Toshiba 28ZH46P, 32ZH46P Schematic

FILE NO. 030-200405

SERVICE MANUAL

Colour Television

28ZH46P
32ZH46P

Published in Japan, Jun. 2004 (YC)

SCHEMATIC DIAGRAM

MODEL : 28ZH46P / 32ZH46P

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
?F, and the values more than 1 in pF.
All capacitors are ceramic 50V, unless otherwise noted as the following marks.

Electolytic capacitor 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 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:

SIGNAL Circuit (SCART / VIDEO FRONT END)

(AUDIO PROCESSING AND MUTING)
(PROCESSOR AND MEMORY)
(VIDEO BACK-END PROCESSING)
(POWER SUPPLY AND REGULATION)

POWER / DEFLECTION Circuit

INDICATOR / CONT / AV Circuit
CRT-D Circuit

...............................................................................................................................................................

(VERTICAL & HORIZONTAL DEFLECTION STAGE)
(POWER STAGE)

................................................................................................................................

[ SHEET - 1/5 ]...... 1/9

[ SHEET - 2/5 ]...... 2/9

[ SHEET - 3/5 ]...... 3/9

[ SHEET - 4/5 ]
[ SHEET - 4/5 ]

[ SHEET - 1/2 ]...... 6/9

[ SHEET - 2/2 ]...... 7/9

......

......

4/9
5/9

8/9
9/9

AFT

SIF

FM/AM mono

E1 Audio I/P

E1 Audio O/P

E2 Audio I/P

E2 Audio O/P

E3 Audio I/P

CIRCUIT BLOCK DIA

Audio L/R

Q601

MSP3410G

IIC

GRAM

Q670

TA8211AH

HEADPHONE

RGB

AV3

AV1

AV2

"RF" Video

RGB

E1 Video I/P

E1 Video O/P

E2 (Y) Input

E2 (C) Input

E2 Video O/P

E3 Video I/P

E1 #16 Detect

VSP Reset

MSP Reset

Q501

VSP9402A

E1 #8 Detect

E2 #8 Detect

H Sync / V Sync

IIC

AFT

IIC

QA01

SDA5555

/A075

Y/U/V

VSP Blk

OSDRGB

IIC

Q510

TA1316AN

QA02

AT24C64A

Hout

Vout

IIC

Horizontal

Drive

Q302

TA1317AN

Q301

LA7846N

2.85 4.97 2.63 32.75 2.63 0.00 0.00 2.63 5.17 1.77 2.85 1.57 2.40

1 2

3 2 1 4

1 2 3 4

2.40

1.78

0.00

9

3.28

3.29

1.7 2

1.6 7

40

41

1.67

42

43

3.20

44

45

46

47

48

49

1.67

50

51

52

53

54

55

56

57

58

3.20

59

60

33343536373839

1.72

28

29

232425

26

19

17

14

13

3.29

12

11

8

0.00

7

3.20

6

5

1.72

4

3

2

3.20

1

8

7

6

5

8.49

7.84

4.36

7.85

2.89

2.29

8.50

7.85

4.32

7.85

2.88

2.27

61626364656667686970717273747576777879

1.67

1.72

1.67

0.26

0.81

3.29

3.20

10

11

12 13

80

3.20

5 6 7 8 9 10 11 12 13

28ZH46P/32ZH46P
SIGNAL
(SCART/VIDEO FRONT END)
SHEET-1/5

(1/9)