Toshiba 25CSZ5TR, 25SZ5ST, 25SZ5VX Schematic

SCHEMATIC DIAGRAM

MODEL : 25CSZ5TR/25SZ5ST/25SZ5VX

WARNING: BEFORE SERVICING THIS CHASSIS, READ THE "X-RAY RADIATION PRECAUTION", "SAFETY PRECAUTION" AND "PRODUCT SAFETY NOTICE" ON THE MANUAL FOR THIS MODEL.

CAUTION: The international hazard symbols "" in the schematic diagram and the parts list designate components which have special characteristics important for safety and should be replaced only with types identical to those in the original circuit or specified in the parts list. The mounting position of replacements is to be identical with originals.

Before replacing any of these components, read carefully the PRODUCT SAFETY NOTICE on the MANUAL for this model. Do not degrade the safety of the receiver through improper servicing.

NOTE:
1. RESISTOR	Resistance is shown in ohm [K = 1.000, M = 1.000.000]. All resistors are 1/6W and 5% tolerance
	carbon resistor, unless otherwise noted as the following marks.
	1/2R = Metal or Metal oxide of 1/2 watt										1/2S = Carbon compsistion of 1/2 watt
	1RF = Fuse resistor of 1 watt										10W = Cement of 10 watt
	K = ±10% G = ±2% F = ±1%
2. CAPACITOR	Unless otherwise noted in schematic, all capacitor values less than 1 are expressed in µF, and
	the values more than 1 in pF.
	All capacitors are ceramic 50V, unless otherwise noted as the following marks.
					Electolytic capacito						Mylar capacitor

3.The parts indicated with "" have special characteristics, and should be replaced with identical parts only.

4.Voltages read with DIGITAL MULTI-METER from point indicated to chassing ground, using a color bar signal with all controls at normal, line voltage at 220 volts.

5.Waveforms are taken receiving color bar signal with enough sensitivity.

6.Voltage reading shown are nominal values and may vary ±20% except H.V.

	SCHEMATIC DIAGRAM STRUCTURE:
		–	MAIN Circuit			TUNER	[ SHEET– 1/9 ]	........................ 1/11
					–
						AV SW	[ SHEET– 2/9 ] ........................	2/11
					–	VERT	[ SHEET– 3/9 ] ........................	3/11
					–	HDEF	[ SHEET– 4/9 ] ........................	4/11
					–	VCD/MICON	[ SHEET– 5/9 ] ........................	5/11
					– A-PRO/AUDIO-AMP		[ SHEET– 6/9 ] ........................	6/11
					–	PROTECTOR	[ SHEET– 7/9 ] ........................	7/11
					–	POWER	[ SHEET– 8/9 ] ........................	8/11
		–			–	LOW B REG	[ SHEET– 9/9 ] ........................	9/11
			CRT DRIVE Circuit ........................................................................................................................					10/11
		–	FRONT AV Circuit ..........................................................................................................................					11/11

– 44 –

– 45 –

CIRCUIT BLOCK DIAGRAM

U903

	H001	*
*
	TUNER	IF

SV

SP_L/W/R

Q610

L

AUDIO AMP

R

AUDIO_L/R

TV_L/R

TV_VIDEO

(1)		QV01	HEAD PHONE
	V	* AV SW
AV IN
	L
	R	VIDEO	C
(2)	V		Q901,Q903,Q905	V901
AV IN	L
	R		R/G/B VIDEO DRIVE R/G/B
				CRT

(3)	V
AV IN	L	V	H
(FRONT) R		D.Y.
	QA51

	V		I 2 C BUS	*	R
	L				G
MONITOROUTPUT			VIDEO		B
	R
				MICROPROCESSOR			Q301
			C	VIDEO
				CHROMA		V OUT	V_DY_Y
COMPONENT	PB/CB						V. DRIVE V_DY_G
				DEF
VIDEO INPUT	PR/CR					H OUT
		QA10		COMB
			SDA	TEXT			Q402-Q404
		*MEMORY
			SCL				H. DRIVE	H.V.
		D801	T862	+B VOLTAGE			Q460-Q463,Q465
		~					EN	F.B.T.
	–	+
		Q801
		~
		HYBRID
		CONVERTER TRANS. Q841,Q842
				RESET		POWER ON/OFF
			Q826				* I2C BUS CONTROL BLOCK

SPECIFIC INFORMATIONS

4.5V

4.5V

5.0V

32.0V

25CSZ5TR/25SZ5ST/25SZ5VX MAIN (TUNER)

SHEET-1/9

(1/11)

				0V
				0V
2.0Vp-p	3.8V		4.0V
			4.0V
	3.8V		5.2V
	4.0V		5.2V
	4.5V		5.2V
	4.0V		5.2V
	3.8V		5.2V
	9.0V		5.2V
	3.8V		5.2V
		9.0V	5.2V
		5.2V
		4.0V	5.2V
		5.2V	5.2V
	0V		5.2V	4.5V
			0V		9.0V
			9.0V		3.9V
			4.0V
			0V
			3.4V
	3.5V
	3.3V			9.0V
			4.0V
	3.3V			3.4V
	3.3V
				0V
				0V
				0V	0V
				0V
					0V

25CSZ5TR/25SZ5ST/25SZ5VX MAIN (AV SW)

SHEET-2/9

(2/11)