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Model
ICF-CD555TV
Pages
74
Size
4.05 MB
Type
PDF
Document
Service Manual
Brand
Device
Audio
File
icf-cd555tv.pdf
Date
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17
ICF-CD555TV
5-3-2.  POSITION  SET  UP  ADJUSTMENT
Check the B level of the waveform on the oscilloscope is 4.2 
±
0.1 Vp-p and adjust the RV1551 so that the C level of the waveform
on the oscilloscope is –2.4 
±
 0.1 Vp-p.
5-4.
INVERTER  HIGH  VOLTAGE  CHECK
Connection:
Checking Procedure:
Connect an oscilloscope to the TP1805 and TP1806 on the TV
board.
5-4-1. HIGH  VOLTAGE  CHECK
Check that the reading of oscilloscope is 550 
±
 150 V (rms).
5-4-2. FREQUENCY  CHECK
Check that the reading of oscilloscope is 70 
±
 3 kHz.
5-5.
OSD  DOT  CLOCK  CHECK
Connection:
Adjusting Procedure:
1. Connect an frequency counter to the TP1554 on the TV board.
2. Check that the reading of frequency counter is 6.5 
±
 0.2 MHz.
5-6.
NTSC  SUB  CARRIER  CHECK
Connection:
Checking Procedure:
1. Connect an frequency counter to the TP1508 on the TV board.
2. Check that the reading of frequency counter is 3.579545 
±
0.0001 MHz.
5-7.
VIDEO  BUS  ADJUSTMENT
Connection: (5-7-1 to 5-7-9)
Condition: (5-7-1 to 5-7-9)
Input the NTSC video signal (10 step (no burst)) (1 Vp-p 75 
Ω
)  to
the INPUT VIDEO jack (JK301) on the MAIN board from NTSC
pattern generator.
Adjusting Procedure:
1. Set the TV test mode (Refer to TV TEST MODE (See page
12).
2. Press the 
[TV MENU]
 key to select “LOAD DEFAULT”, and
press the 
[ENTER]
 key to write initial values to the EEPROM.
Note:
It carries out, only when EEPROM (IC1451) is exchanged.
3. Press the 
[TV MENU]
 key to select “FOR FACTORY”, and
press the 
[ENTER]
 key to enter the adjustment mode.
4. If entering the adjustment mode, press the 
[TV MENU]
 key to
select item, and press the 
[ENTER]
  key to execute all
adjustment items mentioned below.
5-7-1. GAMMA  1  ADJUSTMENT
Adjusting Procedure:
1. Connect an oscilloscope to the TP1959 on the TV board.
2. Adjust the
.
/
>
keys so that the H level of the wave-
form on the oscilloscope is 2.1 
±
 0.1 Vp-p.
5-7-2. GAMMA  2  ADJUSTMENT
Adjusting Procedure:
1. Connect an oscilloscope to the TP1959 on the TV board.
2. Adjust the
.
/
>
keys so that the J level of the wave-
form on the oscilloscope is 3.0 
±
 0.1 Vp-p.
B
0V
C
+
–
TP1806
TP1805
set
osclloscope
(high resistance probe)
+
–
TP1403 (GND)
TP1554
set
frequency counter
(high impedance probe)
+
–
TP1403 (GND)
TP1508
set
frequency counter
(high impedance probe)
+
–
NTSC pattern
generator
TP1403 (GND)
TP1958 or
TP1959 or
TP1960
set
osclloscope
INPUT VIDEO jack
(JK301)
H
0V
J
0V
18
ICF-CD555TV
5-7-7. B-SUB  BRT (B-CH  SUB  BRIGHT)  ADJUSTMENT
Adjusting Procedure:
1. Connect an oscilloscope of 1 step voltage to the TP1960 on
the TV board.
2. Adjust the
.
/
>
keys so that the G level of the wave-
form on the oscilloscope is 1.0 
± 0.1 Vp-p.
5-7-8. R-SUB  CONT (R-CH  SUB  CONTRAST)
ADJUSTMENT
Adjusting Procedure:
1. Connect an oscilloscope of 10 step voltage to the TP1958 on
the TV board.
2. Adjust the
.
/
>
keys so that the D level of the wave-
form on the oscilloscope is 3.25 
± 0.1 Vp-p.
5-7-9. B-SUB  CONT (B-CH  SUB  CONTRAST)
ADJUSTMENT
Adjusting Procedure:
1. Connect an oscilloscope of 10 step voltage to the TP1960 on
the TV board.
2. Adjust the
.
/
>
keys so that the D level of the wave-
form on the oscilloscope is 3.25 
± 0.1 Vp-p.
5-7-3. Y  GAIN (LUMINANCE  SIGNAL  CONTRAST
LEVEL)  ADJUSTMENT
Adjusting Procedure:
1. Connect an oscilloscope to the TP1959 on the TV board.
2. Adjust the
.
/
>
keys so that the D level of the wave-
form on the oscilloscope is 3.25 
± 0.1 Vp-p.
5-7-4. BLACK  LIMIT (BLACK  LIMITER  LEVEL)
ADJUSTMENT
Adjusting Procedure:
1. Connect an oscilloscope to the TP1959 on the TV board.
2. Adjust the
.
/
>
keys so that the E level of the wave-
form on the oscilloscope is 1.0 
± 0.1 Vp-p.
5-7-5. WHITE  LIMIT (WHITE  LIMITER  LEVEL)
ADJUSTMENT
Adjusting Procedure:
1. Connect an oscilloscope to the TP1959 on the TV board.
2. Adjust the
.
/
>
keys so that the F level of the wave-
form on the oscilloscope is 3.9 
± 0.05 Vp-p.
5-7-6. R-SUB  BRT (R-CH  SUB  BRIGHT)  ADJUSTMENT
Adjusting Procedure:
1. Connect an oscilloscope of 1 step voltage to the TP1958 on
the TV board.
2. Adjust the
.
/
>
keys so that the G level of the wave-
form on the oscilloscope is 1.0 
± 0.1 Vp-p.
G
0V
G
0V
D
0V
D
0V
F
0V
D
0V
D
0V
19
ICF-CD555TV
Connection: (5-7-10 to 5-7-12)
5-7-10. VCO  FREE  RUN  ADJUSTMENT
Condition:
Input the NTSC video signal (10 step (no burst)) (1 Vp-p 75 
Ω)  to
the INPUT VIDEO jack (JK301) on the MAIN board from NTSC
pattern generator.
Adjusting Procedure:
Adjust the
.
/
>
keys so that a screen on the monitor may
become normal.
5-7-11. PLL/V  POS  ADJUSTMENT
Condition:
Input the NTSC video signal (monoscope) (1 Vp-p 75 
Ω) to the
INPUT VIDEO jack (JK301) on the MAIN board from NTSC
pattern generator.
Adjusting Procedure:
Press the
.
/
>
keys to adjust so that the position of screen
on the monitor becomes vertically symmetric.
5-7-12. H  POS  ADJUSTMENT
Condition:
Input the NTSC video signal (monoscope) (1 Vp-p 75 
Ω) to the
INPUT VIDEO jack (JK301) on the MAIN board from NTSC
pattern generator.
Adjusting Procedure:
Press the
.
/
>
keys to adjust so that the position of screen
on the monitor becomes horizontally symmetric.
NTSC pattern
generator
set
INPUT VIDEO jack
(JK301)
20
ICF-CD555TV
– TV BOARD (Component Side) –
TP1805
TP1806
RV1551
V COM Adjustment
RV1651
PLL Adjustment
Connecting and Adjustment Location:
– TV BOARD (Conductor Side) –
TP1508
TP1554
TP1955
TP1651
TP1904
TP1907
TP1411
TP1912
TP1911
TP1403
TP1401
TP1959
TP1958
TP1960
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