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11
XVM-F65
5-6. INVERTER HIGH VOLTAGE CHECK
Condition: DIMMER switch OFF
5-6-1. Voltage Check
Checking Method:
1) Connect oscilloscope between TP809 (+) and TP804 (–) using
Checking Method:
1) Connect oscilloscope between TP809 (+) and TP804 (–) using
high voltage proof probes (100:1).
2) Verify that the reading on the oscilloscope is at 2.4
± 0.15 Vpp.
Checking location: Monitor board
5-6-2. Frequency Check
Checking Method:
1) Connect oscilloscope between TP809 (+) and TP804 (–) using
Checking Method:
1) Connect oscilloscope between TP809 (+) and TP804 (–) using
high voltage proof probes.
2) Verify that the reading on the oscilloscope is at 50
± 2.5 kHz.
Checking location: Monitor board
5-7. OSD DOT CLOCK CHECK
1. Dot Clock Check
Checking Method:
1) Connect frequency counter between TP555 (+) and TP554 (–).
2) Verify that the reading on the counter is at 6.5
Checking Method:
1) Connect frequency counter between TP555 (+) and TP554 (–).
2) Verify that the reading on the counter is at 6.5
± 0.2 MHz.
Checking location: Monitor board
5-8. NTSC SUBCARRIER CHECK.
1. Subcarrier Check
Checking Method:
1) Press the INPUT key on the remote controller and enter the
Checking Method:
1) Press the INPUT key on the remote controller and enter the
NTSC mode using the
R
and
r
keys.
2) Connect frequency counter between TP503 (+) and TP504 (–).
3) Verify that the reading on the counter is at 3.579545 MHz
3) Verify that the reading on the counter is at 3.579545 MHz
± 100
Hz.
Checking location: Monitor board
5-9. PAL SUBCARRIER CHECK
1. Subcarrier Check
Checking Method:
1) Press the INPUT key on the remote controller and enter the
Checking Method:
1) Press the INPUT key on the remote controller and enter the
PAL mode using the
R
and
r
keys.
2) Connect frequency counter between TP503 (+) and TP504 (–).
3) Verify that the reading on the counter is at 4.433619 MHz
3) Verify that the reading on the counter is at 4.433619 MHz
± 100
Hz.
Checking location: Monitor board
5-10. F0 FREQUENCY ADJUSTMENT
5-10-1. 3.2/3.8MHz (CH2) Adjustment
Adjustment Method:
LCH (3.2 MHz)
1) TP356 is connected to GND.
2) Connect frequency counter between TP354 (+) and TP353 (–).
3) Adjust RV352 so that the reading on the counter stands at the
Adjustment Method:
LCH (3.2 MHz)
1) TP356 is connected to GND.
2) Connect frequency counter between TP354 (+) and TP353 (–).
3) Adjust RV352 so that the reading on the counter stands at the
specified value.
Specified value: 3.2 MHz
± 3 kHz
RCH (3.8 MHz)
4) Connect frequency counter between TP352 (+) and TP353 (–).
5) Adjust RV351 so that the reading on the counter stands at the
4) Connect frequency counter between TP352 (+) and TP353 (–).
5) Adjust RV351 so that the reading on the counter stands at the
specified value.
Specified value: 3.8 MHz
± 3 kHz
Adjustment location: Monitor board
5-10-2. 2.3/2.8MHz (CH1) Check
Checking Method:
LCH (2.3MHz)
1) TP365 is made open.
2) Connect frequency counter between TP354 (+) and TP353 (–).
3) Verify that the reading on the counter is at 2.3 MHz
Checking Method:
LCH (2.3MHz)
1) TP365 is made open.
2) Connect frequency counter between TP354 (+) and TP353 (–).
3) Verify that the reading on the counter is at 2.3 MHz
± 30 kHz.
RCH (2.8MHz)
4) Connect frequency counter between TP352 (+) and TP353 (–).
5) Verify that the reading on the counter is at 2.8 MHz
4) Connect frequency counter between TP352 (+) and TP353 (–).
5) Verify that the reading on the counter is at 2.8 MHz
± 30 kHz.
Checking location: Monitor board
5-11. V COM VOLTAGE/POSITION ADJUSTMENT
Condition: TEST MODE (See 9 page)
1. Voltage Setup Adjustment
Adjustment method:
1) Select Com Gain from the FOR FACTORY MODE.
2) Connect oscilloscope between TP724 (+) and TP710 (–).
3) Adjust so that the p-p value A of the waveform stands at the
Adjustment method:
1) Select Com Gain from the FOR FACTORY MODE.
2) Connect oscilloscope between TP724 (+) and TP710 (–).
3) Adjust so that the p-p value A of the waveform stands at the
specified value using the
R
and
r
keys on the remote controller.
4) Adjust so that the level B on the negative side stands at the speci-
fied value using RV652.
5) Verify that the level C on the positive side stands at the specified
value.
Specified value A: 6.8
± 0.1 Vp-p
Specified value B: –2.1
± 0.1 V
Specified value C: 4.6
± 0.1 V
Adjusting location: Monitor board
C
B
0V
A
Ver. 1.1
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