Panasonic CT32D20B - 32" COLOR TV User manual

SAFETY PRECASAFETY PRECA
SAFETY PRECASAFETY PRECA
SAFETY PRECAUTIONSUTIONS
UTIONSUTIONS
UTIONS
INDEXINDEX
INDEXINDEX
INDEX
SET 4554SET 4554 SET 4554SET 4554
SET 4554
MODEL CTMODEL CT MODEL CTMODEL CT
MODEL CT-32D20B (CHASSIS AP341)-32D20B (CHASSIS AP341)
-32D20B (CHASSIS AP341)-32D20B (CHASSIS AP341)
-32D20B (CHASSIS AP341)
PP PP
PANASONICANASONIC
ANASONICANASONIC
ANASONIC
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 AdFor Supplier Ad
For Supplier AdFor Supplier Ad
For Supplier Address,dress,
dress,dress,
dress,
See PHOSee PHO
See PHOSee PHO
See PHOTT
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TOFOF
OFOF
OFAA
AA
ACT AnnCT Ann
CT AnnCT Ann
CT Annual Indeual Inde
ual Indeual Inde
ual Indexx
xx
x
MARCHMARCH
MARCHMARCH
MARCH 2002 SET 45542002 SET 4554
2002 SET 45542002 SET 4554
2002 SET 4554
PP
PP
PANASONICANASONIC
ANASONICANASONIC
ANASONIC
Model CTModel CT
Model CTModel CT
Model CT-32D20B (Chassis AP341)-32D20B (Chassis AP341)
-32D20B (Chassis AP341)-32D20B (Chassis AP341)
-32D20B (Chassis AP341)
4554
Technical Service Data
SERSER
SERSER
SERVICEVICE
VICEVICE
VICE WARNINGWARNING
WARNINGWARNING
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.
SERSER
SERSER
SERVICINGVICING
VICINGVICING
VICING THE HIGHTHE HIGH
THE HIGHTHE HIGH
THE HIGH VV
VV
VOLOL
OLOL
OLTT
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TAA
AA
AGE AND CRGE AND CR
GE AND CRGE AND CR
GE AND CRTT
TT
T
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-RAX-RA
X-RAX-RA
X-RAY RADIAY RADIA
Y RADIAY RADIA
Y RADIATION AND HIGHTION AND HIGH
TION AND HIGHTION AND HIGH
TION AND HIGH VV
VV
VOLOL
OLOL
OLTT
TT
TAA
AA
AGE LIMITSGE LIMITS
GE LIMITSGE 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 GUIDELINESGENERAL GUIDELINES
GENERAL GUIDELINESGENERAL 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 HAZARDSAFETY CHECKS — FIRE AND SHOCK HAZARD
SAFETY CHECKS — FIRE AND SHOCK HAZARDSAFETY CHECKS — FIRE AND SHOCK HAZARD
SAFETY CHECKS — FIRE AND SHOCK HAZARD
Cold LeakaCold Leaka
Cold LeakaCold Leaka
Cold Leakagg
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ge Chece Chec
e Chece Chec
e Checks fks f
ks fks f
ks for Receiveror Receiver
or Receiveror Receiver
or Receivers with Isolated Grs with Isolated Gr
s with Isolated Grs with Isolated Gr
s with Isolated Groundound
oundound
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 LeakaHot Leaka
Hot LeakaHot Leaka
Hot Leakagg
gg
ge Current Chece Current Chec
e Current Chece Current Chec
e Current Checkk
kk
k
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
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for seror ser
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• ScSc
ScSc
Schematicshematics
hematicshematics
hematics
• Component locationsComponent locations
Component locationsComponent locations
Component locations
•PP
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Parar
arar
arts listts list
ts listts list
ts list
Representative Model
UPC
HERE
HORIZONTHORIZONT
HORIZONTHORIZONT
HORIZONTAL OSCILLAAL OSCILLA
AL OSCILLAAL OSCILLA
AL OSCILLATT
TT
TOR DISABLEOR DISABLE
OR DISABLEOR DISABLE
OR DISABLE TESTTEST
TESTTEST
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:
ModelsModels
ModelsModels
Models ChassisChassis
ChassisChassis
Chassis
CT-32D20UB AP341
CT-32D30B BP341
CT-32D30CB BP341
CT-32D30UB BP341

MISCELLANEOUS ADJUSTMENTS
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NOTE: This receiver employs digital customer controls. All adjustments are at
normalized position unless otherwise indicated.
B+ CHECKB+ CHECK
B+ CHECKB+ CHECK
B+ CHECK
Connect a digital DC voltmeter to pin 16 (P2) of T801 and the common tie point.
Set brightness and picture to minimum. With AC line voltage set to 120VAC, B+
should read 130V* ±1.0V*.
* Taken from a common tie point.
HIGHHIGH
HIGHHIGH
HIGH VV
VV
VOLOL
OLOL
OLTT
TT
TAA
AA
AGE CHECKGE CHECK
GE CHECKGE CHECK
GE CHECK
Tune in a picture. Set brightness and picture for a black raster. Connect a high
voltage probe to CRT anode. High voltage should read 30kV to 32kV.
PURITY CHECKPURITY CHECK
PURITY CHECKPURITY CHECK
PURITY CHECK
Press recall button on transmitter to enter purity check mode.
NOTE: Receiver must be in serviceman mode for purity colors to display on screen.
Press recall button to cycle through white, red, green, blue, and normal screens.
PURITYPURITY
PURITYPURITY
PURITY
Enter serviceman mode. See Purity Check to display a green raster. Loosen
deflection yoke and move it back as far as possible. Loosen locking ring and move
the purity tabs to center the vertical green band. Slowly slide the deflection yoke
forward until a uniform green screen is obtained.
CONVERGENCECONVERGENCE
CONVERGENCECONVERGENCE
CONVERGENCE
Connect a signal generator to antenna terminal and tune in a dot pattern. Adjust the
4-pole magnets to converge the red and blue dots at the center of the screen. Adjust
the 6-pole magnets to converge the red/blue dots over the green dots at the center of
the screen.
NOTE: Spread the two tabs of each set of magnets equally and opposite to converge
vertically, and rotate both tabs in the same direction to converge horizontally. Since
the four and six pole magnets interact, repeat the adjustment until center conver-
gence is correct.
Tune in a crosshatch pattern. Remove rubber wedges between the deflection yoke
and CRT. Tilt deflection yoke up or down to converge the vertical lines at the top
and bottom of the screen and the horizontal lines at the left and right sides of the
screen. Tilt the deflection yoke left or right to converge the horizontal lines at the
top and bottom of the screen and the vertical lines at the left and right sides of the
screen. Repeat convergence procedure if necessary to obtain the best overall
convergence. Replace rubber wedges.
CRCR
CRCR
CRT NECK ASSEMBLT NECK ASSEMBL
T NECK ASSEMBLT NECK ASSEMBL
T NECK ASSEMBLYY
YY
Y
ENTERING SERENTERING SER
ENTERING SERENTERING SER
ENTERING SERVICEMAN MODEVICEMAN MODE
VICEMAN MODEVICEMAN MODE
VICEMAN MODE
Turn the receiver on and momentarily short pins 3 and 8 of connector TP. In the
upper left side of the picture, CHK is displayed in yellow. Press the action and
volume up buttons on the receiver. The CHK display turns red. The serviceman
mode is indicated by CHK displayed in red at the upper left side of the picture. Press
the power button on the remote or the action and volume down buttons on the
receiver repeatedly to select one of seven service modes.
B = Sub Adjustments C = Cut-Off Adjustments
D = Pin Cushion Adjustments M = Stereo Adjustments
P = PIP Adjustments S = Options Adjustments
X = Comb Filter Adjustments
CHK = Normal operation of channel and volume buttons.
EXIT SEREXIT SER
EXIT SEREXIT SER
EXIT SERVICEMAN MODEVICEMAN MODE
VICEMAN MODEVICEMAN MODE
VICEMAN MODE
NOTE: Always exit serviceman mode when finished making adjustments.
Press action and power buttons on receiver control panel simultaneously for
approximately 2 seconds to exit serviceman mode. The receiver will display a self
check menu with audio on channel 3.
SUB ADJUSTMENTSSUB ADJUSTMENTS
SUB ADJUSTMENTSSUB ADJUSTMENTS
SUB ADJUSTMENTS
NOTE: Write down original On-set values in detail before making any adjustments
in case a misadjustment occurs. Press channel up or down buttons on remote to
select any of adjustment addresses. Press volume up or down buttons on remote to
change level of adjustment.
Sub Adjustment Range and Default Levels
AdjustmentAdjustment
AdjustmentAdjustment
Adjustment RangRang
RangRang
Rangee
ee
eDefault LeDefault Le
Default LeDefault Le
Default Levelvel
velvel
vel On-SetOn-Set
On-SetOn-Set
On-Set VV
VV
Valuealue
aluealue
alue
Sub Color (B0) 0-63 31 25
Sub Tint (B1) 0-63 31 47
Sub Brightness (B2) 0-63 31 44
Sub Contrast (B3) 0-31 16 26
Sub Tint Video (B4) 0-31 16 15
Sub Color Video (B5) 0-31 16 16
Sub Tint Component (B6) 0-127 63 58
Sub Color Component (B7) 0-63 31 41
Sub Sharp TV/Video (B8) 0-31 10 13
Sub Sharp Component (B9) 0-31 31 31
Sub Contrast Fixed (Ba) 0-31 15 31
Sub Color (B0)Sub Color (B0)
Sub Color (B0)Sub Color (B0)
Sub Color (B0)
Tune in a color bar signal. Connect oscilloscope to pin 1 of connector C1 on the C
board. Connect TPD2 to ground. Enter serviceman mode and select Sub adjustment.
Select sub color (B0). Adjust waveform for .9Vp-p ±.05Vp-p. Remove jumper.
SubSub
SubSub
Sub Tint (B1)Tint (B1)
Tint (B1)Tint (B1)
Tint (B1)
Tune in a color bar signal. Connect oscilloscope to pin 1 of connector C1 on the C
board. Connect TPD2 to ground. Enter serviceman mode and select Sub adjustment.
Select sub tint (B1). Adjust waveform so the 1st and 4th peaks are of equal
amplitude. Remove jumper.
Sub Brightness (B2)Sub Brightness (B2)
Sub Brightness (B2)Sub Brightness (B2)
Sub Brightness (B2)
This adjustment must be made after sub picture and color temperature adjustments
are made. DO NOT adjust screen after sub brightness is set. Connect a color bar
signal with pure white and pure black to the antenna input. Set color to minimum.
Enter serviceman mode and select Sub adjustment. Select sub brightness (B2).
Adjust until the black bars start to turn gray, then decrease adjustment until bars
turn black.
SUB Contrast (B3)SUB Contrast (B3)
SUB Contrast (B3)SUB Contrast (B3)
SUB Contrast (B3)
NOTE: This adjustment is factory set, DO NOT adjust unless CRT or C board is
replaced.
Connect a color bar signal to the antenna input. Connect oscilloscope to pin 2 of
connector C1 on C board. Connect TPD2 to ground. Enter serviceman mode and
select Sub adjustment. Select sub contrast (B3). Adjust for 2.8Vp-p ± .1Vp-p from
white to black level. Do not include sync tip in measurement. Remove jumper.
TEST EQTEST EQ
TEST EQTEST EQ
TEST EQUIPMENTUIPMENT
UIPMENTUIPMENT
UIPMENT
Test equipment listed by participating manufacturer illustrates typical or
equivalent equipment used by Sams engineers to obtain measurements.
This equipment is compatible with most types used by field service
technicians.
EquipmentEquipment
EquipmentEquipment
Equipment Sencore No.Sencore No.
Sencore No.Sencore No.
Sencore No.
Oscilloscope SC3100
Generators
RGB CM2125
Multiburst Signal VG91
Color Bar VG91
TV Stereo VG91
Digital VOM SC3100
Frequency Meter SC3100
Hi-Voltage Probe HP200
Accessory Probes TP212
Isolation Transformer PR570
Capacitance Analyzer LC102
CRT Analyzer CR7000
AC Leakage Tester PR570
Inductance Analyzer LC102
Flyback Yoke Tester TVA92
Field Strength Meter SL753
Transistor Tester TF46
Horizontal Analyzer HA-2500
Video Analyzer VG91, TVA92
MAINMAIN
MAINMAIN
MAIN TUNERTUNER
TUNERTUNER
TUNER VV
VV
VOLOL
OLOL
OLTT
TT
TAA
AA
AGE CHARGE CHAR
GE CHARGE CHAR
GE CHARTT
TT
T
PinPin
PinPin
Pin VHF LoVHF Lo
VHF LoVHF Lo
VHF Low Bandw Band
w Bandw Band
w Band VHF High BandVHF High Band
VHF High BandVHF High Band
VHF High Band UHF BandUHF Band
UHF BandUHF Band
UHF Band
(1) AGC 2.0V 2.1V 1.6V
(2) TU 1.1V 4.4V 5.4V
(3) ADRS 0V 0V 0V
(4) SCL 3.6V 3.6V 3.6V
(5) SDA 3.6V 3.6V 3.6V
(6) NC 0V 0V 0V
(7) +B 4.5V 4.5V 4.5V
(8) NC 0V 0V 0V
(9) BTL 4.2V 7.5V 8.5V
(10) NC 0V 0V 0V
(11) IF1 0V 0V 0V
(12) IF 0V 0V 0V
(13) BV 9.0V 9.0V 9.0V
(14) AUDIO .37V .37V .37V
(15) GND 0V 0V 0V
(16) AFT 1.9V 1.9V 1.9V
(17) AGC OUT 2.0V 2.1V 1.6V
(18) V 0V 0V 0V
(19) AGC CONT 0V 0V 0V
(20) GND 0V 0V 0V
(21) ST 0V 0V 0V
(22) BIL 0V 0V 0V
(23) MODE 0V 0V 0V
(24) F-MONO 0V 0V 0V
(25) MUTE 0V 0V 0V
(26) R 0V 0V 0V
(27) L 0V 0V 0V
NOTE: VHF Low Band voltages taken on channel 2.
VHF High Band voltages taken on channel 7.
UHF Band voltages taken on channel 14.
τ(1)
τ(9)
τ(7)
τ(5)
τ(3)
τ
τ
(2)
τ
(4)
τ
(6)
(8)
MAINMAIN
MAINMAIN
MAIN TUNERTUNER
TUNERTUNER
TUNER TERMINAL GUIDETERMINAL GUIDE
TERMINAL GUIDETERMINAL GUIDE
TERMINAL GUIDE
τ
(10)
τ(11)
τ
(12)
τ(13)
τ
(14)
τ(15)
τ
(16)
τ(17)
τ
(18)
τ(19)
τ
(20)
τ(21)
τ
(22)
τ(23)
τ
(24)
τ(25)
τ
(26)
τ(27)
TUNER INFORMATION

MISCELLANEOUS ADJUSTMENTS continued
SET 4554 PSET 4554 P
SET 4554 PSET 4554 P
SET 4554 Paa
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CUTCUT
CUTCUT
CUT-OFF ADJUSTMENTS-OFF ADJUSTMENTS
-OFF ADJUSTMENTS-OFF ADJUSTMENTS
-OFF ADJUSTMENTS
Follow same procedure used for Sub adjustments.
Cut-Off Adjustment Range and Default Levels
AdjustmentAdjustment
AdjustmentAdjustment
Adjustment RangRang
RangRang
Range Default Lee Default Le
e Default Lee Default Le
e Default Levelvel
velvel
vel On-SetOn-Set
On-SetOn-Set
On-Set VV
VV
Valuealue
aluealue
alue
Red Cutoff (C0) 0-255 128 62
Green Cutoff (C1) 0-255 128 79
Blue Cutoff (C2) 0-255 128 79
User Brightness (C3) 0-63 31 31
Green Drive (C4) 0-127 64 57
Blue Drive (C5) 0-127 64 56
Drive C Temp (C6) 0-127 8 8
Contrast C Temp (C7) 0-127 5 5
ColorColor
ColorColor
Color TT
TT
Temperature (C0,emperature (C0,
emperature (C0,emperature (C0,
emperature (C0, C1,C1,
C1,C1,
C1, C2,C2,
C2,C2,
C2, C4,C4,
C4,C4,
C4, C5 )C5 )
C5 )C5 )
C5 )
NOTE: Observe low and high brightness areas of a B/W picture for proper tracking.
Enter serviceman mode and select Cut-Off adjustments. Set the red cutoff (C0),
green cutoff (C1), and blue cutoff (C2) for a gray picture. Set the green drive (C4)
and the blue drive (C5) for correct white areas.
OPTIONS ADJUSTMENTSOPTIONS ADJUSTMENTS
OPTIONS ADJUSTMENTSOPTIONS ADJUSTMENTS
OPTIONS ADJUSTMENTS
Follow same procedure used for Sub adjustments.
Options Adjustment Range and Default Levels
DefaultDefault
DefaultDefault
Default On-SetOn-Set
On-SetOn-Set
On-Set
AdjustmentAdjustment
AdjustmentAdjustment
Adjustment RangRang
RangRang
Rangee
ee
eLeLe
LeLe
Levelvel
velvel
vel VV
VV
Valuealue
aluealue
alue
ABL Gain (S0) 0-3 3 3
ABL Point (S1) 0-3 3 3
RGB Brightness (S2) 0-15 8 8
RGB Gamma (S3) 0 , 1 1 1
Color Gamma (S4) 0 , 1 1 1
VSM-G (S5) 0 , 1 0 0
BS Point (S6) 0-7 7 6
Clock Adjust (S7) 0-255 128 109
Loud Comp (S8) 0-31 31 31
Caption Dig Filter SW (S9) 0 , 1 0 0
Caption Scroll (Sa) 0 - 2 1 1
RGB Matrix (Sb) 0-7 6 6
RGB Matrix Comp (Sc) 0-7 5 5
ClocCloc
ClocCloc
Clock Adjustment (S7)k Adjustment (S7)
k Adjustment (S7)k Adjustment (S7)
k Adjustment (S7)
Connect a frequency counter to pin 13 of IC001. Turn receiver off. Record the
frequency. Turn the receiver on and enter the serviceman mode and select options
adjustments. Select clock adjustment (S7). Adjust (S7) based on the following
formula:
(S7) = 128 + .901 X 1000000 [244.1406 - pin 13 (measured in Hz)]
244.1406
PIP ADJUSTMENTSPIP ADJUSTMENTS
PIP ADJUSTMENTSPIP ADJUSTMENTS
PIP ADJUSTMENTS
PIP adjustments can be entered but no adjustments should be necessary. They are
factory set for normal PIP performance. Write original On-set values in case one of
the adjustments is changed by mistake. Confirm that the values are as shown for
default level.
PIP Adjustment Range and Default Levels
DefaultDefault
DefaultDefault
Default On-SetOn-Set
On-SetOn-Set
On-Set
AdjustmentAdjustment
AdjustmentAdjustment
Adjustment RangRang
RangRang
Rangee
ee
eLeLe
LeLe
Levelvel
velvel
vel VV
VV
Valuealue
aluealue
alue
PIP Color (P0) 0-127 92 55
PIP Tint (P1) 0-255 54 54
PIP Brightness (P2) 0-31 22 5
PIP Contrast (P3) 0-127 80 55
Up 1/9 (P4) 0-255 26 26
Down 1/9 (P5) 0-255 143 143
Left 1/9 (P6) 0-255 10 10
Right 1/9 (P7) 0-255 101 101
Up 1/16 (P8) 0-255 26 26
Down 1/16 (P9) 0-255 160 160
Left 1/16 (Pa) 0-255 10 10
Right 1/16 (Pb) 0-255 116 116
PIP Freerun (Pc) N/A N/A 0
PIP YDL (Pd) 0-15 4 4
STEREO ADJUSTMENTSSTEREO ADJUSTMENTS
STEREO ADJUSTMENTSSTEREO ADJUSTMENTS
STEREO ADJUSTMENTS
All adjustments were made using a MTS TV / stereo generator connected to the
antenna terminal. Set the customer controls to normal listening levels and select
stereo mode.
MTS Adjustment Range and Default Levels
AdjustmentAdjustment
AdjustmentAdjustment
Adjustment RangRang
RangRang
Rangee
ee
eDefault LeDefault Le
Default LeDefault Le
Default Levelvel
velvel
vel On-SetOn-Set
On-SetOn-Set
On-Set VV
VV
Valuealue
aluealue
alue
Input Level (M0) 0-63 33 30
Low - Level Separation (M1) 0-15 6 7
High - Level Separation (M2) 0-63 25 28
Input LeInput Le
Input LeInput Le
Input Level (M0)vel (M0)
vel (M0)vel (M0)
vel (M0)
On generator select pilot, 1kHz audio frequency, and L+R modulating signal.
Connect an oscilloscope to pin 22 of IC2201. Enter serviceman mode and select
stereo adjustments. Select input level (M0). Adjust the data value for 1Vp-p.
High LeHigh Le
High LeHigh Le
High Level Separation (M1) and Lovel Separation (M1) and Lo
vel Separation (M1) and Lovel Separation (M1) and Lo
vel Separation (M1) and Low Lew Le
w Lew Le
w Level Separation (M2)vel Separation (M2)
vel Separation (M2)vel Separation (M2)
vel Separation (M2)
On generator select pilot, 300Hz audio frequency, and left modulating signal.
Connect an oscilloscope to pin 22 of IC2201. Enter serviceman mode and select
stereo adjustments. Select low level separation (M1). Adjust the data value for
minimum amplitude of waveform. On generator select 8kHz audio frequency. Select
high level separation (M2). Adjust the data value for minimum amplitude of the
waveform. Repeat until no further decrease in amplitude can be obtained.
COMB FILCOMB FIL
COMB FILCOMB FIL
COMB FILTER ADJUSTMENTSTER ADJUSTMENTS
TER ADJUSTMENTSTER ADJUSTMENTS
TER ADJUSTMENTS
NOTE: Write down original On-set values in detail before making any adjustments
in case a misadjustment occurs.
Comb Filter Adjustment Range and Default Levels
DefaultDefault
DefaultDefault
Default On-SetOn-Set
On-SetOn-Set
On-Set
AdjustmentAdjustment
AdjustmentAdjustment
Adjustment RangRang
RangRang
Rangee
ee
eLeLe
LeLe
Levelvel
velvel
vel VV
VV
Valuealue
aluealue
alue
Comb Clip Level (X0) 0 - 255 152 152
Comb Switch (X1) 0 - 63 12 12
Comb Limit (X2) 0 - 63 24 24
Comb Core (X3) 0 - 127 41 41
Comb RF Delay (X4) 0 - 127 20 19
Comb Video Delay (X5) 0 - 127 18 18
Comb VMLM (X6) 0 - 127 90 90
Comb VMCO (X7) 0 - 63 24 24
Comb Sharp (X8) 0 - 255 123 123
Comb VM Level (X9) 0 - 255 255 255
Comb VMPKF (Xa) 0 , 1 1 1
Comb H Lock Mode (Xb) 0 , 1 1 1
Comb H Lock (Xc) 0 - 511 70 60
Comb H Sep 1 (Xd) 0 - 511 313 313
Comb H Sep 2 (Xe) 0 - 511 266 266
Comb Sub H Lock Mode (Xf) 0 , 1 0 0
Comb Sub H Lock (X10) 0 - 511 70 70
Comb Sub H Sep 1 (X11) 0 - 511 313 313
Comb Sub H Sep 2 (X12) 0 - 511 266 266
PIN CUSHION ADJUSTMENTSPIN CUSHION ADJUSTMENTS
PIN CUSHION ADJUSTMENTSPIN CUSHION ADJUSTMENTS
PIN CUSHION ADJUSTMENTS
Follow same procedure used for Sub adjustments.
Pin Cushion Adjustment Range and Default Levels
DefaultDefault
DefaultDefault
Default On-SetOn-Set
On-SetOn-Set
On-Set
AdjustmentAdjustment
AdjustmentAdjustment
Adjustment RangRang
RangRang
Rangee
ee
eLeLe
LeLe
Levelvel
velvel
vel VV
VV
Valuealue
aluealue
alue
H Position (D0) 0 - 31 16 16
V Size (D1) 0 - 63 31 30
V S Correction (D2) 0 - 7 4 4
V Lin Correction (D3) 0 - 15 14 15
E/W Trapezium (D4) 0 - 15 8 8
V AGC (D5) 0 , 1 1 1
V Position (D6) 0 - 7 1 0
V Centering (D7) 0 - 127 63 63
V Centering DAC SW (D8) 0 , 1 0 0
V BLK Start Phase (D9) 0 - 31 12 7
V BLK Stop Phase (Da) 0 - 31 14 14
Horizontal Centering (D0)Horizontal Centering (D0)
Horizontal Centering (D0)Horizontal Centering (D0)
Horizontal Centering (D0)
Tune in a crosshatch pattern. Enter serviceman mode and select Pin Cushion
adjustments. Select horizontal position (D0) adjustment and adjust crosshatch
pattern for correct horizontal centering.
VV
VV
Verer
erer
ertical Siztical Siz
tical Siztical Siz
tical Size (D1)e (D1)
e (D1)e (D1)
e (D1)
Tune in a crosshatch pattern. Enter serviceman mode and select Pin Cushion
adjustments. Select vertical size (D1) adjustment and adjust crosshatch pattern for
little over scan at the top and the bottom of the screen.
ImporImpor
ImporImpor
Important Ptant P
tant Ptant P
tant Parar
arar
arts Infts Inf
ts Infts Inf
ts Informationormation
ormationormation
ormation
νThe parts listed here are those not
usually available from a well-stocked
supply cabinet or bin.
νWhere items may be replaced with
equivalent parts, several alternates are
shown from participating vendors.
νOn the parts lists, safety items are
marked with a ##
##
# to remind you that only
exact replacements are recommended
for these items.
νWhen ordering parts, state the model
number, part number, and description.
Obtaining PObtaining P
Obtaining PObtaining P
Obtaining Parar
arar
artsts
tsts
ts
Many of these parts are available from your
local Sams authorized distributor or the
manufacturer of the equipment. Call Sams
for the name of your nearest distributor:
800-428-7267
Or consult the Sams Annual Index for the
address of the original equipment
manufacturer.
PP
PP
Parar
arar
articipatingticipating
ticipatingticipating
ticipating VV
VV
Vendorendor
endorendor
endorss
ss
s
Information on test equipment and
replacement parts is listed in these pages
for the following participating vendors.
Consult the Sams Annual Index for their
current address.
νNTE Electronics, Inc. (NTE)
νSencore, Inc.

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PANASONIC MODEL CTANASONIC MODEL CT
ANASONIC MODEL CTANASONIC MODEL CT
ANASONIC MODEL CT-32D20B (CHASSIS AP341)-32D20B (CHASSIS AP341)
-32D20B (CHASSIS AP341)-32D20B (CHASSIS AP341)
-32D20B (CHASSIS AP341)

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