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
±10% G = ±2% F = ±1%
K =
2. CAPACITOR Unless otherwise noted in schematic, all capacitor values less than 1 are expressed in
the values more than 1 in pF.
All capacitors are ceramic 50V, unless otherwise noted as the following marks.
Electolytic capacito
Mylar capacitor
µ
F, and
3. The parts indicated with "
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
SCHEMATIC DIAGRAM STRUCTURE:
– MAIN Circuit TUNER [ SHEET– 1/9 ] ........................1/11
– CRT DRIVE Circuit ........................................................................................................................ 10/11
– FRONT AV Circuit.......................................................................................................................... 11/11
" have special characteristics, and should be replaced with identical parts only.
±20% except H.V.
– 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
– 44 –
L
R
CRT
H.V.
AUDIO AMP
Q610
HEAD PHONE
C
V901
R/G/BR/G/B
VIDEO DRIVE
Q901,Q903,Q905
H
V
F.B.T.
D.Y.
C BUS CONTROL BLOCK
2
*I
V_DY_Y
V_DY_G
EN
V. DRIVE
Q301
H. DRIVE
Q402-Q404
Q460-Q463,Q465
SPECIFIC INFORMATIONS
H OUT
V OUT
B
R
G
POWER ON/OFF
CIRCUIT BLOCK DIAGRAM
SP_L/W/R
AUDIO_L/R
U903
*
H001
*
TV_VIDEO
TV_L/R
IF
TUNER
SV
QV01
V
(1)
AV SW
*
L
AV IN
VIDEO
R
RESET
Q841,Q842
MICROPROCESSOR
VIDEO
CHROMA
DEF
COMB
*
QA51
C BUS
2
I
C
VIDEO
L
R
V
(2)
AV IN
(3)
V
L
R
AV IN
(FRONT)
L
V
R
OUTPUT
MONITOR
TEXT
SDA
SCL
MEMORY
*
QA10
PR/CR
PB/CB
VIDEO INPUT
COMPONENT
+B VOLTAGE
T862
Q801
~
D801
– +
Q826
CONVERTER TRANS.
HYBRID
~
– 45 –
4.5V 4.5V 5.0V 3 2.0V
25CSZ5TR/25SZ5ST/25SZ5VX
MAIN (TUNER)
SHEET-1/9
(1/11)
0V
0V
2.0Vp-p
3.8V
3.8V
4.0V
4.5V
4.0V
3.8V
9.0V
3.8V
9.0V
5.2V
4.0V
5.2V
0V
3.5V
3.3V
3.3V
3.3V
4.0V
4.0V
5.2V
5.2V
5.2V
5.2V
5.2V
5.2V
5.2V
5.2V
5.2V
5.2V
5.2V
0V
0V
4.0V
4.5V
9.0V
3.4V
9.0V
4.0V
3.4V
0V
9.0V
3.9V
0V
0V
0V
0V
0V
25CSZ5TR/25SZ5ST/25SZ5VX
MAIN (AV SW)
SHEET-2/9
(2/11)
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