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4. TV SETTING CHECK Settings check for different models/
Adjustment menu screen PAGEs 4-1~4
The settings are fixed for each model: Do not change the
settings to those other than specified.
• Check to see if the settings on the adjustment menu screen
are the same as in Table 4.
If the settings are different, use the volume keys on the jig
remote control to reset them.
3.58 TRAP 0: ON
BPF
2: AUTO
H AFC
1: +1
WPL
0: OFF
* The 3.58 TRAP setting cannot be modified.
Table 4
PAGE 4
1 358 TRAP
2 BPF CUTOFF
3 H AFC
4 WPL
Check is possible even with a list of menus.
(Inoperable)
0: ON
2: AUTO
1: +1
0: OFF
Fig. 4
Tuner Adjustment:
If adjustment element has been replaced as a result of repair, perform
the following adjustments, and then proceed with adjustment using
the adjustment menu screens.
If this adjustment is not complete, correct adjustment will not be
possible with adjustment menu screens.
Components which cause the circuit status to change after repair:
• VCO coil
• SIF coil
• TRAP coil
• SEPARATION VR
5-1. VCO ADJUSTMENT VCO (PIF) adjustment/Video carrier
frequency free-running adjustment
Input signal: RF-NTSC color bar:
Input level: 90 dBµV
BROADCAST CH/fc=45.75MHz
Mode: TUNER
Test points: Input: TP-102 IF (TU101 pin 11)
Output: TP-201 AFT (IC301 pin 44)
Adjustment point: L205/P-IF
Measuring instruments: Oscilloscope
1. Connect the oscilloscope to TP-201.
2. Supply a specified level RF signal to TP-102, and adjust
L205 so that the voltage at TP-201 is 2.8 ± 0.3 V DC.
5-2 SIF ADJUSTMENT Audio IF modulation adjustment
Input signal: AM/FM-SG RF OUT: 4.5MHz
MODE OFF
90 dBµV
With the smple adjustment method, receive an ordinary
broadcast signal with simple adjustment.
Mode: TUNER
Test points: Input/TP-202: IC301 pin 52
Output/TP-203: IC301 pin 54
Adjustment point: L201/S-IF
Measuring instruments: Oscilloscope
1. Connect the oscilloscope to TP-203.
2. Tune in TV channel 2.
3. Supply a specified signal to TP-202, and adjust L201 so
that the voltage at TP-203 is 4.5 ± 0.2 V DC.
4.5 V
37
Leader LCG-404 pattern generator
AM/FM signal generator
1.0 V
0.5 ms
Fig.5-1
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