JVC AV-32R370KE, AV-32T35SPE, AV-32T67SKE Service Manual

52117200304

AV-32R370KE AV-32T67SKE AV-32T35SPE

SERVICE MANUAL

COLOUR TELEVISION

BASIC CHASSIS

AV-32R370KE,

JL2

AV-32T67SKE,

TV OK

AV-32T35SPE

AV-32R370KE AV-32T67SKE

TABLE OF CONTENTS

1 PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4

2 SPECIFIC SERVICE INSTRUCTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6

3 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-16

No.52117

2003/04

AV-32R370KE AV-32T67SKE AV-32T35SPE

SPECIFICATION

Item

Dimensions ( W x H x D ) 94.6cm x 56.2cm x 55.1cm 94.6cm x 56.2cm x 45.7cm 94.6cm x 56.2cm x 45.7cm Mass 57.5kg 54.5kg 54.5kg TV RF System CCIR ( I ) CCIR (B/G, I, L) Colour System PAL

NTSC (Only EXT mode)

Stereo System NICAM ( I ) A2 (B/G), NICAM (B/G, I, L) Receiving

Frequency

Intermediate Frequency

Colour Sub Carrier Frequency

Teletext System FLOF (Fastext level 2.5)

Power Input AC 220V~240V, 50Hz Power Consumption 200W(Max) / 127W(Avg)

Picture Tube Visible size : 76cm [measured diagonally] (H : 67.4cm x V : 38.4cm) High Voltage 31.0kV (+1kV / -1.5kV) (at zero beam current) Speaker

Audio Power Output

Aerial Input Terminal 75 ohm unbalanced, coaxial EXT-1 / EXT-2 / EXT-3

(Input / Output) EXT-4 S-Video Mini-DIN 4pin x 1

Audio Out (variable) 0 - 1000V(rms), low impedance Surround Rear Terminal 7.5W + 7.5W, 8 ohm --- --Headphone Jack Stereo mini jack (Ø3.5mm x 1) Remote Control Unit RM-C1504

VHF --- --- 47MHz - 470MHz UHF 470MHz - 862MHz 470MHz - 862MHz 470MHz - 862MHz French CATV

VIF Carrier 38.9MHz ( I ) 38.9MHz (B/G, I, L)

SIF Carrier 32.9MHz (6.0MHz :I) 33.4MHz (5.5MHz :B/G)

PAL 4.43MHz SECAM --- --- DR : 4.40625MHz

NTSC 3.58MHz / 4.43MHz

WST(Standard system)

Standby : 3W

MAIN : 6.5cm x 13cm oval type x 2 CENTER : 4cm x 16cm oval type x 2 SUB WOOFER : 13cm round type

MAIN : CENTER : SUB WOOFER :

21-pin Euro connector (SCART socket x 3)

Y : 1V(p-p) positive, negative sync, 75ohm

C : 0.286V(p-p) (burst signal) 75ohm Video 1V(p-p) positive, negative sync, 75ohm (RCA pin jack x 1) Audio 500mV(rms) (-4dBs), high impedance (RCA pin jack x 2)

(AA/R6 dry cell battery x 2)

AV-32R370KE AV-32T67SKE AV-32T35SPE

--- --- 116MHz - 172MHz

180W(Max) / 120W(Avg) Standby : 3W

6.5cm x 13cm oval type x 2 6.5cm x 13cm oval type x 2

10W + 10W

10W

18W

10W + 10W 10W + 10W

RM-C1500 (AA/R6 dry cell battery x 2)

Content

PAL SECAM NTSC (Only EXT mode)

220MHz - 469MHz

33.9MHz (L')

32.9MHz ( 6.0MHz:I )

32.4MHz (6.5MHz :L)

DB : 4.25MHz

TOP (German system) FLOF (Fastext level 2.5 720P) WST (Standard system)

180W(Max) / 120W(Avg) Standby : 3W

RM-C1502 (AA/R6 dry cell battery x 2)

Design & specifications are subject to change without notice.

[AV-32R370KE]

This product is manufactured under license from Dolby Laboratories Licensing Corporation. "Dolby" and the double-D symbol are trademarks of Dolby Laboratories Licensing Corporation.

1-2 (No.52117)

21-PIN EURO CONNECTOR (SCART) : EXT-1/EXT-2/EXT-3

PinNo. Signal designation Matching value EXT-1 EXT-2 EXT-3

1 AUDIO R output 500mV(rms) (Nominal),

Used (TV OUT) Used (LINE OUT) NC

Low impedance

2 AUDIO R input 500mV(rms) (Nominal),

Used (R1) Used (R2) Used (R3)

High impedance

3 AUDIO L output 500mV(rms) (Nominal),

Used (TV OUT) Used (LINE OUT) Not used

Low impedance 4 AUDIO GND Used Used Used 5 GND (B) Used Used Used 6 AUDIO L input 500mV(rms) (Nominal),

Used (L1) Used (L2) Used (L3)

High impedance 7 B input 700mV 8 FUNCTION SW

(SLOW SW)

Low : 0V-3V, High : 8V-12V,

High impedance

, 75 ohm Used Used Not used

(B-W)

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

, 75 ohm Used Used Not used

(B-W)

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

C : 300mV

16 Ys input

(FAST SW)

Low : 0V-0.4V, High : 1V-3V,

75 ohm

(B-W) (P-P)

, 75 ohm

Used (R) Used (C2/R) Used (C3)

Used Used Not used

17 GND (VIDEO output) Used Used Used 18 GND (VIDEO input) Used Used Used 19 VIDEO output 1V

(Negative sync),

(P-P)

Used (TV OUT) Used (LINE OUT) Not used

75 ohm

20 VIDEO / Y input 1V

(Negative sync),

(P-P)

Used Used Used

75 ohm

21 COMMON GND Used Used Used

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

AV-32R370KE AV-32T67SKE AV-32T35SPE

[Pin assignment]

20 18 16 14 12 10 8 6 4 2

21 19 17 15 13 11 9 7 5 3 1

(No.52117)1-3

AV-32R370KE AV-32T67SKE AV-32T35SPE

SECTION 1

PRECAUTIONS

1.1 SAFETY PRECAUTIONS [EXCEPT FOR UK]

(1) The design of this product contains special hardware,

many circuits and components specially for safety 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. Service 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 responsibility for personal injury or property damage resulting therefrom.

(3) Many electrical 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 necessarily be obtained by using replacement components 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 features are identified by sh ading on the schematics and by ( ) on the parts list in Service manual. The use of a substitute repl acement 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 hazards.

(4) 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 difference 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 the LIVE side GND and ISOLATED (NEUTRAL) side GND or EARTH side GND at the same time with a measuring apparatus (oscilloscope etc.). If above note will not be kept, a fuse or any parts will be broken.

(5) 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).

(6) 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 determine the cause by visual inspection (incorrect installation, cracked 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 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 10kohm 2W resistor to the anode button.

(8) When service is required, observe the original lead dress.

Extra precaution should be given to assure correct lead dress in the high voltage circuit area. Where a short circuit has occurred, those components that indicate evidence of overheating should be replaced. Always use the manufacturer's replacement components.

(9) Isolation Check

(Safety for Electrical Shock Hazard)

After re-assembling the product, always perform an isolation check on the exposed metal parts of the cabinet (antenna terminals, video/ audio input and output terminals, Control knobs, metal cabinet, screw heads, earphone jack, control shafts, etc.) to be sure the product is safe to operate without danger of electrical shock.

a) Dielectric 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 3000V AC (r.m.s.) for a period of one second. (. . . . Withstand 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 found in the service trade.

b) 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 ground (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 1500 ohm 10W resistor paralleled by a 0.15µF 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 measured 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 /V, OR MORE SENSITIVITY)

0.15 F AC-TYPE

PLACE THIS PROBE

1500 10W

GOOD EARTH GROUND

ON EACH EXPOSED METAL PART

1-4 (No.52117)

AV-32R370KE AV-32T67SKE AV-32T35SPE

1.2 SAFETY PRECAUTIONS [FOR UK]

(1) The design of this product contains special hardware and many circuits and components specially for safety purposes. For

continued protection, no changes should be made to the original design unl ess authorized in writing by the manufacturer. Replacement parts must be identical to those used in the original circuits. Service sh ould be performed by q ualified personn el only.

(2) Alterations of the design or circuitry of the product should not be made. Any design alterations or additions will void the

manufacturer's warranty and will further relieve the manufacturer of responsibility for personal injury or property damage resulting therefrom.

(3) Many electrical and mechanical parts in the product have special safety-related characteristics. These characteristics are often

not evident from visual inspection nor can the protection afforded by them necessary be obtained by using replacement components rated for higher voltage, wattage, etc. Replacement parts which have these special safety characteri stics 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 substi tute 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 hazards.

(4) The leads in the products are routed and dressed with ties, clamps, tubing’s, barriers and the like to be separated from live parts,

high temperature parts, moving parts and / or sharp edges for the prevention of electric shock and fire hazard. When service is required, the original lead routing and dress should be observed, and it shoul d be confirmed that they have been returned to normal, after re-assembling.

WARNING

(1) The equipment has been designed and manufactured to meet international safe ty standards. (2) It is the legal responsibility of the repairer to ensure that these safety standards are maintained. (3) Repairs must be made in accordance with the relevant safety standards. (4) It is essential that safety critical components are replaced by approved parts. (5) If mains voltage selector is provided, check setting for local voltage.

(No.52117)1-5

AV-32R370KE AV-32T67SKE AV-32T35SPE

SECTION 2

SPECIFIC SERVICE INSTRUCTIONS

2.1 FEATURES

Flat Surface CRT It became legible from any positions by CRT with few reflection and reflect lumps on the flat screen. Auto Aspect (WSS) By preference, users can select the picture size from REGULAR, PANORAMIC, FULL, 14:9ZOOM,

16:9ZOOM, 16:9 SUB TITLE modes. When the TV unit receive d WSS picture signal, the pi cture can be

changed to 16:9 mode automatically. TELETEXT The TELETEXT SYSTEM has a built-in FASTEXT and WST system. RETURN + You program a specific channel to return to while scanning through the channels using the CH+ and CH-

buttons. Dubbing mode Users can make VCR dubbing of picture an d sound by controlling the AV selector to select an optional

source at the EXT-2 output. Dolby Surround system With the PR O LOGIC 3D-PHONIC function, you can use the rear surround-ch annel signal of the Dolby

Surround encoded programme to create the surround sound images as if surround speakers were located

at your right and left. Sub Woofer System Powerful low-pitched sound can be enjoyed by sub woofer system.

2.2 MAIN DIFFERENCE LIST

Item

MAIN PWB ASSY SJL-1202A-U2 SJL-1204A-U2 SJL-1206A-U2 POWER & DEF PWB ASSY SJL-2202A-U2 SJL-2204A-U2 DOLBY PWB ASSY SJL0D201A-U2 ------- ------SIDE CONTROL PWB ASSY SJL-8101A-U2 SJL-8103S-U2 AV SW PWB ASSY SJL0S201A-U2 SJL0S202A-U2 SJL0S203A-U2 FRONT CABINET ASSY LC11563-003A-U LC11563-001A-U LC11360-007A-U REMOTE CONTROL UNIT RM-C1504 RM-C1500 RM-C1502 Dolby suround system available -------- -------3D sound -------- -------- available Hyper sound -------- available -------Sub woofer available --------

AV-32R370KE AV-32T67SKE AV-32T35SPE

Model name

1-6 (No.52117)

2.3 FUNCTIONS

AV-32R370KE AV-32T67SKE AV-32T35SPE

FRONT PANEL BUTTONS

Remote Control Sensor

Power Lamp

Main Power Button

REMOTE CONTROL UNIT

REAR TERMINALS AND BUTTONS

Headphone Jack

P Buttons, -/+ Buttons

5 6

Volume Button

WOOFER

AUDIO OUT

EXT-

(8 )

EXT-

SURROUND REAR

EXT-4 Terminal

Woofer Terminal

Audio Out Terminal

Surround Rear Terminal

EXT-1 Terminal

EXT-2 Terminal

EXT-3 Terminal

Aeriel Socket

WOOFER

AUDIO OUT

EXT-2

EXT-3

(8 )

EXT-1

SURROUND REAR

[AV-32R370KE]

EXT-2

EXT-3

TV OK

AUDIO OUT

EXT-1

[AV-32T67SKE] [AV-32T35SPE]

Muting Button

Number Buttons

Zoom Button

3D Button

Information Button

TV Button

Function UP/DOWN Button

Standby Button

Colour Buttons

OK Button

Function RIGHT/LEFT Buttons

VCR/DVD/Teletext Control Button

VCR/TEXT/DVD Switch

(No.52117)1-7

AV-32R370KE AV-32T67SKE AV-32T35SPE

2.4 DISASSEMBLY PROCEDURE The illustration of Fig.4 is explained about AV-32R370KE.

In case of AV-32T67SKE or AV-32T35SPE, you disassemble in the same procedure using Fig.5.

2.4.1 REMOVING THE REAR COVER

(1) Unplug the power plug. (2) Remove the sub woofer cord from the AV TERMINAL

BOARD.

(3) Remove the SUB WOOFER UNIT on the top of the rear

cover upward. (4) Remove the 13 screws [A] as shown in Fig.4. (5) Withdraw the REAR COVER toward you.

2.4.2 REMOVING THE SIDE CONTROL JACK ASSY

• Remove the REAR COVER. (1) Remove the screw [B] as shown in Fig.4. (2) Slightly pull the SIDE CONTROL JACK ASSY toward you,

and detach the claw from FRONT CABINET. Then it can be removed.

(3) Then disconnect the connector [SR], [SL], [S], [F] and

[CN016] as shown in Fig 1.

2.4.3 REMOVING THE SIDE CONTROL PWB

• Remove the REAR COVER.

• Remove the SIDE CONTROL JACK ASSY. (1) Remove the 3 claws [C] from backside of the SIDE

CONTROL JACK ASSY as shown in Fig.1.

(2) Remove the SIDE CONTROL PWB from the SIDE

CONTROL JACK ASSY.

2.4.4 REMOVING THE AV TERMINAL BOARD

• Remove the REAR COVER. (1) Remove the 5 screws [G] as shown in Fig. 4. (2) Remove the 2 claws [H] at the bottom of the AV

TERMINAL BOARD as shown in Fig. 2.

(3) Shift the AV TERMINAL BOARD slightly in the direction of

arrow [J], and remove it as shown in Fig. 2.

(4) At first, expand the lever [K] with the SUB WOOFER

connector, and pull it out of connector jack as shown in Fig.3.

2.4.5 REMOVING THE MAIN CHASSIS

• Remove the REAR COVER. (1) Slightly raise the MAIN CHASSIS, and release the two

claws at the bottom of and both sides of the MAIN CHASSIS.

(2) Then withdraw the MAIN CHASSIS backward from the

front cabinet. (If necessary, detach the wire clamp, connectors etc.)

2.4.6 REMOVING THE MAIN SPEAKER

• Remove the REAR COVER. (1) Remove the 2 screws [E], and detach the MAIN SPEAKER

HOLDER as shown in Fig. 4. (When removing the screws [E] of the MAIN SPEAKER HOLDER, the lower side screw first, and then upper one.)

(2) Remove the 4 screws [F], which attached the MAIN

SPEAKER.

(3) Follow the same steps when disassemble the other hand

MAIN SPEAKER.

2.4.7 REMOVING THE CENTER SPEAKER

• Remove the REAR COVER.

• Remove the MAIN CHASSIS. (1) Remove the 2 screws [D] as shown in Fig. 4. (2) Remove the CENTER SPEAKER. If necessary, detach the

cables.

2.4.8 CHECKING THE PW BOARD

(1) Pull out the MAIN CHASSIS (Refer to REMOVING THE

MAIN CHASSIS).

(2) Erect the MAIN CHASSIS vertically so that you can easily

check the PW Board form backside.

2.4.9 CAUTION

(1) When erecting the MAIN CHASSIS, be careful so that

there will be no contacting with other PWB.

(2) Before turning power on, make sure that the wire connector

is properly connected.

(3) When conducting a check with power supplied, be sure to

confirm that the CRT EARTH WIRE (BRAIDED ASS’Y) is connected to the CRT SOCKET PWB.

2.4.10 WIRE CLAMPING AND CABLE TYING

(1) Be sure to clamp the wire. (2) Never remove the cable tie used for tying the wires

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

Connector

CN016

SIDE CONTROL PWB

(Back view)

Fig.1

AV TERMINAL BOARD

AV SW PWB

Fig.2

SUB WOOFER CORD

AV TERMINAL BOARD

SUB WOOFER CORD

CONNECTOR for SUB WOOFER

Fig.3

1-8 (No.52117)

[EXPLODED VIEW FOR AV-32R370KE]

FRONT CABINET

CRT SOCKET PWB

AV-32R370KE AV-32T67SKE AV-32T35SPE

MAIN SPEAKER

HOLDER

MAIN SPEAKER

SIDE CONTROL JACK ASSY

REAR COVER

FRONT CONTROL PWB

CENTER SPEAKER

CONTROL BASE

AV SW PWB

CLAW

DOLBY PWB

SUB WOOFER UNIT

MAIN PWB

CLAW

POWER & DEF. PWB

MAIN CHASSIS

AV TERMINAL BOARD

POWER CORD

SUB WOOFER CORD

Fig.4

(No.52117)1-9

AV-32R370KE AV-32T67SKE AV-32T35SPE

[Exploded view for AV-32T67SKE and AV-32T35SPE]

FRONT CABINET

CRT

SIDE SPEAKER

HOLDER

SOCKET

PWB

MAIN SPEAKER

SIDE CONTROL JACK ASSEMBLY

REAR COVER

FRONT CONTROL PWB

CONTROL BASE

AV SW

CLAW

PWB

MAIN

PWB

CLAW

POWER & DEF.

MAIN CHASSIS

AV TERMINAL

POWER CORD

PWB

BOARD

1-10 (No.52117)

Fig.5

AV-32R370KE AV-32T67SKE AV-32T35SPE

2.4.11 REMOVING THE CRT NOTE:

• Replacement of the CRT should be performed by 2 or more persons.

• After removing the REAR COVER, CHASSIS etc.,

(1) Putting the CRT change table on soft cloth, the CRT

change table should also be covered with such soft cloth (shown in Fig. 6).

(2) While keeping the surface of CRT down, mount the TV set

on the CRT change table balanced will as shown in Fig. 7.

(3) Remove 4 screws marked by arrows with a box type

screwdriver as shown in Fig. 7.

NOTE:

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

(4) After 4 screws have been removed, put the cabinet slowly

on cloth (At this time, be carefully so as not to damage the front surface of the cabinet) shown in Fig. 8.

NOTE:

• The CRT should be assembled according 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

CLOTH

CRT CHANGE TABLE

Fig.6

CRT

Fig.7

APPROX. 35cm

BOX TYPE SCREW DRIVER

CRT

CABINET

CRT CHANGE T ABLE

Fig.8

CAUTION

The woofer unit is mounted on the TV. Always move the TV and woofer unit together when removing the TV from the box, or when moving the woofer unit. If the TV is tilted during movement, the woofer unit may fall. Be careful to keep the TV level when moving it. Do not grip the woofer unit only when moving the TV. Do not place objects on the woofer unit duct.

LIFTING CAUTION

FREE WOOFER UNIT

KEEP WITH UNIT

(No.52117)1-11

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