JVC AV-20FD22 User manual

No. 51821
Mar. 2001
A
V-20FD22
COPYRIGHT © 2001 VICTOR COMPANY OF JAPAN, LTD.
AV-20FD22
CONTENTS
 SPECIFICATIONS㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯
㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯
㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯 㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯
㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯
㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯 㨯㨯
㨯㨯㨯㨯
㨯㨯2
䃨
OPERATING INSTRUCTIONS (APPENDED)
 SAFETY PRECAUTIONS㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯
㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯
㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯 㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯
㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯
㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯 3
 SPECIFIC SERVICE INSTRUCTIONS 㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯
㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯
㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯 㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯
㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯
㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯
 SERVICE ADJUSTMENTS 㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯
㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯
㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯 㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯
㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯
㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯 13
 GUIDE FOR REPAIRING 㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯
㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯
㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯 㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯
㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯
㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯 18
䃨
STANDARD CIRCUIT DIAGRAM (APPENDED)
 PARTS LIST 㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯
㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯
㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯 㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯
㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯
㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯 㨯㨯㨯㨯
㨯㨯㨯㨯㨯㨯㨯㨯
㨯㨯㨯㨯 32
SERVICE MANUAL
TV/DVD COMBO

10
AV-20FD22
SERVICE MODE LIST
This unit provided with the following SERVICE MODES so you can repair, examine and adjust easily.
To enter the Service Mode, press both set key and remote control key.
Press both the VOL. key and remocon keys simultaneously for more than 1 second.
Press both the STOP key and remocon keys simultaneously for more than 3 seconds.
Set Key Remocon Key Operations
Initialization of the factory on TV.
NOTE: No operation at DVD mode.
Do not use this for the normal servicing.
Initialization of the factory on DVD.
NOTE: The operation will work only with STOP mode at DVD mode.
Do not use this for the normal servicing.
VOL. (-) MIN 1
POWER ON total hours are displayed on the screen.
Refer to the "CONFIRMATION OF USING HOURS".
NOTE: No operation at DVD mode.
Can be checked of the INITIAL DATA of MEMORY IC on TV.
Refer to the "NOTE FOR THE REPLACING OF MEMORY IC".
NOTE: No operation at DVD mode.
VOL. (-) MIN 3
VOL. (-) MIN 6
VOL. (-) MIN 0Releasing of V-CHIP PASSWORD.
Writing of EEPROM initial data on TV.
NOTE: No operation at DVD mode.
Do not use this for the normal servicing.
VOL. (-) MIN 9 Display of the Adjustment MENU on the screen.
Refer to the "ELECTRICAL ADJUSTMENT" (On-Screen Display Adjustment).
STOP 7
STOP 9 Self-Diagnosis will operate.
Refer to the "SELF-DIAGNOSIS"
Releasing of PARENTAL LOCK.
NOTE: The operation will work only with STOP mode at DVD mode.
VOL. (-) MIN 8
CONFIRMATION OF USING HOURS
POWER ON total hours can be checked on the screen. Total hours are displayed in 16 system of notation.
1.
2.
3.
Set the VOLUME to minimum.
Press both VOL. DOWN button on the set and Channel
button (6) on the remote control for more than 1 second.
After the confirmation of using hours, turn off the power.
INIT 00 83
0010
CRT ON
ADDRESS DATA
FIG. 1
Initial setting content of MEMORY IC.
POWER ON total hours.
= (16 x 16 x 16 x thousands digit value)
+ (16 x 16 x hundreds digit value)
+ (16 x tens digit value)
+ (ones digit value)

11
AV-20FD22
SELF-DIAGNOSIS
The Self-Diagnosis function will operate when both STOP button on the set and Channel button (9) on the remote control are
pressed simultaneously (for more than 3 seconds) at DVD LOGO screen with No Disc.
NOTE: No diagnosis of FL CHECK on the TV/DVD Player.
Diagnosis Items Diagnosis Method/Result Assumed Defects
1. FL CHECK "FL" will appear on the TV Monitor. Then all indicators will turn on and go out.
All light up (3 seconds) ---> All go out (1 second) ---> All light up all the time
Sight check if all the indicators will turn on or go out.
AV PCB
Power Block
2. SRAM CHECK "SRAM" will appear on the TV Monitor. Then non-specific data will be read
and written on the non-specific address.
If no problem on read and write, "OK" will appear. If any problems, "NG" will
appear.
Syscon PCB
3. VIDEO ENCODER CHECK Color bar and Black/White bar will appear alternately on the TV Monitor.
Color bar (1 second) ---> Black/White bar (1 second) ---> Color bar (1 second)
Sight check if correct color appears or Color and Black/White bar appears
alternately.
Syscon PCB
Power Block
4. TRAY CHECK "TRAY : OPEN" will appear on the TV Monitor. Then the tray will be opened
completely and "TRAY : CLOSE" will appear. Then the tray will be closed.
Sight check if the tray opens or closes correctly.
Syscon PCB
Drive Unit
Power Block
5. EEPROM CHECK "EEPROM" will appear on the TV Monitor. Then non-specific data will be read
and written on the non-specific address.
If no problem on read and write, "OK" will appear. If any problems, "NG" will
appear.
Syscon PCB
6. AUDIO DAC CHECK "ADAC" will appear on the TV Monitor. Then the pink noise will output from
RCA.
Lch ---> Rch ---> Lch+Rch
Check by ear if audio outputs correctly.
Syscon PCB
AV PCB
7. SDRAM "SDRAM" will appear on the TV Monitor. Then non-specific data will be read
and written on the non-specific address.
If no problem on read and write, "OK" will appear. If any problems, "NG" will
appear.
Syscon PCB
After the diagnosis, the results only for the SRAM, EEPROM and SDRAM will appear on the TV Monitor.
In case of OK, "PASS" will appear for the each diagnosis.
RESULT
PASS : SRAM
PASS : EEPROM
PASS : SDRAM
To finish the Self-Diagnosis, turn off the power on the Main unit.

12
AV-20FD22
NOTE FOR THE REPLACING OF MEMORY IC
If a service repair is undertaken where it has been required to change the MEMORY IC, the following steps should be taken to
ensure correct data settings while making reference to TABLE 1.
F9 43 05 01 F1 23 27 F7 81 CD
+0 +1 +2 +3 +4 +5 +6 +7 +8 +9 +A +B +C +D +E +FINI
64 67 69 2A 6B 6C 6D 6E 6F
54 74 55 75 75 56 56 76 76 57
78 59 59 79 79 5A 5A 7A 7A 5B
7C 5D 7D 7D 5E 5E 7E 7E 5F
D9 3F 3F 40 61 6300
10 26 70 71 52 72 53 73
20 57 77 77 58 58 78
30 5B 7B 7B 5C 5C 7C
40 5D 5F 5F 7F 7F BF B7
B9 A1 C5 00 C7 00 00 00 97
D9 B0 84 88 9A 9F 2A 5A 00 00
50 AC AF 7F A8 B8 B4 7A
60 00 10 --- --- --- ---
INIT 00 83
0010
CRT ON
ADDRESS DATA
3.
4.
5.
6.
7.
8.
The unit will now have the correct DATA for the new MEMORY IC.
Table 1
1.
2.
Fig. 1
Enter DATA SET mode by setting VOLUME to minimum.
Press both VOL. DOWN button on the set and Channel button (6) on the remote control for more than 1 second.
ADDRESS and DATA should appear as FIG 1.
ADDRESS is now selected and should "blink". Using the VOL. UP/DOWN button on the remote, step through the
ADDRESS until required ADDRESS to be changed is reached.
Press ENTER to select DATA. When DATA is selected, it will "blink".
Again, step through the DATA using VOL. UP/DOWN button until required DATA value has been selected.
Pressing ENTER will take you back to ADDRESS for further selection if necessary.
Repeat steps 3 to 6 until all data has been checked.
When satisfied correct DATA has been entered, turn POWER off (return to STANDBY MODE) to finish DATA input.

13
AV-20FD22
ELECTRICAL ADJUSTMENTS
1.
Read and perform these adjustments when repairing the
circuits or replacing electrical parts or PCB assemblies.
CAUTION
•
•
•
•
Use an isolation transformer when performing any
service on this chassis.
Before removing the anode cap, discharge electricity
because it contains high voltage.
When removing a PCB or related component, after
unfastening or changing a wire, be sure to put the wire
back in its original position.
Inferior silicon grease can damage IC's and transistors.
When replacing IC's and transistors, use only specified
silicon grease.
Remove all old silicon before applying new silicon.
Prepare the following measurement tools for electrical
adjustments.
BEFORE MAKING ELECTRICAL
ADJUSTMENTS
1. Oscilloscope
2. Digital Voltmeter
3. AC Voltmeter
4. Pattern Generator
2. BASIC ADJUSTMENTS
2-1: CONSTANT VOLTAGE
1.
2.
3.
4.
Set condition is AV MODE without signal.
Using the remote control, set the brightness and contrast
to normal position.
Connect the digital voltmeter to TP401.
Adjust the VR502 until the digital voltmeter is 111 ±0.5V.
Fig. 1-2
NO.
01
02
03
04
05
06
07
08
09
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
FUNCTION
BRI. AV(CENT.)
BRI. AV(MAX)
BRI. AV(MIN)
COL. AV(CENT.)
COL. AV(MAX)
COL. AV(MIN)
TINT AV
SUB CONTRAST AV
CONT. AV(CENT.)
CONT. AV(MAX)
CONT. AV(MIN)
SHARPNESS AV
BRI. DVD(CENT.)
BRI. DVD(MAX)
BRI. DVD(MIN)
COL. DVD(CENT.)
COL. DVD(MAX)
COL. DVD(MIN)
TINT DVD
SUB CONTRAST DVD
CONT. DVD(CENT.)
CONT. DVD(MAX)
CONT. DVD(MIN)
SHARPNESS DVD
BRI. GAME(CENT.)
BRI. GAME(MAX)
BRI. GAME(MIN)
CONT. GAME(CENT.)
CONT. GAME(MAX)
CONT. GAME(MIN)
TUNING V MUTE
POWER ON V MUTE
INPUT LEVEL
SEPARATION L
SEPARATION H
CUT OFF
NO .
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
FUNCTION
R CUT OFF
G CUT OFF
B CUT OFF
G DRIVE
B DRIVE
BRIGHTNESS(CENT.)
BRIGHTNESS(MAX)
BRIGHTNESS(MIN)
COLOR(CENT.)
COLOR(MAX)
COLOR(MIN)
TINT
SUB CONTRAST
CONTRAST(CENT.)
CONTRAST(MAX)
CONTRAST(MIN)
SHARPNESS
RGB CONTRAST
H POSITION
V POSITION
V SIZE
V LINEARITY
V S CORRECTION
EW PARABOLA CORR.
EW TRAPEZIUM CORR.
H SIZE
V EHT
H EHT
RF AGC
V CENTERING
CORNER CORR. TOP
CORNER CORR. BTM
OSD H
FM LEVEL
TEST PWM
TEST TONE CONTROL
2-2: RF AGC
1.
2.
3.
4.
5.
Receive the VHF HIGH (63dB).
Place the set with Aging Test for more than 15 minutes.
Connect the digital voltmeter between the pin 5 of
CP101 and the pin 1 of CP101.
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (29) on the remote control to
select "AGC".
Press the VOL. UP/DOWN button on the remote
control until the digital voltmeter is 2.7 ±0.05V.
2-3: CUT OFF
1.
2.
3.
4.
5.
6.
Adjust the unit to the following settings.
G DRIVE=3F, B DRIVE=3F, R CUT OFF=7F, G CUT
OFF=7F, B CUT OFF=7F
Place the set with Aging Test for more than 15 minutes.
Set condition is AV MODE without signal.
Using the remote control, set the brightness and contrast
to normal position.
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (72) on the remote control to
select "CUT OFF".
Adjust the Screen Volume until a dim raster is obtained.
On-Screen Display Adjustment
In the condition of NO indication on the screen.
Press the VOL. DOWN button on the set and the
Channel button (9) on the remote control for more than
1 second to appear the adjustment mode on the screen
as shown in Fig. 1-1.
1.
Fig. 1-1
Use the Channel UP/DOWN button or Channel button
(1-0) on the remote control to select the options shown
in Fig. 1-2.
Press the TV MENU button on the remote control to
end the adjustments.
2.
3.
01 RCUT
3E
Function
Step No.
SERVICE ADJUSTMENT

14
AV-20FD22
ELECTRICAL ADJUSTMENTS
2-4: WHITE BALANCE
NOTE: Adjust after performing CUT OFF adjustment.
1.
2.
3.
4.
5.
6.
7.
8.
Place the set with Aging Test for more than 15 minutes.
Receive the white 100% signal from the Pattern
Generator.
Using the adjustment control, set the brightness and
contrast to normal position.
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (01) on the remote control to
select "RCUT".
Using the VOL. UP/DOWN button on the remote control,
adjust the RCUT.
Press the CH. UP/DOWN button on the remote control to
select the "GDRV", "BDRV", "GCUT" or "BCUT".
Using the VOL. UP/DOWN button on the remote control,
adjust the GDRV, BDRV, GCUT or BCUT.
Perform the above adjustments 6 and 7 until the white
color is looked like a white.
2-5: FOCUS
1.
2.
3.
Receive the monoscope pattern.
Turn the Focus Volume fully counterclockwise once.
Adjust the Focus Volume until picture is distinct.
2-6: HORIZONTAL POSITION
1.
2.
3.
4.
Receive the center cross signal from the Pattern
Generator.
Using the remote control, set the brightness and
contrast to normal position.
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (19) on the remote control to
select "HPOSI".
Press the VOL. UP/DOWN button on the remote
control until the right and left screen size of the vertical
line becomes the same.
2-7: HORIZONTAL SIZE
NOTE: Adjust after performing adjustments in section 2-6.
1.
2.
3.
4.
Receive the monoscope pattern.
Using the remote control, set the brightness and
contrast to normal position.
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (26) on the remote control to
select "WIDS".
Press the VOL. UP/DOWN button on the remote
control until the SHIFT quantity of the OVER SCAN on
right and left becomes 10 ±2%.
2-8: VERTICAL LINEALITY
NOTE: Adjust after performing adjustments in section 2-7.
1.
2.
3.
4.
Receive the center cross signal from the Pattern
Generator.
Using the remote control, set the brightness and
contrast to normal position.
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (22) on the remote control to
select "VLIN".
Press the VOL. UP/DOWN button on the remote
control until the upside and downside screen size of the
horizontal line becomes the same.
2-9: VERTICAL SHIFT
NOTE: Adjust after performing adjustments in section 2-8.
2-10: VERTICAL SIZE
NOTE: Adjust after performing adjustments in section 2-9.
1.
2.
3.
4.
Receive the center cross signal from the Pattern
Generator.
Using the remote control, set the brightness and
contrast to normal position.
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (20) on the remote control to
select "VPOSI".
Press the VOL. UP/DOWN button on the remote
control until the horizontal line becomes fit to the notch
of the shadow mask.
1.
2.
3.
4.
5.
Receive the crosshatch signal from the Pattern
Generator.
Using the remote control, set the brightness and
contrast to normal position.
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (21) on the remote control to
select "VSIZE".
Press the VOL. UP/DOWN button on the remote
control until the rectangle on the center of the screen
becomes square.
Receive a broadcast and check if the picture is normal.
2-11: PARABOLA CORR
1.
2.
3.
4.
Receive the crosshatch signal from the Pattern
Generator.
Using the remote control, set the brightness and
contrast to normal position.
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (24) on the remote control to
select "DPCS".
Press the VOL. UP/DOWN button on the remote control
until the right and left vertical lines are straight.
1.
2.
3.
4.
2-12: TRAPEZIUM
Receive the crosshatch signal from the Pattern
Generator.
Using the remote control, set the brightness and contrast
to normal position.
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (25) on the remote control to
select "KEYS".
Press the VOL. UP/DOWN button on the remote control
until the both vertical lines of the screen become parallel.
2-13: CORNER CORR TOP
1.
2.
3.
4.
Receive the crosshatch signal from the Pattern
Generator.
Using the remote control, set the brightness and
contrast to normal position.
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (31) on the remote control to
select "CNRT".
Press the VOL. UP/DOWN button on the remote control
until the upper section of the both ends vertical lines are
straight.

15
AV-20FD22
ELECTRICAL ADJUSTMENTS
1.
2.
3.
4.
2-14: CORNER CORR BOTTOM
Receive the crosshatch signal from the Pattern
Generator.
Using the remote control, set the brightness and
contrast to normal position.
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (32) on the remote control to
select "CNRB".
Press the VOL. UP/DOWN button on the remote control
until the bottom section of the both ends vertical lines
are straight.
2-15: OSD HORIZONTAL
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (33) on the remote control to
select "OSD".
Press the VOL. UP/DOWN button on the remote control
until the difference of A and B becomes minimum.
(Refer to Fig. 2-1)
1.
2.
B
AFig. 2-1
33 OSD
15
1.
2.
3.
4.
Receive the VHF HIGH (70dB).
Connect the AC voltmeter to TP901.
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (69) on the remote control to
select "LVL".
Press the VOL. UP/DOWN button on the remote control
until the AC voltmeter is 75 ±2mV.
2-16: LEVEL
1.
2.
3.
4.
5.
6.
7.
8.
9.
2-17: SEPARATION L/H
Receive the stereo signal (L=2KHz, R=400Hz).
Connect the AC voltmeter to AUDIO OUT JACK though
stereo filter (L=400Hz, R=2KHz).
Press the AUDIO button on the remote control to set to
the STEREO mode.
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (70) on the remote control to
select "SEPAL".
Press the VOL. UP/DOWN button on the remote control
until the output of L-CH and R-CH become minimum.
Press the CH UP button once the set to "SEPAH" mode.
Press the VOL. UP/DOWN button on the remote control
until the output of L-CH and R-CH become minimum.
Press the CH DOWN button once the set to "SEPAL"
mode.
Repeat step 5 to step 8 several times.
The output difference of the between with Filter and
without Filter should be more than 20dB for both L and R.
2-18: SUB BRIGHT CENTER
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
Receive the monoscope pattern. (RF Input)
Using the remote control, set the brightness and
contrast to normal position.
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (06) on the remote control to
select "BRTC".
Press the VOL. UP/DOWN button on the remote control
until the white 15% is starting to be visible
Receive the monoscope pattern. (Audio Video Input)
Press the INPUT button on the remote control to set to
the AV mode.
Using the remote control, set the brightness and
contrast to normal position.
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (37) on the remote control to
select "BRTCA".
Press the VOL. UP/DOWN button on the remote control
until the white 15% is starting to be visible
Press the TV/DVD button on the remote control to set to
the DVD mode.
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (49) on the remote control to
select "BRTCD".
Press the VOL. UP/DOWN button on the remote control
to set the same step numbers as the AV.
2-19: SUB CONTRAST MAX
1.
2.
3.
4.
5.
6.
7.
8.
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (15) on the remote control to
select "CNTX".
Press the VOL. UP/DOWN button on the remote
control until the contrast step No. becomes "6F"
Press the INPUT button on the remote control to set to
the AV mode.
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (46) on the remote control to
select "CNTXA".
Press the VOL. UP/DOWN button on the remote
control until the contrast step No. becomes "71"
Press the TV/DVD button on the remote control to set
to the DVD mode.
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (58) on the remote control to
select "CNTXD".
Press the VOL. UP/DOWN button on the remote
control until the contrast step No. becomes "71"

16
AV-20FD22
ELECTRICAL ADJUSTMENTS
2-20: SUB TINT CENTER
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
Receive the color bar pattern. (RF Input)
Using the remote control, set the brightness, contrast,
color and tint to normal position.
Connect the oscilloscope to TP803.
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (12) on the remote control to
select "TNTC".
Press the VOL. UP/DOWN button on the remote control
until the waveform becomes as shown in Fig. 2-2.
Receive the color bar pattern. (Audio Video Input)
Press the INPUT button on the remote control to set to
the AV mode.
Using the remote control, set the brightness, contrast,
color and tint to normal position.
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (43) on the remote control to
select "TNTCA".
Press the VOL. UP/DOWN button on the remote control
until the waveform becomes as shown in Fig. 2-2.
Press the TV/DVD button on the remote control to set to
the DVD mode.
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (55) on the remote control to
select "TNTCD".
Press the VOL. UP/DOWN button on the remote control
until the waveform becomes as shown in Fig. 2-2.
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
2-21: SUB COLOR CENTER
Receive the color bar pattern. (RF Input)
Using the remote control, set the brightness, contrast,
color and tint to normal position.
Connect the oscilloscop to TP801.
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (09) on the remote control to
select "COLC".
Adjust the VOLTS RANGE VARIABLE knob of the
oscilloscope until the range between white 100% and
0% is set to 4 scales on the screen of the oscilloscope.
Press the VOL. UP/DOWN button on the remote control
until the red color level is adjusted to 120 ±5% of the
white level. (Refer to Fig. 2-3)
Receive the color bar pattern. (Audio Video Input)
Press the INPUT button on the remote control to set to
the AV mode.
Using the remote control, set the brightness, contrast,
color and tint to normal position.
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (40) on the remote control to
select "COLCA".
Adjust the VOLTS RANGE VARIABLE knob of the
oscilloscope until the range between white 100% and
0% is set to 4 scales on the screen of the oscilloscope.
Press the VOL. UP/DOWN button on the remote control
until the red color level is adjusted to 120 ±5% of the
white level. (Refer to Fig. 2-3)
Press the TV/DVD button on the remote control to set to
the DVD mode.
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (52) on the remote control to
select "COLCD".
Press the VOL. UP/DOWN button on the remote control
to increase the step numbers by 3 steps to the AV.
0%
Fig. 2-3
White 0%
White 100%
100%
Red Level
Fig. 2-2

20
AV-20FD22
TROUBLESHOOTING GUIDE
NO POWER(1)
(TV SECTION)
Check of AT +8V line and AT
+5V line.
YES
Is the voltage at
pin1 of Q505
DC7.3V?
NO
YES
NO
YES
NO
YES
NO
Q510,Q509,Q503
OK? Check Q510,Q509,Q503 and TV
POWER H Line.
Check IC501 and associated
circuit.
When it pushed
POWER ON SW as for
LED is it lighted?
Is the voltage at
pin34 of IC101
DC4.7V?
Check Q505 and associated
circuit.
Check IC101 and associated
circuit.

21
AV-20FD22
TROUBLESHOOTING GUIDE
NO POWER(2)
Change of F501.
YES
Is the voltage at
pin8 of T501
DC170V?
NO
YES
NO
YES
NO
YES
NO
Change of T501.
Check IC501 and associated
circuit and change of Q505.
F501 OK?
Check D501 and associated
circuit.
Is the voltage at pin4
of IC501 DC18V and
pin5 2V? Change of IC501.
YES
NO Check I503 and associated
circuit.
Is the voltage at pin1 of
IC501 DC16V?
Is the voltage at pin1 of
Q505 DC7.3V?

22
AV-20FD22
TROUBLESHOOTING GUIDE
NO SOUND
INSERT CD301 & CD302.
YES
Is the voltage at
pin1 of IC302
DC6.6V?
NO
YES
NO
YES
NO
YES
NO
Check SPEAKER,
HEADPHONE and IC301.
CD301&CD302 INSERT OK?
Check SOUND +B Line.
Is the voltage at
pin5 of IC302
DC3.9V?
Q301 OK? Check Q301 and A_MUTE Line.
YES
NO Check MONITER_A_R
Line,MONITER_A_L Line
and associated circuit.
Check TV POWER H Line and
associated circuit.
Is audio signal
input from pin55 of
IC601?

23
AV-20FD22
TROUBLESHOOTING GUIDE
NO PICTURE
YES
Is the voltage at
pin23,36,53 of
IC601 DC9V?
NO
YES
NO
YES
NO
YES
NO
Check P.CON+9V Line.
Is the voltage at
pin2,13 of IC601
DC5V?
Check IC601 and associated
circuit.
YES
NO
Check CHROMA+5V Line.
Is VIDEO signal
output from pin55
of IC601?
Is CHROMA signal
input from pin42,47
of IC601?
Check IC601 and associated
circuit.
Is VIDEO signal
output from pin25
of IC701?
NO
YES
Check Q702 and associated
circuit.
Check IC701 and associated
circuit.
Is the setting of
the BRIGHT center
and CONTRAST max?
BRIGHT is adjusted to center,
CONTRAST is adjusted to max.

24
AV-20FD22
TROUBLESHOOTING GUIDE
NO COLOR
Adjust the COLOR setting.
YES
Is the receiving of
the color signal?
NO
YES
NO
YES
NO
Is the setting of the
COLOR central?
Receive the color signal.
Is the waveform at
pin42 of IC601
normal? Check X601 associated circuit.
Check IC601 and associated
circuit

25
AV-20FD22
TROUBLESHOOTING GUIDE
NO VERTICAL
YES
NO
YES
NO
YES
NO
Check R449 and Q401.
Check FB401 and associated
circuit.
Check IC601 associated
circuit.
Is the normal signal
output to 34PIN of
IC601?
Check IC601 associated
circuit.
Is the normal signal
input in the base of
Q405?
Is the normal signal
output to 9PIN of
FB401?

26
AV-20FD22
TROUBLESHOOTING GUIDE
NO OSD
YES
NO
YES
NO
Check the pin25 of IC101 and
IC601 associatedcircuit.
Is there the waveform
of 22,23 and also
24PIN of IC101?
Check IC601 associated
circuit.
Is there the waveform
of 20,21 and also
22PIN of IC601?
Check IC601 associated
circuit.

27
AV-20FD22
TROUBLESHOOTING GUIDE
Yes
No
CHECK DISPLAY DVD
OSD.
DVD DECK NO OPEN/CLOSE
CHECK
CONNECTION
CD811.
No CHECK CABLE CD811.
Yes
CHECK MAIN PCB
(P.CON 5V,PCON. 9V,P.CON 5V_D).
Yes
No
Yes
No
REFER TO "INSTABILITY DVD
MODE".
DVD MODE STABILITY.
CHANGE DVD DECK.
CHANGE DVD DECK.
(DVD SECTION)
POSSIBLE TO OPEN/CLOSE
BY MECHANIC.

28
AV-20FD22
TROUBLESHOOTING GUIDE
Yes
DVD NO PICTURE
No
Yes
No
Yes
No
Yes CHANGE IC8501.
CHECK CONNECTION
CD4002.
CHECK OSILLATION
OF X1001.
CHANGE DVD DECK.
No
CONNECTION TRY
AGAIN CD4002.
CHANGE X1001.
CHANGE IC4001.
CHECK OUTPUT SIGNAL
IC8501 49,50PIN?
CHECK DVD DECK
CONNECTOR
BEND OR SHORT?

29
AV-20FD22
TROUBLESHOOTING GUIDE
DVD NO PLAY
Yes
No
CHECK
CONNECTION
CD4001.
Yes
No
CONNECTION TRY AGAIN
CD4001.
No
WHEN PLAY,CHECK THE
DECK MOTOR TUCH. No CHANGE DVD DECK.
Yes
Yes
No
CHECK OUTPUT SIGNAL
IC8501 8,10,13PIN?
REFER TO"DVD NO PICTURE".
CHECK THE CIRCUIT
AROUND IC701.
AFTER READING,CHECK
"INCORRECT DISC"DISPLAY.
CHECK DVD DECK
CONNECTOR BEND OR
SHORT?

30
AV-20FD22
TROUBLESHOOTING GUIDE
INSTABILITY DVD MODE
No
Yes
CONNECTION TRY AGAIN CD4002.
CHECK CONNECTION
CD4002.
No
Yes
CHANGE DVD DECK.
No
Yes
CONNECTION TRY AGAIN
CP8002,CP8003.
CHECK CONNECTION
CP8002,CP8003.
CHANGE DVD DECK.
CHECK DVD DECK
CONNECTOR BAND OR SHORT?

31
AV-20FD22
TROUBLESHOOTING GUIDE
CD NO PLAY
Yes
No
WHEN READING,
CHECK THE DECK
MOTOR TURN. CHANGE DVD DECK.
Yes
No
Yes
No CHECK CONNECTION CP4002
& AROUND THE CIRCUIT.
CHECK INPUT SIGNAL
IC4001 3,5,6PIN?
CHANGE DVD DECK.
CHANGE IC4001.
CHECK DVD DECK
CONNECTOR BEND OR SHORT?