JVC AV-32P903/Y, AV-36P903/Y Service Manual

SERVICE MANUAL

COLOR TELEVISION

AV-36P903 AV-32P903

BASIC CHASSIS

AV-36P903 AV-32P903

/Y

SBⅡⅡⅡⅡ

SPECIFICATIONS

Items Contents

Dimensions (W××××H××××D)

Mass

TV RF System CCIR(M)

Color Sound System NTSC / BTSC System (Multi Channel Sound)

TV Receiving Channels and Frequency

VL Band

VH Band

UHF Band

CATV Receiving Channels and Frequency

Low Band

High Band

Mid Band

Super Band

Hyper Band

Ultra Band

Sub Mid Band

TV/CATV Total Channel 181 Channels

Antenna terminal 75Ω(VHF/UHF) Terminal, F-Type Connector

Intermediate Frequency

Video IF Carrier

Sound IF Carrier

Color Sub Carrier 3.58MHz

Power Input

Power Consumption

Picture Tube

High Voltage

Speaker

Audio Power Output

External Input

Video

Audio (R/L)

S-Video

component

Audio Output Variable

Fixed

Digital- In DVI 25pin connector Digital-In terminal is not compatible with computer signal.

38-1/8”×30-3/8”×24-1/8” inch (967mm×770mm×610mm) [AV-36P903 34-5/8”×27-5/8”×22-1/4” inch (877mm×699mm×565mm) [AV-32P903

187.0 Ibs (85.0 kg) [AV-36P903

145.2 Ibs (66.0 kg) [AV-32P903

(02～06) 54MHz～88MHz (07～13) 174MHz～216MHz (14～69) 470MHz～806MHz

(02～06, A-8) by (02～06&01) (07～13) by (07～13) (A～1) by (14～22) (J～W) by (23～36) (W+1～W +28) by (37～64) (W+29～W +84) by (65～125) (A8, A4～A1) by (01, 96～99)

45.75MHz

41.25MH z (4.5MHz)

120V AC, 60Hz

215W

36” (90cm)/32”(80cm) Measured Diagonally 32kV±1.0kV (at zero beam current) 2”×4-3/4” (5cm×12cm) Oval type×2

5W +5W

1Vp-p, 75Ω

500mVrms ( -4dBs ), High Impedance Y: 1Vp-p Positive (negative sync provided, when terminated with 75Ω)

p-p

C: 0.286V

/ PR : 0.7Vp-p, 75Ω

P

B

More then 0～1000mVrms (+2.2dBs), LOW Impedance(400Hz when modulated 100%)

500mVrms(-4dBs) Low Impedance (400Hz when modulated 100%)

(burst signal, when terminat ed with 75Ω)

/Y]

(54MHz～804MH z)

/Y

]

Remote Control Unit RM-C324G (AA/R6/UM-3 battery×2)

Design & specifications are subject to change without notice.

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SAFETY PRECAUTIONS

V-36P903 V-32P903

1. The design of this product contains special hardware, many circuits and components specially for s afety purposes. For continued protection, no changes should be made to the original design unless authorized in writing by the manufacturer. Replacement parts must be identical to those used in the original circuits. Servic e should be performed by qualified personnel only.

2. Alterations of the design or circuitry of the products should not be made. Any design alterations or additions will void the manufacturer's warranty and will further relieve the manufacturer of r esponsibility for personal injury or property damage resulting therefrom.

3. Many electr ical and mechanical parts in the products have special safety-related characteristics. These characteristics are often not evident from visual inspection nor can the protection afforded by them necess arily be obtained by using replacement c omponents rated for higher voltage, wattage, etc. Replacement parts which have these special safety characteristics are identified in the parts list of Service manual.

Electrical components having such featur es are ident ified by shading on the schematics and by (!!!!) on the parts list in 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 Ser vice man ual may c aus e s hoc k, fire, or oth er haz ar ds.

4. Use isolation transformer when hot chassis. The chassis and any sub-chassis c ontained in some products are connect ed to one sid e of the AC power lin e. An isolati on transformer of adequate capacity should be inserted between the product and the AC power supply point while performing any service on s ome products when the HOT chassis is exposed.

5. Don't short between the LIVE side ground and ISOLATED

(NEUTRAL) side ground or EARTH side ground when repairing.

Some model's power circuit is partly different in the GND. The differenc e of the GND is shown by the LIVE : (") side GND, the ISOLATED(NEUTRAL) : (#) side GND and EARTH : ($) side GND. Don't short between the LIVE side GND and ISOLATED(NEUTRAL) side GND or EARTH side GND and never measure with a measuring appar atus (osc illosc ope etc.) the LIVE side GND and ISOLATED(NEUTRAL) side GND or EARTH side GND at the same time. If above note will not be kept, a fuse or any parts will be br oken.

6. If any repair has been made to the chassis, it is recommended that the B1 setting should be checked or adjusted (See ADJUSTMENT OF B1 POWER SUPPLY).

7. The high voltage applied to the picture tube must conform with that specified in Service manual. Excessive high voltage can cause an increase in X-Ray emission, arcing and possible component damage, therefore operation under excessive high voltage conditions should be kept to a minimum, or should be prevented. If severe arcing occurs, remove the AC power immediately and det ermine the cause by visual inspection (incorrect installation, cr acked or melted high voltage harness, poor soldering, etc.). To maintain the proper minimum level of soft X-Ray emission, components in the high voltage circuitry including the picture tube must be the exact replacements or alternatives approved by the manufacturer of the c omplet e product.

8. 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.

9. When service is r equired, obser ve the original lead dr ess. Extra precaution should be given to assure correct lead dress in the high voltage circuit area. Where a short circuit has occurred, those c omponents that indicate evidence of overheating should be replaced. Always use the manufacturer's replacement c omponents.

10. Isolation Check

(Safety for Electrical Shock Hazard)

After re-assembling the product, always perform an isolation check on the expos ed metal parts of the c abinet (antenna terminals, video/audio input and output terminals, Control knobs, metal cabinet, scr ewheads, earphone jack, control shafts, etc.) to be sure the product is s afe to operate without danger of electrical shock.

(1) Dielectr ic Strength Test

The isolation between the AC primary circuit and all metal parts exposed to the user, particularly any exposed metal part having a return path to the chassis should withstand a voltage of 1100V AC (r.m.s.) for a period of one second.

(. . . . W ithstand a voltage of 1100V AC (r.m.s.) to an appliance

rated up to 120V, and 3000V AC (r.m.s.) to an appliance rated 200V or more, for a period of one second.) This method of test requires a test equipment not generally fou nd in th e s er vic e trade.

(2) Leakage Current Check

Plug the AC line cord directly into the AC outlet (do not use a line isolation transformer during this check.). Using a "Leakage Current Tester", measure the leakage current from each exposed metal part of the cabinet, particularly any exposed metal part having a return path to the chassis, to a known good earth gr ound (water pipe, etc.). Any leakage current must not exceed 0.5mA AC (r.m.s.). However, in tropical area, this must not exceed 0.2mA AC (r.m.s.).

"""" Alternate Check Method

Plug the AC line cord directly into the AC outlet (do not use a line isolation transformer during this check.). Use an AC voltmeter having 1000 ohms per volt or more sensitivity in the following manner. Connect a 1500Ω 10W resistor paralleled by a 0.15μ F AC-type capacitor between an exposed metal part and a known good earth ground (water pipe, etc.). Measure the AC voltage across the resistor with the AC voltmeter. Move the resistor connection to each exposed metal part, particularly any exposed metal part having a return path to the chassis, and measure the AC voltage across the resistor. Now, reverse the plug in the AC outlet and repeat each measurement. Any voltage measur ed must not exceed 0.75V AC (r.m.s.). This corresponds to 0.5mA AC (r.m.s.). However, in tropical area, this must not exceed 0.3V AC (r.m.s.). This corresponds to 0.2mA AC (r.m.s.).

AC VOLTMETER (HAVING 1000

GOOD EARTH GROUND

11. High voltage hold down circuit check. After repair of the high voltage hold down circuit, this circuit shall be checked to operate c orrectly. See item "How to check the high voltage hold down circuit".

This mark shows a fast operating fuse, the letters indicated below show the rating.

0.15μF AC-TYPE

1500

10W

Ω

OR MORE SENSITIVITY)

PLACE THIS PROBE ON EACH EXPOSED METAL PART

POWER CORD REPLACEMENT W ARNING.

Connecting the white line side of power cord to “WHT” character side.

/V,

Ω

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V-36P903

A

V-32P903

FEATURES

■ Multi screen function

• Dual screen (P&P) Two programs can be seen at once.

• Contents index. A favorable program can be selected from the nine preview PIPs on the screen.

■ Provided with twin tuner / twin mode (16:9&4:3mode).

■ Multifunctional remote control permits picture

adjustment.

■ The CH.GUARD function prevents the specific

channels from being selected, unless the “ID number” is entered.

2

C bus control utilizes single chip ICs.

■ I

■ Adoption of the VIDEO STATUS function.

• The VIDEO STATUS key gives you a choice of 3

picture display settings, including a display of your own preferences. STANDARD DYNAMIC THEATER

■ Digital-In

To receive digital broadcasts. Digital-In will display when the 480p (or 1080i) picture signal in Digital-In is displayed.

■ Natural Cinema

When you watch the movie or animation, press the Natural Cinema to adjust the out line of the images to make thin more sharp.

■ Built-in V-CHIP system.

• This TV is equipped with V-CHIP technology which enables TV parental guidelines and movie guideline controls.

■ Closed-caption broadcasts can be viewed.

■ Built-in MTS (

In addition to mono or stereo sound, an MTS broadcast may also include a Second Audio Program (SAP).

■ Built-in HYPER-SURROUND system & BBE sound

system.

■ S-VIDEO input terminal for taking best advantage

of Super VHS.

■ Digital Comb filter Improves picture quality.

■ Plug-In menu

The plug-In menu comes up automatically when you first turn on the TV after plugging it in.

Multi-channel Television Sound

) system.

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SYSTEM BLOCK DIAGRAM

MAIN PWB

SDA2 SCL2

V-36P903 V-32P903

SUB TUNER (RECEIVER) PWB

MAIN MICROCOMPUTER

IC701

IC703

MEMORY IC

TU101

U / V TUNER

IC501

AV SELECTOR

IC211

HD SYNC

SDA0 SCL0

TU101

U / V TUNER

IC201

MTS & TONE / VOL

CONTROL

IC651

MICOM LATCH

DEF OSC PWB

IC161

DEF CONTROL

IC241

CHROMA

DECODER

IC301

RGB PROCESSOR

IC302

DAC

IC502

MICOM LATCH

IC560

MICOM LATCH

IC212

DEF CONTROL SW

IC151

COMPONENT SW

DIGITAL INPUT

MODULE

I/P MODULE

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V-36P903

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V-32P903

■■■■ MAIN MICON (CPU) FUNCTION

(MIN102H57K)

№№№№

PIN NAME

1 NC

2 /VSYNC

3 LB_PRO

4 NC

5 /RST

6 NC

7 /TEST

8 YS

9 NC

10 NC

11 A_MUTE

12 /HSYNC

13 M_MUTE

14 OSDXI

15 OSDXO

16 NC

17 AC_IN

18 NC

19 /TU_POW

20 VCOI

21 PDO

22 /IP_RESET

23 YM

24 B

25 LED_POW ER

26 G

27 R

28 VREF

29 IP_ERR

30 IREF

31 COMP

32 AVDD

33 CLL

34 VREFLS

35 SUB_CCD

36 NC

37 VSS

38 MAIN_CCD

39 VREFHS

40 CLH

41 VDD

42 LED_DATA

I/O

I/OI/O

OOOO

NC

IIII

V.SYNC IN for OSD

IIII

LOW B Protection

－

NC

IIII

Micon Reset input

OOOO

NC

IIII

+3.3V

OOOO

OSD YS OUT

OOOO

Micon test pin

OOOO

NC

OOOO

TV Sound Muting

IIII

H.sync input for OSD

OOOO

Monitor Out Muting

－

OOOO

NC

IIII

AC 50/60Hz in

OOOO

NC

OOOO

Tuner Power Control

IIII

LPF input

OOOO

LPF output

OOOO

OSD YM out

OOOO

OSD Blue out

OOOO

LED for Power

OOOO

OSD Green Out

OOOO

OSD Red Out

IIII

AMDP pr ogram load det.

IIII

+3.3V

IIII

For Sub CCD

IIII

STD VOL in for Sub CCD

IIII

For Sub CCD

－

NC

IIII

GND

IIII

For main CCD

IIII

STD VOL in for CCD

IIII

For main CCD

OOOO

+3.3V

OOOO

Front control Data

FUNCTION

№№№№

PIN NAME

43 LED_CLOCK

44 LED_ON_TIMER

45 SB01

46 SBD1

47 SBT1

48 INC

49 ECO.RST

50 ROT COIL L

51 ROT COIL R

52 H_BLK

53 SN_ COIL_R

54 SN_ COIL_L

55 NC

56 I2C.STOP

57 TU2_A/D(AFC2)

58 /LOB_POW

59 NC

60 /POWERGOOD

61 /MECA_ON

62 /MAIN_POW

63 NC

64 /B1 POW

65 AFC1

66 X-RAY

67

68 KEY2

69 KEY1

70 SCL1

71 SDA1

72 REMO

73 NC

74 VSS

75 OSC2

76 OSC1

77 VDD

78 SCL0

79 NC

80 SDA0

81 SCL2

82 SDA2

83 NC

84 P MUTE

I/O

I/OI/O

OOOO

IIII

OOOO

Terrestrial Magnetism Sensor

OOOO ↑

OOOO

IIII

OOOO

IIII AV CompulinkⅢInput

IIII

OOOO

－

OOOO

IIII

OOOO

IIII

OOOO

I/O

I/OI/O

IIII

OOOO

IIII

OOOO

IIII

OOOO

I/O

I/OI/O

OOOO

IIII

－

OOOO

FUNCTION

F. LED CLK

LED on timer

Use for

Use for ON board W riting

NC

Eco Rest

Picture rotation

H.BLK

NC

I2C BUS STOP

Tuner2 gain input

LOB power control

Power Condition Check

Machine SW Interrupt

MAIN POWER CONTROL

NC

B1 POWER CONTROL

AFC main in

X-ray detection

Front Key input 2

Front Key input 1

I2C BUS (CLK) for E2PROM

I2C BUS (SDA) for E2PROM

Remocon IN

NC

GND

4MHz OSC

+3.3V

I2C BUS (CLK) for General

NC

I2C BUS (SDA) for General

I2C BUS (CLK) for MTS

I2C BUS (SDA) for MTS

NC

Picture muting

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■■■■ DIGITAL-IN TERMINAL FUNCTIONS

V-36P903 V-32P903

PIN No.

1 RX2- 13 RX3+

2RX2+14 5V

3 GND2/ 4 15 GND

4RX4-16HTPLG

5 RX4+ 17 RX0-

6 SCL 18 RX0+

7 SDA 19 GND0/5

8NC20RX5-

9 RX1- 21 RX5+

10 RX1+ 22 GNDC

11 GND1/3 23 TXC+

12 RX3- 24 TXC-

PIN NAME

PIN No.

25 GND

PIN NAME

PIN ASSIGNMENT

17

18

19

20

21

22

23

24

25

9

10

1

2

11

3

12

4

13

5

6

14

7

8

15

16

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V-36P903

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V-32P903

FUNCTIONS

" FRONT PANEL

① INPUT -4 terminals (S -Video, Video, Audio L/MONO / R)

② MENU button

③ CHANNEL －－－－/＋＋＋＋ button or OPERATE button

④ VOLUME －－－－/＋＋＋＋ button

⑤ SENSOR Remote control

⑥ POWER & ON TIMER lamp

⑦ POWER(Main) button

1 2 3 4 5 6 7

" AV TERMINAL (REAR)

1

2

3

5

6 7

① ANT 75Ω(VHF/UHF) Terminal

② AUDIO OUTPUT (L/R) terminal

③ AUDIO INPUT (L/R) Terminal

④ AV COMPULINKⅢ Jack

⑤ DIGITAL-IN Terminal

⑥ INPUT-2 (Y/P

⑦ INPUT-3 (Y/PB/PR) Terminal (Component Video )

⑧ INPUT-1 Terminal (S-Video / Video /Audio L/R)

⑨ INPUT-2 Terminal (Video/Audio L/R)

⑩ INPUT-3 Terminal (S-Video / Video /Audio L/R)

B/PR)Terminal (Component Video )

4 8 9 10

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" REMOTE CONTROL (RM-C324G)

V-36P903 V-32P903

13

10

11

1 2 3 4

12

5

6

7

8

9

18

21

14

15

16

17

23

19

20

22

1TV / CATV switch 2VCR / DVD switch 316 : 9 MODE Key 4POWER Key 5DISPLAY key 6SLEEP TIMER Key 7VIDEO STATUS Key 8NATURAL CINEMA Key 9THEATER key ASOUND key

BFUNCTIONS Key

(CH +/-, VOL +/- & SERVICE MODE)

CMULTI SCREEN / PIP Key

INDEX / -CHANNEL+ / PIP/MOVE SOURCE / FREEZ / SWAP

DINPUT Key ENUMBERS Key F100+ Key GRETURN+ Key HLIGHT Key IMUTING Key (memory Key) JV-CHIP Key KEXIT / PIP OFF Key LMENU Key

MVCR / DVD Key

For VCR/DVD operation Keys

NEZ SURF Key

Keys

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V-36P903

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CO

CHASSIS C

V-32P903

SPECIFIC SERVICE INSTRUCTIONS

DISASSEMBLY PROCEDURE

REMOVING THE REAR COVER

" Unplug the power supply cord.

1. Remove the 15screws marked !!!! as s hown in Fig.2.

2. Remove the r ear cover toward you. * When reinstalling the rear cover, carefully push it inward after

inserting the chassis into the rear cover gr oove.

REMOVING THE TERMINAL BOARD

" After removing the rear cover.

1. Remove the 5 screws marked """" as shown in Fig.2.

2. When you pull out the TERMINAL BOARD in the direction of

arrow marked #### as shown in Fig.2, it can be removed.

REMOVING THE CHASSIS

" After removing the rear cover.

1. Slightly raise the both sides of the chassis by hand and remove the 2 claws under the both sides of the chassis from the front cabinet.

2. Draw the chassis backward along the rail in the arrow direction marked #### as shown in the Fig.2. (If necessary, take off the wire clamps, connectors etc.)

* W hen conducting a check with power supplied, be sure to

confirm that the CRT earth wire is connected to the CRT SOCKET PWB and MAIN PWB or DEF.POWER PWB.

REMOVING THE CONTROL BASE

" Af ter removing the rear cover and the chassis.

1. While pushing down the claws marked $$$$ as shown in Fig.1.

2. Remove the CONTROL BASE in the arrow direction

marked%&

%&.

%&%&

( If necessary, take off the wire clamps, c onnect ors etc. )

REMOVING THE SPEAKER / SPEAKER HOLDER

" After removing the rear cover and the chassis.

1. Remove the 2 screws marked ''''as shown in Fig.2, then remove

the speaker holder toward you.

2. Remove the 2 screws marked ((((as shown in Fig.2.

3. Draw the speaker toward you.

4. Follow the same steps when removing the other hand speaker.

REMOVING THE DIGITAL INPUT MODULE PWB

" After removing the rear cover and terminal board.

1. Remove the 2 screws marked ))))as shown in Fig.2.

2. Remove the DIGITAL INPUT MODULE PW B in the arrow

direction marked ****.

* If necessary, take off the wire clamps, connectors etc.

CHECKING THE PW BOARD

1. To check the backside of the circuit board. (1) Pull out the chassis. (Refer to REMOVING THE CHASSIS). (2) Erect the chassis vertically so that you can easily check the

backside of the PW Board.

[CAUTION]

• When erecting the chassis, be careful so that there will be no

contact with other PWB.

• Before turning the power on, make sure that the CRT earth wire

and other connectors are properly connected.

WIRE CLAMPING AND CABLE TYING

1. Be sure to clamp the wire.

2. Never remove the cable tie used f or tying the wires together.

Should it be inadvertently removed, be sure to tie the wires with a new cable tie.

E

D

LAW

BASE

NTROL

BASE

10

AV-36P903/Y

AV-32P903/Y

DIGITAL INPUT MODULE

POWER CORD

36P903CP-S

32P903CP-S

CAUTION AT DISASSEMBLY

SSB-7836A- M2

SSB-7837A- M2

TERMINAL BOARD

＊

wire

WJJ0247-001A

＊

SB connect or

Fig. 1

" Prior to disassembly, unplug the power cord from the wall

outlet without fail. (Turn the power “off”.)

" Short the SB connector (1) pin and (2) pin of the digital input

unit. (At the time of assembling)

" Before the rear cover is inserted into the cabinet, release the

short-circuit bet ween the SB connector (1) pin and (2) pin of the digital input unit.

" After releasing the short-circuit between the SB connectors, do

not turn the pow er on until the rear cover is inserted into the cabinet.

* Negligenc e in carrying out the above steps may cause the

inactivation of the TV.

No. 52008

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HOLDER

CRT

(

)

PICT URE TUBE

V-36P903 V-32P903

SPEAKER

ANODE CAP

FRONT CABINET

LINE

FILTER PWB

DY

POWER

SW PWB

CONTROL

BASE

CLAW

FRONT

CONTROL PWB

G

(×2)

Fig.1

DEF. POWER PWB

CLAW

C

H

(×2)

F

(×2)

SPEAKER

DIGITAL INPUT

MODULE PWB

I

MAIN

PWB

CHASSIS

B

(×5)

TERM INAL

BOARD

POWER

CORD

REAR COVER

A

Fig.2

(×15)

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V-36P903

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V-32P903

REMOVING THE CRT ( Picture Tube )

∗ Replacement of the CRT should be perf ormed by 2 or more persons.

• After removing the rear cover, chassis etc.,

1. Putting the CRT change table on s oft cloth, the CRT change table should also be covered with such soft cloth (shown in Fig.3).

2. While keeping the surface of CRT down, mount the TV s et on the CRT change table balanced will as shown in Fig.4.

3. Remove 4 screws marked by arrows with a box type screwdriver as shown in Fig.4.

• Since the cabinet will drop when screws have been removed, be sure to support the cabinet with hands.

4. After 4 scr ews have been r emoved, put the cabinet slowly on cloth (At this time, be carefully so as not to damage the front surface of the c abinet) shown in Fig.5.

• The CRT should be assembled acc ording to the opposite sequence of its dismounting steps.

∗ The CRT change table should preferably be smaller that the

CRT surface, and its height be about 35cm.

CRT CHANGE TABLE

APPROX. 35cm

CLOTH

Fig. 3

CRT

CRT CHANGE TABLE

BOX TYPE SCREW DRIVER

COATING OF SILICON GREASE FOR ELECTRICAL INSULATION ON THE CRT ANODE CAP SECTION.

• Subsequent to replacement of the CRT and HV transf ormer or repair of the anode c ap, etc. by dismounting them, be sur e to coat silicon grease for electric al insulation as shown in Fig.6. Wipe around the anode button with clean and dry cloth. (Fig.6) Coat silicon grease on the section around the anode button. At this time, take care so that any silicon greases dose not sticks to the anode button. (Fig.7)

★★★★ Silicon grease product No. KS - 650N

CRT

Anode button

Silicon grease

coating

CABINET

Approx. 20mm (Do not coat greas e on this section

Anode button (N o stic king of silicon gr ease)

Fig. 4

CRT

CRT CHANGE TABLE

Fig. 5

Silicon grease should be coated by 5mm or more from the outside diameter of anode cap.

Coating position of silicon grease

Anode c ap

Fig. 6 Fig. 7

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REPLACEMENT OF CHIP COMPONENT

! CAUTIONS

1. Avoid heating f or more than 3 s econds.

2. Do not rub the electrodes and the resist parts of the pattern.

3. When removing a chip part, melt the solder adequately.

4. Do not reuse a chip part after removing it.

! SOLDERING IRON

1. Use a high insulation soldering iron with a thin pointed end of it.

2. A 30w s oldering iron is recommended for easily removing parts.

! REPLACEMENT STEPS

1.

How to remove Chip parts

#### Resistors, capacitors, etc

(1) As shown in the figure, push the part with tweezers and

alternately melt the solder at each end.

(2) Shift with tweezers and remove the chip part.

#### Transistor s, diodes, variable r esistors, etc

(1) Apply extra s older to each lead.

V-36P903 V-32P903

2. How to install Chip parts

#### Resistors, capacitors, etc

(1) Apply solder to the pattern as indicated in the figure.

(2) Grasp the chip part with tweezers and place it on t he solder.

Then heat and melt the solder at both ends of the chip part.

#### Transistor s, diodes, variable r esistors, etc

(1) Apply solder to the pattern as indicated in the figure. (2) Grasp the chip part with tweezers and place it on t he solder.

(3) First solder lead

as indicated in the figure.

A

SOLDER

(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.

SOLDER

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(4) Then solder leads

A

C

and C.

B

C

B

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V-32P903

MEMORY IC REPLACEMENT

1. Memory IC

This model uses a memory IC. This memory IC stores data for proper operation of the video and deflection circuits. When replacin g t he m em or y IC , b e sur e to use an IC containing this (initial value) data.

2. Memory IC replacement procedure

(1) Power off

Switch the power off and disconnect the power cord from the wall outlet.

(2) Replace the memory IC

Initial value must be entered into the new IC.

(3) Power on

Connect the power cord to the wall outlet and switch the power on.

(4) SERVICE MENU setting

1) Press SLEEP TIMER key and, while the indic ation of SLEEP TIMER 0 MIN is being displayed, press DISPLAY key and VIDEO STAT US key on the remote

control unit (Fig.2) simultaneously.

2) The SERVICE MENU screen as shown in Fig.1 is displayed.

3) Verif y what to set in the SERVICE MENU, and s et whatever is necessary (Fig.1). Refer to the SERVICE ADJUSTMENT for setting.

4) Press the EXIT key twice to r eturn normal screen.

(5) Receive channel setting

Refer to the OPERATING INSTRUCTIONS (USER’S GUIDE) and set the receive channels (Channels Preset) as described.

SERVICE MENU

SERVICE MENU SERVICE MENU

1.PICTURE/SOUND

1.PICTURE/SOUND 7.I2C BUS

1.PICTURE/SOUND1.PICTURE/SOUND

2.YC SEP

2.YC SEP 8.PP

2.YC SEP2.YC SEP

3.LOW LIGHT

3.LOW LIGHT 9.IP

3.LOW LIGHT3.LOW LIGHT

4.HIGH LIGHT

4.HIGH LIGHT 0.SELF-CHK

4.HIGH LIGHT4.HIGH LIGHT

5.RF AFC

5.RF AFC5.RF AFC

6.PIP

6.PIP6.PIP

Fig.1

SERVICE MENU SELECT KEY

DISPLAY

SLEEP TIMER

VIDEO

STATUS

MEMORY (MUTING)

VALUE SELECT(－)

FUNCTION

MENU

7.I2C BUS

7.I2C BUS7.I2C BUS

8.PP

8.PP8.PP

9.IP

9.IP9.IP

0.SELF-CHK

0.SELF-CHK0.SELF-CHK

POWER

NUMBERS key

FUNCTION

ITE M SELECT(▲)

VALUE SELECT(＋)

EXIT / PIP OFF

ITE M SELECT(▼)

FUNCTION

(6) User settings

Check the user s etting items according to the steps described in the after page. Where these do not agree, refer to the OPERATING INSTRUCTIONS (USER’S GUIDE) and set the items as described.

Fig.2

14

No. 52008

A

V-36P903

A

V-32P903

LAST MEMORY OF FACTORY

NTSC / 525p(ED) system

Item

TINT COLOR PICTURE BRIGHT DET AIL

STANDARD 00 00 00 00 00 LOW 00

THATER 00 00 00 00 00 HIGH 00

DYNAMIC 00 00 +30 00 +03 HIGH 00

HD(1080i) system

Item

TINT COLOR PICTURE BRIGHT DET AIL

STANDARD 00 00 00 00

THATER 00 00 00 00

DYNAMIC0000+20000HIGH00

SETTING VALUE

DIGI. NOISE

(CLEAR)

DIGI. NOISE

(CLEAR)

00

COLOR

(TEMPERATURE)

COLOR

(TEMPERATURE)

LOW

00 LOW 00

CH. SETTING ( CHANNEL SUMMARY) [ ○○○○:Add. CH / ――

―― :Erase CH]

――――

BAND Ch Display Setting BAND Ch Display Setting

02 ○ N27 ――

――

――――

○

――

――――

SUPER

○

――

――――

○

――

――――

○

――

――――

――

――――

SUBMID

○

HYPER

○ ――

○

――

○ ――

――

―― ――

ULTRA

○

―― ――

――

O28

P29――――――

Q30――――――

R31

S32

T33――――――

U34――――――

V35――――――

W36

A-7 93

A-6 94

A-5 95

A-4 96

A-3 97

A-2 98

A-1 99

A-8 01

W+11 47

W+12 48

W+17 53

―― ――

――――

W+23 59

――

―― ――

――――

W+29 65

―― ――

――――

W+51

―― ――

――――

W+78

―― ――

――――

W+84

―― ――

――――

―― ――

――――

―― ――

――――

――

―― ――

――――

―― ――

――――

――

―― ――

――――

―― ――

――――

――

―― ――

――――

VHF

UHF

MID

SUPER

03

L

04

05

06

07

08

09

H

10

11

12

13

14

36

41

46

63

69

A14

B15

C16

D17

E18

F19――――――

G20――――――

H21

I22――――――

J23――――――

K24

L25――――――

M26――――――

――

――――

○

――

○

――

○

――

――――

――

――――

――

――――

○

(EXCEPT 32”TV)

○

――

――――

――

――――

○

(EXCEPT 32”TV)

○

(EXCEPT 32”TV)

○

――

――――

○

――

――――

――

――――

――

――――

――

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――

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No. 52008

15

JVC AV-32P903/Y, AV-36P903/Y Service Manual

CONTENTS

SPECIFICATIONS

SAFETY PRECAUTIONS

FEATURES

FUNCTIONS

SPECIFIC SERVICE INSTRUCTIONS