Toshiba CN36V51, CZ36V61, CZ32V61, 36V61 Schematic

0 (0)

SAFETY PRECAUTIONS

SERVICE WARNING

Only qualified service technicians who are familiar with safety checks and guidelines should perform service work. Before replacing parts, disconnect power source to protect electrostatically sensitive parts. Do not attempt to modify any circuit unless so recommended by the manufacturer. When servicing the receiver, use an isolation transformer

between the line cord and power receptacle.

SERVICING THE HIGH VOLTAGE AND CRT

Use EXTREME CAUTION when servicing the high voltage circuits. To discharge static high voltage, connect a 10K ohms resistor in series with a test lead between the receiver ground and CRT anode lead. DO NOT lift the CRT by the neck. Always wear shatterproof goggles when handling

the CRT to protect eyes in case of implosion.

X-RAY RADIATION AND HIGH VOLTAGE LIMITS

Be aware of the instructions and procedures covering X-ray radiation. In solid-state receivers and monitors, the CRT is the only potential source of X-rays. Keep an accurate high voltage meter available at all times. Check meter calibration periodically. Whenever servicing a receiver, check the high voltage at various brightness levels to be sure it is regulating properly. Keep high voltage at rated value, NO HIGHER. Excessive high voltage may cause X-ray radiation or failure of associated components. DO NOT depend on protection circuits to keep voltage at rated value. When troubleshooting a receiver with excessive high voltage, avoid close contact with the CRT. DO NOT operate the receiver longer than necessary. To locate the cause of excessive high voltage, use a variable AC transformer to regulate voltage. In present receivers, many electrical and mechanical components have safety related characteristics which are not detectable by visual inspection. Such components are identified by a

# on both the schematic and the parts list. For SAFETY, use only

equivalent replacement parts when replacing these components.

GENERAL GUIDELINES

Perform a final SAFETY CHECK before returning receiver to customer. Check repaired area for poorly soldered connections, and check entire circuit board for solder splashes. Check board wiring for pinched wires or wires contacting any high wattage resistors. Check that all control knobs, shields, covers, grounds, and mounting hardware have been replaced. Be sure to replace all insulators and restore proper lead dress.

SAFETY CHECKS — FIRE AND SHOCK HAZARD

Cold Leakage Checks for Receivers with Isolated Ground

Unplug the AC cord, connect a jumper across the plug prongs, and turn the power switch on (if applicable). Use an ohmmeter to measure the resistance between the jumped AC plug and any exposed metal cabinet parts such as antenna screw heads, control shafts, or handle brackets. Exposed metal parts with a return path should measure between 1M

ohms and 5.2M ohms. Parts without a return path must measure infinity.

Hot Leakage Current Check

Plug the AC cord directly into an AC outlet. DO NOT use an isolation transformer. Use a 1500 ohms, 10W resistor in parallel with a .15µF capacitor to connect between any exposed metal parts on the receiver and a good earth ground. (See figure below.) Use an AC voltmeter with at least 5000 ohms per volt sensitivity to measure the voltage across the resistor. Check all exposed metal parts and measure voltage at each point. Voltage measurements should not exceed .75VAC, 500µA. Any value exceeding this limit constitutes a potential shock hazard and must be corrected. If the AC plug is not polarized, reverse the AC plug and repeat exposed metal part voltage measurement at each point.

HIGH VOLTAGE SHUTDOWN TEST

Apply 120VAC and turn receiver on. Set all digital customer controls for normal operation. Momentarily short test point X to test point R. Receiver should lose raster and sound. If the receiver does not lose raster and sound, the shutdown circuit should be repaired. To resume normal operation, remove AC power and wait 30 seconds. After restoring AC power, the receiver should power up automatically.

The listing of any available replacement part herein in no case constitutes a recommendation, warranty, or guarantee by SAMS Technical Publishing, LLC as to the quality and suitability of such replacement part. The numbers of the listed parts have been compiled from information furnished to SAMS Technical Publishing, LLC by the manufacturers of the specific type of replacement part listed.

Reproduction or use, without express permission, of editorial or pictorial content, in any manner, is prohibited. No patent liability is assumed with respect to the use of the information contained herein.

© 2007 SAMS Technical Publishing, LLC
9850 E. 30th	St.
Indianapolis IN 46229			!IBCGC\|05266S
www.samswebsite.com			!IBCGC\|05266S
www.samswebsite.com
Printed in the United States of America 5 4 3 2 1		07PF03377
Page 1	SET 5266

5266

SET 5266

MODEL CZ36V61 (CHASSIS TAC9922)

TOSHIBA

INDEX
High Voltage Shutdown Test ....................	1
Important Parts Information .....................	1
Miscellaneous Adjustments .....................	1
Parts List ...................................................	4
Placement Chart .......................................	1
Safety Precautions ....................................	1
Schematic Component Location ..............	3
Schematic Notes .......................................	2
Schematics
A/V Switching ...................................	3
CRT ...................................................	2
PIP Control ........................................	2
Power Supply ....................................	2
System Control ..................................	4
Television ..........................................	2
Test Equipment .........................................	1
Tuner Information ....................................	1

For a Complete List of Manuals,

Visit www.samswebsite.com

5266

Technical Service Data

TOSHIBA

Model CZ36V61 (Chassis TAC9922)

Representative Model

Essential coverage

for servicing a television receiver...

•Schematics

•Component locations

•Parts list

Coverage includes this additional model and chassis:

Model	Chassis
CZ32V61	TAC9920

JUNE 2007 SET 5266

5266

SC3100

CM2125

VG91

SC3100

HP200

TP212

PR570

LC102

CR7000

PR570

LC102

TVA92

SL753

TF46 HA-2500 VG91, TVA92

Obtaining Parts

Many of these parts are available from your local Sams authorized distributor or the manufacturer of the equipment. Sams for the name of your nearest distributor:

800-428-7267

TEST EQUIPMENT

Test equipment listed by participating manufacturer illustrates typical or equivalent equipment used by Sams engineers to obtain measurements. This equipment is compatible with most types used by field service

technicians.

Equipment Sencore No.

Important Parts Information

n Parts not listed in the parts list are commonly available at your local electronics parts retailer. n The parts listed here are those not usually available from a well-stocked supply cabinet or bin.

n On the parts lists, safety items are marked with a # to remind you that only exact replacements are recommended for these items.

n When ordering parts, state the model number, part number, and description.

Page 1

SET 5266

TUNER INFORMATION

MAIN TUNER VOLTAGE CHART

MAIN TUNER TERMINAL GUIDE

VHF Low Band

VHF High Band

UHF Band

(AGC)

1.7V

1.6V

(A)

4.6V

(1)

4 (SCL)

4.3V

(SDA)

4.3V

(MB)

(+5V)

5.0V

(3)

9 (+32V)

32.7V

11 (IF)

(4)

NOTE: VHF Low Band voltages taken on channel 2.

(5)

VHF High Band voltages taken on channel 7.

(6)

UHF Band voltages taken on channel 14.

(7)

(9)

(11)

PIP TUNER VOLTAGE CHART

PIP TUNER TERMINAL GUIDE

VHF Low Band

VHF High Band

UHF Band

(NC)

2 (+32V)

32.7V

(1)

(SCL)

4.4V

(SDA)

4.3V

(2)

(NC)

(ADS)

(3)

7 (+5V)

5.0V

(AGC)

3.4V

3.6V

3.2V

(4)

(9V)

8.7V

10 (A OUT)

(5)

11 (GND)

(6)

12 (AFT)

1.8V

2.0V

13 (NC)

(7)

14 (GND)

15 (V OUT)

4.4V

(8)

NOTE: VHF Low Band voltages taken on channel 2.

(9)

VHF High Band voltages taken on channel 7.

UHF Band voltages taken on channel 14.

(10)

(11)

(12)

(13)

(14)

(15)

Call

Oscilloscope

Generators

RGB

Multiburst Signal

Color Bar

TV Stereo

Digital VOM

Frequency Meter

Hi-Voltage Probe

Accessory Probes

Isolation Transformer

Capacitance Analyzer

CRT Analyzer

AC Leakage Tester

Inductance Analyzer

Flyback Yoke Tester

Field Strength Meter

Transistor Tester

Horizontal Analyzer

Video Analyzer

HIGH VOLTAGE CHECK

Tune in a picture. Set brightness, contrast, and color to minimum. Connect a high voltage probe to the CRT anode. Model CZ32V61: high voltage should read 31kV

to 32.4kV. Model CZ36V61: high voltage should read 31.9kV to 33.3kV.

ENTERING THE SERVICE AND DESIGN MODES

To enter the service mode, press the mute button on the remote. Press the mute button again and keep pressing while simultaneously pressing the menu button on the receiver. The letter S will appear on the screen indicating that the receiver is in the service mode.

To enter the design mode, enter the service mode and press and hold the recall button while simultaneously pressing the menu button on the receiver. The letter D will appear on the screen indicating that the receiver is in the design mode. No items are to be adjusted according to the manufacturer. No information available for option codes.

When in the service mode or design mode, press the menu button on the receiver to display the adjustment menu. To select the item to be adjusted, press the channel up or down button. To adjust the reference value, press the volume up or down button. To exit from the service mode or the design mode, press the power button to turn

off the receiver.

TEST SIGNAL SELECTION

Enter the service mode. Press the menu button on the receiver to display the adjustment menu. Press the TV/video button on the remote to display the built-in test patterns in the following order:

Normal picture, red raster, green raster, blue raster, black screen, white screen, black screen with white window, black cross bar, white cross bar, black crosshatch, white crosshatch, black crossdot, white crossdot, white h signal, black h signal, black cross bar on green raster, and back to normal picture. In some models the audio test signal may not work with the white h signal, black h signal, black cross bar on green raster test patterns.

NOTE: If a video cable is connected to the video input jack, the built-in test

patterns will not be displayed on the screen.

SELF DIAGNOSTIC FUNCTION

Enter the service mode. Press the 9 button on the remote to check for proper execution of IC interfacing. The following is an explanation of what is displayed on screen:

Display	Explanation
[SELF CHECK]	Self diagnostic function.
No. 23905036	Part number of QA01.
POWER : 000	Operation number of protecting circuit.
	000 display is normal.
BUS LINE : OK	BUS line check. OK is normal.
	SCL-GND indicates a short to ground of
	the SCL signal. SDA-GND indicates a
	short to ground of the SDA signal.
	SCL-SDA indicates a short between
	SCL and SDA signals.
BUS CONT : OK	Bus line acknowledge check. OK is
	normal. A location number is NG.
	QA02 NG indicates QA02 is bad.
BLOCK : UV V1 V2	Green display is normal. Cyan display is
QV01 QV01S	no check. Red display is NG. UV is TV
	mode, V1 is Video 1 mode, and
	V2 is Video 2 mode. UV, V1, and V2
	may not be used in some models.

To initialize the self diagnostic data, press and hold the recall button on the remote while simultaneously pressing the channel down button on the receiver.

MISCELLANEOUS ADJUSTMENTS

INITIALIZATION OF QA02

NOTE: QA02 must be initialized after replacement. Do not initialize QA02 unless it has been replaced.

Enter the service mode. Press and hold the recall button on the remote while simultaneously pressing the channel up button on the receiver. The initialization of

QA02 is complete. Program channels into memory.

ITEM BUTTONS

The following is a list of the buttons on the remote that will go to an item or perform a different function of the service mode:

1	RCUT	5	COLC
2	GCUT	6	TNTC
3	BCUT	8	Toggles audio test signal on and off.
4	SCNT	9	Self diagnostics

SUB COLOR (COLC) & SUB TINT (TNTC)

Tune in a color bar pattern. Set contrast to maximum and brightness to midrange. Connect an oscilloscope to the red cathode. Enter the service mode. Select item COLC and adjust reference value to obtain 150Vp-p. Tune in an active channel.

SUBelect item TNTC and adjust reference value for proper flesh tones.

BRIGHTNESS (BRTC)

Tune in a picture. Set contrast to minimim and brightness to center. Enter the service mode. Select item BRTC, adjust reference value until vertical retrace line just disappears. Adjust contrast for normal picture. Perform Height (HIT)

adjustment.

HORIZONTAL POSITION (HPOS) / VERTICAL POSITION (VPOS)

Enter the service mode. Press the TV/video button on remote until a crossbar pattern is displayed. Select item HPOS or VPOS and adjust reference value for the horizontal and vertical position alternately until the pattern is centered on the

screen. Check the position of the picture with off-air signal.

HEIGHT (HIT)

Enter the service mode. Press the TV/video button on remote until a crosshatch pattern is displayed. Select item HIT and adjust reference value for slight underscan. Advance the data value by 9 steps and check the vertical position of the

picture.

WIDTH (WID)

Enter the service mode. Press the TV/video button on reme until a crosshatch pattern is displayed. Select item WID, adjust reference value for slight underscan. Advance the reference value by 7 steps. Check for proper horizontal position of the

picture.

E-W PARABOLA (DPC)

Enter the service mode. Press the TV/video button on remote until a crosshatch pattern is displayed. Select item DPC, adjust reference value for straight vertical

lines on both sides of the pattern.

WHITE BALANCE (RCUT, GCUT, BCUT, GDRV, BDRV)

Turn receiver on. Allow a 10 to 30 minute warm up time. Adjust contrast to center and brightness to maximum. Enter the service mode. Press the TV/video button on remote until the white screen pattern is displayed. Select items RCUT, GCUT, BCUT, GDRV, and BDRV and set the reference value for each to 40H. Press the TV/video button on the receiver to obtain a single horizontal line. Advance the screen control until a faint line of one predominant color appears on the screen. Adjust the other two cutoff items to obtain a dim white line. Press the TV/video button on the receiver to get full deflection. Select items GDRV and BDRV and adjust reference value of each for the best black and white picture on screen.

COLOR PURITY / CONVERGENCE

The yoke is bonded to the CRT. Color purity and convergence adjustments are not

recommended.

STEREO

Enter the service mode.

Attenuator (ATT)

Select item ATT. Input a 1kHz, 30% modulated signal. Connect a RMS meter to

pin 12 of H002. Adjust reference value to obtain a reading of 130mVrms.

Stereo VCO (STVC)

Select item STVC. Connect a frequency counter to pin 12 of H002 and connect pin

9 to ground. Adjust reference value to obtain a reading of 62.936kHz.

SAP VCO (SAVC)

Select item SAVC. Input 78.67kHz, 147mVrms to pin 9 of H002. Input a mono signal. Adjust reference value for a reading in the center of the range for STA7=0

and STA8=1.

Stereo Filter (STRF)

Select item STRF. Input 9.4kHz, 600mVrms to pin 9 of H002. Input a mono signal.

Adjust reference value for a reading in the center of the range for STA3=1.

SAP Filter (SAPF)

Select item SAPF. Input 88kHz, 110mVrms to pin 9 of H002. Input a mono signal.

Adjust reference value for a reading in the center of the range for STA4=1.

Stereo Separation (WBAN) / Spectral (SPEC)

Select item WBAN. Input 300Hz, right channel signal. Select stereo mode on receiver. Connect an oscilloscope to pin 14 of H002. Adjust reference value for minimum amplitude of waveform. Select item SPEC. Input 3kHz, right channel

signal. Adjust reference value for minimum amplitude of waveform.

Audio Test Signal

Enter the service mode. Press the 8 button on remote transmitter to toggle the audio test signal (1kHz) on and off.

			SET 5266		Page 1
	SERVICE MODE ADJUSTMENT CHART
Item	Adjustment	Direct	Preset	32”	36”
Item	Name	Button	Value	Value	Value
RCUT	Red Cutoff	1	40H	40H	40H
GCUT	Green Cutoff	2	40H	40H	40H
BCUT	Blue Cutoff	3	40H	40H	40H
GDRV	Green Drive	-	40H	40H	40H
BDRV	Blue Drive	-	40H	40H	40H
SCNT	Sub Contrast	4	08H	08H	08H
BRTC	Sub Brightness	-	40H	40H	40H
COLC	Sub Color	5	40H	40H	40H
TNTC	Sub Tint	6	40H	40H	40H
SAVC	SAP VCO	-	88H	88H	88H
ATT	Attenuator	-	08H	08H	08H
SAPF	SAP Filter	-	88H	88H	88H
STVC	Stereo VCO	-	1CH	1CH	1CH
STRF	Stereo Filter	-	16H	16H	16H
SPEC	Spectral	-	30H	30H	30H
WBAN	Stereo Separation	-	22H	22H	22H
HPOS	Horizontal Position	-	16H	16H	16H
VPOS	Vertical Position	-	03H	03H	03H
HIT	Height	-	1EH	1EH	1EH
LIN	Vertical Linearity	-	07H	06H	06H
VSC	Vertical S Correction	-	01H	04H	04H
VPS	Vertical Shift	-	1BH	1BH	1BH
VCP	Vertical Compensation	-	03H	03H	03H
WID	Width	-	37H	18H	35H
DPC	E-W Parabola	-	17H	0AH	17H
CNR	E-W Corner	-	07H	07H	09H
TRAP	Trapezium	-	0EH	09H	08H
HCP	Horizontal Compensation	-	00H	00H	00H
VFC	Vertical F Correction	-	0FH	0FH	0FH
PCOL (1)	PIP Color	-	08H	08H	08H
PHUE (1)	PIP Tint	-	00H	00H	00H
DAC	-	-	03H	03H	03H
PGOF (1)	-	-	00H	00H	00H
PROF (1)	-	-	0AH	0AH	0AH
PBOF (1)	-	-	0AH	0AH	0AH

(1) Adjust to match PIP brightness, white balance, tint, and color to main screen.

TOSHIBA

AC9922)T (CHASSIS CZ36V61 MODEL

SET 5266 Page 1

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