Philips 14PV374, 14PV375 Schematic

TV-VCR Combination

Service

14PV374 14PV375

/01/07/39/58

Service

Service Manual

Contents

Chapter

Adjustment Procedure

Sec. 1:

Schematic Diagrams and CBA's Exploded Views Mechanical and Electrical Parts Lists

Survey of versions:

/01 PAL-BG, EURO /07 PAL I, UK/IRELAND /39 PAL/SECAM-BG+PAL/SECAM-L/L',FRANCE /58 PAL-BG/DK+SECAM-BG/DK,EAST-EURO

Sec. 2:

Standard Maintenance Mechanism Alignment Procedures Disassembly / Assembly of Mechanism Deck Exploded Views

Safety regulations require that the set be restored to its original condition and that parts which are identical with those specified be used.

Published by BK 2003 Video Service Department Printed in the Netherlands c

MAIN SECTION

TV-VCR COMBINATION

Sec. 1: Main Section

I Adjustment Procedures I Schematic Diagrams and CBA’s I Exploded Views I Mechanical and Electrical Parts List

TABLE OF CONTENTS

IMPORTANT SAFETY PRECAUTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1-1

STANDARD NOTES FOR SERVICING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2-1

PREPARATION FOR SERVICING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3-1

OPERATING CONTROLS AND FUNCTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4-1

CABINET DISASSEMBLY INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5-1

ELECTRICAL ADJUSTMENT INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6-1

BLOCK DIAGRAMS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7-1

SCHEMATIC DIAGRAMS / CBA’S AND TEST POINTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8-1

WAVEFORMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-9-1

WIRING DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-10-1

SYSTEM CONTROL TIMING CHARTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-11-1

IC PIN FUNCTION DESCRIPTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-12-1

LEAD IDENTIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-13-1

ELECTRICAL PARTS LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-14-1

EXPLODED VIEWS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-15-1

SET MECHANICAL PARTS LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-16-1

IMPORTANT SAFETY PRECAUTIONS

Prior to shipment from the factory, our products are strictly inspected for recognized product safety and electrical codes of the countries in which they are to be sold. However, in order to maintain such compliance, it is equally important to implement the following precautions when a set is being serviced.

Safety Precautions for TV Circuit

1. Before returning an instrument to the customer, always make a safety check of the entire instru-

ment, including, but not limited to, the following items:

a. Be sure that no built-in protective devices are de-

fective and have been defeated during servicing. (1) Protective shields are provided on this chassis to protect both the technician and the customer. Correctly replace all missing protective shields, including any removed for servicing convenience. (2) When reinstalling the chassis and/or other assembly in the cabinet, be sure to put back in place all protective devices, including but not limited to, nonmetallic control knobs, insulating fishpapers, adjustment and compartment covers/shields, and isolation resistor/capacitor networks. Do not oper-

ate this instrument or permit it to be operated without all protective devices correctly installed and functioning. Servicers who defeat safety features or fail to perform safety checks may be liable for any resulting damage.

b. Be sure that there are no cabinet openings through

which an adult or child might be able to insert their fingers and contact a hazardous voltage. Such openings include, but are not limited to, (1) spacing between the picture tube and the cabinet mask, (2) excessively wide cabinet ventilation slots, and (3) an improperly fitted and/or incorrectly secured cabinet back cover.

c. Antenna Cold Check - With the instrument AC

plug removed from any AC source, connect an electrical jumper across the two AC plug prongs. Place the instrument AC switch in the on position. Connect one lead of an ohmmeter to the AC plug prongs tied together and touch the other ohmmeter lead in turn to each tuner antenna input exposed terminal screw and, if applicable, to the coaxial connector. If the measured resistance is less than 1.0 megohm or greater than 5.2 megohm, an abnormality exists that must be corrected before the instrument is returned to the customer. Repeat this test with the instrument AC switch in the off position.

d. Leakage Current Hot Check - With the instru-

ment completely reassembled, plug the AC line cord directly into a 120V AC outlet. (Do not use an isolation transformer during this test.) Use a leak-

age current tester or a metering system that complies with American National Standards Institute (ANSI) C101.1 Leakage Current for Appliances and Underwriters Laboratories (UL) 1410, (50.7). With the instrument AC switch first in the on position and then in the off position, measure from a known earth ground (metal water pipe, conduit, etc.) to all exposed metal parts of the instrument (antennas, handle brackets, metal cabinet, screw heads, metallic overlays, control shafts, etc.), especially any exposed metal parts that offer an electrical return path to the chassis. Any current measured must not exceed 0.5 milli-ampere. Reverse the instrument power cord plug in the outlet and repeat the test.

READING SHOULD NOT BE ABOVE 0.5 mA

LEAKAGE

DEVICE

BEING

TESTED

TEST ALL EXPOSED

METAL SURFACES

ALSO TEST WITH PLUG REVERSED USING AC ADAPTER PLUG

AS REQUIRED

CURRENT

TESTER

EARTH GROUND

ANY MEASUREMENTS NOT WITHIN THE LIMITS SPECIFIED HEREIN INDICATE A POTENTIAL SHOCK HAZARD THAT MUST BE ELIMINATED BEFORE RETURNING THE INSTRUMENT TO THE CUSTOMER OR BEFORE CONNECTING THE ANTENNA OR ACCESSORIES.

e. X-Radiation and High Voltage Limits - Because

the picture tube is the primary potential source of X-radiation in solid-state TV receivers, it is specially constructed to prohibit X-radiation emissions. For continued X-radiation protection, the replacement picture tube must be the same type as the original. Also, because the picture tube shields and mounting hardware perform an X-radiation protection function, they must be correctly in place. High voltage must be measured each time servic-

1-1-1 T6300SFTY

ing is performed that involves B+, horizontal deflection or high voltage. Correct operation of the X-radiation protection circuits also must be reconfirmed each time they are serviced. (X-radiation protection circuits also may be called "horizontal disable" or "hold down.") Read and apply the high voltage limits and, if the chassis is so equipped, the X-radiation protection circuit specifications given on instrument labels and in the Product Safety & X-Radiation Warning note on the service data chassis schematic. High voltage is maintained within specified limits by close tolerance safety-related components/adjustments in the high-voltage circuit. If high voltage exceeds specified limits, check each component specified on the chassis schematic and take corrective action.

2. Read and comply with all caution and safety-related notes on or inside the receiver cabinet, on the receiver chassis, or on the picture tube.

3. Design Alteration Warning - Do not alter or add to the mechanical or electrical design of this TV receiver. Design alterations and additions, including, but not limited to circuit modifications and the addition of items such as auxiliary audio and/or video output connections, might alter the safety characteristics of this receiver and create a hazard to the user. Any design alterations or additions will void the manufacturer's warranty and may make you, the servicer, responsible for personal injury or property damage resulting therefrom.

4. Picture Tube Implosion Protection Warning -

The picture tube in this receiver employs integral implosion protection. For continued implosion protection, replace the picture tube only with one of the same type number. Do not remove, install, or otherwise handle the picture tube in any manner without first putting on shatterproof goggles equipped with side shields. People not so equipped must be kept safely away while picture tubes are handled. Keep the picture tube away from your body. Do not handle the picture tube by its neck. Some "in-line" picture tubes are equipped with a permanently attached deflection yoke; because of potential hazard, do not try to remove such "permanently attached" yokes from the picture tube.

5. Hot Chassis Warning -

a. Some TV receiver chassis are electrically connect-

ed directly to one conductor of the AC power cord and maybe safety-serviced without an isolation transformer only if the AC power plug is inserted so that the chassis is connected to the ground side of the AC power source. To confirm that the AC power plug is inserted correctly, with an AC voltmeter, measure between the chassis and a known

earth ground. If a voltage reading in excess of 1.0V is obtained, remove and reinsert the AC power plug in the opposite polarity and again measure the voltage potential between the chassis and a known earth ground.

b. Some TV receiver chassis normally have 85V

AC(RMS) between chassis and earth ground regardless of the AC plug polarity. This chassis can be safety-serviced only with an isolation transformer inserted in the power line between the receiver and the AC power source, for both personnel and test equipment protection.

c. Some TV receiver chassis have a secondary

ground system in addition to the main chassis ground. This secondary ground system is not isolated from the AC power line. The two ground systems are electrically separated by insulation material that must not be defeated or altered.

6. Observe original lead dress. Take extra care to assure correct lead dress in the following areas: a. near sharp edges, b. near thermally hot parts-be sure that leads and components do not touch thermally hot parts, c. the AC supply, d. high voltage, and e. antenna wiring. Always inspect in all areas for pinched, out of place, or frayed wiring. Check AC power cord for damage.

7. Components, parts, and/or wiring that appear to have overheated or are otherwise damaged should be replaced with components, parts, or wiring that meet original specifications. Additionally, determine the cause of overheating and/or damage and, if necessary, take corrective action to remove any potential safety hazard.

8. Product Safety Notice - Some electrical and mechanical parts have special safety-related characteristics which are often not evident from visual inspection, nor can the protection they give necessarily be obtained by replacing them with components rated for higher voltage, wattage, etc.. Parts that have special safety characteristics are identified by a ( ! ) on schematics and in parts lists. Use of a substitute replacement that does not have the same safety characteristics as the recommended replacement part might create shock, fire, and/or other hazards. The Product's Safety is under review continuously and new instructions are issued whenever appropriate. Prior to shipment from the factory, our products are strictly inspected to confirm with the recognized product safety and electrical codes of the countries in which they are to be sold. However, in order to maintain such compliance, it is equally important to implement the following precautions when a set is being serviced.

1-1-2 T6300SFTY

Precautions during Servicing

A. Parts identified by the ( ! ) symbol are critical for

safety.

Replace only with part number specified.

B. In addition to safety, other parts and assemblies

are specified for conformance with regulations applying to spurious radiation. These must also be replaced only with specified replacements.

Examples: RF converters, RF cables, noise blocking capacitors, and noise blocking filters, etc.

C. Use specified internal wiring. Note especially:

1) Wires covered with PVC tubing

2) Double insulated wires

3) High voltage leads

D. Use specified insulating materials for hazardous

live parts. Note especially:

1) Insulation Tape

2) PVC tubing

3) Spacers

4) Insulators for transistors.

E. When replacing AC primary side components

(transformers, power cord, etc.), wrap ends of wires securely about the terminals before soldering.

F. Observe that the wires do not contact heat produc-

ing parts (heatsinks, oxide metal film resistors, fusible resistors, etc.)

G. Check that replaced wires do not contact sharp

edged or pointed parts.

H. When a power cord has been replaced, check that

5~6 kg of force in any direction will not loosen it.

I. Also check areas surrounding repaired locations.

J. Use care that foreign objects (screws, solder drop-

lets, etc.) do not remain inside the set.

K. Crimp type wire connector

When replacing the power transformer in sets where the connections between the power cord and power transformer primary lead wires are performed using crimp type connectors, in order to prevent shock hazards, perform carefully and precisely the following steps.

Replacement procedure

1) Remove the old connector by cutting the wires at a point close to the connector.

Important: Do not re-use a connector (discard it).

2) Strip about 15 mm of the insulation from the ends of the wires. If the wires are stranded, twist the strands to avoid frayed conductors.

3) Align the lengths of the wires to be connected. Insert the wires fully into the connector.

4) Use the crimping tool to crimp the metal sleeve at the center position. Be sure to crimp fully to the complete closure of the tool.

L. When connecting or disconnecting the VCR con-

nectors, first, disconnect the AC plug from AC supply socket.

1-1-3 T6300SFTY

Safety Check after Servicing

Examine the area surrounding the repaired location for damage or deterioration. Observe that screws, parts and wires have been returned to original positions. Afterwards, perform the following tests and confirm the specified values in order to verify compliance with safety standards.

1. Clearance Distance

When replacing primary circuit components, confirm specified clearance distance (d) and (d') between soldered terminals, and between terminals and surrounding metallic parts. (See Fig. 1)

TTable 1 : Ratings for selected area

AC Line Voltage Clearance Distance (d) (d’)

220 to 240 V

Note: This table is unofficial and for reference only. Be sure to confirm the precise values.

2. Leakage Current Test

Confirm the specified (or lower) leakage current between B (earth ground, power cord plug prongs) and externally exposed accessible parts (RF terminals, antenna terminals, video and audio input and output terminals, microphone jacks, earphone jacks, etc.).

≥ 3mm(d)

≥ 6 mm(d’)

Chassis or Secondary Conductor

Primary Circuit Terminals

dd’

Exposed Accessible Part

AC Voltmeter (High Impedance)

Fig. 1

Measuring Method : (Power ON)

Insert load Z between B (earth ground, power cord plug prongs) and exposed accessible parts. Use an AC voltmeter to measure across both terminals of load Z. See Fig. 2 and following table.

TTable 2: Leakage current ratings for selected areas

AC Line Voltage Load Z Leakage Current (i)

2kΩ RES.

Connected in

parallel

220 to 240 V

50kΩ RES.

Connected in

parallel

Note: This table is unofficial and for reference only. Be sure to confirm the precise values.

i≤0.7mA AC Peak

i≤2mA DC

i≤0.7mA AC Peak

i≤2mA DC

One side of

Power Cord Plug Prongs

One side of power cord plug

prongs (B) to:

RF or

Antenna terminals

A/V Input, Output

Fig. 2

1-1-4 T6300SFTY

STANDARD NOTES FOR SERVICING

Circuit Board Indications

1. The output pin of the 3 pin Regulator ICs is indicated as shown:

Top View

Out

2. For other ICs, pin 1 and every 5th pin is indicated as shown:

Pin 1

3. The 1st pin of every pin connector are indicated as shown:

Pin 1

Input

Bottom View

How to Read the Values of the Rectangular Type Chip Components

Example: (a) Resistor

473

= 473 = 47 [kΩ]

(b) Capacitor

= Not Shown

Caution:

Once chip parts (Resistors, Capacitors, Transistors, etc.) are removed, they must not be reused. Always use a new part.

Replacement Procedures for

(Top View)

Instructions for Connectors

1. When you connect or disconnect FFC cable (connector), be sure to disconnect the AC cord.

2. FFC cable (connector) should be inserted parallel into the connector, not at an angle.

FFC Cable

Connector

CBA

* Be careful to avoid a short circuit.

[ CBA= Circuit Board Assembly ]

Leadless (Chip) Components

The Following Procedures are Recommended for the Replacement of the Leadless Components Used in this Unit.

1. Preparation for replacement

a. Soldering Iron

Use a pencil-type soldering iron (less than 30 watts).

b. Solder

Eutectic solder (Tin 63%, Lead 37%) is recommended.

c. Soldering time

Do not apply heat for more than 4 seconds.

d. Preheating

Leadless capacitor must be preheated before installation. (130°C~150°C, for about two minutes.)

Notes:

a. Leadless components must not be reused after

removal.

b. Excessive mechanical stress and rubbing for the

component electrode must be avoided.

2. Removing the leadless component

Grasp the leadless component body with tweezers and alternately apply heat to both electrodes. When the solder on both electrodes has melted, remove leadless component with a twisting motion.

1-2-1 SFTY_5

Notes:

a. Do not attempt to lift the component off the board

until the component is completely disconnected from the board by the twisting action.

b. Take care not to break the copper foil on the printed

board

3. Installing the leadless component

a. Presolder the contact points of the circuit board.

b. Press the part downward with tweezers and solder

both electrodes as shown below.

Note:

Do not glue the replacement leadless component to the circuit board.

Tweezers

Chip

Soldering Iron

Tweezers

Solder

Soldering Iron

2. The Flat Pack-IC on the CBA is affixed with glue, so be careful not to break or damage the foil of each pin or solder lands under the IC when removing it.

1. Removal

With Hot - Air Flat Pack - IC Desoldering Machine:

a. Prepare the Hot - Air Flat Pack - IC Desoldering

Machine, then apply hot air to Flat Pack - IC (about 5~6 seconds). (Fig. S-1-1)

b. Remove the Flat Pack- IC with tweezers while

applying the hot air.

With Soldering Iron:

a. Using desoldering braid, remove the solder from all

pins of the Flat Pack - IC. When you use solder flux which is applied to all pins of the Flat Pack - IC, you can remove it easily. (Fig. S-1-3)

b. Lift each lead of the Flat Pack - IC upward one by

one, using a sharp pin or wire to which solder will not adhere (iron wire). When heating the pins, use a fine tip soldering iron or a hot air Desoldering Machine. (Fig. S-1-4)

With Iron Wire:

a. Using desoldering braid, remove the solder from all

pins of the Flat Pack - IC. When you use solder flux which is applied to all pins of the Flat Pack - IC, you can remove it easily. (Fig. S-1-3)

b. Affix the wire to a workbench or solid mounting

point, as shown in Fig. S-1-5.

c. Pull up on the wire as the solder melts so as to lift

the IC leads from the CBA contact pads, while heating the pins using a fine tip soldering iron or hot air blower.

Note:

When using a soldering iron, care must be taken to ensure that the Flat Pack - IC is not being held by glue, or when it is removed from the CBA, it may be damaged if force is used.

Presolder

How to Remove / Install Flat Pack IC

Caution:

1. Do not apply the hot air to the chip parts around the Flat Pack-IC for over 6 seconds as damage may occur to the chip parts. Put Masking Tape around the Flat Pack-IC to protect other parts from damage. (Fig. S-1-2)

2. Installation

a. Using desoldering braid, remove the solder from

the foil of each pin of the Flat Pack - IC on the CBA, so you can install a replacement Flat Pack - IC more easily.

b. The "I " mark on the Flat Pack - IC indicates pin 1

(See Fig. S-1-6). Make sure this mark matches the 1 on the CBA when positioning for installation. Then pre - solder the four corners of the Flat PackIC (See Fig. S-1-7).

c. Solder all pins of the Flat Pack - IC. Make sure that

none of the pins have solder bridges.

1-2-2 SFTY_5

Hot Air Blower

Iron Wire

CBA

Masking Tape

Tweezers

Flat Pack-IC

Fig. S-1-1

Hot-air Flat Pack-IC Desoldering Machine

Flat Pack-IC

Fig. S-1-2

Desoldering Braid

To Solid Mounting Point

Example :

Pin 1 of the Flat Pack-IC is indicated by a " " mark.

Presolder

Soldering Iron

Fig. S-1-5

Fig. S-1-6

Fine Tip Soldering Iron

Soldering Iron

Fig. S-1-3

Flat Pack-IC

CBA

Fig. S-1-7

Sharp Pin

Fig. S-1-4

1-2-3 SFTY_5

Instructions for Handling Semiconductors

Electrostatic breakdown of the semiconductors may occur due to a potential difference caused by electrostatic charge during unpacking or repair work.

Ground for Human Body

Be sure to wear a grounding band (1MΩ) that is properly grounded to remove any static electricity that may be charged on the body.

Ground for Work Bench

Be sure to place a conductive sheet or copper plate with proper grounding (1MΩ) on the work bench or other surface, where the semiconductors are to be placed. Because the static electricity charge on the clothing will not escape through the body grounding band, be careful to avoid contacting semiconductors to clothing.

1MΩ

CBA

Grounding Band

1MΩ

CBA

Conductive Sheet or Copper Plate

1-2-4 SFTY_5

PREPARATION FOR SERVICING

How to Enter the Service Mode

Caution: 1

1. Optical sensors system are used for Tape Start and End Sensor on this equipment. Read this page carefully and prepare as described on this page before starting to service; otherwise, the unit may operate unexpectedly.

Preparing: 1

1. Cover Q202 (START SENSOR) and Q201 (END SENSOR) with Insulation Tape or enter the service mode to activate Sensor Inhibition automatically.

Note: Avoid playing, rewinding or fast forwarding the tape to its beginning or end, because both Tape End Sensors are not active.

How to Enter the Service Mode

1. Turn the power on. (Use main power on the TV unit.)

2. Press [STANDBY/ON], [2], [7], [1], and [MUTE] buttons on the remote control unit in that order within 5 seconds. When entering the service mode, “4” will display at corners of the screen.

3. During the service mode, electrical adjustment mode can be selected by remote control key.

Details are as follows.

Key Adjustment Mode

Picture adjustment mode: Press the MENU button to change from BRT (Bright), *CNT (Contrast), *COL

(Color), *TNT(Tint) and SHP(SHARP). Press P+/P- key to adjust Initial Value. *Marked items are not necessary to adjust normally.

SECAM Black Level adjustment mode: See adjustment instructions page 1-6-4. Cut-Off adjustment mode: See adjustment instructions page 1-6-5. White Balance adjustment mode: See adjustment instructions page 1-6-6.

C-Trap adjustment mode: See adjustment instructions page 1-6-3.

DSPC adjustment mode: See adjustment instructions page 1-6-3.

H adjustment mode: See adjustment instructions page 1-6-2.

Head switching point adjustment mode (Auto adjustment): See adjustment instructions page 1-6-8.

Auto record mode: Perform recording (15 Sec.)-->Stop-->Rewind (Zero return) automatically.

Key Adjustment Mode

Head switching point adjustment mode

Caution: 2

1. The deck mechanism assembly is mounted on the Main CBA directly, and SW211 (REC-SAFETY SW) is mounted on the Main CBA. When deck mechanism assembly is removed from the Main CBA due to servicing, this switch can not be operated automatically.

(Manual adjustment): See adjustment instructions page 1-6-8.

H. Shift adjustment mode: See adjustment instructions page 1-6-5.

V.size/V. shift adjustment: See adjustment instructions page 1-6-4.

Preparing: 2

1. To eject the tape, press the STOP/EJECT button on the unit (or Remote Control).

2. When you want to record during the Service mode, press the Rec button while depressing SW211 (REC-SAFETY SW) on the Main CBA.

Q201 (END SENSOR)

SW211 (REC-SAFETY SW)

Q202 (START SENSOR)

MAIN CBA

1-3-1 T6400PFS

OPERATING CONTROLS AND FUNCTIONS

1-4-1 T6400IB

1-4-2 T6400IB

CABINET DISASSEMBLY INSTRUCTIONS

1. Disassembly Flowchart

This flowchart indicates the disassembly steps for the cabinet parts, and the CBA in order to gain access to item(s) to be serviced. When reassembling, follow the steps in reverse order. Bend, route and dress the cables as they were.

Caution !!

When removing the CRT, be sure to discharge the Anode Lead of the CRT with the CRT Ground Wire before removing the Anode Cap.

[1] Rear Cabinet

[2] Power Unit and Tray Chassis Unit

[5] H.V./Power

Supply CBA

[3] Power Unit

[4] Tray Chassis Unit

[6] Top Shield

[7] Bottom Plate

[8] Deck Unit

[9] Text CBA

[10] Main CBA

[11] CRT

2. Disassembly Method

REMOVAL

ID/

LOC.

No.

[1]

[2]

[3] Power Unit 3,5

[4]

[5]

PAR T

Rear Cabinet

Power Unit and Tray Chassis Unit

Tr ay Chassis Unit

H.V./Power Supply CBA

REMOVE/ *UNHOOK/

Fig.

UNLOCK/RELEASE/

No.

UNPLUG/DESOLDER

4(S-1), 2(S-2),

1,2,5

*CN804

Anode Cap, *CN501,

3,4,5

*CN551, *CN601, CRT CBA

*CN502, *CN552, *CN602

3 ---------- -

36(S-3) 4

Note

REMOVAL

ID/

LOC.

No.

[6] Top Shield 3 5(S-4), CL604 5

[7]

[8] Deck Unit 3, 5

[9] Text CBA 3, 5

[10] Main CBA 3 4(S-10) 9

[11] CRT 4 4(S-11) 10

↓

(1)

(1): Order of steps in Procedure. When reassembling,

(2): Parts to be removed or installed. (3): Fig. No. showing Procedure of Part Location. (4): Identification of part to be removed, unhooked,

(5): Refer to the following "Reference Notes in the

PAR T

Bottom Plate

↓

(2)

follow the steps in reverse order.These numbers are also used as the identification (location) No. of parts in Figures.

unlocked, released, unplugged, unclamped, or desoldered. S=Screw, P=Spring, L=Locking Tab, CN=Connector, *=Unhook, Unlock, Release, Unplug, or Desolder

2(S-2) = two Screw (S-2)

Table."

REMOVE/ *UNHOOK/

Fig.

UNLOCK/RELEASE/

No.

UNPLUG/DESOLDER

3(S-5) 6

7(S-6), (S-7), (S-8), Desolder *(CN201, CL401, CL402, CL403)

(S-9), *CN751, *CN752

↓

(3)

↓

(4)

Note

↓

(5)

Reference Notes in the Table

1. Removal of the Rear Cabinet. Remove four screws (S-1) and two screws (S-2). Disconnect connector CN804 and remove the Rear Cabinet.

Caution !!

Discharge the Anode Lead of the CRT with the CRT Ground Wire before removing the Anode Cap.

2. Removal of the Power Unit and Tray Chassis Unit. Discharge the Anode Lead of the CRT with the CRT Ground before removing the Anode Cap. Disconnect the following: Anode Cap, CN501, CN551, CN601, and CRT CBA. Then pull the Power Unit and Tray Chassis Unit out backward.

1-5-1 T6400DC

3. Removal of the Power Unit. Disconnect connectors CN502, CN552, and CN602. Then slide the Power Unit out.

4. Removal of the H.V./Power Supply CBA. Remove six screws (S-3) and pull up the H.V./ Power Supply CBA.

5. Removal of the Top Shield. Remove five screws (S-4) and CL604, and remove the Top Shield.

6. Removal of the Bottom Plate. Remove a screw (S-5). Then slide the Bottom Plate out front.

S-2

7. Removal of the Deck Unit. Remove seven screws (S-6), screw (S-7) and screw (S-8). Then, desolder connectors (CN201, CL401, CL402, CL403) and lift up the Deck Unit.

8. Removal of the Text CBA. Remove screw (S-9), and disconnect connectors CN751 and CN752. Then, lift the Text CBA up.

9. Removal of the Main CBA. Remove four screws (S-10) and pull up the Main CBA.

10.Removal of the CRT. Remove four screws (S-11) and pull the CRT backward.

S-1

[1] REAR CABINET

S-2

EXT1/AV1

S-1

S-2

Fig. 1

S-1

S-2

S-1

[1] REAR CABINET

Fig. 2

1-5-2 T6400DC

[2] Power Unit and Tray Chassis Unit

S-4

S-3

[5] H.V./Power Supply CBA

[3] Power Unit

S-3

S-6

[10] MAIN CBA

S-10

S-7

S-6

S-10

S-4

S-10

S-8

CL604

[6] Top Shield

S-6

[8] DECK UNIT

[9] TEXT CBA

S-9

Text Holder

S-10

[4] Tray Chassis Unit

[7] Bottom Plate

S-5

Fig. 3

1-5-3 T6400DC

S-11

Anode Cap

CRT CBA

S-11

[11] CRT

S-11

Fig. 4

1-5-4 T6400DC

ANODE

CRT

GND

CRT CBA

CN501B

SCREEN

CN502

H.V./POWER SUPPLY CBA

CN552

CL501A

FOCUS

CN501

CN551

TO SPEAKER

MAIN CBA

CN804

CN601 TO DEGAUSS COIL

CL403

CL401

CL402

CN201

CN751

CL603A

CN602

CL302A

CL301A

CN752

TEXT CBA

CN901

CN902

FE HEAD

CYLINDER ASSEMBLY

CAPSTAN MOTOR

AC HEAD ASSEMBLY

DECK UNIT

Fig. 5

1-5-5 T6400DC

ELECTRICAL ADJUSTMENT INSTRUCTIONS

General Note:

"CBA" is abbreviation for "Circuit Board Assembly."

NOTE:

Electrical adjustments are required after replacing circuit components and certain mechanical parts. It is important to perform these adjustments only after all repairs and replacements have been completed. Also, do not attempt these adjustments unless the proper equipment is available.

Test Equipment Required

1. PAL Pattern Generator (Color Bar, Monoscope, Black Raster, White Raster, Sympte)

2. SECAM Pattern Generator (Gray Scale)

3. AC Milli Voltmeter (RMS)

4. Alignment Tape (FL6A), Blank Tape (E180)

5. DC Voltmeter

6. Oscilloscope: Dual-trace with 10:1 probe,

V-Range: 0.001~50V/Div, F-Range: DC~AC-60MHz

7. Frequency Counter

8. Plastic Tip Driver

9. RF input (at each broadcasting system) Receiving Channel : VHF Low Input level : 80dBµV

10.Ext.input FRONT VIDEO-IN JACK or REAR SCART JACK

How to set up the option code

1. Enter the Service mode.

2. Press the [STATUS/EXIT] button on the remote control unit. The option code appears on the display.

3. If needed, input the option code as shown below using number buttons on the remote control unit.

Model Option Code

14PV120(125)(422)(425)/07 0128

14PV225/07 0176

14PV374(375)/07 2992

14PV125(422)/01 0130

14PV225/01

14PV374(375)/01

14PV125(422)/58 0131

14PV225/58 0179

14PV374(375)/58 2995

14PV125(422)/39 0129

14PV225/39 0177

14PV374(375)/39 2961

4. To reset the software, press [PAUSE] and [5] buttons on the remote control unit. The option code is changed.

0178

0242 (Greek)

2994

3058 (Greek)

How to Set up the Service mode:

NOTE:

After replacing the IC202 (Memory) or Main CBA, the set value in IC202 (Memory) will be lost. So it is necessary to set up or adjust in the Service mode after its replacement.

Service Mode:

1. Turn the power on. (Use main power on the TV unit.)

2. Press [STANDBY/ON], [2], [7], [1], and [MUTE] buttons on the remote control unit in that order within 5 seconds.

- To cancel the service mode, press [STANDBY/ON] button on the remote control.

1-6-1 T6400EA

1. DC 105V (+B) Adjustment

2. H Adjustment

Purpose: To obtain correct operation.

Symptom of Misadjustment: The picture is dark and

unit does not operate correctly.

Test point Adj. Point Mode Input

TP503

(+B),

TP504

(GND)

Tap e M. EQ . S p ec .

---

Note: TP503(+B), TP504(GND), VR601 --- H.V./ Power Supply CBA

1. Connect the unit to AC Power Outlet. (exact AC230V)

2. Input a color bar signal from RF (or Ext.) input and leave it for at least 20 minutes.

3. Connect DC Volt Meter to TP503(+B) and TP504(GND).

4. Adjust VR601 so that the voltage of TP503(+B) becomes +105±0.5V DC.

VR601

DC Voltmeter,

Plastic Tip Driver

(or Ext.)

+105±0.5V DC

Color

Bar

Purpose: To get correct horizontal position and size of screen image.

Symptom of Misadjustment: Horizontal position and size of screen image may not be properly displayed.

Test point Adj. Point Mode Input

R590

Tape M. EQ. Spec.

--- Frequency Counter 15.625kHz±75Hz

Note: R590 --- H.V./Power Supply CBA

1. Connect Frequency Counter to R590.

2. Set the unit to the Ext. mode and no input is necessary. Enter the Service mode. (See page 1-6-1.)

3. Operate the unit for at least 20 minutes.

4. Press [2] button on the remote control unit and select H-Adj Mode.

5. Press [P+/P-] buttons on the remote control unit so that the display will change [0] to [7.] At this moment, choose display [0] to [7] when the Frequency counter display is closest to

15.625kHz±75Hz.

6. Turn the power off and on again.

P+/P-

buttons

Ext. ---

1-6-2 T6400EA

3. C-Trap Adjustment

Purpose: To get minimum leakage of the color signal

carrier.

Symptom of Misadjustment: If C-Trap Adjustment is incorrect, stripes will appear on the screen.

Test point Adj. Point Mode Input

4. To enter the DSPC mode, press [1] button on the remote control unit. Recording starts automatically and “DSPC” appears on the display.

TVCR

DSPC

J349F3

(B-OUT)

Ta pe M . E Q . Sp ec .

---

minimum

Note: J349F3 (B-Out)--- Main CBA

1. Connect Oscilloscope to J349F3.

2. Input a color bar signal from RF (or Ext.) input. Enter the Service mode. (See page 1-6-1.)

3. Press [0] button on the remote control unit and select C-TRAP Mode.

4. Press [P+/P-] buttons on the remote control unit so that the carrier leakage B-Out (4.43MHz) value becomes minimum on the oscilloscope.

5. Turn the power off and on again.

P+/P-

buttons

Oscilloscope,

Pattern Generator

Figure

(or Ext.)

200mVp-p Max.

Color Bar

Fig. 1

VIDEO INPUT JACK (Ext. input)

5. Recording continues for 10 seconds in SP mode. Note: Since the reference value of LP V-ENV is computed from the reference value of SP V-ENV, there is no need to survey it.

6. The tape is rewinded to the recording start point.

7. The unit enters the play mode automatically and the V-ENV levels of each the reference value of SP mode and the computing value of LP mode are memorized into the EEPROM.

8. "OK" or "NG" appears on upper left corner of the screen with blueback. In case of "OK": "OK" (green) is indicated without ejecting tape. In case of "NG": "NG" (red) is indicated with ejecting tape.

TVCR TVCR

Fig. 2

4. How to measure the standard V-ENV value of Digital Studio Picture Control

Purpose: To set the recording condition appropriate

for the recording tape.

Symptom of Misadjustment: Recording or playing back picture quality may fall. The picture will be tinted.

1. Insert a new tape (type: E180) for the DSPC alignment into the TV/VCR.

2. Input the black raster signal from the video input jack (VIDEO-IN).

3. Enter the Service Mode. (See page 1-6-1.)

Normal

1-6-3 T6400EA

Abnormal

Fig. 3

5. SECAM Black Level Adjustment

6. V. Size Adjustment

Purpose: To set Black Level of the SECAM signal R-

Y/B-Y to Ref. level.

Symptom of Misadjustment: If Black Level of the SECAM signal R-Y/B-Y is incorrect, the picture is bluish or reddish in grayscale compared with PAL signal.

Te st

point

J361G4

Tape M. EQ. Spec.

---

Analog Oscilloscope (unus-

able Digital Oscilloscope)

1. Degauss the CRT and allow CRT to operate for 20 minutes before starting the alignment.

2. Input the SECAM Gray Scale signal from Ext. input.

3. Enter the Service Mode. (See page 1-6-1.)

4. To enter the C/D/S mode, press [ -] on the remote control unit.

5. To select SBR (SECAM Black Level R-Y), press [6] button on the remote control unit.

6. Press [P+/P-] buttons to adjust Y signal to the black ref. level.

7. To select SBB (SECAM Black Level B-Y), press [7] button on the remote control unit.

8. Press [P+/P-] buttons to adjust Y signal to the black ref. level.

Y Signal

Adj. Point Mode Input

P+/P-

buttons

Pattern Generator,

Ext.

SECAM

Gray

Scale

---

Purpose: To obtain correct vertical height of screen image.

Symptom of Misadjustment: If V. Size is incorrect, vertical height of image on the screen may not be properly displayed.

Test point Adj. Point Mode Input

Screen

Tape M. EQ. Spec.

--- Pattern Generator 90±5%

1. Enter the Service mode. (See page 1-6-1.) Press [9] button on the remote control unit and select V-S Mode. (Press [9] button then display will change to V-P and V-S).

2. Input monoscope pattern and leave it for at least 20 minutes.

3. Press [P+/P-] buttons on the remote control unit so that the monoscope pattern is 90±5% of display size and the circle is round.

P+/P-

buttons

(or Ext.)

Monoscope

7. V. Shift Adjustment

Purpose: To obtain correct vertical position of screen

image.

Symptom of Misadjustment: If V. position is incorrect, vertical position of image on the screen may not be properly displayed.

Test point Adj. Point Mode Input

Screen

Tape M. EQ. Spec.

P+/P-

buttons

(or Ext.)

Monoscope

Black REF. Level

5mV/Div (10:1 Prove)

Fig. 4

--- Pattern Generator 90±5%

1. Enter the Service mode. (See page 1-6-1.) Press [9] button on the remote control unit and select V-P Mode. (Press [9] button then display will change to V-P and V-S).

2. Input monoscope pattern and leave it for at least 20 minutes.

3. Press [P+/P-] buttons on the remote control unit so that the top and bottom of the monoscope pattern are equal to each other.

1-6-4 T6400EA

8. H. Shift Adjustment

Purpose: To obtain correct horizontal position and

size of screen image.

Symptom of Misadjustment: Horizontal position and size of screen image may not be properly displayed.

Test point Adj. Point Mode Input

Screen

Tape M. EQ. Spec.

--- Pattern Generator 90±5%

1. Enter the Service mode. (See page 1-6-1.) Press [8] button on the remote control unit and select H-P Mode.

2. Input monoscope pattern and leave it for at least 20 minutes.

3. Press [P+/P-] buttons on the remote control unit so that the left and right side of the monoscope pattern are equal to each other.

4. Turn the power off and on again.

P+/P-

buttons

(or Ext.)

Monoscope

6. Turn the screen control up until dimmed horizontal line appears.

7. Press the [P+/P-] buttons until the horizontal line becomes white.

8. To enter the CUT OFF (G) mode, press [2] button on the remote control unit.

9. Press the [P+/P-] buttons until the horizontal line becomes white.

10.To enter the CUT OFF (B) mode, press [3] button on the remote control unit.

11.Press the [P+/P-] buttons until the horizontal line becomes white.

12.Turn the screen control so that the horizontal line adjusted white looks lightly.

13.Turn the power off and on again.

9. Cut-off Adjustment

Purpose: To adjust the beam current of R, G, B, and

screen voltage.

Symptom of Misadjustment: White color may be reddish, greenish or bluish.

Test point Adj. Point Mode Input

Screen

Tape M. EQ. Spec.

--- Pattern Generator

Notes:

Screen Control (FBT) --- H.V./Power Supply CBA FBT= Fly Back Transformer Use the Remote Control Unit

1. Degauss the CRT and allow CRT to operate for 20 minutes before starting the alignment.

2. Set the screen control to minimum position. Input the Black raster signal from RF (or Ext.) input.

3. Enter the Service Mode. (See page 1-6-1.) Dimmed horizontal line appears on the CRT.

4. To enter the C/D/S mode, press the [ -] button on the remote control unit.

5. To enter the CUT OFF (R) mode, press [1] button on the remote control unit.

Screen-Control,

P+/P- buttons

(or Ext.)

See Reference

Notes below

Black

Raster

1-6-5 T6400EA

10. White Balance Adjustment

11. Sub-Brightness Adjustment

Purpose: To mix red, green and blue beams correctly

for pure white. Symptom of Misadjustment: White becomes bluish

or reddish.

Test point Adj. Point Mode Input

Screen

Ta p e M . EQ . S pe c.

---

Screen-Control,

P+/P- buttonsRF(or Ext.)

Pattern Generator,

Color analyzer

Figure

Color Ajalyzer

See below

White

Raster

(APL 100%)

Fig. 5

Purpose: To get proper brightness. Symptom of Misadjustment: If Sub-Brightness is

incorrect, proper brightness cannot be obtained by adjusting the Brightness Control.

Test point Adj. Point Mode Input

Screen

Tape M. EQ. Spec.

---

White

P+/P-

buttons

Pattern

Generator

Figure

(or Ext.)

See below

ABC

SYMPTE

Black

This bar (A) just visible

Note: Use remote control unit

1. Operate the unit more than 20 minutes.

2. Face the unit to east. Degauss the CRT using Degaussing Coil.

3. Input the White Raster (APL 100%).

4. Set the color analyzer to the CHROMA mode and after zero point calibration, bring the optical receptor to the center on the tube surface (CRT).

5. Enter the Service mode. Press [ -] button on the remote control.

6. Press [4] button on the remote control unit for Red adjustment. Press [5] button on the remote control unit for Blue adjustment.

7. In each color mode, Press [P+/P-] buttons to adjust the values of color.

8. Adjusting Red and Blue color so that the temperature becomes 8500K (x : 290 / y : 300) ±3%.

9. At this time, Re-check that Horizontal line is white. If not, Re-adjust Cut-off Adjustment until the Horizontal Line becomes pure white.

10. Turn off and on again to return to normal mode. Receive APL 100% white signal and Check Chroma temperatures become 8500K (x : 290 / y : 300) ±3%.

Note: Confirm that Cut Off Adj. is correct after this adjustment, and attempt Cut Off Adj. if needed.

Fig. 6

Note: Bar (A) in Fig. 7 --- 0 IRE

1. Enter the Service Mode. (See page 1-6-1.) Then input SYMPTE signal from RF (or Ext.) input and leave it for at least 20 minutes.

2. Press MENU button. (Each time MENU button is pressed, display will change BRT, CNT, COL, TNT, and SHP in that order.) Select BRT and press [P+/ P-] buttons so that the bar (A) in Fig. 6 is just visible.

3. Turn the power off and on again.

1-6-6 T6400EA

12. Setting for CONTRAST, COLOR, TINT and SHARP Data Values

General

1. Enter the Service mode. (See page 1-6-1)

2. Press MENU button. (Each time MENU button is pressed, display will change BRT, CNT, COL, TNT, and SHP in that order.)

CONTRAST (CNT)

1. Press "MENU" button on the remote control unit. Then select CNT display.

2. Press [P+/P-] buttons on the remote control unit so that the value of "CONTRAST" (CNT) becomes 83.

COLOR (COL)

1. Press "MENU" button on the remote control unit. Then select "COLOR" (COL) display.

2. Press [P+/P-] buttons on the remote control unit so that the value of "COLOR" (COL) becomes 65.

TINT (TNT)

1. Press "MENU" button on the remote control unit. Then select "TINT" (TNT) display.

2. Press [P+/P-] buttons on the remote control unit so that the value of "TINT" (TNT) becomes 68.

SHARP (SHP)

1. Press "MENU" button on the remote control unit. Then select "SHARP" (SHP) display.

2. Press [P+/P-] buttons on the remote control unit and select "1."

13. Focus Adjustment

Purpose: Set the optimum Focus.

Symptom of Misadjustment: If Focus Adjustment is

incorrect, blurred images are shown on the display.

Test point Adj. Point Mode Input

Screen Focus Control

Tap e M. EQ . Sp ec .

--- Pattern Generator See below.

Note: Focus VR (FBT) --- H.V./Power Supply CBA

FBT= Fly Back Transformer

1. Operate the unit more than 30 minutes.

2. Face the unit to the East and degauss the CRT using a Degaussing Coil.

3. Input the monoscope pattern.

4. Adjust the Focus Control on the FBT to obtain clear picture.

(or Ext.)

Monoscope

1-6-7 T6400EA

14. Head Switching Position Adjustment

Purpose: Determine the Head Switching Point during

Playback.

Symptom of Misadjustment: May cause Head Switching Noise or Vertical Jitter in the picture.

Note: Unit reads Head Switching Position automatically and displays it on the screen (Upper Left Corner).

Manual Adjustment

1. Enter the Service Mode. (See page 1-6-1.)

2. Playback the test tape (FL6A).

3. Press the number [5] button on the remote control unit.

4. The Head Switching position will display on the screen; if adjustment is necessary follow step 4.

7.0H (448µs) is preferable.

5. Press [P+/P-] buttons on the remote control unit if necessary. The value will be changed in 0.5H steps up or down. Adjustable range is up to 9.5H. If the value is beyond adjustable range, the display will change as:

Lower out of range: 0.0H Upper out of range: -.-H

6. Turn the power off and on again.

Auto Adjustment

1. Load the test tape (FL6A) that have been recorded the Head Switching Position Value.

2. Enter the service mode.

3. Press [3] button on the remote control unit in the tape stop mode. The unit playback and adjust the Head Switching Position automatically.

4. The adjusting report appears on upper left corner of the screen with blueback. In case of adjusting correctly: the Head Switching Position Value recorded in the test tape (FL6A) is indicated with green. In case of adjusting incorrectly: "NG" (red) is indicated with ejecting tape.

TVCR TVCR

7.0H

Correct

Incorrect

Fig. 7

1-6-8 T6400EA

Adjustment Points and Test Points

H.V./Power Supply CBA Top View

Focus-control (Upper side)

R590 (H Adjustment)

VR601 +B ADJ

Main CBA Top View

TP007 N-A-PB

TP002 RF-SW

TP001 CTL

Screen-control (Lower side)

TP503 +B

TP504 GND

J361G4

(SECAM Black Level Adjustment)

TP008

IC202

C-PB

TP003 V-OUT

J349F3 B-OUT

TEST POINT INFORMATION

: Indicates a test point with a jumper wire across a hole in the PCB.

TEST POINTS NOT USED IN ELECTRICAL ADJUSTMENTS

Test Point

TP001

TP002

TP008

TP503

TP504

Mechanical Alignment Procedures

Electrical Adjustment Instructions

Used in: Page No.

2-3-3

2-3-3, 2-3-4

1-6-1

1-6-9 T6400EA

Servo/System Control Block Diagram

(DECK ASSEMBLY)

MAIN CBA

BLOCK DIAGRAMS

NOTE FOR WIRE CONNECTORS:

1. PREFIX SYMBOL "CN" MEANS CONNECTOR. (CAN DISCONNECT AND RECONNECT.)

2. PREFIX SYMBOL "CL" MEANS WIRE-SOLDER HOLES OF THE PCB. (WIRE IS SOLDERED DIRECTLY.)

D201 S-LED

AL+5V

TEST POINT INFORMATION

RS201

:INDICATES A TEST POINT WITH A JUMPER WIRE ACROSS A HOLE IN THE PCB. :USED TO INDICATE A TEST POINT WITH A COMPONENT LEAD ON FOIL SIDE. :USED TO INDICATE A TEST POINT WITH NO TEST PIN. :USED TO INDICATE A TEST POINT WITH A TEST PIN.

IC201

(SERVO/SYSTEM CONTROL)

REMOTE SENSOR

REMOTE

KEY-1

KEY-2

Comparison Chart of Models & Marks

Model Mark

14PV374/07 14PV375/07 14PV374/01 14PV375/01

14PV374/58

SW201 SW205

KEY SWITCH

SW206 SW210

KEY SWITCH

14PV375/58 14PV374/39 14PV375/39 H

A B C D

E F G

AC HEAD ASSEMBLY

CONTROL HEAD

CYLINDER ASSEMBLY

PG SENSOR

DRUM MOTOR

LOADING MOTOR

CL402 2CTL(+) 1CTL(-)

SENSOR CBA (ST-SENSOR)

Q202 Q205Q201

ST-SENS.

END-SENS.

SENSOR CBA (END-SENSOR)

CAPSTAN MOTOR

C-CONT

D-PFG

TIMER+5V

CN201 1CM+12V/20.5V 2P-ON+5V(3) 3C-FG

4C-F/R

5 6FG-GND 7LD-CONT 8D-CONT

9 10M-GND 11AL+12V(1) 12VG

T-REEL

WF3

CTL

SW212 LD-SW

PI201

S-REEL

Q204

RESET

CM+12V/20.5V P-ON+5V(3)

AL+12V(1)

TP001

AL+5V

+33V

CTL AMP-OUT

97 95

CTL(+) CTL(-)

LD-SW9

ST-SENS.

END-SENS. T-REEL

S-REEL

RESET

C-FG

C-F/R

C-CONT

LD-CONT

D-CONT

D-PFG

C-POWER-SW

P-ON-H

P-DOWN-L

REC LED

SCL

SDA

I2C-OPEN

SP-MUTE

A-MUTE-H

1ST-SND-H

EXT-L

SCART-H

SCART-MUTE

REC-SAFETY

A,C,E,G

DAVN-L

D-REC-H

C-SYNC

DV-SYNC

V-ENV

C-ROTA

RF-SW

B, D, F, H

TRICK-H

SECAM-H

67 85

20 21 42 48 29

74 13

15 18

33 32

C-POWER-SW

P-ON-H

P-DOWN-L

D202 REC

AL+5V

D204 STANDBY

(MEMORY)

IC202

SCL

SDA

SCL

SDA

I2C-OPEN

SCL

SDA

SP-MUTE

A-MUTE-H

1ST-SND-H

EXT-L

SCART-H

SCART-MUTE

SW211

REC SAFETY

SCL

SDA

DAVN-L

D-REC-H

C-SYNC

DV-SYNC

V-ENV

C-ROTA

RF-SW

TRICK-H

SECAM-H

FROM/TO POWER SUPPLY BLOCK

FROM/TO CHROMA BLOCK

FROM/TO AUDIO BLOCK

FROM/TO VIDEO BLOCK

1-7-1 1-7-2 T6400BLS

Video Block Diagram

" " = SMD

TO CHROMA BLOCK

TU001

VIDEO OUT

TU002

VIDEO OUT

JK701 V-IN

JK703

V-IN

V-OUT

TO CHROMA BLOCK

MAIN CBA

TU1-VIDEO

VIDEO

NOTE FOR WIRE CONNECTORS:

1. PREFIX SYMBOL "CN" MEANS CONNECTOR. (CAN DISCONNECT AND RECONNECT.)

2. PREFIX SYMBOL "CL" MEANS WIRE-SOLDER HOLES OF THE PCB. (WIRE IS SOLDERED DIRECTLY.)

C-VIDEO

IC401

(VIDEO/AUDIO SIGNAL PROCESS)

WF4

Q705

BUFFER

Q703

BUFFER

WF5

TP003

V-OUT

Q401

BUFFER

50 52 54 56

TUNER1

TUNER2

SCART

PB/EE

TUNER1

TUNER2

PB/EE

MUTE

TEST POINT INFORMATION

BYPASS

LINE

SCART

LINE

MUTE

58 59

FROM /TO SERVO/SYSTEM CONTROL BLOCK

Y. DELAY

AGC

CHARA. INS.

1/2

FBC

AGC VXO

DAVN-L SDA SCL

LUMINANCE SIGNAL PROCESS

Y/C MIX

REC-VIDEO SIGNAL PB-VIDEO SIGNAL MODE: SP/REC

69684643

7978

SERIAL

DECORDER

CCD 1H DELAY

CHROMINANCE SIGNAL PROCESS

R P R P

2928 44

6 7

REC FM AGC

PB-H OUT

IC101 (VPS)

DAVN-L SDA SCL

VPS-V

SP HEAD AMP

D-REC-H

RF-SW/C-ROTA

D-V-SYNC

C-SYNC

V-ENV

A,C,E,G

96 95 93 94

70 62

84 67

WF1

TP002

RF-SW

Comparison Chart of Models & Marks

14PV374/07 14PV375/07 14PV374/01 14PV375/01

14PV374/58 14PV375/58 14PV374/39 14PV375/39 H

(DECK ASSEMBLY)

CL401

V(R)

V-COM

V(L)

2 3

D-REC-H

RF-SW

C-ROTA

D-V-SYNC

V-ENV

C-SYNC

TRICK-H

SECAM-H

IC471 (PAL/SECAM DECTECOTR)

CYLINDER ASSEMBLY

FROM/TO SERVO/SYSTEM CONTROL BLOCK

B, D, F, H

Model Mark

A B C D

E F G

VIDEO (R) HEAD

VIDEO (L) HEAD

29 17 12

16 14

PAL/SECAM

DETECTOR

TP010

GND

X401

4.43MHz

WF2

TP008

C-PB

WF6

1-7-3 1-7-4 T6400BLV

Audio Block Diagram

NOTE FOR WIRE CONNECTORS:

1. PREFIX SYMBOL "CN" MEANS CONNECTOR. (CAN DISCONNECT AND RECONNECT.)

" " = SMD

2. PREFIX SYMBOL "CL" MEANS WIRE-SOLDER HOLES OF THE PCB. (WIRE IS SOLDERED DIRECTLY.)

TEST POINT INFORMATION

PB-AUDIO SIGNAL REC-AUDIO SIGNAL Mode : SP/REC

TU001

AUDIO OUT

TU002

JK702 A-IN

A-IN

A-OUT

JK703

Q701

(DECK ASSEMBLY)

IC702 (SW)

SW CTL

TU1 TU2

13 12

IC701 (SW)

1 2

5 3

13 12

SW CTL

1011 9

1ST-SND-H

SCART-MUTE

SCART-H

EXT-L

FROM SERVO /SYSTEM CONTROL BLOCK

WF7

52 53

(VIDEO/AUDIO/CHROMA/DEFLECTION/IF)

IC301

TUNER1

LINE

AUDIO MUTE

+5V

Q854

ATT

IC401

(AUDIO SIGNAL PROCESS)

TUNER1

TUNER2

LINE

PB-ON 5 6

EQ AMP

SP/LP-ON

MAIN CBA

IC151 (AMP)

WF9

OUTPUT

AMP

MUTE

SP-MUTE (FROM PIN 44 OF IC201)

INV

ATT

CN804 SP SP-GND 1

ALC DET

ALC

CL801

LINE AMP

REC-ON

JK151 HEADPHONE JACK

SP151 SPEAKER

MUTE

TP007 A-OUT

WF8

AUDIO HEAD

AUDIO ERASE HEAD

ACE HEAD ASSEMBLY

FULL ERASE HEAD

FE HEAD

CL402 3 A-PB/REC 4 A-COM 6 AE-H 5 FE-H

CL403 1 FE-H 2 FE-H-GND

Q855

BIAS OSC

Q856

Q853(PB=ON)

Q851

Q852(PB=ON)

SWITCHING D-REC-OFF

1 2

+5V

AUTO BIAS

100

REC AMP

SERIAL

AUDIO HD-SW

DECODER

CONTROL

68 69

A-MUTE-H

SDA SCL

FROM/TO SERVO/SYSTEM CONTROL BLOCK

1-7-5 1-7-6 T6400BLA

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