SAFETY PRECA
SAFETY PRECA
SAFETY PRECA
SAFETY PRECA
SAFETY PRECAUTIONS
UTIONS
UTIONS
UTIONS
UTIONS
INDEX
INDEX
INDEX
INDEX
INDEX
SET 4554SET 4554SET 4554SET 4554SET 4554
MODEL CTMODEL CTMODEL CTMODEL CTMODEL CT
-32D20B (CHASSIS AP341)-32D20B (CHASSIS AP341)-32D20B (CHASSIS AP341)-32D20B (CHASSIS AP341)-32D20B (CHASSIS AP341)
PPPPPANASONICANASONICANASONICANASONICANASONIC
Horizontal Oscillator Disable Test ......... 1
IC Functions ........................................... 1
Important Parts Information ................... 1
Miscellaneous Adjustments .................... 1
Parts List ................................................. 4
Placement Chart ..................................... 1
Safety Precautions ..................................
1
Schematic Component Location ............ 2
Schematic Notes ..................................... 1
Schematics
Audio ............................................... 3
PIP ................................................... 4
Power Supply .................................. 2
System Control ................................ 2
Television ........................................ 2
Video ............................................... 3
Test Equipment ....................................... 1
Tuner Information .................................. 1
For Supplier Ad
For Supplier Ad
For Supplier Ad
For Supplier Ad
For Supplier Address,
dress,
dress,
dress,
dress,
See PHO
See PHO
See PHO
See PHO
See PHOTTTTTOF
OF
OF
OF
OFAAAAACT Ann
CT Ann
CT Ann
CT Ann
CT Annual Inde
ual Inde
ual Inde
ual Inde
ual Indexxxxx
MARCH
MARCH
MARCH
MARCH
MARCH 2002 SET 4554
2002 SET 4554
2002 SET 4554
2002 SET 4554
2002 SET 4554
P
P
P
P
PANASONIC
ANASONIC
ANASONIC
ANASONIC
ANASONIC
Model CT
Model CT
Model CT
Model CT
Model CT-32D20B (Chassis AP341)
-32D20B (Chassis AP341)
-32D20B (Chassis AP341)
-32D20B (Chassis AP341)
-32D20B (Chassis AP341)
4554
Technical Service Data
SER
SER
SER
SER
SERVICE
VICE
VICE
VICE
VICE WARNING
WARNING
WARNING
WARNING
WARNING
Only qualified service technicians who are familiar with safety checks
and guidelines should perform service work. Before replacing parts,
disconnect power source to protect electrostatically sensitive parts. Do
not attempt to modify any circuit unless so recommended by the
manufacturer. When servicing the receiver, use an isolation transformer
between the line cord and power receptacle.
SER
SER
SER
SER
SERVICING
VICING
VICING
VICING
VICING THE HIGH
THE HIGH
THE HIGH
THE HIGH
THE HIGH VVVVVOL
OL
OL
OL
OLTTTTTAAAAAGE AND CR
GE AND CR
GE AND CR
GE AND CR
GE AND CRTTTTT
Use EXTREME CAUTION when servicing the high voltage circuits. To
discharge static high voltage, connect a 10K ohms resistor in series with a
test lead between the receiver ground and CRT anode lead. DO NOT lift
the CRT by the neck. Always wear shatterproof goggles when handling
the CRT to protect eyes in case of implosion.
X-RA
X-RA
X-RA
X-RA
X-RAY RADIA
Y RADIA
Y RADIA
Y RADIA
Y RADIATION AND HIGH
TION AND HIGH
TION AND HIGH
TION AND HIGH
TION AND HIGH VVVVVOL
OL
OL
OL
OLTTTTTAAAAAGE LIMITS
GE LIMITS
GE LIMITS
GE LIMITS
GE LIMITS
Be aware of the instructions and procedures covering X-ray radiation. In
solid-state receivers and monitors, the CRT is the only potential source of
X-rays. Keep an accurate high voltage meter available at all times. Check
meter calibration periodically. Whenever servicing a receiver, check the
high voltage at various brightness levels to be sure it is regulating
properly. Keep high voltage at rated value, NO HIGHER. Excessive high
voltage may cause X-ray radiation or failure of associated components.
DO NOT depend on protection circuits to keep voltage at rated value.
When troubleshooting a receiver with excessive high voltage, avoid close
contact with the CRT. DO NOT operate the receiver longer than
necessary. To locate the cause of excessive high voltage, use a variable
AC transformer to regulate voltage. In present receivers, many electrical
and mechanical components have safety related characteristics which are
not detectable by visual inspection. Such components are identified by a
#####
on both the schematic and the parts list. For SAFETY, use only
equivalent replacement parts when replacing these components.
GENERAL GUIDELINES
GENERAL GUIDELINES
GENERAL GUIDELINES
GENERAL GUIDELINES
GENERAL GUIDELINES
Perform a final SAFETY CHECK before returning receiver to customer.
Check repaired area for poorly soldered connections, and check entire
circuit board for solder splashes. Check board wiring for pinched wires or
wires contacting any high wattage resistors. Check that all control knobs,
shields, covers, grounds, and mounting hardware have been replaced. Be
sure to replace all insulators and restore proper lead dress.
SAFETY CHECKS — FIRE AND SHOCK HAZARD
SAFETY CHECKS — FIRE AND SHOCK HAZARD
SAFETY CHECKS — FIRE AND SHOCK HAZARD
SAFETY CHECKS — FIRE AND SHOCK HAZARD
SAFETY CHECKS — FIRE AND SHOCK HAZARD
Cold Leaka
Cold Leaka
Cold Leaka
Cold Leaka
Cold Leakaggggge Chec
e Chec
e Chec
e Chec
e Checks f
ks f
ks f
ks f
ks for Receiver
or Receiver
or Receiver
or Receiver
or Receivers with Isolated Gr
s with Isolated Gr
s with Isolated Gr
s with Isolated Gr
s with Isolated Ground
ound
ound
ound
ound
Unplug the AC cord, connect a jumper across the plug prongs, and turn
the power switch on (if applicable). Use an ohmmeter to measure the
resistance between the jumped AC plug and any exposed metal cabinet
parts such as antenna screw heads, control shafts, or handle brackets.
Exposed metal parts with a return path should measure between 1M
ohms and 5.2M ohms. Parts without a return path must measure infinity.
Hot Leaka
Hot Leaka
Hot Leaka
Hot Leaka
Hot Leakaggggge Current Chec
e Current Chec
e Current Chec
e Current Chec
e Current Checkkkkk
Plug the AC cord directly into an AC outlet. DO NOT use an isolation
transformer. Use a 1500 ohms, 10W resistor in parallel with a .15µF
capacitor to connect between any exposed metal parts on the receiver and
a good earth ground. (See figure below.) Use an AC voltmeter with at
least 5000 ohms per volt sensitivity to measure the voltage across the
resistor. Check all exposed metal parts and measure voltage at each point.
Voltage measurements should not exceed .75VAC, 500µA. Any value
exceeding this limit constitutes a potential shock hazard and must be
corrected. If the AC plug is not polarized, reverse the AC plug and repeat
exposed metal part voltage measurement at each point.
The listing of any available replacement part herein in no case constitutes a recommendation, warranty, or guarantee by
SAMS Technical Publishing as to the quality and suitability of such replacement part. The numbers of the listed parts have
been compiled from information furnished to SAMS Technical Publishing by the manufacturers of the specific type of
replacement part listed.
Reproduction or use, without express permission, of editorial or pictorial content, in any manner, is prohibited. No patent
liability is assumed with respect to the use of the information contained herein.
© 2002
5436 West 78th Street
Indianapolis, IN 46268-4149
Printed in the United States of America 5 4 3 2 1
02PF01922
PPPPPaaaaaggggge 1
e 1
e 1
e 1
e 1 SET 4554
SET 4554
SET 4554
SET 4554
SET 4554
4554
4554
Essential co
Essential co
Essential co
Essential co
Essential covera
vera
vera
vera
veragggggeeeee
fffffor ser
or ser
or ser
or ser
or servicing a tele
vicing a tele
vicing a tele
vicing a tele
vicing a television receiver
vision receiver
vision receiver
vision receiver
vision receiver...
...
...
...
...
•
Sc
Sc
Sc
Sc
Schematics
hematics
hematics
hematics
hematics
•
Component locations
Component locations
Component locations
Component locations
Component locations
•
PPPPPar
ar
ar
ar
arts list
ts list
ts list
ts list
ts list
Representative Model
UPC
HERE
HORIZONT
HORIZONT
HORIZONT
HORIZONT
HORIZONTAL OSCILLA
AL OSCILLA
AL OSCILLA
AL OSCILLA
AL OSCILLATTTTTOR DISABLE
OR DISABLE
OR DISABLE
OR DISABLE
OR DISABLE TEST
TEST
TEST
TEST
TEST
Place a jumper between pins 3 and 4 of IC803. Apply 9.0V to the cathode of D001. Connect a
high voltage probe to the CRT anode. Set the AC supply to 45VAC. Turn the receiver on and
slowly increase the AC supply. Confirm the high voltage does not exceed 37.1kV when the
horizontal just begins to pull out of sync. If the high voltage should exceed 37.1kV or the
receiver fails to lose horizontal sync, the horizontal oscillator disable circuit should be repaired.
Remove jumper and the 9.0V DC supply.
Coverage includes these additional models and chassis:
Models
Models
Models
Models
Models
Chassis
Chassis
Chassis
Chassis
Chassis
CT-32D20UB
AP341
CT-32D30B
BP341
CT-32D30CB
BP341
CT-32D30UB
BP341
