Toshiba 28Z33B, 32Z33B SCHEMATIC DIAGRAM
SCHEMATIC DIAGRAM
MODEL : 28Z33B/32Z33B
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:
– SIGNAL Circuit MICON [ SHEET– 1/4 ] .......................... 1/7
– POWER/DEF/CRT D Circuit POWER/DEFLECTION [ SHEET– 1/2 ] .......................... 5/7
– POWER/DEF/CRT D Circuit – CRT D [ SHEET– 2/2 ] .......................... 6/7
– INDICATOR/BUTTON/AV Circuit ....................................................................................................... 7/7
" have special characteristics, and should be replaced with identical parts only.
±20% except H.V.
– VCD/IF/V OUT [ SHEET– 2/4 ] .......................... 2/7
– AV/AUDIO [ SHEET– 3/4 ] .......................... 3/7
– AC IN [ SHEET– 4/4 ] .......................... 4/7
– 35 –
L
R
T461
H.V.
F.B.T.
C BUS CONTROL
2
*I
Q610
AUDIO OUT
V901
HEAD PHONE
CRT
H
V
D.Y.
SPECIFIC INFORMATIONS
CIRCUIT BLOCK DIAGRAM
SIF
H002
QV01
AV_L/8
L/R
Y
AV SW
*
TV-L/R
VIDEO OUT
Q901,Q903,Q905
IF
*
Q501
Y
C
TV_V
C
C BUS
2
RGB
IF
I
QA01
V. OUT
Q301
CHROMA
VIDEO
DEF.
PIF
SAW
FILTER
µ-CON
SIF
SAW
FILTER
Q404
H. OUT
+B VOLTAGE
T862
CONVERTER TRANS.
HYBRID
Q801
TUNER MA Module
**
H001
(1)
21PIN
(FULL)
(2)
21PIN
– 36 –
L
V
(3)
(FRONT)
QA02
MEMORY
*
~
~
–+
1.2V
1.1V
3.3V
3.3V
1.6V
0V
0V
0V
0V
0V
3.3V
0V
0V
0V
0V
4.4V
4.8V
0V
3.3V
0V
1.7 V
1.8V
0V
3.3V
4.9V
4.9V
4.4V
4.3V
5.0V
5.0V
0.6V
0V
5.0V
28Z33B/32Z33B
SIGNAL (MICON)
SHEET-1/4
(1/7)
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