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JVC InteriArt AV-28H40SU, Service Manual

The JVC InteriArt AV-28H40SU is a high-quality television that offers exceptional visual clarity and immersive audio experience. To help you make the most of your TV, we provide a comprehensive Instructions Manual that you can conveniently download for free from our website. Unlock the full potential of your entertainment with an easy-to-follow manual guiding you through every feature.

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1-6 (No.YA063)

SECTION 2

SPECIFIC SERVICE INSTRUCTIONS

2.1

FEATURES

• New chassis design enable use of an interactive on screen

control.

• The TELETEXT SYSTEM has a built-in FASTEXT (UK

system), TOP (German system) and WST (world standard
system) system.

• Because this TV unit corresponds to multiplex broadcast,

users can enjoy music programs and sporting events with live
realism. In addition, BILINGUAL programs can be heard in
their original language.

• Users can make VCR dubbing of picture and sound by

controlling the AV selector to select an optional source at the
EXT-2 output shown in figure.

2.2

21-pin Euro connector (SCART) : EXT-1/EXT-2/EXT-3

(P-P= Peak to Peak, B-W= Blanking to white peak)

2.3 MAIN DIFFERENCE LIST

Pin No.

Signal designation

Matching value

EXT-1

EXT-2

EXT-3

1

AUDIO R output

500mV(rms) (Nominal), Low impedance

Used (TV OUT)

Used (LINE OUT)

Not used

2

AUDIO R input

500mV(rms) (Nominal), High impedance

Used (R1)

Used (R2)

Used (R3)

3

AUDIO L output

500mV(rms) (Nominal), Low impedance

Used (TV OUT)

Used (LINE OUT)

Not used

4

AUDIO GND

Used

Used

Used

5

GND  (B)

Used

Used

Used

6

AUDIO L input

500mV(rms) (Nominal), High impedance

Used (L1)

Used (L2)

Used (L3)

7

B input

700mV

(B-W)

, 75

Ω

Used

Used

Not used

8

FUNCTION SW

(SLOW SW)

Low : 0V-3V

High : 8V-12V, High impedance

Used

Used

Used

9

GND  (G)

Used

Used

Used

10

SCL / T-V LINK

Not used 

Used

(SCL2 / TV-LINK)

Not used

11

G input

700mV

(B-W)

, 75

Ω

Used

Used

Not used

12

SDA

Not used 

Used (SDA2)

Not used

13

GND (R)

Used

Used

Used

14

GND (YS)

Used

Not used

Not used

15

R / C input

R : 700mV

(B-W)

, 75

Ω

 

C : 300mV

(P-P)

, 75

Ω

Used (R)

Used (C2/R)

Used (C3)

16

Ys input (FAST SW)

Low : 0V-0.4V, High : 1V-3V, 75

Ω

Used

Used

Not used

17

GND (VIDEO output)

Used

Used

Used

18

GND (VIDEO input)

Used

Used

Used

19

VIDEO output

1V

(P-P)

 (Negative sync), 75

Ω

Used (TV OUT)

Used (LINE OUT)

Not used

20

VIDEO / Y input

1V

(P-P)

 (Negative sync), 75

Ω

Used

Used

Used

21

COMMON GND

Used

Used

Used

Item

AV-28H4BU

AV-28H4SU

AV-28H40SU

AV-28H77SK

Dimensions ( W 

×

 H 

×

 D ) 76.2cm 

×

 52.8cm 

×

 49.3cm

←

85.4cm 

×

 50.8cm 

×

 49.0cm 

←

Mass

39.0kg

←

←

←

Cabinet colour

Black

Silver

←

←

Power cord

EU type(2-pin)

←

←

UK type(3-pin)

Colour system

PAL, SECAM

←

←

PAL

RF system

CCIR (B/G, D/K, I, L)

←

←

CCIR (I)

Item

AV-32H4BU

AV-32H4SU

AV-32H40SU

AV-32H47SU

AV-32H77SK

Dimensions ( W 

×

 H 

×

 D ) 86.4cm 

×

 58.7cm 

×

 55.0cm 

←

94.6cm 

×

 56.1cm 

×

 54.7cm 

94.8cm 

×

 56.2cm 

×

 55.0cm 

94.6cm 

×

 56.1cm 

×

 54.7cm 

Mass

53.0kg

←

←

52.5kg

53.0kg

Cabinet colour

Black

Silver

←

←

←

Power cord

EU type(2-pin)

←

←

←

UK type(3-pin)

Colour system

PAL, SECAM

←

←

←

PAL

RF system

CCIR (B/G, D/K, I, L)

←

←

←

CCIR (I)

20 18 16

14 12 10

8

6

4

2

21 19 17

15 13 11

9

7

5

3

1

[Pin assignment]

Summary of Contents for InteriArt AV-28H40SU

Page 1: ...28H77SK AV 32H4BU AV 32H4SU AV 32H40SU AV 32H47SU AV 32H77SK TABLE OF CONTENTS 1 PRECAUTION 1 4 2 SPECIFIC SERVICE INSTRUCTIONS 1 6 3 DISASSEMBLY 1 8 4 ADJUSTMENT 1 17 5 TROUBLE SHOOTING 1 35 BASIC CHASSIS ML2 1 2 3 4 5 6 7 8 9 0 P AV TV OK MENU P TV AV 28H4SU AV 28H4BU AV 32H4SU AV 32H4BU AV 28H40SU AV 28H77SK AV 32H40SU AV 32H77SK AV 32H47SU ...

Page 2: ...I SIF 33 4MHz 5 5MHz B G 32 9MHz 6 0MHz I 32 4MHz 6 5MHz L D K 32 9MHz 6 0MHz I Colour Sub Carrier Frequency PAL 4 43MHz SECAM 4 40625MHz 4 25MHz NTSC 3 58MHz 4 43MHz Power Input AC220V AC240V 50Hz Power Consumption 120W standby 2 5W Aerial Input Terminal 75Ω unbalanced coaxial Picture Tube Visible size 66cm Measured diagonally H 58 3cm V 33 0cm High Voltage 31 0kV 1kV 1 5kV at zero beam current S...

Page 3: ...8 9MHz B G D K I L 38 9MHz I SIF 33 4MHz 5 5MHz B G 32 9MHz 6 0MHz I 32 4MHz 6 5MHz L D K 32 9MHz 6 0MHz I Colour Sub Carrier Fre quency PAL 4 43MHz SECAM 4 40625MHz 4 25MHz NTSC 3 58MHz 4 43MHz Power Input AC220V AC240V 50Hz Power Consumption 130W standby 2 5W Aerial Input Terminal 75Ω unbalanced coaxial Picture Tube Visible size 76cm Measured diagonally H 67 4cm V 38 4cm High Voltage 31 0kV 1kV ...

Page 4: ...eplacements or alternatives approved by the manufacturer of the complete product 7 Do not check high voltage by drawing an arc Use a high voltage meter or a high voltage probe with a VTVM Discharge the picture tube before attempting meter connection by connecting a clip lead to the ground frame and connecting the other end of the lead through a 10kΩ 2W resistor to the anode button 8 When service i...

Page 5: ...haracteristics are identified in the Parts List of Service Manual Electrical components having such features are identified by shading on the schematics and by on the Parts List in the Service Manual The use of a substitute replacement which does not have the same safety characteristics as the recommended replacement part shown in the Parts List of Service Manual may cause shock fire or other haza...

Page 6: ...7 B input 700mV B W 75Ω Used Used Not used 8 FUNCTION SW SLOW SW Low 0V 3V High 8V 12V High impedance Used Used Used 9 GND G Used Used Used 10 SCL T V LINK Not used Used SCL2 TV LINK Not used 11 G input 700mV B W 75Ω Used Used Not used 12 SDA Not used Used SDA2 Not used 13 GND R Used Used Used 14 GND YS Used Not used Not used 15 R C input R 700mV B W 75Ω C 300mV P P 75Ω Used R Used C2 R Used C3 16...

Page 7: ...ess bit for PP RAM SD RAM 94 P5 15 I Headphone connection detection Connect H 31 VSS33 GND 95 TRIG_IN Not used 32 VDD33 i 3 3V 96 TRIG_OUT Not used 33 A4 O Address bit for PP RAM SD RAM 97 P6 2 O Notifies bus free state Stop mode H 34 A3 O Address bit for PP RAM SD RAM 98 P6 3 O Clock for inter IC control bus 35 A2 O Address bit for PP RAM SD RAM 99 P6 4 I O Data for inter IC control bus 36 A1 O A...

Page 8: ...nnectors etc 3 1 6 REMOVING THE AV TERMINAL BOARD Remove the REAR COVER 1 Remove the 3 screws F as shown in the Fig 3 2 Remove the 2 claws G under the CHASSIS as shown in Fig 2 3 Remove the AV TERMINAL BOARD slightly in the direction of arrow H as shown in Fig 2 3 1 7 REMOVING THE SPEAKER GRIL Remove the REAR COVER 1 Remove the 8 screws J as show in the Fig 3 2 Remove the SPEAKER GRIL 3 1 8 REMOVI...

Page 9: ...R GRIL FRONT CABINET CRT SOCKET PWB FRONT CONTROL PWB POWER DEF PWB CONTROL BASE SIDE CONTROL JACK ASS Y E F J D C A C B REAR COVER CHASSIS BASE 100Hz PWB AV TERMINAL BOARD CLAW CLAW MAIN PWB AV JACK PWB POWER CORD CN810K CN810F ...

Page 10: ... SPEAKER Remove the REAR COVER 1 Remove the 2 screws E and remove the SPEAKER ADAPTER as shown in Fig 3 NOTE When removing the 2 screws E of the speaker holder remove the lower side screw first and then remove the upper one 2 Remove the 4 screws F attaching the SPEAKER 3 Follow the same steps when removing the other hand SPEAKER 3 2 7 REMOVING THE AV TERMINAL BOARD Remove the REAR COVER 1 Remove t...

Page 11: ... CABINET CRT SOCKET PWB SPEAKER ADAPTER SPEAKER x 2 x 3 x 3 x 13 FRONT CONTROL PWB POWER DEF PWB CHASSIS BASE MICOM PWB AV SW PWB MAIN PWB POWER CORD AV TERMINAL BOARD REAR COVER SIDE CONTROL JACK ASS Y CLAW CLAW B G D E x 4 F A ...

Page 12: ...ing steps The CRT change table should preferably be smaller that the CRT surface and its height be about 35cm Fig 4 Fig 5 Fig 6 COATING OF SILICON GREASE FOR ELECTRICAL INSULATION ON THE CRT ANODE CAP SECTION Subsequent to replacement of the CRT and HV transformer or repair of the anode cap etc by dismounting them be sure to coat silicon grease for electrical insulation as shown in Fig 7 Wipe arou...

Page 13: ...orrect val ue with the FUNCTION key 5 Press the MENU key to memorize the setting value 6 Press the INFORMATION key twice and return to the normal screen 5 Receiving channel setting Refer to the OPERATING INSTRUCTIONS and set the receive channels Channels Preset as described 6 User settings Check the user setting items according to the given in page later Where these do not agree refer to the OPERA...

Page 14: ...ARP COLOUR HUE Refer to 5 VSM PRESET COLOUR TEMP COOL Setting item Setting position DIGITAL VNR AUTO DigiPure Pro AUTO COLOUR SYSTEM TV According to preset CH EXT AUTO 4 3 AUTO ASPECT PANORAMIC PICTURE TILT 32 model MIDDLE Setting item Setting position STEREO I II Stereo sound BASS Centre TREBLE Centre BALANCE Centre HYPER SOUND OFF Setting item Setting position ID BLANK S IN BLANK DUBBING EXT 1 E...

Page 15: ... 1 RGB BLK 2 CUTOFF R 3 CUTOFF G 4 CUTOFF B 5 WDR R 6 WDR G 7 WDR B 8 BRIGHT 9 CONTRAST 10 COLOUR 11 HUE 12 SHARP 13 SC ADJ 14 SIDE P L 15 SIDE P R 6 STATUS Do not adjust 1 SOFT 2 TELETEXT 3 ASPECT 4 PROTECT 5 FLASH 3 AUDIO Do not adjust 1 ERR LIMIT 2 A2 ID THR 3 SYSTEM 9 SHIPPING Do not adjust ON OFF 4 DEF 1 V SHIFT 2 V SIZE 3 H CENT 4 H SIZE 5 TRAPEZ 6 EW PIN 7 COR UP 8 COR LO 9 COR UP S 10 COR ...

Page 16: ...he tweezers and remove the chip part Transistors diodes variable resistors etc 1 Apply extra solder to each lead 2 As shown in the figure push the part with tweezers and alternately melt the solder at each lead Shift and remove the chip part NOTE After removing the part remove remaining solder from the pattern 2 How to install Chip parts Resistors capacitors etc 1 Apply solder to the pattern as in...

Page 17: ...ustment 4 2 PRESET SETTING BEFORE ADJUSTMENT Unless otherwise specified in the adjustment items preset the following functions with the REMOTE CONTROL UNIT 4 3 MEASURING INSTRUMENT AND FIXTURES 1 DC voltmeter or digital voltmeter 2 Oscilloscope 3 Signal generator Pattern generator PAL SECAM NTSC 4 Remote control unit 4 4 ADJUSTMENT ITEMS CHECK ITEM B1 POWERSUPPLY check HIGH VOLTAGE check IF VCO ch...

Page 18: ...IDE CONTROL PWB TOP SPEAKER POWER SW FRONT POWER LED D8801 IC8851 F8901 W PW POWER CORD FRONT MAIN PWB POWER DEF PWB FRONT CONTROL PWB SR SL HV K B B F G X R IC701 W CN003 CN004 CN005 T551 HVT 1 5 1 TP 91 B1 2 NC 3 X ray1 4 X ray2 5 TP E TUNER AV JACK PWB MICOM 100Hz PWB F K CN001 CN002 FOCUS1 FOCUS2 SCREEN 28 MODEL 32 MODEL FOCUS1 SCREEN ...

Page 19: ... W POWER CORD B TOP R G VM CRT SOCKET PWB TP E TP 47B E1 SOLDER SIDE SIDE CONTROL PWB FRONT CONTROL PWB SPEAKER MAIN PWB POWER DEF PWB SR SL HV K B F G X R IC701 W CN003 CN004 CN005 T551 HVT 1 5 1 TP 91 B1 2 NC 3 X ray1 4 X ray2 5 TP E TUNER AV JACK PWB MICOM 100Hz PWB CN001 CN002 28 MODEL 32 MODEL FOCUS1 SCREEN FOCUS1 FOCUS2 SCREEN ...

Page 20: ...es of the VIDEO circuit 3 AUDIO This mode adjusts the setting values of the MULTI SOUND circuit Do not adjust 4 DEF This mode adjusts the setting values of the DEFLECTION circuit 5 VSM PRESET This mode adjusts the setting values of COOL NORMAL and WARM VSM Video Status Memory 6 STATUS This mode is shows the monitor of SOFT TELETEXT ASPECT PROTECT FLASH Do not adjust 9 SHIPPING OFF This mode is set...

Page 21: ...TUS 7 8 SURROUND 9 SHIPPING OFF 0 BUS FREE 1 9 SELECT EXIT i AUDIO 3 AUDIO 1 ERR LIMIT 0010 C_AD_BITS ERROR LIMIT STORE i EXIT 1 IF VCO BRIGHT STD SOFT 5 VSM PRESET VSM PRESET BRIGHT 1 CONT 1 SOFT STORE i EXIT 1 CONT 2 BRIGHT 3 SHARP 4 COLOUR 5 HUE 1 WDR R 2 WDR G 3 WDR B Do not move Do not adjust PICTURE MODE COOL NORMAL WARM COLOR TEMP 1 RGB BLK 2 CUT OFF R 3 CUT OFF G 4 CUT OFF B 5 WDR R 6 WDR ...

Page 22: ... 0000 0255 0165 0165 0165 6 WDR G 0000 0255 0135 0135 0135 7 WDR B 0000 0255 0150 0150 0150 8 BRIGHT 128 0127 030 030 030 9 CONTRAST 0000 0063 0040 0040 0040 Setting item Variable range Initial setting value PAL SECAM NTSC 3 58 NTSC 4 43 10 COLOUR 0000 0063 0036 0031 0025 0000 11 HUE 064 0063 0002 0000 Setting item Variable range Initial setting value PAL SECAM NTSC TV EXT TV EXT TV EXT 12 SHARP 0...

Page 23: ... 0000 0000 0000 0000 0005 0000 2 V SIZE 064 0063 033 0000 0005 0000 0017 0000 3 H CENT 128 0127 014 0000 0000 0000 0000 0000 4 H SIZE 128 0127 0000 0000 0000 0000 0000 0000 5 TRAPEZ 064 0064 011 0000 0000 0000 0000 0000 6 EW PIN 128 0127 035 0000 0000 0000 0000 0000 7 COR UP 064 0064 0000 0000 0000 0000 0000 0000 8 COR LO 064 0064 0000 0000 0000 0000 0010 0000 9 COR UP S 064 0064 0000 0000 0000 00...

Page 24: ...D 2 V C 1 RGB BLK 1 Receive the any broadcast 2 Select 2 V C from the SERVICE MENU 3 Select 1 RGB BLK 4 Press the FUNCTION key to find the cut off screen Black screen 5 Connect a HV voltmeter to CRT ANODE and chassis GND A ground side is connected previously 6 Make sure that the voltage is DC 31 0kV 1kV 1 5kV 7 Press the FUNCTION key to return to service menu NOTE When removing a prove an anode si...

Page 25: ...part horizontal line may become uniform at the line centre and its periphery Fig 1 5 Make sure that when the screen is darkened the lines remain in good focus Fig 1 FOCUS 28 MODELS Signal generator FOCUS VR In HVT 1 Receive the cross hatch signal 2 Set the ZOOM mode to FULL 3 While looking at the screen adjust the FOCUS VR to the vertical and horizontal lines will be clear and infine detail Fig 1 ...

Page 26: ...ferent from the initial setting values To switch aspect modes use the ZOOM key of the remote controller Item Measuring instrument Test point Adjustment part Description V POSITION Signal generator Remote control unit 4 DEF 1 V SHIFT 1 Receive the circle pattern signal of vertical frequency 50Hz PAL SECAM 2 Set the ZOOM mode to FULL 3 Select 4 DEF from the SERVICE MENU 4 Select 1 V SHIFT 5 Set the ...

Page 27: ...sure that the horizontal screen size of the picture size is in the bellow table 7 Make sure that the horizontal screen size of the each ZOOM mode is in the below table 8 Press the MENU key and memorize the set value SIDE PIN Signal generator Remote control unit 4 DEF 6 EW PIN 1 Receive the cross hatch signal 2 Set the ZOOM mode to FULL 3 Select 4 DEF from the SERVICE MENU 4 Select 6 EW PIN 5 Set t...

Page 28: ... at the upper corner 7 Select 8 COR LO 8 Set the initial setting value of 8 COR LO 9 Adjust to bring the straight line at the low corner 10 Press the MENU key and memorize the set value 11 If the extreame upper lower corners are a little pin or barrel chose 9 COR UP S or 10 COR LO S and adjust 12 Press the MENU key and memorize the set value ANGLE Signal generator Remote control unit 4 DEF 11 ANGL...

Page 29: ...nerator Remote control unit 4 DEF 13 V S CR 14 V LIN When the vertical linearity has been deteriorated remarkably perform the following steps 1 Receive the cross hatch signal 2 Set the ZOOM mode to FULL 3 Select 4 DEF from the SERVICE MENU 4 Select 14 V LIN 5 Set the initial setting value of 14 V LIN 6 Select 13 V S CR 7 Set the initial setting value of 13 V S CR 8 Adjust 14 V LIN and 13 V S CR so...

Page 30: ...e the contrast and brightness from low light to high light and check that the tracking of the white balance is good SUB BRIGHT Remote control unit 2 V C 8 BRIGHT 1 Receive the any broadcast 2 Set the ZOOM mode to FULL 3 Set the PICTURE MODE to STD 4 Select 2 V C from the SERVICE MENU 5 Select 8 BRIGHT 6 Set the initial setting value of 8 BRIGHT 7 If the brightness is not the best with the initial ...

Page 31: ...e best with the initial set value make fine adjustment until you get the best colour 8 Press the MENU key and memorize the set value SECAM COLOUR 1 Receive the SECAM broadcast 2 Make fine adjustment of SECAM COLOUR in the same manner as for above NTSC 3 58 COLOUR 1 Input the NTSC 3 58MHz signal from the EXT terminal 2 Make similar fine adjustment of NTSC 3 58 COLOUR in the same manner as for above...

Page 32: ...just SECAM COLOUR and bring the value of A in the illustration to the values as shown given billow Voltage difference between white W and blue B 4 Press the MENU key and memorize the set value NTSC 3 58 COLOUR 1 Input the NTSC 3 58MHz signal full field colour bar with 75 white from the EXT terminal 2 Set the initial setting value of NTSC 3 58 COLOUR 3 Adjust NTSC 3 58 COLOUR and bring the value of...

Page 33: ...Remote control unit TP 47B TP E CRT SOCKET PWB 2 V C 11 HUE Method of adjustment using measuring instrument NTSC 3 58 HUE 1 Input the NTSC 3 58MHz signal full field colour bar with 75 white from the EXT terminal 2 Set the ZOOM mode to FULL 3 Set the PICTURE MODE to STD 4 Select 2 V C from the SERVICE MENU 5 Select 11 HUE 6 Set the initial setting value of 11 HUE 7 Connect the oscilloscope between ...

Page 34: ...e set values of 1 CONT to 5 HUE to the values shown in the 5 VSM PRESET 5 Press the MENU key and set the PICTURE MODE to STD 6 Make similar adjustment as in 4 above 7 Press the MENU key and set the PICTURE MODE to SOFT 8 Make similar adjustment as in 4 above 9 Press the MENU key and set the COLOUR TEMP to COOL 10 Adjust the FUNCTION UP DOWN and key to bring the set values of 1 WDR R to 3 WDR B to ...

Page 35: ... No YA063 1 35 SECTION 5 TROUBLE SHOOTING This service manual does not describe TROUBLE SHOOTING ...

Page 36: ... No YA063 AV MULTIMEDIA COMPANY VIDEO DISPLAY CATEGORY 12 3 chome Moriya cho kanagawa ku Yokohama kanagawa prefecture 221 8528 Japan VICTOR COMPANY OF JAPAN LIMITED WPC Printed in Japan ...

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