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9

Note: Follow the disassembly procedure in the numerical order given.

2

 two screws

(+P 2 

×

 8)

7

 cabinet (rear) assy

3

 three claws

4

 two claws

1

 two screws

(+P 2 

×

 8)

5

 CN904

6

 CN252

3

 two screws

(+BTP 2 

×

 6)

6

 MONITOR board

4

 two screws

(+BTP 2 

×

 6)

1

 CN701

bracket (LCD)

2

 CN801

5

 

Remove the solder.

10

1

 two screws

(+BTP 2 

×

 6)

3

 precision screw

(+P 1.7 

×

 1.8)

2

 two screws

(+BTP 2 

×

 6)

4

 bracket (LCD)

5

 LCD1

11

Setting Method:
1. Turn on power to the connection box XA-125/126.
2. Press the [POWER] key on the set to turn on the set.
3. Press the [RESET] key while pressing the [INPUT] and [VOL--]

Keys on the set.  Then TEST MODE MENU appears.

Terminating Method:
Select the MENU No. 5, SOFT RESET using the [MENU] key on
the remote controller and determine the selection using the [INPUT]
key.

The FOR FACTORY Mode:
The FOR FACTORY mode can be used to perform 13 different
adjustment items with the remote controller.

1. Select the MENU No. 2, FOR FACTORY using the [MENU] key

on the remote controller and determine the selection using the
[INPUT] key.

2. The FOR FACTORY mode is now entered.  The following items

are selected in turn by pressing the [INPUT] key repeatedly.

Com Gain

Y Gain

Black Limt 

White Limt 

R SUB BRT 

B SUB BRT

R SUB CONT 

B SUB CONT 

Gamma1

Gamma2 

VCO Free Run

PLL/V Pos

H Pos

3. For each item selected, adjust so that the adjustment value is

within the specified value range using the   

R

   and   

r

   keys on the

remote controller.

4. After adjustment, press the [INPUT] key on the remote controller

to determine the adjustment value.  After that, it changes into the
following item.

5. After all necessary adjustments are completed, select EXIT

using the [MENU]  key on the remote controller and press the
[INPUT] key to display the MENU screen.  Then, select No.5,
SOFT RESET using the [MENU] key and determine the selection
using the [INPUT] key to terminate the TEST mode.

12

The following measuring equipment are used for these electrical
adjustments:
• Oscilloscope
• NTSC pattern generator
• Stabilized power supply
• Digital voltmeter
• Frequency counter

Unless otherwise specified, the equipment should be connected as
shown below.

The 10-step gray scale signal from the NTSC pattern generator is
used as an adjustment signal for V COM voltage/position adjustment
as well as VIDEO adjustment.

10-step gray scale signal (with burst), 1Vp-p, 75 

Ω

5-4-1. Frequency Adjustment
Adjustment Method:
1) Connect frequency counter between TP702 (+) and TP704 (–).
2) Adjust RV702 so that the reading on the counter stands at the

specified value.

Specified value: 243 

± 3 kHz

Adjustment location: Monitor board

5-4-2. 5V Voltage Adjustment
Adjustment Method:
1) Connect digital voltmeter between TP707 (+) and TP710 (–).
2) Adjust RV701 so that the reading on the voltmeter stands at the

specified value.

Specified value: 5.05 

± 0.03 V

Adjustment location: Monitor board

5-4-3. Other Voltage Checks
Checking Method:
1) Connect digital voltmeter between TP708 (+) (Vdd) and

TP710 (–).

2) Verify that the reading on the voltmeter is at 3.20 

± 0.2 V.

3) Connect digital voltmeter between TP706 (+) (Vgh) and

TP710 (–).

4) Verify that the reading on the voltmeter is at 7.3 

± 0.3 V.

5) Connect digital voltmeter between TP705 (+) (Vgh) and

TP710 (–).

6) Verify that the reading on the voltmeter is at 17.0 

± 1.5 V.

7) Connect digital voltmeter between TP709 (+) (Vss) and

TP710 (–).

8) Verify that the reading on the voltmeter is at –12.0 

± 1.5 V.

Checking location: Monitor board

1. Frequency Adjustment
Adjustment Method:
1) Connect digital voltmeter between TP651 (+) and TP652 (–).
2) Adjust RV651 so that the reading on the voltmeter stands at the

specified value.

Specified value: 2.2 

± 0.15 V

Adjustment location: Monitor board

VIDEO OUT

(75 Ω)

NTSC pattern

generator

MONITOR
board
TP501(+)
TP502(–)

monitor
XVM-F65WL

connection box
XA-125/126

stabilized
power supply
14.4 V

GND

P

ARK

BA

TT