Colour Television

TX-28CK1P

TX-25CK1P

TX-21CK1P

Z8 Chassis

SPECIFICATION(Information in brackets refers to model TX-25CK1P)(Information in brackets [ ] refers to model TX-21CK1P)

Power Source: 220-240V a.c., 50Hz

Power Consumption: 97W 97W [88W]

Stand-by PowerConsumption: 0,9W 0,9W [1W]

Aerial Impedance: 75Ω unbalanced, Coaxial Type

Receiving System: PAL B/G, PAL D/K ,PAL-60SECAM B/G, SECAM D/KM.NTSC (AV)NTSC (AV only)

Receiving Channels:VHF E2-E12 VHF H1-H2 (ITALY)VHF A-H (ITALY) VHF R1-R2VHF R3-R5 VHF R6-R12UHF E21-E69 CATV (S01-S05)CATV S1-S10 (M1-M10) CATV S11-S20 (U1-U10)CATV S21-S41 (HYPERBAND)

Intermediate Frequency:Video/AudioVideo 38,9MHzAudio 32,4MHz, 32,66MHz (A2 CZECH)

33,05MHz (NICAM)33,4MHz, 33,16MHz (A2)33,05MHz (NICAM B/G)

Colour 34,47MHz34,5MHz, 34,65MHz

Terminals:AV1 IN Video (21 pin) 1V p-p 75Ω

Audio (21 pin) 500mV rms 10kΩRGB (21 pin) 0,7V p-p 75Ω

AV1 OUT Video (21 pin) 1V p-p 75ΩAudio (21 pin) 500mV rms 1kΩ

AV FRONT Video (21 pin) 1V p-p 75ΩAudio (21 pin) 500mV rms 10kΩ

High Voltage: 28kV +0,7kV - 1kV 28kV +0,7kV -1kV[27kV +0.7kV - 1kV]

Picture Tube: A66ECF50X04 63cmA59ECF50X04 59cm[ A51EER35X80 51cm]

Audio Output: 2 x 10W (M.P.O.)2 x 5W (R.M.S.)8Ω Impedance

Headphones: 8Ω Impedance3,5mm

Accessoriessupplied : Remote Control

2 x R6 (UM3) Batteries

Dimensions:Height: 580mm 538mm [476mm]Width: 646mm 580mm [512mm]Depth: 471mm 442.5mm [470mm]

Net weight: 33kg 27kg [20.6kg]

Specifications are subject to change without notice.Weights and dimensions shown are approximate.

NOTE: This Service Manual should be used in conjunction withthe Z8 Technical guide.

ORDER No. 99-SM-009

CONTENTSSAFETY PRECAUTIONS..........................................................................................................................................................2SERVICE HINTS.......................................................................................................................................................................3ADJUSTMENT PROCEDURE AND FACTORY SETTINGS .....................................................................................................4WAVEFORM PATTERN TABLE ...............................................................................................................................................5ALIGNMENT SETTINGS...........................................................................................................................................................6BLOCK DIAGRAMS ..................................................................................................................................................................7PARTS LOCATION .................................................................................................................................................................10REPLACEMENT PARTS LIST ................................................................................................................................................11SCHEMATIC DIAGRAMS .......................................................................................................................................................20CONDUCTOR VIEWS.............................................................................................................................................................25

SAFETY PRECAUTIONSGENERAL GUIDE LINES

1. It is advisable to insert an isolation transformer in thea.c. supply before servicing a hot chassis.

2. When servicing, observe the original lead dress in thehigh voltage circuits. If a short circuit is found, replaceall parts that have been overheated or damaged bythe short circuit.

3. After servicing, see that all the protective devicessuch as insulation barriers, insulation papers, shieldsand isolation R-C combinations are correctlyinstalled.

4. When the receiver is not being used for a long periodof time, unplug the power cord from the a.c. outlet.

5. Potentials as high as 28,7kV, 28,7kV, [27,7kV] arepresent when this receiver is in operation. Operationof the receiver without the rear cover involves thedanger of a shock hazard from the receiver powersupply. Servicing should not be attempted by anyonewho is not familiar with the precautions necessarywhen working on high voltage equipment. Alwaysdischarge the anode of the tube.

6. After servicing make the following leakage currentchecks to prevent the customer from being exposedto shock hazard.

LEAKAGE CURRENT COLD CHECK1. Unplug the a.c. cord and connect a jumper between

the two prongs of the plug.2. Turn on the receiver’s power switch.3. Measure the resistance value with an ohmmeter,

between the jumpered a.c. plug and each exposedmetallic cabinet part on the receiver, such as screwheads, aerials, connectors, control shafts etc. Whenthe exposed metallic part has a return path to thechassis, the reading should be between 4M ohm and20M ohm. When the exposed metal does not have areturn path to the chassis, the reading must beinfinite.

LEAKAGE CURRENT HOT CHECK1. Plug the a.c. cord directly into the a.c. outlet. Do not

use an isolation transformer for this check.2. Connect a 2kΩ 10W resistor in series with an

exposed metallic part on the receiver and an earth,such as a water pipe.

3. Use an a.c. voltmeter with high impedance tomeasure the potential across the resistor.

4. Check each exposed metallic part and check thevoltage at each point.

5. Reverse the a.c. plug at the outlet and repeat each ofthe above measurements.

2

6. The potential at any point should not exceed1,4Vrms. In case a measurement is outside the limitsspecified, there is a possibility of a shock hazard, andthe receiver should be repaired and rechecked beforeit is returned to the customer.

X-RADIATION WARNING1. The potential sources of X-Radiation in TV sets are

the high voltage section and the picture tube.2. When using a picture tube test jig for service, ensure

that the jig is capable of handling 28,7kV, 28,7kV,[27,7kV] without causing X-Radiation.

NOTE: It is important to use an accurate periodicallycalibrated high voltage meter.1. Set the brightness to minimum.2. Measure the high voltage. The meter should indicate.

TX-28,25CK1P 28kV +0,7kV -1kV. TX-21CK1P 27kV +0,7kV -1kV.

If the meter indication is out of tolerance, immediateservice and correction is required to prevent the possibilityof premature component failure.3. To prevent any X-Radiation possibility, it is essential

to use the specified tube.

HOT CHECK CIRCUIT

a.c. VOLTMETER

WATER PIPE(EARTH)

TO INSTRUMENT'S EXPOSEDMETALLIC PARTS Fig. 1.

2kΩΩΩΩ 10 Watts

ADJUSTMENT PROCEDUREItem / Preparation Adjustments+B SET-UP1. Receive a Greyscale signal.2. Set the controls :-

Brightness Minimum

Contrast Minimum

Volume Minimum

Confirm the following voltages.

+B1 3,3 ± 0,3V +B13 -13 ± 1V+B2 195 ± 10V +B14 27,5 ± 1,5V

195 ± 10V 27,5 ± 1,5V [190 ± 10V] [27,5 ± 1,5V]

+B3 13,5 ± 1V +B15 28 ± 1,5V 13,5 ± 1V 28 ± 1,5V [12,5 ± 1V] [28 ± 1,5V] +B4 10 ± 1V +B16 11,5 ± 1V +B8 5 ± 0,3V 11,5 ± 1V +B11 147 ± 10V [11,5 ± 1V]

147 ± 10V +B17 8 ± 1V [127 ± 10V] +B18 5 ± 0,3V

CUT OFF / Ug2 Adjustment1. Receive a Greyscale signal.2. Degauss the tube externally.3. Set the TV into Service Mode 1.4. Select Ug2 Test.

Set Contrast on maximum, set Brightness on center, switchon AV mode.Enter Service mode. Set Sub-Brightness to 31. Select Ug2Test. Press "+" and adjust screen Vr till sharp vertical line isvisible and LED switches off. Then reduce screen Vr till LEDis just switched on (pin6 of connector E6 must be connectedto GND).

Note: To set up ”white balance” first set up “Cut off” register to 8. Then set up “high-light” with the help of “drive” registers.Finish setting-up of “Low-light” with the help of ”Cut-off” register.Carry out setting-up of ”white balance” in available TV systems (PAL, SECAM).

FACTORY SETTINGSTo return customer settings to factory settings and clear owner ID of all information input by the customer, enter Self-Checkmode. Press the down (-/v) button on the customer controls at the front of the TV set, at the same time pressing the STATUS

[OPTION 1 4C]

[OPTION 2 00]

OPTION 1 6C

OPTION 2 00

Service AidsTo aid in the service of our current chassis there are a number of Service Aids which have been made available.• LUCI interface kit (Linked Utility Computer Interface)

Part number: TZS6EZ002This contains interface and cables for connecting TV service connector and a PC as well as diagnostic software. As newmodels are introduced upgrade software will become available.

• VICI (Visual Interactive Computer Information)These C.D.'s contain multimedia documentation providing quick access to service information.Part No. TZS7EZ006, TZS7EZ005 & TZS8EZ0011. Service Manuals2. Instruction Books3. Technical Information

• TASMIN (Technically Advanced System for Multimedia Interactive Notes)As well as providing a first step towards more interactive training this product also achieves quick access to TechnicalInformation.

OPTION 1 6C

OPTION 2 00

button on the remote control. To exit Self Check, switch off the TV set at the power button.NOTE: Self Check should only be used when refurbishing the TV set and not during normal repair work.

4

WAVEFORM PATTERN TABLE

VERT - OUTIC 601Pin 21

20ms

1V

IC 451Pin 2

VERT - DRIVE

20ms

50V

IC 451Pin 3

VFLB

20ms

28,4

V

H - OUTIC 601Pin 33

64µs

3V

EW - OUTIC 701Pin 5

64µs

20V

H - PULSEBase Q501

64µs

1,4V

IC 701Pin 8

HFLB

64µs

2V

FBI/SCOIC 601Pin 34

64µs

5,7V

SCLIC 601Pin 2

47µs

5V

B - OUTIC 601Pin 53

64µs

2,7V

R - OUTIC 601Pin 51

64µs

2,7V

G - OUTIC 601Pin 52

64µs

2,7V

IC601Pin 38

VIDEO OUT

64 µs

2,7

V

5

ALIGNMENT SETTINGSEnter in service mode:By imputing remote code "FA" followed by key "0" (19 hex) or press "MUTE" on remote control and "V" on TV set, when thesharpness is set on minimum and programme position is on 99.Use ∧∧∧∧=/=∨∨∨∨====remote buttons to cycle through the service items.Use ++++=/=−−−− remote keys to decrement / increment the values within range.STR lokal key stores the current data.To exit service mode press "N" button.

Alignment FunctionSetting indication

Note: All setting values are approximate Settings / Special features

1. Cut off (Ug2) LED On/Off(pin6 of connector E6 to the GND) LED to be just On

2. Vertical slope V-SLO 32 Optimum setting

3. Vertical shift V-POS 43 Optimum setting.

4. Vert. Amplitude V-AMP 60 Optimum setting.

5. Horizontal shift H-CTR 31 Optimum setting.

6. Horizontal parallelogram H-PAR 034 034 [-] Optimum setting.

7. Horizontal bow H-BOW 031 031 [-] Optimum setting.

8. R - Cut R - CUT 8 Optimum setting.

9. B - Cut B - CUT 8 Optimum setting.

10. R - Drive R - DRV 31 Optimum setting.

11. G - Drive G - DRV 31 Optimum setting.

12. B - Drive B - DRV 31 Optimum setting.

13. AGC AGC 20 Optimum setting.

14. Sub Colour S - COL 15 Optimum setting.

15. Sub Brightness S - BRI 31 Optimum setting.

For models TX-25CK1P and TX-28CK1P only:

Alignment Function Setting indicationNote: All setting values are approximate Settings / Special features

18. Horizontal Width EW – WD 34 Optimum setting.

19. EW parabola EW – PR 32 Optimum setting.

20. EW Upper corners EW – UC32 Optimum setting.

21. EW Lower corners EW – LC 33 Optimum setting.

22. EW Trapezoid EW – TP 36 Optimum setting.

Imput remote code "FA" followed by key 5 (14 hex) or press "V" on remote control:

Option Byte - 1 Option Byte Table Option Byte - 2 Option Byte Table

Bit No. Value Functions Bit No. Value Functions

0 0 French model 01

NOYES 0 0

1 0 Irish model 01

NOYES 1 0

2 1 NICAM enabled 01

NOYES 2 0

3 1 A2 stereo enabled 01

NOYES 3 0

4 0 Tuner manufacturer 01

MACOALPS 4 0

5 1 [0] CRT 01

21"25",28" 5 0

6 1 Q - link enabled 01

NOYES 6 0

6

(

(

< <

( 9

+ 2 7

<

&RPSRQHQWV,GHQWLILHGE\PDUNKDYHVSHFLDOFKDUDFWHULVWLFVLPSRUWDQWIRUVDIHW\ :KHQUHSODFLQJDQ\RIWKHVHFRPSRQHQWVXVHRQO\PDQXIDFWXUHUVVSHFLILHGSDUWV,QFDVHRIRUGHULQJWKHVHVSDUHSDUWVSOHDVHDOZD\VDGGWKHFRPSOHWH0RGHO7\SHQXPEHUWR\RXURUGHU

'HVFULSWLRQ&FW5HI 3DUWV1XPEHU 'HVFULSWLRQ&FW5HI 3DUWV1XPEHU

0(&+$1,&$/3$576

63($.(5 ($6*'$

781(5 (19'*

5(027(&21752/ (85

%$77(5<&29(5 (85(&$

3$1$%$'*( 7%0(

32:(5%8721 7%;(

.(<%8721 7%;(

$9&29(5 7..(

&+$66,65$,/5,*+7 70=(

&+$66,65$,//()7 70=(

32:(5&25' 76;(

0,6&(//$1(286&20321(176

/,*+778%( 7.3(

/('9,625 7.3(

%$77(5<3$&. 80'-3

/('+2/'(532( 70:(

6(16255 3

5(/$<5/ '-'0

,16758&7,21%22.6

%8/*$5,$1520$1,$1 74%(01

32/,6++81*$5,$1 74%(34

&=(&+(1*/,6+ 74%(58

,&V

$8',2287387,& 7'$

32:(56833/<,& 675)/)

95(*8/$725,& /005%

95(*8/$725,& %$70

5(6(7,&,& 01+7$

/('5(&(,9(5,& 530

5(6(7,& 0157$

95(*8/$725,& %$7

95(*8/$725,& %$70

$8',2352&(6625,& 063'32$

)86(6

)86()

)86() 757

)86() 757

)86() 757

)86(+2/'(5) (<)%&

)86(+2/'(5) (<)%&

',2'(6

',2'(' 07=-7$

',2'(' 07=-7$

',2'(' 0$7$

',2'(' 07=-7&

',2'(' 07=-7&

',2'(' 07=-7%

',2'(' 65$7

',2'(' 65$7

',2'(' 65$7

',2'(' 0$7$

',2'(' 0$7$

',2'(' 0$7$

',2'(' 0$7$

',2'(' (5$9

',2'(' 07=-%

',2'(' 65$7

',2'(' 07=-7$

',2'(' 65$7

',2'(' 0$7$

',2'(' 07=-7$

',2'(' 0$7$

',2'(' 0$7$

',2'(' 5%9

',2'(' $89

3+272&283/(5' 7/3*5/)

',2'(' 65$7

',2'(' 65$7

',2'(' 5.1/)$

',2'(' 0$7$

',2'(' 65$7

',2'(' 0$7$

',2'(' 07=-7'

',2'(' 79658$0/)$

',2'(' 79658$0/)$

',2'(' 65$7

',2'(' 07=-7$

/('' 6/585)/)

',2'(' 0$7$

',2'(' 0$7$

',2'(' 7966:%6

',2'(' 0$7$

',2'(' 0$7$

',2'(' 07=-7$

75$16,67256

75$16,67254 %&%

75$16,67254 %&%

75$16,67254 %&%

75$16,67254 %&%

75$16,67254 6'0

75$16,67254 %&%

75$16,67254 %&%

75$16,67254 %&%

75$16,67254 %&%

75$16,67254 6$5

'HVFULSWLRQ&FW5HI 3DUWV1XPEHU 'HVFULSWLRQ&FW5HI 3DUWV1XPEHU

75$16,67254 6'5

75$16,67254 %&%

75$16,67254 %&%

75$16,67254 %&%

75$16,67254 %&%

75$16,67254 %&%

75$16,67254 %&%

75$16,67254 %&%

75$16,67254 %&%

75$16,67254 %&%

75$16,67254 %&%

75$16,67254 %&%

75$16,67254 %&%

75$16,67254 %&%

75$16,67254 %&%

75$16,67254 6&6

75$16)250(56

75$16)25(57 (7+=$=

75$16)250(57 (73.$18

&2,/6

&2,/- (;&(/6$7

&2,// 7$/99%.

&2,// 7$/99%.

&2,// 7$/99%.

&2,// (;&(/'59

&2,// (;&(/6$7

&2,// (;&(/'59

&2,// (;&(/6$7

&2,// (;&(/6$7

&2,// (;&(/6$7

&2,// 7$/99%.

&2,// 7$/99%5.

&2,// 7$/99%5.

&2,// (;&(/6$7

&2,// 7$/99%5.

&2,// 7$/99%.

&2,// 7/7.5

&2,// 7/7.5

&2,// (;&(/6$7

&2,// (;&(/6$7

&2,// 7$/99%.

&2,// (;&(/'59

&2,// (;&(/'59

),/7(56

/,1(),/7(5/ (/)1$

6$:),/75; ..

&5<67$/6

&5<67$/; 766$

&5<67$/; ()&:6)7

&5<67$/;

5(6,67256

60&$5%& (5-*(<5 :

5(6,6725- (5'79 :

60&$5%-$ (5-*(<5 :

60&$5%-$ (5-*(<5 :

60&$5%-$ (5-*(<5 :

60&$5%-$ (5-*(<5 :

60&$5%-$ (5-*(<5 :

60&$5%-$ (5-*(<5 :

60&$5%-$ (5-*(<5 :

60&$5%-$ (5-*(<5 :

60&$5%-$ (5-*(<5 :

60&$5%-$ (5-*(<5 :

60&$5%-$ (5-*(<5 :

60&$5%-$ (5-*(<5 :

60&$5%-$ (5-*(<5 :

60&$5%-$ (5-*(<5 :

60&$5%-$ (5-*(<5 :

60&$5%-$ (5-*(<5 :

60&$5%-$ (5-*(<5 :

60&$5%-$ (5-*(<5 :

60&$5%-$ (5-*(<5 :

60&$5%-$ (5-*(<5 :

60&$5%-$ (5-*(<5 :

60&$5%-$ (5-*(<5 :

60&$5%-$ (5-*(<5 :

60&$5%-$ (5-*(<5 :

60&$5%-$ (5-*(<5 :

60&$5%-$ (5-*(<5 :

60&$5%-$ (5-*(<5 :

60&$5%-$ (5-*(<5 :

60&$5%-$ (5-*(<5 :

60&$5%-$ (5-*(<5 :

60&$5%-$ (5-*(<5 :

60&$5%-$ (5-*(<5 :

60&$5%-$ (5-*(<5 :

60&$5%-$ (5-*(<5 :

60&$5%-$ (5-*(<5 :

60&$5%-$ (5-*(<5 :

60&$5%-$ (5-*(<5 :

60&$5%-$ (5-*(<5 :

60&$5%-6( (5-*(<5 :

60&$5%-6( (5-*(<5 :

60&$5%-6( (5-*(<5 :

60&$5%-6( (5-*(<5 :

60&$5%-6( (5-*(<5 :

60&$5%-6( (5-*(<5 :

60&$5%-6( (5-*(<5 :

60&$5%-6( (5-*(<5 :

60&$5%-6( (5-*(<5 :

60&$5%5 (5-*(<- :

60&$5%5 (5-*(<- :

60&$5%5 (5-*(<- : .

0(7$/5 (5*6-6 : .

60&$5%5 (5-*(<5 :

60&$5%5 (5-*(<- : .

60&$5%5 (5-*(<- : .

60&$5%5 (5-*(<- :

60&$5%5 (5-*(<5 :

60&$5%5 (5-*(<- : .

60&$5%5 (5-*(<- :

60&$5%5 (5-*(<- : .

60&$5%5 (5-*(<- :

60&$5%5 (5-*(<- :

5(6,67255 (5-*(<- :

60&$5%5 (5-*(<- : .

5(6,67255 (5-*(<- :

60&$5%5 (5-*(<- : .

60&$5%5 (5-*(<- :

60&$5%5 (5-*(<- : .

60&$5%5 (5-*(<- : .

60&$5%5 (5-*(<- : .

&$5%215 (5'7-5 : 5

&$5%215 (5'7-5 : 5

60&$5%5 (5-*(<- : .

5(6,67255 (5-*(<- : .

5(6,67255 (5-*(<- : .

&$5%215 (5'67- : .

&$5%215 (5'67- : .

&$5%215 (5'67- : .

&$5%215 (5'67- : .

'HVFULSWLRQ&FW5HI 3DUWV1XPEHU 'HVFULSWLRQ&FW5HI 3DUWV1XPEHU

&$5%215 (5'67- : .

&$5%215 (5'67- : .

60&$5%5 (5-*(<- : .

60&$5%5 (5-*(<- : .

60&$5%5 (5-(1) :

60&$5%5 (5-(1) :

60&$5%5 (5-(1) :

60&$5%5 (5-*(<-5 :

60&$5%5 (5-*(<- : .

60&$5%5 (5-*(<- : .

60&$5%5 (5-*(<- :

60&$5%5 (5-(1) :

60&$5%5 (5-*(<- :

&$5%215 (5'7- : .

5(6,67255 (5*6-6+ :

0(7$/5 (5*$1- :

60&$5%5 (5-*(<- : .

60&$5%5 (5-*(<- : .

&$5%215 (5'67- :

)86,%/(5 (54&-3 : .

60&$5%5 (5-*(<- : .

60&$5%5 (5-(1) :

60&$5%5 (5-*(<- :

60&$5%5 (5-*(<- :

60&$5%5 (5-*(<- :

60&$5%5 (5-*(<- : .

60&$5%5 (5-*(<- :

60&$5%5 (5-*(<- :

60&$5%5 (5-*(<- :

60&$5%5 (5-*(<- : .

60&$5%5 (5-*(<- : .

60&$5%5 (5-*(<- :

60&$5%5 (5-*(<- :

60&$5%5 (5-*(<- :

60&$5%5 (5-*(<- :

60&$5%5 (5-*(<- :

60&$5%5 (5-*(<- :

60&$5%5 (5-*(<- :

60&$5%5 (5-*(<- :

60&$5%5 (5-*(<- : .

60&$5%5 (5-*(<- : .

60&$5%5 (5-*(<5 :

60&$5%5 (5-*(<- : .

60&$5%5 (5-*(<- : .

60&$5%5 (5-*(<- : .

60&$5%5 (5-*(<- : .

60&$5%5 (5-*(<- : .

60&$5%5 (5-(1) : .

0(7$/5 (523.) : .

60&$5%5 (5-*(<- :

60&$5%5 (5-*(<- :

60&$5%5 (5-*(<- :

60&$5%5 (5-*(<- :

60&$5%5 (5-*(<- :

62/,'5 (5&=*.' : 0

:281'5 (5)=.5 : 5

0(7$/5 (5*$1- : .

&$5%215 (5'67- : .

5(6,67255 (5'67- : .

&$5%215 (5'67- : .

)86,%/(5 (54+- :

&$5%215 (5'7$- : 0

&$5%215 (5'67- :

&$5%215 (5'67- :

5(6,67255 (5*6-6+ :

5(6,67255 (5*6-6+ :

0(7$/5 (5*)- :

0(7$/5 (5*)- :

&$5%215 (5'67-5 : 5

&$5%215 (5'7- :

&$5%215 (5'7- : .

&$5%215 (5'67- : .

60&$5%5 (5-*(<- :

60&$5%5 (5-*(<- :

60&$5%5 (5-*(<- : .

60&$5%5 (5-*(<- : .

60&$5%5 (5-*(<- : .

60&$5%5 (5-*(<- : .

60&$55 (5-*(<- : .

60&$5%5 (5-*(<- : .

60&$5%5 (5-*(<- : .

60&$5%5 (5-*(<- : .

60&$5%5 (5-*(<- : .

60&$5%5 (5-*(<- :

60&$5%5 (5-*(<- :

60&$5%5 (5-*(<- :

60&$5%5 (5-*(<- :

60&$5%5 (5-*(<- :

60&$5%5 (5-*(<- :

60&$5%5 (5-*(<- :

60&$5%5 (5-*(<- :

60&$5%5 (5-*(<- :

60&$5%5 (5-*(<- :

60&$5%5 (5-*(<- : .

60&$5%5 (5-*(<- : .

60&$5%5 (5-*(<- : 0

60&$5%5 (5-*(<- : .

60&$5%5 (5-*(<- : .

60&$5%5 (5-*(<- : .

60&$5%5 (5-*(<- :

60&$5%5 (5-*(<- : .

60&$5%5 (5-*(<- : .

60&$5%5 (5-*(<- : .

60&$5%5 (5-*(<- : .

60&$5%5 (5-*(<- : .

60&$5%5 (5-*(<- : .

60&$5%5 (5-*(<- : .

60&$5%5 (5-*(<- : .

60&$5%5 (5-*(<- : .

60&$5%5 (5-*(<- : .

60&$5%5 (5-*(<- : .

&$5%215 (5'67- :

60&$5%5 (5-*(<- : .

60&$5%5 (5-*(<- : .

&$5%215 (5'67- :

60&$5%5 (5-*(<- :

60&$5%5 (5-*(<- :

60&$5%5 (5-*(<- : .

60&$5%5 (5-*(<- : .

60&$5%5 (5-*(<- : .

60&$5%5 (5-*(<- :

60&$5%5 (5-*(<- :

60&$5%5 (5-*(<- :

60&$5%5 (5-*(<- : .

60&$5%5 (5-*(<- : .

60&$5%5 (5-*(<- :

60&$5%5 (5-*(<- :

60&$5%5 (5-*(<- : .

60&$5%5 (5-*(<- :

60&$5%5 (5-*(<- :

60&$5%5 (5-*(<- :

60&$5%5 (5-*(<- : .

'HVFULSWLRQ&FW5HI 3DUWV1XPEHU 'HVFULSWLRQ&FW5HI 3DUWV1XPEHU

60&$5%5 (5-*(<- : .

60&$5%5 (5-*(<- : .

60&$5%5 (5-*(<- :

&$5%215 (5'67- :

60&$5%5 (5-*(<- :

60&$5%5 (5-*(<- :

60&$5%5 (5-*(<- :

60&$5%5 (5-*(<- :

&$5%215 (5'67- :

60&$5%5 (5-*(<- : .

60&$5%5 (5-*(<5 :

60&$5%5 (5-*(<5 :

60&$5%5 (5-*(<5 :

60&$5%5 (5-*(<- : .

&$5%215 (5'67- :

60&$5%5 (5-*(<5 :

60&$5%5 (5-*(<5 :

60&$5%5 (5-*(<- :

60&$5%5 (5-*(<- :

60&$5%5 (5-*(<5 :

&$3$&,7256

(/(&7& (&$&0*% 9 )

(/(&7& (&-9)+= 9 Q)

(/(&7& (&-9)+= 9 Q)

(/(&7& (&$+0*% 9 )

(/(&7& (&$+0% 9 )

(/(&7& (&$+0*% 9 )

60&$3& (&89+'&; 9 S)

60&$3& (&89+'&; 9 S)

(/(&7& (&-9%+. 9 )

(/(&7& (&-9%+. 9 )

(/(&7& (&$+0*% 9 )

(/(&7& (&-9%+. 9 )

&(5$0,&& (&.&+-% 9 Q)

),/0& (&40+- 9 Q)

(/(&7& (&$&0*% 9 )

(/(&7& (&-9%+. 9 )

(/(&7& (&$&+*% 9 )

(/(&7& (&$+0*% 9 )

),/0& (&40+- 9 Q)

(/(&7& (&$90*% 9 Q)

(/(&7& (&$90*% 9 Q)

(/(&7& (&$+05*% 9 )

(/(&7& (&$+0*% 9 )

(/(&7& (&$++*( 9 )

(/(&7& (&$+05*% 9 )

(/(&7& (&$+0*% 9 )

(/(&7& (&-<%+. 9 Q)

(/(&7& (&-<%+. 9 Q)

(/(&7& (&-<%+. 9 Q)

(/(&7& (&$(0% 9 Q)

&(5$0,&& (&.&+- 9 Q)

(/(&7& (&$(0% 9 )

(/(&7& (&$&0*% 9 )

60&$3& (&89+&&; 9 S)

(/(&7& (&$++*% 9 )

),/0& (&40+- 9 Q)

(/(&7& (&$+05*% 9 )

(/(&7& (&($+8 9 )

(/(&7& ((8)&+% 9 )

),/0& (&40.=: 9 Q)

60&$3& (&89+-&; 9 Q)

(/(&7& (&$(0% 9 )

(/(&7& (&$90*% 9 )

&(5$0,&& (&.&+- 9 S)

&(5$0,&& (&.&+- 9 S)

&(5$0,&& (&.&+- 9 S)

),/0& (&4)-=+ 9 Q)

),/0& (&:)-%% 9 )

(/(&7& (&$90*% 9 )

&(5$0,&& (&.&+- 9 S)

(/(&7& (&$90*% 9 )

(/(&7& (&$&0% 9 )

(/(&7& (&-<%+. 9 Q)

(/(&7& (&-9%+. 9 Q)

),/0& (&40+- 9 Q)

),/0& (&40+- 9 Q)

60&$3& (&89+-&; 9 Q)

(/(&7& (&$+0*% 9 )

(/(&7& (&$+05*% 9 )

(/(&7& (&-<%+. 9 Q)

(/(&7& (&-9%+. 9 )

(/(&7& (&-9%+. 9 Q)

(/(&7& (&-9%+. 9 Q)

),/0& (&40+- 9 Q)

),/0& (&40+- 9 Q)

(/(&7& (&$&0*% 9 )

60&$3& (&89+*&* 9 S)

(/(&7& (&-9)+= 9 Q)

60&$3& (&89+-&; 9 S)

60&$3& (&89+*&* 9 S)

),/0& (&4%+. 9 Q)

),/0& (&4%+. 9 Q)

),/0& (&4%+. 9 Q)

(/(&7& (&-<%+. 9 Q)

(/(&7& (&-<%+. 9 Q)

(/(&7& (&-<%+. 9 Q)

(/(&7& (&-9)+= 9 Q)

(/(&7& (&$+0*% 9 )

(/(&7& (&$+0*% 9 )

(/(&7& (&-9)+= 9 Q)

(/(&7& (&$+0*% 9 )

(/(&7& (&-9)+= 9 Q)

(/(&7& (&$&0% 9 )

(/(&7& (&$+0*% 9 )

(/(&7& (&$+0*% 9 )

(/(&7& (&$+0*% 9 )

(/(&7& (&$+05*% 9 )

(/(&7& (&$+0*% 9 )

(/(&7& (&-9%+. 9 )

&(5$0,&& (&.:1$0(& 9 Q)

&(5$0,&& (&.:1$0(& 9 )

),/0& (&4($0:% 9 Q)

&(5$0,&& (&.&+- 9 Q)

&(5$0,&& (&.&+- 9 Q)

&(5$0,&& (&.&+- 9 Q)

(/(&7& (&26*$%% 9 )

(/(&7& (&$++*% 9 )

&(5$0,&& (&.&+- 9 S)

&(5$0,&& (&.&$- .9 S)

&(5$0,&& (&.&'-% .9 S)

&(5$0,&& (&.&'- .9 Q)

(/(&7& (&$&+*( 9 )

&(5$0,&& (&.&+- 9 Q)

),/0& (&4%+. 9 Q)

(/(&7& (&$&0*% 9 )

&(5$0,&& (&.&+- 9 S)

(/(&7& (&-9)+= 9 Q)

(/(&7& (&$90*% 9 )

(/(&7& (&$&0*% 9 )

(/(&7& (&-9)+= 9 Q)

(/(&7& (&$++*( 9 )

'HVFULSWLRQ&FW5HI 3DUWV1XPEHU 'HVFULSWLRQ&FW5HI 3DUWV1XPEHU

(/(&7& (&$9+*% 9 S)

(/(&7& (&-9)+= 9 Q)

(/(&7& (&$&0*% 9 )

60&$3& (&89+-&; 9 S)

(/(&7& (&$+0*% 9 )

(/(&7& (&-9)+= 9 Q)

(/(&7& (&$+0*% 9 )

60&$3& (&89+-&; 9 S)

60&$3& (&89+-&; 9 S)

(/(&7& (&$&0*% 9 )

),/0& (&40+- 9 Q)

(/(&7& (&$+0*% 9 )

(/(&7& (&$+0*% 9 )

(/(&7& (&-9)&= 9 Q)

(/(&7& (&$+0*% 9 )

(/(&7& (&-9%+. 9 )

(/(&7& (&-9%+. 9 )

(/(&7& (&$+0*% 9 )

(/(&7& (&-9)+= 9 Q)

60&$3& (&89+-&; 9 Q)

60&$3& (&89+-&; 9 Q)

60&$3& (&89+-&; 9 Q)

60&$3& (&89+&&; 9 S)

60&$3& (&89+&&; 9 S)

60&$3& (&89+-&; 9 S)

60&$3& (&89+'7; 9 S)

60&$3& (&89+*&* 9 S)

60&$3& (&89+-&; 9 S)

(/(&7& (&-9)+= 9 Q)

(/(&7& (&-9)+= 9 Q)

(/(&7& (&$&0*% 9 )

(/(&7& (&$+0*% 9 )

),/0& (&40+- 9 Q)

),/0& (&40+- 9 Q)

60&$3& (&89+-&; 9 S)

60&$3& (&89+-&; 9 S)

(/(&7& (&-9)+= 9 Q)

(/(&7& (&$+05*% 9 )

(/(&7& (&$&0*% 9 )

(/(&7& (&$+0*% 9 )

(/(&7& (&$&0*% 9 )

(/(&7& (&$&0*% 9 )

60&$3& (&89+-&; 9 Q)

60&$3& (&89+-&; 9 Q)

(/(&7& (&-9)+= 9 Q)

60&$3& (&89+-&; 9 S)

(/(&7& (&-9%+. 9 )

(/(&7& (&-9)+= 9 Q)

(/(&7& (&$+0*% 9 )

60&$3& (&89+'&; 9 S)

60&$3& (&89+'&; 9 S)

(/(&7& (&$+0*% 9 )

(/(&7& (&-9)+= 9 Q)

60&$3& (&89+.%; 9 Q)

60&$3& (&89+.%; 9 Q)

60&$3& (&89+.%; 9 Q)

60&$3& (&89+.%; 9 Q)

60&$3& (&89+.%; 9 Q)

60&$3& (&89+.%; 9 Q)

60&$3& (&89+.%; 9 S)

60&$3& (&89+.%; 9 S)

7(50,1$/6$1'/,1.6

5&$+($'3+21(-$&.-. 7-%

6&$5762&.(7-. 7-%(

6:,7&+(6

6:,7&+6 (6%6%

6:,7&+6 (945

6:,7&+6 (945

6:,7&+6 (945

6:,7&+6 (945

6:,7&+6 (945

0(&+$1,&$/3$576

$12'(/($' =78=$($

%$&.&29(5 7.8(

&57 $((5;

&$%,1(7 7.<(

&57),;,1*6&5(: 93

'(*$866&2,/ 7/.(

(3&% 713(($3

)%7 =7)0$

)2&86/($'$66< 7;$-7)%$*

02'(//$%(/ 7%0(

<3&% 713(<$)

0,6&(//$1(286&20321(176

287(5&$5721 73&(

723&86+,21 73'(

%27720&86+,21 73'(

),;&/,302(

,&V

5*%287387,& 7'$4

9(57,&$/287387,& /$

82&,& 7'$96

(5525,&,& 6(1/)

((520,& ;3.$3

',2'(6

',2'(' 0$7$

',2'(' 65$7

',2'(' (8

',2'(' (8

',2'(' 7965+)9

',2'(' 58$0/)$

',2'(' 65$7

',2'(' 7%

',2'(' 07=-7'

',2'(' 58/)$

',2'(' 07=-7$

75$16,67256

75$16,67254 %8')5%

75$16,67254 %&%

75$16)250(56

75$16)25(57 (76.'%$&

&2,/6

&2,// (/+/

&2,// (/&'(

5(6,67256

&$5%215 (5'67- :

5(6,67255 (52&.)5 : 5

5(6,67255 (52&.)5 : 5

5(6,67255 (52&.)5 : 5

60&$5%5 (5-*(<- : .

60&$5%5 (5-*(<- : .

&$5%215 (5'7- : .

&$5%215 (5'7- : .

5(6,67255 (54&-35 : 5

60&$5%5 (5-(1) :

5(6,67255 (5'67- : .

'HVFULSWLRQ&FW5HI 3DUWV1XPEHU 'HVFULSWLRQ&FW5HI 3DUWV1XPEHU

&$5%215 (5'7- : .

:281'5 (5:3.5 : 5

&$5%215 (5'67- : .

60&$5%5 (5-*(<- : .

60&$5%5 (5-*(<- : .

60&$5%5 (5-*(<- : .

&$3$&,7256

(/(&7& (&($&156% 9 )

),/0& (&:+-9% )

&(5$0,&& (&.&'- .9 Q)

&(5$0,&& (&.&+- 9 Q)

(/(&7& (&$(05*% 9 )

(/(&7& (&-<%+. 9 Q)

60&$3& (&89+-&; 9 S)

0(&+$1,&$/3$576

$12'(/($' =78=$($

%$&.&29(5 7.8(

&57 $(&);

&$%,1(7 7.<(

&57),;,1*6&5(: 93

'(*$866&2,/ 7/.(

(3&% 713(($<

)%7 =7)/$

)2&86/($'$66< 7;)-7)%;**

02'(//$%(/ 7%0(

<3&% 713(<$*

0,6&(//$1(286&20321(176

),;&/,3

287(5&$5721 73&(

723&86+,21 73'(

%27720&86+,21 73'(

7+(50,6725'

&5762&.(76 7-6&

,&V

9(57,&$/287387,& /$1

82&,& 7'$96

(:&255(&7,21,& 7($$

95(*8/$725,& $1/

(5525$0/,),(5,& 6(1/)

((520,& ;3.%3

',2'(6

',2'(' 07=-7&

',2'(' (8

',2'(' 79658$0/)%

',2'(' 79658$0/)%

',2'(' (5'/

',2'(' 58/)$

',2'(' (8

',2'(' %='&

3+272&283/(5' 7/3*5/)

',2'(' 0$7$

',2'(' 0$7$

',2'(' 07=-7&

',2'(' 0$7$

',2'(' 0$07$

',2'(' 0$

',2'(' $89

',2'(' 07=-7'

',2'(' 07=-7'

',2'(' 0$7$

',2'(' 79658$0/)$

',2'(' 07=-7$

75$16,67256

75$16,67254 %&%

75$16,67254 %8$)5%

75$16,67254 %&%

75$16,67254 %&%

75$16,67254 %&%

75$16,67254 %&%

75$16,67254 6./%

75$16,67254 %&%

75$16)250(56

75$16)25(57 $

&2,/6

&2,/- (;&(/6$7

&2,// (/+/

&2,// (/&'(

&2,// (/&%/

&2,// (/&'(

5(6,67256

60&$5%-6( (5-*(<5 :

60&$5%-<$. (5-*(<5 :

0(7$/5 (5*6-6 :

60&$5%5 (5-*(<- : .

60&$5%5 (5-*(<- :

&$5%215 (5'67- :

&$5%215 (5'67- :

&$5%215 (5'67-5 : 5

&$5%215 (5'67-5 : 5

&$5%215 (5'67-5 : 5

0(7$/5 (5*6- : .

&$5%215 (5'7- : .

5(6,67255 (54$%-356 :

)86,%/(5 (54$- :

5(6,67255 (5'79 :

60&$5%5 (5-*(<- : .

5(6,67255 (5'67- : .

60&$5%5 (5-*(<- : .

60&$5%5 (5-*(<- : .

60&$5%5 (5-*(<- : .

60&$5%5 (5-*(<- : .

60&$5%5 (5-*(<- : .

&$5%215 (5'67- :

60&$5%5 (5-*(<- : .

60&$5%5 (5-*(<- : .

60&$5%5 (5-*(<- : .

60&$5%5 (5-*(<- : .

60&$5%5 (5-*(<- : .

60&$5%5 (5-*(<- : .

60&$5%5 (5-*(<- :

0(7$/5 (5*6- :

60&$5%5 (5-*(<- :

60&$5%5 (5-*(<- : .

60&$5%5 (5-*(<- : .

60&$5%5 (5-*(<- : .

60&$5%5 (5-*(<- : .

60&$5%5 (5-*(<- : .

60&$5%5 (5-*(<- : .

&$5%215 (5'67- : .

60&$5%5 (5-*(<- :

60&$5%5 (5-*(<- : .

)86,%/(5 (54+-5 : 5

60&$5%5 (5-*(<- :

5(6,67255 (5*6- : .

60&$5%5 (5-*(<- : .

5(6,67255 (5*)-+ :

'HVFULSWLRQ&FW5HI 3DUWV1XPEHU 'HVFULSWLRQ&FW5HI 3DUWV1XPEHU

:281'5 (5:3.5 : 5

&$5%215 (5'67- : .

60&$5%5 (5-*(<- : .

60&$5%5 (5-*(<- : .

60&$5%5 (5-*(<- : .

&$3$&,7256

(/(&7& (&-9)+= 9 Q)

60&$3& (&89+=); 9 Q)

&(5$0,&& (&.&'- .9 Q)

60&$3& (&89+.%; 9 S)

60&$3& (&89+-&; 9 S)

(/(&7& (&$&05% 9 )

),/0& (&:+-9% 9 Q)

(/(&7& (&$*+*5% 9 Q)

&(5$0,&& (&.&'- .9 S)

&(5$0,&& (&.&+- 9 Q)

(/(&7& (&-<%+. 9 Q)

60&$3& (&89+-&; 9 S)

60&$3& (&89+-&; 9 S)

60&$3& (&89+-&; 9 S)

60&$3& (&-<%+. 9 Q)

(/(&7& (&$+0*% 9 )

(/(&7& (&-9)+= 9 Q)

(/(&7& (&$++*% 9 )

),/0& (&4%+- 9 Q)

),/0& (&4%+. 9 Q)

),/0& (&43*= 9 Q)

),/0& (&43-= 9 Q)

(/(&7& (&$+0*% 9 )

),/0& (&:)-%% 9 Q)

(/(&7& (&-9)+= 9 Q)

(/(&7& (&-9)+= 9 Q)

(/(&7& (&$-0% 9 )

0(&+$1,&$/3$576

$12'(/($' =78=$($

%$&.&29(5 7.8(

&57 $(&);

&$%,1(7 7.<(

&57),;,1*6&5(: 93

'(*$866&2,/ 7/.(

(3&% 713((%%

)%7 =7)/$

)2&86/($'$66< 7;)-7)%;**

02'(//$%(/ 7%0(

<3&% 713(<$+

0,6&(//$1(286&20321(176

),;&/,3

287(5&$5721 73&(

723&86+21 73'(

%27720&6+,21 73'(

7+(50,6725'

&5762&.(76 7-6&

,16758&7,21%22.6

23(5$7,1*,16758&7,216 74%(01

23(5$7,1*,16758&7,216 74%(34

,&V

5*%$03/,),(5,& 7'$-)

9(57,&$/287387,& /$1

82&,& 7'$96

(:&255(&7,21,& 7($$

95(*8/$725,& $1/

(5525$0/,),(5,& 6(1/)

((520,& ;3.&3

',2'(6

',2'(' 07=-7&

',2'(' (8

',2'(' 79658$0/)%

',2'(' 79658$0/)%

',2'(' (5'/

',2'(' 58/)$

',2'(' (8

',2'(' %='&

3+272&283/(5' 7/3*5/)

',2'(' 0$7$

',2'(' 0$7$

',2'(' 07=-7&

',2'(' 0$7$

',2'(' 0$07$

',2'(' 0$

',2'(' $89

',2'(' 07=-7'

',2'(' 07=-7'

',2'(' 0$7$

',2'(' 79658$0/)$

',2'(' 07=-7$

75$16,67256

75$16,67254 %&%

75$16,67254 %8$)5%

75$16,67254 %&%

75$16,67254 %&%

75$16,67254 %&%

75$16,67254 %&%

75$16,67254 6./%

75$16,67254 %&%

75$16)250(56

75$16)25(57 $

&2,/6

&2,/- (;&(/6$7

&2,// (/+/

&2,// (/&'(

&2,// (/&%/

&2,// (/&'(

5(6,67256

60&$5%-6( (5-*(<5 :

60&$5%-<$. (5-*(<5 :

0(7$/5 (5*6-6 :

60&$5%5 (5-*(<- : .

60&$5%5 (5-*(<- :

&$5%215 (5'67- :

&$5%215 (5'67- :

&$5%215 (5'67-5 : 5

&$5%215 (5'67-5 : 5

&$5%215 (5'67-5 : 5

0(7$/5 (5*6- : .

&$5%215 (5'7- : .

5(6,67255 (54$%-356 :

)86,%/(5 (54$- :

5(6,67255 (5'79 :

60&$5%5 (5-*(<- : .

5(6,67255 (5'67- : .

60&$5%5 (5-*(<- : .

60&$5%5 (5-*(<- : .

60&$5%5 (5-*(<- : .

60&$5%5 (5-*(<- : .

60&$5%5 (5-*(<- : .

&$5%215 (5'67- :

'HVFULSWLRQ&FW5HI 3DUWV1XPEHU 'HVFULSWLRQ&FW5HI 3DUWV1XPEHU

60&$5%5 (5-*(<- : .

60&$5%5 (5-*(<- : .

60&$5%5 (5-*(<- : .

60&$5%5 (5-*(<- : .

60&$5%5 (5-*(<- : .

60&$5%5 (5-*(<- : .

60&$5%5 (5-*(<- :

0(7$/5 (5*6- :

60&$5%5 (5-*(<- :

60&$5%5 (5-*(<- : .

60&$5%5 (5-*(<- : .

60&$5%5 (5-*(<- : .

60&$5%5 (5-*(<- : .

60&$5%5 (5-*(<- : .

60&$5%5 (5-*(<- : .

&$5%215 (5'67- : .

60&$5%5 (5-*(<- :

60&$5%5 (5-*(<- : .

)86,%/(5 (54+-5 : 5

60&$5%5 (5-*(<- :

5(6,67255 (5*6- : .

60&$5%5 (5-*(<- : .

5(6,67255 (5*)-+ :

:281'5 (5:3.5 : 5

&$5%215 (5'67- : .

60&$5%5 (5-*(<- : .

60&$5%5 (5-*(<- : .

60&$5%5 (5-*(<- : .

&$3$&,7256

(/(&7& (&-9)+= 9 Q)

60&$3& (&89+=); 9 Q)

&(5$0,&& (&.&'- .9 Q)

60&$3& (&89+.%; 9 S)

60&$3& (&89+-&; 9 S)

(/(&7& (&$&05% 9 )

),/0& (&:+-9% 9 Q)

(/(&7& (&$*+*5% 9 Q)

&(5$0,&& (&.&'- .9 S)

&(5$0,&& (&.&+- 9 Q)

(/(&7& (&-<%+. 9 Q)

60&$3& (&89+-&; 9 S)

60&$3& (&89+-&; 9 S)

60&$3& (&89+-&; 9 S)

60&$3& (&-<%+. 9 Q)

(/(&7& (&$+0*% 9 )

(/(&7& (&-9)+= 9 Q)

(/(&7& (&$++*% 9 )

),/0& (&4%+- 9 Q)

),/0& (&4%+. 9 Q)

),/0& (&43*= 9 Q)

),/0& (&43-= 9 Q)

(/(&7& (&$+0*% 9 )

),/0& (&:)-%% 9 Q)

(/(&7& (&-9)+= 9 Q)

(/(&7& (&-9)+= 9 Q)

(/(&7& (&$-0% 9 )

60&$3& (&89+-&; 9 S)

TX-28CK1P, TX-25CK1P, TX-21CK1P

(Z8 CHASSIS)

NOTE3. RESISTOR

All resistors are carbon ¼W resistor, unless marUnit of resistance is OHM (Ω) (k=1,000, M=1,000

4. CAPACITORSAll capacitors are ceramic 50V unless marked otUnit of capacitance is µF unless otherwise stated

5. COILUnit of inductance is µH, unless otherwise stated

6. TEST POINTTest Point Position

7. EARTH SYMBOL

Chassis Earth (Cold)

Line Earth (Hot)

8. VOLTAGE MEASUREMENTVoltage is measured by a d.c. voltmeter.Measurement conditions are as follows:Power source a.c. 220V-240V, 50HzReceiving Signal Colour Bar signal (RF)All customer controls Maximum position

9.

Indicates the Video signal path

Indicates the Audio signal path

These schematic diagrams are the latest at time of pr

REMARKSa. Do not touch the hot part, or the hot and cold par

b. Do not short circuit the hot and cold circuits as ec. Do not connect an instrument, such as an oscillo

fuse failure. Connect the earth of the instrumentsd. Make sure to disconnect the power plug before r

NOTE1. The Power Supply Circuit contains a circuit area,

The circuit is defined by HOT and COLD indicatioCOLD.

IMPOR NT SAFETY NOTICEComponents identified byimportant for safety. Wheonly manufacturers' spec

TA

ked otherwise.,000)

herwise..

.

inting and are subject to change without notice.

ts at the same time, as you are liable to a shock hazard.

lectrical components may be damaged.scope, to the hot and cold circuits simultaneously as this may cause to the earth connection of the circuit being measured.emoving the chassis.

which uses a separate power supply to isolate the earth connection. ns in the schematic diagram. All circuits, except the Power Circuit, are

mark have special characteristicsn replacing any of these components, useified parts.

20