions ...................................... 4-1
Electrical Adjustment Instructions ......................... 5-1
Block Diagram....................................................... 6-1
Schematic Diagram / CBA's and Test Points ....... 7-1
Schematic Diagram .............................................. 7-3
CBA Views and Test Points.................................. 7-11
Wave Forms .......................................................... 8-1
Wiring Diagram...................................................... 9-1
IC Pin Function .................................................... 10-1
Cabinet Exploded View ....................................... 11-1
Packing Exploded View ....................................... 11-3
Mechanical Parts List .......................................... 12-1
Electrical Parts List .............................................. 13-1 1-1
L6650SP
SPECIFICATIONS
<TUNER>
ANT. Input ------------------- 75ohm Unbal., F type
Reference Level ----------- 20Vp-p (CRT Green Cathode)
Test Input Signal ---------- 400Hz 30% modulation
<DEFLECTION>
<VIDEO & CHROMA>
<AUDIO>
All items are measured across 8
load at speaker output terminal.
Note:
Nominal specifications represent the design specifications. All units should be able to approximate
these. Some will exceed and some may drop slightly below these specifications. Limit specifications
represent the absolute worst condition that still might be considered acceptable. In no case should
a unit fail to meet limit specifications.
Description
Condition
Unit
Nominal
Limit
1. Intermediate Freq.
Picture
Sound
MHz
MHz
45.75
41.25
-
-
2. Peak Picture Sens
VHF
CATV
UHF
dBµV
dBµV
dBµV
15
15
15
30
30
40
3. AFT Pull In Range (10mV input)
-
MHz
±2.2
±0.7
Description
Condition
Unit
Nominal
Limit
1. Deflection Freq.
Horizontal
Vertical
KHz
Hz
15.734
60
-
-
2. Linearity
Horizontal
Vertical
%
%
-
-
±15
±10
3. Over Scan
-
%
10
-
4. High Voltage
-
KV
29
-
Description
Condition
Unit
Nominal
Limit
1. Misconvergence
Center
Side
Corner
mm
mm
mm
-
-
-
0.4
1.5
2.1
2. Brightness
APL 100%
Ft-L
20
15
3. Color Temperature
-
°K
9200°K
-
4. Resolution
Horizontal
Vertical
Line
Line
250
300
-
-
Description
Condition
Unit
Nominal
Limit
1. Audio Output Power
10% THD
W
3
2.4
2. Audio Distortion (w/LPF)
500mW
%
1.0
7
3. Audio Freq. Response
-3dB
Hz
90~11K
- 2-1
L6115IMP
IMPORTANT SAFETY PRECAUTIONS
Prior to shipment from the factory, our products are strictly inspected for recognized product safety and electrical
codes of the countries in which they are to be sold. However, in order to maintain such compliance, it is equally
important to implement the following precautions when a set is being serviced.
Safety Precautions for TV Circuit
1. Before returning an instrument to the custom-
er, always make a safety check of the entire instru-
ment, including, but not limited to, the following
items:
a. Be sure that no built-in protective devices are de-
fective and have been defeated during servicing.
(1) Protective shields are provided on this chassis
to protect both the technician and the customer.
Correctly replace all missing protective shields, in-
cluding any removed for servicing convenience.
(2) When reinstalling the chassis and/or other as-
sembly in the cabinet, be sure to put back in place
all protective devices, including but not limited to,
nonmetallic control knobs, insulating fishpapers,
adjustment and compartment covers/shields, and
isolation resistor/capacitor networks. Do not oper-
ate this instrument or permit it to be operated
without all protective devices correctly in-
stalled and functioning. Servicers who defeat
safety features or fail to perform safety checks
may be liable for any resulting damage.
b. Be sure that there are no cabinet openings through
which an adult or child might be able to insert their
fingers and contact a hazardous voltage. Such
openings include, but are not limited to, (1) spac-
ing between the picture tube and the cabinet
mask, (2) excessively wide cabinet ventilation
slots, and (3) an improperly fitted and/or incorrectly
secured cabinet back cover.
c. Antenna Cold Check - With the instrument AC
plug removed from any AC source, connect an
electrical jumper across the two AC plug prongs.
Place the instrument AC switch in the on position.
Connect one lead of an ohmmeter to the AC plug
prongs tied together and touch the other ohmme-
ter lead in turn to each tuner antenna input ex-
posed terminal screw and, if applicable, to the
coaxial connector. If the measured resistance is
less than 1.0 megohm or greater than 5.2 mego-
hm, an abnormality exists that must be corrected
before the instrument is returned to the customer.
Repeat this test with the instrument AC switch in
the off position.
d. Leakage Current Hot Check - With the instru-
ment completely reassembled, plug the AC line
cord directly into a 120V AC outlet. (Do not use an
isolation transformer during this test.) Use a leak-
age current tester or a metering system that com-
plies with American National Standards Institute
(ANSI) C101.1 Leakage Current for Appliances
and Underwriters Laboratories (UL) 1410, (50.7).
With the instrument AC switch first in the on posi-
tion and then in the off position, measure from a
known earth ground (metal water pipe, conduit,
etc.) to all exposed metal parts of the instrument
(antennas, handle brackets, metal cabinet, screw
heads, metallic overlays, control shafts, etc.), es-
pecially any exposed metal parts that offer an elec-
trical return path to the chassis. Any current
measured must not exceed 0.5 milli-ampere. Re-
verse the instrument power cord plug in the outlet
and repeat the test.
ANY MEASUREMENTS NOT WITHIN THE LIMITS
SPECIFIED HEREIN INDICATE A POTENTIAL
SHOCK HAZARD THAT MUST BE ELIMINATED
BEFORE RETURNING THE INSTRUMENT TO
THE CUSTOMER OR BEFORE CONNECTING
THE ANTENNA OR ACCESSORIES.
e. X-Radiation and High Voltage Limits - Because
the picture tube is the primary potential source of
X-radiation in solid-state TV receivers, it is special-
ly constructed to prohibit X-radiation emissions.
For continued X-radiation protection, the replace-
ment picture tube must be the same type as the
original. Also, because the picture tube shields
and mounting hardware perform an X-radiation
protection function, they must be correctly in place.
High voltage must be measured each time servic-
_
DEVICE
LEAKAGE
CURRENT
TESTER
ALSO TEST WITH
PLUG REVERSED
USING AC
ADAPTER PLUG
AS REQUIRED
TEST ALL EXPOSED
METAL SURFACES
+
READING SHOULD
NOT BE ABOVE 0.5 mA
EARTH
GROUND
BEING
TESTED 2-2
L6115IMP
ing is performed that involves B+, horizontal de-
flection or high voltage. Correct operation of the X-
radiation protection circuits also must be recon-
firmed each time they are serviced. (X-radiation
protection circuits also may be called "horizontal
disable" or "hold down.") Read and apply the high
voltage limits and, if the chassis is so equipped,
the X-radiation protection circuit specifications giv-
en on instrument labels and in the Product Safety
& X-Radiation Warning note on the service data
chassis schematic. High voltage is maintained
within specified limits by close tolerance safety-re-
lated components/adjustments in the high-voltage
circuit. If high voltage exceeds specified limits,
check each component specified on the chassis
schematic and take corrective action.
2. Read and comply with all caution and safety-relat-
ed notes on or inside the receiver cabinet, on the
receiver chassis, or on the picture tube.
3. Design Alteration Warning - Do not alter or add
to the mechanical or electrical design of this TV re-
ceiver. Design alterations and additions, including,
but not limited to circuit modifications and the ad-
dition of items such as auxiliary audio and/or video
output connections, might alter the safety charac-
teristics of this receiver and create a hazard to the
user. Any design alterations or additions will void
the manufacturer's warranty and may make you,
the servicer, respon