ELECTRICAL ADJUSTMENT INSTRUCTIONS

General Note:

"CBA" is abbreviation for "Circuit Board Assem- bly."

NOTE:

Electrical adjustments are required after replacing circuit components and certain mechanical parts. It is important to perform these adjustments only after all repairs and replacements have been com- pleted.

Also, do not attempt these adjustments unless the proper equipment is available.

Test Equipment Required

1.NTSC Pattern Generator (Color Bar W/White Window, Red Color, Dot Pattern, Gray Scale, Monoscope, Multi-Burst)

2.DC Voltmeter

3.Oscilloscope: Dual-trace with 10:1 probe, V-Range:0.001~50V/Div,

F-Range: DC~AC-60MHz

4.Plastic Tip Driver

5.Remote control unit: Part No. N0138UD or N0139UD

6.DC power supply 13.2V/5A

How to make Service remote control unit:

1.Prepare normal remote control unit. (Part No. N0138UD or N0139UD) Remove 3 Screws from the back lid. (Fig. 1-1)

2.Added J1 (Jumper Wire) to the remote control CBA. (Fig. 1-2)

SCREWS

How to set up the service mode:

Service mode:

1.Use the service remote control unit.

2.Turn the power on. (Use main power on the TV unit.)

3.Press "SLEEP" button on the service remote con- trol unit. Version of micro computer will display on the CRT. (Ex: 054-0.05)

4.Check the display on the lower left is "3815" and if it is not "3815," set it at "3815" according to "2. Ini- tial Setting."

1.+B Adjustment

Purpose: To obtain correct operation.

Symptom of Misadjustment: The picture is dark and the unit does not operate correctly.

Test Point

Adj. Point

Mode

 

Input

 

 

 

 

 

 

 

 

 

 

TP601(+B)

VR661

---

 

---

TP300(GND)

 

 

 

 

 

 

 

 

 

 

Tape

M. EQ.

 

Spec.

 

 

 

---

DC Voltmeter

+132±0.5V DC.

 

 

 

 

 

Note:TP601, TP300(GND), VR661 --- Main CBA

1.Connect DC Volt Meter to TP601 and TP300(GND).

2.Adjust VR661 so that the voltage of TP601 becomes +132±0.5V DC.

REMOTE CONTROL UNIT

Fig. 1-1

 

 

 

 

 

J 1

 

 

 

Fig. 1-2

 

REMOTE CONTROL CBA

 

 

 

 

 

Notes:

1.The service remote control unit that be made in above method is usable in the electrical adjustment of the following models.

SRT2313/2319, SRT2213B/2219B, SRT2227X, SRT2223X, SRT2223B, SRT2232X, SRT2220P SRT4127P

2.The attached remote control unit can not be used as service remote control unit.

5-1

L6650EA

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Sylvania SRT2232X Electrical Adjustment Instructions, Test Equipment Required, How to set up the service mode

SRT2232X specifications

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