Panasonic TC-20B10P service manual Electrical Inspection

Service Adjustments and Calibrations TC-14B10P / TC-20B10P

1.2- Press “5” at the remote control to make appear a white line for screen calibration. In order to make tHe line disappear press “5” again.

DAC DIRECT TABLE

CHQ1	CHQ2	CHQ3	CHQ4	CHQ5
OP1	SUB-COR	HC	AFT	B-CUT
OP2	COR	VC	VID	G-CUT
OP3	SUB-NITIDEZ	V ALT	RF	R-CUT
OP4	NITIDEZ	---	---	B-DR
OP5	SUB-CONTRAST	---	---	R-DR
OP6	CONTRAST	---	---	SUB BR
---	SUB-BRIGHT	---	---	BRIGHT
---	BRIGHT	---	---	---
---	SUB-MATIZ	---	---	---
---	MATIZ	---	---	---

ELECTRICAL INSPECTION

1- EQUIPMENTS REQUIRED

1.1- High voltage meter, range to 30kv (eletrostatic or resistive)

1.2- Voltmeter, range 30VDC, 150 VDC and 300VAC

1.3- Voltmeter RMS

1.4- DY,CY,CRT

2- PREPARATION

2.1- Position controls on the following positions: NORMAL IMAGE……....…ADJUSTED

VOLUME………..........…… MINIMUM

TV/VIDEO……............…… TV

POT SCREEN…................CENTER

POT FOCUS…...........……BEST POINT ( VISUAL)

ENGLISH

MEMORY - DIRECT ACCESS METHOD

1.1- To obtain direct access to memory go to item CHQ1, press simultaneously VOL(_) at the TV set and “mute” at the remote control.

1.2- To alternate between memory positions press “3”or “4”. 1.3- To change the contents of each memory positions press VOL(+) or VOL(_), the letter will remain red. To memorize the changes press “0”, the letter will go

back to white.

1.4- To exit memory press “1” or “2” to alternate between the CHQ’s or press “N” to exit “SERVICE MODE” .

DATA MEMORY ON THE SCREEN

EEPROM MEMORY MAP

3- VOLTAGE INSPECTION

3.1- Adjust AC input voltage to 110V.

3.2- Turn on the S801 switch.

3.3- Apply a CROSS HATCH pattern.

3.4- Adjust controls “SUB BRIGHT” ( SUB BR) in CHQ5 and SCREEN to obtain corrente de feixe zero.

3.5- Verify the voltage on the points below:

VOLTAGE	TEST POINT	METER
90V ± 2,0V	C823 (+)	300V
190V ± 15V	E33 - PIN 1	300V
22V ± 2,0V	D850 (K)	30V
44V ± 2,5V	D852 (K)	50V
9V ± 1V	TPE9	30V
5V ± 1V	TPE10	30V
6,3 VRMS ± 0,24V	Y33 - PIN 4	30VRMS
	For 14” models only
180V ± 15V	E33 - PINO 1	300V

3.6- Position SCREEN and SUB BRIGHT ( SUB BR) to a level where image is visible.

INSPECTION OF THE DEFLECTION CIRCUITS AND PRE-ADJUSTMENTS

1- REQUIRED EQUIPMENTS.

1.1- High voltage meter, range up to 30Kv (eletrostatic or resitor).

2- PROCEDURES.

2.1- Apply a PHILIPS pattern.

2.2- Select VERTICAL HEIGHT (V ALT) in CHQ3.

2.3- Adjust the heigth to obtain a correct image.

2.4- Apply a CROSS HATCH pattern.

2.5- Adjust BRIGHT, SUB BR, in CHQ5, SCREEN minimum to obtain current=0

2.6- Measure high voltage with the voltmeter and verify if is within the limits below:

METER	20 INCHES	14 INCHES
ELETROSTÁTICO	26,5 + 1,0 _ 1,5KV	24,5 + 1,0 _ 1,5KV
RESISTIVO	26,0 + 1,0 _ 1,5KV	24,0 + 1,0 _ 1,5KV

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