JVC TV-13143W, TV-13143 Service Manual

SERVICE MANUAL

TV/VCR COMBO

TV-13143

TV-13143 TV-13143W

SP/ EPTIMER

ZERO RETURN RESET

SET

–

SET

CANCEL

ENTER

MUTING

VOL VOL

TRACKING AUTO

PLAY

STOPREC PAUSE

TV-13143W

POWER

PROGRAM

COUNTER

RETURN

TV/CAP/TEXT

INPUT

SLEEPCALL

FFREW

PHONES

VIDEO - IN - AUDIO

VIDEO CASSETTE RECORDER

REC/ITR

SP / EPINPUT

CHANNEL

VOLUME

STOP / EJECTFFPLAYREW

ON TIMER

REC TIMER

REC

POWER

a SPECIFICATIONS ....................................................................................................................................2

¤ OPERATING INSTRUCTIONS (APPENDED)

a SAFETY PRECAUTIONS ........................................................................................................................3

a SPECIFIC SERVICE INSTRUCTIONS ....................................................................................................5

a SERVICE ADJUSTMENTS ....................................................................................................................21

a GUIDE FOR REPAIRING .......................................................................................................................31

¤ STANDARD CIRCUIT DIAGRAM ........................................................................................................ 2-1

a PARTS LIST ...........................................................................................................................................55

No. 51988

Feb. 2002

TV-13143 TV-13143W

SPECIFICATIONS

TELEVISION

Picture Tube: 13” (measured diagonally)

Tuner Type: Quartz PLL Frequency Synthesized

Receiving Channels: VHF 2-13

UHF 14-69

CATV 14-36 (A)-(W)

37-59 (AA)-(WW)

60-85 (AAA)-(ZZZ)

86-94 (86)-(94)

95-99 (A-5)-(A-1)

100-125 (100)-(125)

01 (5A)

Antenna Input: VHF/UHF In 75 ohms coaxial

Speaker: 1.5” x 2.5”, 8 ohms x 1

Audio Output Power: 1.5 W

VCR

Video System: VHS ,4 Rotary Heads Helical scanning System

Video Signal: NTSC Color

Cassette Tape: VHS

Video Head: 4 Head

Audio Track: 1 Track

Tape Speed: SP:33.35mm/sec

EP:11.12mm/sec

F.FWD/REW Time: F.FWD: Approx. 4 minutes and 50 seconds

REW: Approx. 2 minutes and 30 seconds

(T-120 Cassette)

Speed Search: SP 3&5 X Normal Speed

EP 9&15 X Normal Speed

GENERAL

Power Source: AC 120V 60Hz

Power Consumption: 65 Watts

Dimensions: W 14-1/4” x D 14-7/16” x H 15-1/16”

Weight: 24.3 Ibs/11 kg

Inputs: Video: In (RCA) 1Vp-p 75 ohm

Audio: In (RCA) 300 mV/50K ohm

Headphone Jack: 3.5mm mini-jack

Storage Temperature -20 °C ~ 60 °C

Operating Temperature 5 °C ~ 40 °C

Accessories:

Remote Control X 1

Batteries (AA) X 2

Design & specification are subject to change without notice.

2 No. 51988

SAFETY PRECAUTIONS

SERVICING NOTICES ON CHECKING

As for the places which need special attentions, they are indicated with the labels or seals on the cabinet, chassis and parts. Make sure to keep the indications and notices in the operation manual.

2. AVOID AN ELECTRIC SHOCK

There is a high voltage part inside. Avoid an electric shock while the electric current is flowing.

3. USE THE DESIGNATED PARTS

The parts in this equipment have the specific characters of incombustibility and withstand voltage for safety. Therefore, the part which is replaced should be used the part which has the same character. Especially as to the important parts for safety which is indicated in the circuit diagram or the table of parts as a mark, the designated parts must be used.

4. PUT PARTS AND WIRES IN THE ORIGINAL POSITION AFTER ASSEMBLING OR WIRING

There are parts which use the insulation material such as a tube or tape for safety, or which are assembled in the condition that these do not contact with the printed board. The inside wiring is designed not to get closer to the pyrogenic parts and high voltage parts. Therefore, put these parts in the original positions.

5. TAKE CARE TO DEAL WITH THE CATHODE-RAY TUBE

In the condition that an explosion-proof cathoderay tube is set in this equipment, safety is secured against implosion. However, when removing it or serving from backward, it is dangerous to give a shock. Take enough care to deal with it.

6. AVOID AN X-RAY1. KEEP THE NOTICES

Safety is secured against an X-ray by considering about the cathode-ray tube and the high voltage peripheral circuit, etc. Therefore, when repairing the high voltage peripheral circuit, use the designated parts and make sure not modify the circuit. Repairing except indicates causes rising of high voltage, and it emits an X-ray from the cathoderay tube.

PERFORM A SAFETY CHECK AFTER

7. SERVICING

Confirm that the screws, parts and wiring which were removed in order to service are put in the original positions, or whether there are the portions which are deteriorated around the serviced places serviced or not. Check the insulation between the antenna terminal or external metal and the AC cord plug blades. And be sure the safety of that.

(INSULATION CHECK PROCEDURE)

Unplug the plug from the AC outlet.

Remove the antenna terminal on TV and turn on the TV.

Insulation resistance between the cord plug terminals and the eternal exposure metal [Note 2] should be more than 1M ohm by using the 500V insulation resistance meter [Note 1].

If the insulation resistance is less than 1M ohm, the inspection repair should be required.

[Note 1]

If you have not the 500V insulation resistance meter, use a Tester.

[Note 2]

External exposure metal: Antenna terminal

Earphone jack

TV-13143 TV-13143W

HOW TO ORDER PARTS

Please include the following informations when you order parts. (Particularly the VERSION LETTER.)

1. MODEL NUMBER and VERSION LETTER The MODEL NUMBER can be found on the back of each product and the VERSION LETTER can be

found at the end of the SERIAL NUMBER.

2. PART NO. and DESCRIPTION You can find it in your SERVICE MANUAL.

No. 51988 3

TV-13143 TV-13143W

TAPE REMOVAL METHOD AT NO POWER SUPPLY

Remove the VCR block from the main unit.

(Refer to item 1 of the DISASSEMBLY INSTRUCTIONS.)

Remove the screw 1 of the Deck Chassis and remove the Loading Motor.

Rotate the Pinch Roller Cam in the direction of the arrow by hand to slacken the Video Tape.

Rotate the Clutch Ass'y either of the directions to wind the Video Tape in the Cassette Case.

Repeat the above step 3~4. Then take out the Video Cassette from the Deck Chassis. Be careful not to scratch on the tape.

Loading Motor

Screw 1

Pinch Roller Cam

Main Cam

Capstan DD Unit

Clutch Ass'y

Main Chassis (Front Side)

4 No. 51988

SPECIFIC SERVICE INSTRUCTIONS

DISASSEMBLY INSTRUCTIONS

REMOVAL OF MECHANICAL PARTS AND P.C. BOARDS

1-1: BACK CABINET (Refer to Fig. 1-1)

Remove the 5 screws 1.

Remove the AC cord from the AC cord hook 2.

Remove the Back Cabinet in the direction of arrow.

Front Cabinet

CP757

CP353

CP401

CP502

TV-13143 TV-13143W

Front Cabinet

Back Cabinet

1-2: CRT PCB (Refer to Fig. 1-2)

CAUTION:

BEFORE REMOVING THE ANODE CAP, DISCHARGE ELECTRICITY BECAUSE IT CONTAINS HIGH VOLTAGE. BEFORE ATTEMPTING TO REMOVE OR REPAIR ANY PCB, UNPLUG THE POWER CORD FROM THE AC SOURCE.

Remove the Anode Cap. (Refer to REMOVAL OF ANODE CAP)

Disconnect the following connector: (CP801).

Remove the CRT PCB in the direction of arrow.

Front Cabinet

CP801

CRT PCB

Fig. 1-1

UP TO RELEASE

TV/VCR Block

1-4:

DECK CHASSIS AND SYSCON PCB (Refer to Fig. 1-4)

Remove the screw 1.

Remove the screw 2.

Remove the screw 3.

Remove the Deck Shield Plate in direction of arrow (A).

Remove the screw 4 and remove the Cover Light Plate.

Remove the 3 screws 5.

Disconnect the following connectors: (CP1001, CP4001, CP4002 and CP4003).

Remove the Deck Chassis in the direction of arrow (B).

Remove the screw 6.

10.

Remove the Syscon PCB in the direction of arrow (C).

Deck Shield Plate

(A)

Deck Chassis

Fig. 1-3

1-3: TV/VCR BLOCK (Refer to Fig. 1-3)

Remove the 2 screws 1.

Disconnect the following connectors: (CP401, CP502, CP757 and CP353).

Unlock the support 2.

Remove the TV/VCR Block in the direction of arrow.

Fig. 1-2

(B)

CP4003

CP4001

(C)

Syscon PCB

CP4002

CP1001

Cover Light Plate

Deck Holder

Fig. 1-4

No. 51988 5

TV-13143 TV-13143W

DISASSEMBLY INSTRUCTIONS

2. REMOVAL OF DECK PARTS

2-1: TOP BRACKET (Refer to Fig. 2-1)

Extend the 2 supports 1.

Slide the 2 supports 2 and remove the Top Bracket.

NOTE

After the installation of the Top Bracket, bend the support

1 so that the Top Bracket is fixed.

Top Bracket

Main Chassis

2-2: CASSETTE HOLDER ASS'Y (Refer to Fig. 2-2)

Move the Cassette Holder Ass'y to the front side.

Push the Locker R to remove the Cassette Side R.

Remove the Cassette Side L.

Cassette Side R

Main Chassis

Locker R

Fig. 2-1

NOTE

In case of the Locker R installation, check if the two

1. positions of Fig. 2-3-B are correctly locked. When you install the Cassette Side R, be sure to move

2. the Locker R after installing.

Locker R

Check if these

Cassette Side R

positions are locked.

2-4: LINK UNIT (Refer to Fig. 2-4)

Set the Link Unit to the Eject position.

Unlock the support 1.

Remove the (A) side of the Link Unit first, then remove the (B) side.

Main Chassis

Link Unit

Fig. 2-3-B

Link Unit

Cassette Side L

Main Chassis

2-3: CASSETTE SIDE L/R (Refer to Fig. 2-3-A)

Remove the Locker Spring.

Unlock the 4 supports 1 and then remove the Cassette Side L/R.

Unlock the support 2 and then remove the Locker R.

Locker Spring

Cassette Side R

Cassette Holder

Locker R

Cassette Side L

Fig. 2-2

(A)

(B)

Link Unit

Main Chassis

2-5: LINK LEVER/FLAP LEVER (Refer to Fig. 2-5)

Extend the support 1.

Remove the Link Lever.

Remove the Flap Lever.

Flap Lever

Link Lever

Fig. 2-4

Fig. 2-5

Fig. 2-3-A

6 No. 51988

DISASSEMBLY INSTRUCTIONS

TV-13143 TV-13143W

2-6: LOADING MOTOR/WORM (Refer to Fig. 2-6-A)

Remove the screw 1.

Remove the Loading Motor.

Remove the Worm.

Loading Motor

Worm

Main Chassis

• Screw Torque: 3 ± 0.5kgf•cm

Fig. 2-6-A

NOTE

1.2.In case of the Worm installation, check if the value of the Fig. 2-6-B is correct. In case of the Loading Motor installation, hook the wire on the Cassette Opener as shown Fig. 2-6-C.

19.2 ± 0.1mm

Safety surface for pressing of the insert.

Fig. 2-6-B

Tension Arm Ass’y

Fig. 2-7-A

Tension Connect

Tension Spring

Tension Holder

Tension Band

Tension Arm Ass’y

Fig. 2-7-B

NOTE

In case of the Tension Band installation, note the direction of the installation. (Refer to Fig. 2-7-C)

In case of the Tension Band installation, install correctly as Fig. 2-7-D.

In case of the Tension Connect installation, install as the circled section of Fig. 2-7-E.

Loading Motor

Cassette Opener

Fig. 2-6-C

2-7: TENSION ASS’Y (Refer to Fig. 2-7-B)

Turn the Pinch Roller Cam clockwise so that the Tension Holder hook is set to the position of Fig. 2-7-A to move the Tension Arm Ass’y.

Remove the Tension Spring.

Unlock the 2 supports 1 and remove the Tension Band.

Unlock the support 2 and remove the Tension Arm Ass’y.

Unlock the support 3 and remove the Tension Connect.

Float the hook 4 and turn it clockwise then remove the Tension Holder.

Tension Connect

Tension Band

Fig. 2-7-C

[OK]

[NG]

Tension Connect

Tension Band

Fig. 2-7-D

Tension Connect

Main Chassis

Fig. 2-7-E

No. 51988 7

TV-13143 TV-13143W

DISASSEMBLY INSTRUCTIONS

2-8: T BRAKE ARM/T BRAKE BAND (Refer to Fig. 2-8-A)

Remove the T Brake Spring.

1. Turn the T Brake Arm clockwise and bend the hook

2. section to remove it. Unlock the 2 supports 1 and remove the T Brake Band.

T Brake Band

Hook section

T Brake Arm

T Brake Spring

Idler Gear

(A)

Idler Arm Ass’y

(B)

S Reel

T Reel

(A)

Fig. 2-8-A

NOTE

1. In case of the T Brake Band installation, install correctly as Fig. 2-8-B.

[OK]

T Brake Band

[NG]

T Brake Band

T Brake Arm

Fig. 2-8-B

2-9: S REEL/T REEL/IDLER ARM ASS’Y/IDLER GEAR

(Refer to Fig. 2-9-A)

Remove the S Reel and T Reel.

Remove the 2 Polyslider Washers 1.

Remove the Idler Arm Ass’y and Idler Gear.

NOTE

Take care not to damage the gears of the S Reel and T Reel.

The Polyslider Washer may be remained on the back of the reel.

Take care not to damage the shaft.

Do not touch the section “A” of S Reel and T Reel. (Use gloves.) (Refer to Fig. 2-9-A) Do not adhere the stains on it.

When you install the reel, clean the shaft and grease it (FG-84M). (If you do not grease, noise may be heard in FF/REW mode.)

After installing the reel, adjust the height of the reel.

(Refer to MECHANICAL ADJUSTMENT)

Fig. 2-9-A

NOTE

1.2.In case of the S Reel and T Reel installation, check if the correct parts are installed. (Refer to Fig. 2-9-B) In case of the Idler Arm Ass’y installation, install correctly as Fig. 2-9-C. And also set it so that the section “B” of Fig. 2-9-A is placed under the Main Chassis tab.

Big Hole (S Reel)

Small Hole (T Reel)

Fig. 2-9-B

[OK]

Clutch Gear

Idler Arm Ass’y

[NG]

Idler Arm Ass’y

Clutch Gear

Fig. 2-9-C

8 No. 51988

DISASSEMBLY INSTRUCTIONS

2-10: CASSETTE OPENER/PINCH ROLLER BLOCK/P5

ARM ASS’Y (Refer to Fig. 2-10-A)

1.2.Unlock the support 1 and remove the Cassette Opener. Remove the Pinch Roller Block and P5 Arm Ass’y.

TV-13143 TV-13143W

Cassette Opener

Pinch Roller Block

P5 Arm Ass’y

Main Chassis

Fig. 2-10-A

NOTE

1.2.Do not touch the Pinch Roller. (Use gloves.) In case of the Pinch Roller Block and the Pinch Roller Cam installation, install correctly as Fig. 2-10-B.

Pinch Roller Block

P5 Arm Ass’y

Can be seen the hole of the Main Cam.

Can be seen the hole of the Pinch Roller Cam.

Fig. 2-10-B

2-11: A/C HEAD (Refer to Fig. 2-11-A)

Remove the screw 1.

Remove the A/C Head Base.

Remove the 3 screws 2.

Remove the A/C Head and A/C Head Spring.

NOTE

Do not touch the A/C Head. (Use gloves.)

When you install the A/C Head Spring, install as shown in Fig. 2-11-B.

When you install the A/C Head, tighten the screw (1) first, then tighten the screw (2), finally tighten the screw (3).

(3)

(1)

(2)

A/C Head

Spring Position

Fig. 2-11-B

2-12: FE HEAD (RECORDER ONLY) (Refer to Fig. 2-12)

1.2.Remove the screw 1. Remove the FE Head.

FE Head

• Screw Torque: 5 ± 0.5kgf•cm

• The FE Head is not installed on the Video Cassette Player.

Fig. 2-12

2-13: CYLINDER UNIT ASS’Y (Refer to Fig. 2-13)

Disconnect the following connector: (CD2001)

Remove the 3 screws 1.

Remove the Cylinder Unit Ass’y.

NOTE

1. When you install the Cylinder Unit Ass’y, tighten the screws from (1) to (3) in order while pulling the Ass’y toward the left front direction.

CD2001

Cylinder Unit Ass’y

• Screw Torque: 5 ± 0.5kgf•cm (Screw 1)

A/C Head Spring

A/C Head Base

Fig. 2-11-A

(3)

(2)

Fig. 2-13

• Screw Torque: 3 ± 0.5kgf•cm

(1)

No. 51988 9

TV-13143 TV-13143W

DISASSEMBLY INSTRUCTIONS

2-14: CAPSTAN DD UNIT (Refer to Fig. 2-14-A)

Remove the Capstan Belt.

Remove the 3 screws 1.

Remove the Capstan DD Unit.

Capstan Belt

Capstan DD Unit

• Screw Torque: 4 ± 0.5kgf•cm

Fig. 2-14-A

NOTE

1. In case of the Capstan DD Unit installation, apply the silicon bond (TSE3843-W) on the position Fig. 2-14-B correctly. (If no silicon bond applied, abnormal noise will be heard on the deck operation.)

(Refer to Fig. 2-14-B, C)

Applied position of silicon bond

2-15: MAIN CAM/PINCH ROLLER CAM/JOINT GEAR

(Refer to Fig. 2-15-A)

1.2.Remove the E-Ring 1, then remove the Main Cam.

Remove the E-Ring 2, then remove the Pinch Roller Cam and Joint Gear.

Main Cam

Pinch Roller Cam

Joint Gear

Fig. 2-15-A

NOTE

1. In case of the Pinch Roller Cam and Main Cam installation, install them as the circled section of Fig. 2-15-B so that the each markers are met. (Refer to Fig. 2-15-B) And also can be seen the Main Chassis hole through the Main Cam maker hole.

Pinch Roller Cam

Marker

Main Cam

Be careful not to apply the silicon bond to the Pinch Roller.

Fig. 2-14-B

Silicon Bond

Capstan DD Unit

Main Chassis

Fig. 2-14-C

10 No. 51988

Fig. 2-15-B

2-16: LOADING GEAR S/T UNIT (Refer to Fig. 2-16-A)

1.2.Remove the E-Ring 1 and remove the Main Loading Gear. Remove the Main Rod, Tension Lever, Loading Arm S Unit and Loading Arm T Unit.

Main Rod

Tension Lever

Main Loading Gear

Loading Arm T Unit

Loading Arm S Unit

Fig. 2-16-A

DISASSEMBLY INSTRUCTIONS

TV-13143 TV-13143W

NOTE

1. When you install the Loading Arm S Unit, Loading Arm T Unit and Main Loading Gear, align each marker. (Refer

to Fig. 2-16-B)

Marker

Main Loading Gear

Marker

Loading Arm T Unit Loading Arm S Unit

Fig. 2-16-B

2-17: CLUTCH ASS’Y/RING SPRING/CLUTCH LEVER/

CLUTCH GEAR (Refer to Fig. 2-17-A)

Remove the Polyslider Washer 1.

Remove the Clutch Ass’y and Ring Spring.

Remove the Clutch Lever.

Remove the Coupling Gear, Coupling Spring and Clutch Gear.

Clutch Ass’y

Ring Spring

2-18: CASSETTE GUIDE POST/INCLINED BASE S/T

UNIT/P4 CAP (Refer to Fig. 2-18-A)

Remove the P4 Cap.

Unlock the support 1 and remove the Cassette Guide Post.

Remove the Inclined Base S Unit and Inclined Base T Unit.

Inclined Base S Unit Inclined Base T

Cassette Guide Post

Unit

P4 Cap

Fig. 2-18-A

NOTE

Do not touch the roller of Guide Roller.

In case of the P4 Cap installation, install it with parallel for “A” and “B” of Fig. 2-18-B.

In case of the Cassette Guide Post installation, install correctly as the circled section of Fig. 2-18-C.

Coupling Gear

Coupling Spring

Clutch Gear

Clutch Lever

Fig. 2-17-A

NOTE

1. In case of the Clutch Ass’y installation, install it with inserting the spring of the Clutch Ass’y into the dent of the Coupling Gear. (Refer to Fig. 2-17-B)

Clutch Ass’y

Coupling Gear

Fig. 2-17-B

“A”“B”

P4 Cap

[OK]

Cassette Guide Post

[NG]

Cassette Guide Post

Cassette Opener

Fig. 2-18-B

Fig. 2-18-C

No. 51988 11

TV-13143 TV-13143W

DISASSEMBLY INSTRUCTIONS

3. REMOVAL OF ANODE CAP

Read the following NOTED items before starting work.

After turning the power off there might still be a potential voltage that is very dangerous. When removing the Anode Cap, make sure to discharge the Anode Cap's potential voltage. Do not use pliers to loosen or tighten the Anode Cap

terminal, this may cause the spring to be damaged.

REMOVAL

1. Follow the steps as follows to discharge the Anode Cap.

(Refer to Fig. 3-1.)

Connect one end of an Alligator Clip to the metal part of a flat-blade screwdriver and the other end to ground. While holding the plastic part of the insulated Screwdriver, touch the support of the Anode with the tip of the Screwdriver. A cracking noise will be heard as the voltage is discharged.

GND on the CRT

3. After one side is removed, pull in the opposite direction to remove the other.

NOTE

Take care not to damage the Rubber Cap.

INSTALLATION

1. Clean the spot where the cap was located with a small amount of alcohol. (Refer to Fig. 3-3.)

NOTE

Confirm that there is no dirt, dust, etc. at the spot where the cap was located.

Location of Anode Cap

Fig. 3-3

Screwdriver

Alligator Clip

GND on the CRT

Flip up the sides of the Rubber Cap in the direction of the

2. arrow and remove one side of the support.

(Refer to Fig. 3-2.)

Rubber Cap

Support

CRT

Fig. 3-1

2.3.Arrange the wire of the Anode Cap and make sure the wire is not twisted. Turn over the Rubber Cap. (Refer to Fig. 3-4.)

Fig. 3-4

4. Insert one end of the Anode Support into the anode button, then the other as shown in Fig. 3-5.

CRT

Support

12 No. 51988

Fig. 3-2

Support

CRT

5.6.Confirm that the Support is securely connected. Put on the Rubber Cap without moving any parts.

Fig. 3-5

DISASSEMBLY INSTRUCTIONS

TV-13143 TV-13143W

4. REMOVAL AND INSTALLATION OF FLAT PACKAGE IC

REMOVAL

1. Put the Masking Tape (cotton tape) around the Flat

Package IC to protect other parts from any damage.

(Refer to Fig. 4-1.)

NOTE

Masking is carried out on all the parts located within 10 mm distance from IC leads.

Masking Tape (Cotton Tape)

2. Heat the IC leads using a blower type IC desoldering

machine. (Refer to Fig. 4-2.)

NOTE

Do not add the rotating and the back and forth directions force on the IC, until IC can move back and forth easily after desoldering the IC leads completely.

Fig. 4-1

Blower type IC desoldering machine

3. When IC starts moving back and forth easily after desoldering completely, pickup the corner of the IC using a tweezers and remove the IC by moving with the IC desoldering machine. (Refer to Fig. 4-3.)

NOTE

Some ICs on the PCB are affixed with glue, so be careful not to break or damage the foil of each IC leads or solder lands under the IC when removing it.

Blower type IC desoldering machine

Tweezers

4.5.Peel off the Masking Tape. Absorb the solder left on the pattern using the Braided Shield Wire. (Refer to Fig. 4-4.)

NOTE

Do not move the Braided Shield Wire in the vertical direction towards the IC pattern.

Fig. 4-3

Braided Shield Wire

Soldering Iron

Fig. 4-2

IC pattern

Fig. 4-4

No. 51988 13

TV-13143 TV-13143W

DISASSEMBLY INSTRUCTIONS

INSTALLATION

1. Take care of the polarity of new IC and then install the new IC fitting on the printed circuit pattern. Then solder each lead on the diagonal positions of IC temporarily.

(Refer to Fig. 4-5.)

Soldering Iron

Solder temporarily Solder temporarily

Fig. 4-5

2. Supply the solder from the upper position of IC leads sliding to the lower position of the IC leads. (Refer to Fig. 4-6.)

4. When bridge-soldering between terminals and/or the soldering amount are not enough, resolder using a Thintip Soldering Iron. (Refer to Fig. 4-8.)

Thin-tip Soldering Iron

Fig. 4-8

5. Finally, confirm the soldering status on four sides of the IC using a magnifying glass. Confirm that no abnormality is found on the soldering position and installation position of the parts around the IC. If some abnormality is found, correct by resoldering.

NOTE

When the IC leads are bent during soldering and/or repairing, do not repair the bending of leads. If the bending of leads are repaired, the pattern may be damaged. So, be always sure to replace the IC in this case.

Solder

Supply soldering from upper position to lower position

Soldering Iron

3. Absorb the solder left on the lead using the Braided Shield Wire. (Refer to Fig. 4-7.)

NOTE

Do not absorb the solder to excess.

Soldering Iron

Braided Shield Wire

Fig. 4-6

Fig. 4-7

14 No. 51988

A/C ACC AE AFC AFT AFT DET AGC AMP ANT A.PB APC ASS’Y AT AUTO A/V

BGP BOT BPF BRAKE SOL BUFF B/W

C CASE CAP CARR CH CLK CLOCK (SY-SE) COMB CONV CPM CTL CYL CYL-M CYL SENS

DATA (SY-CE) dB DC DD Unit DEMOD DET DEV

E EF EMPH ENC ENV EOT EQ EXT

F FBC FE FF FG FL SW FM FSC FWD

GEN GND

H.P.F

KEY TO ABBREVIATIONS

Audio/Control

Automatic Color Control

Audio Erase

Automatic Frequency Control

Automatic Fine Tuning

Automatic Fine Tuning Detect

Automatic Gain Control

Amplifier

Antenna

Audio Playback

Automatic Phase Control

Assembly

All Time

Automatic

Audio/Video

Burst Gate Pulse

Beginning of Tape

Bandpass Filter

Brake Solenoid

Buffer

Black and White

Capacitance, Collector

Cassette

Capstan

Carrier

Channel

Clock

Clock (Syscon to Servo)

Combination, Comb Filter

Converter

Capstan Motor

Control

Cylinder

Cylinder-Motor

Cylinder-Sensor

Data (Syscon to Servo)

Decibel

Direct Current

Direct Drive Motor Unit

Demodulator

Detector

Deviation

Emitter

Emitter Follower

Emphasis

Encoder

Envelope

End of Tape

Equalizer

External

Fuse

Feed Back Clamp

Full Erase

Fast Forward, Flipflop

Frequency Generator

Front Loading Switch

Frequency Modulation

Frequency Sub Carrier

Forward

Generator

Ground

High Pass Filter

H.SW Hz

IC IF IND INV

KIL

L LED LIMIT AMP LM, LDM LP L.P.F LUMI.

M MAX MINI MIX MM MOD MPX MS SW

NC NR

OSC OPE

PB PB CTL PB-C PB-Y PCB P. CON PD PG P-P

R REC REC-C REC-Y REEL BRK REEL S REF REG REW REV, RVS RF RMC RY

S. CLK S. COM S. DATA SEG SEL SENS SER SI SIF SO SOL SP STB SW

TV-13143 TV-13143W

Head Switch

Hertz

Integrated Circuit

Intermediate Frequency

Indicator

Inverter

Killer

Left

Light Emitting Diode

Limiter Amplifier

Loading Motor

Long Play

Low Pass Filter

Luminance

Motor

Maximum

Minimum

Mixer, mixing

Monostable Multivibrator

Modulator, Modulation

Multiplexer, Multiplex

Mecha State Switch

Non Connection

Noise Reduction

Oscillator

Operation

Playback

Playback Control

Playback-Chrominance

Playback-Luminance

Printed Circuit Board

Power Control

Phase Detector

Pulse Generator

Peak-to Peak

Right

Recording

Recording-Chrominance

Recording-Luminance

Reel Brake

Reel Sensor

Reference

Regulated, Regulator

Rewind

Reverse

Radio Frequency

Remote Control

Relay

Serial Clock

Sensor Common

Serial Data

Segment

Select, Selector

Sensor

Search Mode

Serial Input

Sound Intermediate Frequency

Serial Output

Solenoid

Standard Play

Serial Strobe

Switch

No. 51988 15

TV-13143 TV-13143W

SYNC SYNC SEP

TR TRAC TRICK PB TP

UNREG

V VCO VIF VP V. PB VR V.REC VSF VSR VSS V-SYNC VT

X’TAL

Y/C

KEY TO ABBREVIATIONS

Synchronization

Sync Separator, Separation

Transistor

Tracking

Trick Playback

Test Point

Unregulated

Volt

Voltage Controlled Oscillator

Video Intermediate Frequency

Vertical Pulse, Voltage Display

Video Playback

Variable Resistor

Video Recording

Visual Search Fast Forward

Visual Search Rewind

Voltage Super Source

Vertical-Synchronization

Voltage Tuning

Crystal

Luminance/Chrominance

16 No. 51988

TV-13143 TV-13143W

SERVICE MODE LIST

This unit provided with the following SERVICE MODES so you can repair, examine and adjust easily.

To enter SERVICE MODE, unplug AC cord till lost actual clock time. Then press and hold Vol (-) button of main unit and remocon key simultaneously.

The both pressing of set key and remote control key will not be possible if clock has been set. To reset clock, either unplug AC cord and allow at least 5 seconds before Power On.

Set Key Remocon Key

VOL. (-) MIN 0 Releasing of V-CHIP PASSWORD.

Initialization of the factory.

VOL. (-) MIN 1

VOL. (-) MIN 2

VOL. (-) MIN 3

VOL. (-) MIN 4

VOL. (-) MIN 5

VOL. (-) MIN 6

NOTE: Do not use this for the normal servicing.

If you set a factory initialization, the memories are reset such as the clock setting, the channel setting, the POWER ON total hours, and PLAY/REC total hours.

Horizontal position adjustment of OSD. NOTE: Also can be adjusted by using the Adjustment MENU. Refer to the “ELECTRICAL ADJUSTMENT” (OSD HORIZONTAL).

Adjust the SWITCHING POINT automatically. Refer to the “ELECTRICAL ADJUSTMENT” (SWITCHING POINT).

Adjust the SWITCHING POINT manually. Refer to the “ELECTRICAL ADJUSTMENT” (SWITCHING POINT).

Adjusting of the Tracking to the center position. NOTE: Also can be adjusted by pressing the ATR button for more than 2 seconds during PLAY.

POWER ON total hours and PLAY/REC total hours are displayed on the screen. Refer to the “PREVENTIVE CHECKS AND SERVICE INTERVALS” (CONFIRMATION OF HOURS USED).

Can be checked of the INITIAL DATA of MEMORY IC. Refer to the “WHEN REPLACING EEPROM (MEMORY) IC”.

Operations

VOL. (-) MIN 8

VOL. (-) MIN 9

Method Operations

Press the ATR button on the remote control for more than 2 seconds during PLAY.

Make the short circuit between the test point of SERVICE and the GND.

Writing of EEPROM initial data. NOTE: Do not use this for the normal servicing.

Display of the Adjustment MENU on the screen. Refer to the “ELECTRICAL ADJUSTMENT” (On-Screen Display Adjustment).

Adjusting of the Tracking to the center position. Refer to the “MECHANICAL ADJUSTMENT” (GUIDE ROLLER) and “ELECTRICAL ADJUSTMENT” (SWITHCHING POINT).

The BOT, EOT, and the Reel Sensor do not work and the deck can be operated without a cassette tape. Refer to the “PREPARATION FOR SERVICING”

No. 51988 17

+ 38 hidden pages

JVC TV-13143W, TV-13143 Service Manual

CONTENTS

SPECIFICATIONS

SAFETY PRECAUTIONS

SPECIFIC SERVICE INSTRUCTIONS