Philips 21PV385 58, 21PV385 39, 21PV385 07, 21PV385 01 Service Manual

TV-VCR Combination

Service	21PV385/01/07/39/58
Service
Service

Service Manual

Contents	Survey of versions:		VN: 1A
Chapter	/01	PAL-BG, EURO
	/07	PAL I, UK/IRELAND
Sec. 1: Adjustment Procedure	/39	PAL/SECAM-BG+PAL/SECAM-L/L',FRANCE
Schematic Diagrams and CBA's	/58	PAL-BG/DK+SECAM-BG/DK,EAST-EURO

Exploded Views

Mechanical and Electrical Parts Lists

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 2004 Video Service Department Printed in the Netherlands c Copyright reserved Subject to modification GB 3103 785 22300

MAIN SECTION

TV-VCR COMBINATION

Sec. 1: Main Section

IAdjustment Procedures

ISchematic Diagrams and CBA’s

IExploded Views

IMechanical 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 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 instrument, including, but not limited to, the following items:

a.Be sure that no built-in protective devices are defective 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 operate 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 instrument 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	CURRENT
BEING	TESTER
TESTED
TEST ALL EXPOSED
METAL SURFACES
ALSO TEST WITH
PLUG REVERSED
USING AC
ADAPTER PLUG	EARTH
AS REQUIRED	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-

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T6550SFTY

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-re- lated 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-relat- ed 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 connected 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.

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T6550SFTY

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 producing 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 droplets, 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 connectors, first, disconnect the AC plug from AC supply socket.

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T6550SFTY

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)

Table 1 : Ratings for selected area

AC Line Voltage

Clearance Distance (d) (d’)

≥ 3mm(d) 220 to 240 V ≥

6 mm(d’)

Chassis or Secondary Conductor
Primary Circuit Terminals
d’	d

Fig. 1

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.).

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.

Table 2: Leakage current ratings for selected areas

Exposed Accessible Part

	Z	AC Voltmeter
		(High Impedance)

BOne side of

Power Cord Plug Prongs

Fig. 2

	AC Line Voltage	Load Z	Leakage Current (i)	One side of power cord plug
				prongs (B) to:
		2kΩ RES.	i≤0.7mA AC Peak	RF or
		Connected in
			i≤2mA DC	Antenna terminals
		parallel
	220 to 240 V
		50kΩ RES.	i≤0.7mA AC Peak
		Connected in		A/V Input, Output
			i≤2mA DC
		parallel

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

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T6550SFTY

STANDARD NOTES FOR SERVICING

Circuit Board Indications

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

Top View	Bottom View
Out	Input
	In

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

5

Pin 1

10

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

Pin 1

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 ]

How to Read the Values of the Rectangular Type Chip Components

Example:

(a) Resistor

473

= 473 = 47 [kΩ]

(Top View)

(b) Capacitor

= Not Shown

(Top View)

Caution:

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

Pb (Lead) Free Solder

Pb free mark will be found on PCBs used Pb free solder. (Refer to figure.) For PCBs with Pb free mark, be sure to use Pb free solder. For PCBs without Pb free mark, use standard solder.

Pb free mark

Replacement Procedures for Leadless (Chip) Components

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

1. Preparation for replacement

1.1. Pb free solder

a.Soldering Iron

Use a soldering iron for Pb free solder.

b.Solder

Be sure to use Pb free solder.

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.)

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SFTY_Z13P

1.2. Standard solder

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.

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

Soldering Iron

Tweezers

Solder

Soldering Iron

Presolder

How to Remove / Install Flat Pack IC

Caution:

1.The Flat Pack-IC shape may differ by models. Use an appropriate hot-air flat pack-IC desoldering machine, whose shape matches that of the Flat PackIC.

2.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)

3.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 PackIC 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)

1-2-2

SFTY_Z13P

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	Flat Pack-IC	Desoldering Braid
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		Soldering Iron
by glue, or when it is removed from the CBA, it
may be damaged if force is used.		Fig. S-1-3

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.

	Fig. S-1-1
	Hot-air
	Flat Pack-IC
	Desoldering
CBA	Machine
Masking	Flat Pack-IC
Tape
Tweezers
	Fig. S-1-2

Sharp

Pin

Fine Tip

Soldering Iron

Fig. S-1-4

Hot Air Blower

or

Iron Wire

Soldering Iron

To Solid

Mounting Point

Fig. S-1-5

Example :

Pin 1 of the Flat Pack-IC
is indicated by a " " mark.	Fig. S-1-6

1-2-3

SFTY_Z13P

Presolder

Flat Pack-IC

CBA

Fig. S-1-7

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.

<Incorrect>

CBA

<Correct>	Grounding Band
	1MΩ
	CBA
1MΩ
	Conductive Sheet or
	Copper Plate

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SFTY_Z13P

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

MENU (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.

0

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

1

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

2

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

Head switching point adjustment mode

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

Auto record mode: Perform recording

4(15 Sec.)-->Stop-->Rewind (Zero return) automatically.

Head switching point adjustment mode

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

Key	Adjustment Mode

6No need to use.

7No need to use.

H. Shift adjustment mode: See adjust-

ment instructions page 1-6-5.

9

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

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.

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	Q202
(END SENSOR)	(START SENSOR)

SW211

(REC-SAFETY SW)	MAIN CBA

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T6550PFS

OPERATING CONTROLS AND FUNCTIONS

The remote control

REC STANDBY/ON

1	2	3
4	5	6
7	8	9
SLEEP		SYSTEM
	0
STATUS/EXIT	PLAY	CLEAR
REW		FWD
	MENU
	STOP
		P
VOL	STILL	PROG
		P
MUTE

REC To record the TV channel selected at this moment or press repeatedly to start a One-Touch Recording.

STANDBY/ON To switch off or on, interrupt menu function.

0..9 Press to select channels at TVCR.

SLEEP To select the switch-off time in 30 minutes intervals.

SYSTEM Doesn’t work on these models. (21PV385/01,07)

To change Video (colour) system. (21PV385/39,58)

STATUS/EXIT To access or remove the TVCR’s on-screen status display. To exit on-

screen menus.

CLEAR To delete last entry. To clear a programmed recording (TIMER). To reset the elapsed time counter in the playback, recording or stop mode.

STILL To stop the tape and play back a picture step by step. (except for during fast forwarding and fast rewinding)

MENU To call up main menu of TVCR.

FWD - When tape playback is stopped, press to fast forward the tape at high speed. During playback, press to fast forward the tape while the picture stays on the screen. To store or confirm entry in the menu. Press to adjust the controls of TVCR menu.

REW- When tape playback is stopped, press to rewind the tape at high speed. During playback, press to rewind the tape while the picture stays on the screen.To return the cursor in the menu. Press to adjust the controls of TVCR menu.

PLAY - To play back a tape, select an item in the menu of TVCR.

STOP - To stop the tape, select an item in the menu of TVCR.

VOL+ VOL– To adjust the volume.

PROG P+ PROG P– To select the programme number. During playback, press to adjust the tracking.

MUTE To eliminate the TV’s sound. Press again to restore the volume.

Red button/ Green button/ Yellow button/ Blue button/ Doesn’t work on these models.

[21PV385]

: To switch Teletext on or off, or transparent mode.

: Enlarge font

: Select Teletext sub-page

: Recall hidden information

: Stop page changes

: Go back to start page.

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T6550IB

Front of your TVCR

VIDEO AUDIO

P

STANDBY/ON

Standby/on: To switch TVCR on or off, interrupt menu function.

Volume: In connection with the button + , – to adjust the volume.

P+ P- Programme number: To select the programme number. During playback, press to adjust the tracking. To remove vertical jitter in a Still picture.

Record: To record the programme currently selected.

Playback: To play a recorded cassette.

Pause/Stop, eject cassette: To stop the tape; If this key is depressed while in STOP, the cassette is then ejected from the machine.

When tape playback is stopped, press to fast forward the tape at hight speed.

When tape playback is stoped, press to rewind the tape at hight speed.

Sockets on the front:

White socket / AUDIO input socket: To connect a camcorder or video game machine (audio). Yellow socket / VIDEO input socket: To connect a camcorder or video game machine (video).

Small socket / socket for headphones: To connect headphones.

Back of your TVCR

EXT1/AV1

Aerial input socket: To connect the aerial cable

EXT1/AV Scart socket :To connect a satellite receiver, decoder, video recorder, etc

Power switch: To switch the TV-Video Combi off.

Caution: If you switch off using the power switch, TIMER-recordings are impossible!

The control lights at the front of machine

STANDBY Standby light: lights up when the TV-Video Combi has been switched on by means of the main switch.

RECORD Recording light: lights up during recording.

Fast blink: recording pause; timer recording not stand-by.

Slow blink: timer recording is stored in a timer block.

1-4-2

T6550IB

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			[3] Power Unit
Supply CBA

[4]Tray Chassis Unit

[6]Top Cover

[7]Bottom Plate

[8]Deck Unit

[9]Text CBA

[10] Main CBA

[11]CRT

2.Disassembly Method

				REMOVAL
	ID/			REMOVE/
				*UNHOOK/
	LOC.	PART	Fig.
				UNLOCK/RELEASE/		Note
	No.
			No.	UNPLUG/
				DESOLDER
	[1]	Rear	1,2,5	7(S-1), 2(S-2),		1
		Cabinet		*CN151
		Power Unit		Anode Cap, *CN501,
	[2]	and Tray	3,4,5	*CN551, *CN601,		2
		Chassis		CRT CBA, Power
		Unit		Knob
	[3]	Power Unit	3,5	*CN502,	*CN552,	3
				*CN602
		Tray
	[4]	Chassis	3	----------		-
		Unit
		H.V./Power
	[5]	Supply	3	6(S-3)		4
		CBA
	[6]	Top Cover	3	5(S-4), CL604		5
	[7]	Bottom	3	(S-5)		6
		Plate

				REMOVAL
	ID/			REMOVE/
				*UNHOOK/
	LOC.	PART	Fig.
				UNLOCK/RELEASE/	Note
	No.
			No.	UNPLUG/
				DESOLDER
				7(S-6), (S-7), (S-8),
	[8]	Deck Unit	3, 5	Desolder *(CN201,	7
				CL401, CL402,
				CL403)
	[9]	Text CBA	3, 5	(S-9), Text Holder,	8
				*CN751, *CN752
	[10]	Main CBA	3	4(S-10)	9
	[11]	CRT	4	4(S-11)	10
	↓	↓	↓	↓	↓
	(1)	(2)	(3)	(4)	(5)

(1): Order of steps in Procedure. When reassembling, follow the steps in reverse order.These numbers are also used as the identification (location) No. of parts in Figures.

(2): Parts to be removed or installed.

(3): Fig. No. showing Procedure of Part Location.

(4): Identification of part to be removed, unhooked, 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)

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

Reference Notes in the Table

1.Removal of the Rear Cabinet.

Remove seven screws (S-1) and two screws (S-2). Disconnect connector CN151 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, CRT CBA, and Power Knob. Then pull the Power Unit and Tray Chassis Unit out backward.

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.

1-5-1

T6550DC

5.Removal of the Top Cover.

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.

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 a screw (S-9) and Text Holder, 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-1

S-1

S-2

S-2

S-1

Fig. 1

S-1

S-1

S-2

S-1

S-1

S-1

[1] REAR CABINET

Fig. 2

1-5-2

T6550DC

		S-4
		[4] Tray
S-4		Chassis Unit
		S-4
	S-4	CL604
S-6	S-6	[6] Top Cover
		S-6			[2] Power Unit and
		[8] Deck Unit			Tray Chassis Unit
S-6		[9] Text CBA
		S-10
	S-10	S-9
S-10
		Text
		Holder
		S-10
		[10] Main CBA			S-3	S-3
		S-8	Power Knob
	S-7					S-3
				[5] H.V./Power		S-3
				Supply CBA
		[7] Bottom Plate
	S-5			[3] Power Unit
						Fig. 3
			1-5-3			T6550DC

S-11

Anode Cap

CRT CBA

S-11

S-11

[11] CRT	S-11

Fig. 4

1-5-4

T6550DC

ANODE	CRT CBA
	CN501B
CRT
	SCREEN	FOCUS
GND	CN502 CN501
H.V./POWER SUPPLY CBA
	CN552
	CL501A
		CN551
	CN601	CN602
	TO DEGAUSS
	COIL
MAIN CBA
	CL403
			TEXT CBA
		CL302A
	CL401		CN901	CN902
	CL402	CL301A
		CN751
			CN752
CN151	CN201	CL603A
TO SPEAKER	CAPSTAN
	MOTOR		CL604
CYLINDER		TO TOP COVER
ASSEMBLY
FE HEAD	ACE HEAD	DECK UNIT
	ASSEMBLY
				Fig. 5
	1-5-5			T6550DC

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 (9965 000 14514), 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 : 80dB V

10.Ext.input

FRONT VIDEO-IN JACK or REAR SCART JACK

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.

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
	21PV385/07	0176
	21PV385/01	0178
		0242
	21PV385/58	0179
	21PV385/39	0177

4.To reset the software, press [PAUSE] and [5] buttons on the remote control unit.

The option code is changed.

1-6-1

T6550EA

1. DC114V (+B) 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			Color
	(+B),	VR601	RF
	TP504		(or Ext.)	Bar
	(GND)

	Tape	M. EQ.	Spec.
	---	DC Voltmeter,	+114±0.5V DC
		Plastic Tip Driver
	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 +114±0.5V DC.

2. H Adjustment

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	P+/P-	Ext.	---
		buttons

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 1-6-10.)

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.

1-6-2

T6550EA

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

J349F3

P+/P-

RF

Color Bar

(B-OUT)

buttons

(or Ext.)

Tape

M. EQ.

Spec.

---

Oscilloscope,

200mVp-p Max.

Pattern Generator

Figure

minimum

Fig. 1

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 1-6-10.)

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.

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 1-6-10.)

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

				Fig. 2
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 eject-

ing tape.

l

		TVCR						TVCR
	OK						NG

Normal

Abnormal

Fig. 3

1-6-3

T6550EA

5. SECAM Black Level 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.

	Test	Adj. Point	Mode	Input
	point
		P+/P-		SECAM
	J361G4		Ext.	Gray
		buttons
				Scale

Tape	M. EQ.	Spec.
	Pattern Generator,
---	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 1-6-10.)

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
1H
Black REF. Level	1H
	5mV/Div (10:1 Prove)
1H	Fig. 4

6. V. Size Adjustment

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	P+/P-	RF	Monoscope
	buttons	(or Ext.)
Tape	M. EQ.	Spec.
---	Pattern Generator	90±5%

1.Enter the Service mode. (See page 1-6-10.)

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.

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	P+/P-	RF	Monoscope
	buttons	(or Ext.)
Tape	M. EQ.	Spec.
---	Pattern Generator	90±5%

1.Enter the Service mode. (See page 1-6-10.)

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

T6550EA

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	P+/P-	RF	Monoscope
	buttons	(or Ext.)
Tape	M. EQ.	Spec.
---	Pattern Generator	90±5%

1.Enter the Service mode. (See page 1-6-10.)

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.

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	Screen-Control,	RF	Black Ras-
		P+/P-buttons	(or Ext.)	ter
	Tape	M. EQ.	Spec.
	---	Pattern Generator	See Reference
			Notes below

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 1-6-10.) 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.

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.

1-6-5

T6550EA

10. White Balance 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-Control,	RF	White
	Screen			Raster
		P+/P-buttons	(or Ext.)
				(APL 100%)
	Tape	M. EQ.	Spec.
	---	Pattern Generator,	See below
		Color analyzer
		Figure

Color Ajalyzer

Fig. 5

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.

11. Sub-Brightness Adjustment

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	P+/P-	RF	SYMPTE
			buttons	(or Ext.)
		Tape	M. EQ.	Spec.
	---		Pattern	See below
			Generator
			Figure

White		Black
		This bar
	A B C	(A) just
		visible
		Fig. 6

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

1.Enter the service mode. (See page 1-6-10.)

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

T6550EA

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

General

1.Enter the Service mode. (See page 1-6-10)

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 "0."

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	RF	Monoscope
		(or Ext.)
Tape	M. EQ.	Spec.
---	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.

1-6-7

T6550EA

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 1-6-10.)

2.Playback the test tape (9965 000 14514).

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 (448 s) 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 (9965 000 14514) 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 (9965 000 14514) is indicated with green.

In case of adjusting incorrectly: "NG" (red) is indi-

cated with ejecting tape.

l

		TVCR						TVCR
	7.0H						NG

Correct

Incorrect

Fig. 7

1-6-8

T6550EA

Adjustment Points and Test Points

H.V./Power Supply CBA Top View

Focus-control (Upper side)

Screen-control (Lower side)

R590

(H Adjustment)

TP503

+B

	VR601	TP504
	+B ADJ
		GND

Main CBA Top View

		TP007
	TP002	N-A-PB	J361G4
	RF-SW		(SECAM
	TP001		Black Level
			Adjustment)
	CTL
	TP008
	C-PB	TP003	J349F3
			B-OUT
	IC202	V-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	Used in:	Page No.
TP001	Mechanical Alignment Procedures	2-3-3
TP002	Mechanical Alignment Procedures	2-3-3, 2-3-4
TP008	Mechanical Alignment Procedures	2-3-3, 2-3-4
TP503	Electrical Adjustment Instructions	1-6-1
TP504	Electrical Adjustment Instructions	1-6-1

1-6-9

T6550EA

(DECK ASSEMBLY)

AC HEAD ASSEMBLY

CONTROL

HEAD

1-7-1

CYLINDER ASSEMBLY

PG

SENSOR

DRUM M

MOTOR

LOADING

MOTOR

T6550BLS

NOTE FOR WIRE CONNECTORS:

TEST POINT INFORMATION

Comparison Chart of

1. PREFIX SYMBOL "CN" MEANS CONNECTOR.

Models & Marks

:INDICATES A TEST POINT WITH A JUMPER WIRE ACROSS A HOLE IN THE PCB.

(CAN DISCONNECT AND RECONNECT.)

"

" = SMD

2. PREFIX SYMBOL "CL" MEANS WIRE-SOLDER

:USED TO INDICATE A TEST POINT WITH A COMPONENT LEAD ON FOIL SIDE.

Model

Mark

HOLES OF THE PCB.

:USED TO INDICATE A TEST POINT WITH NO TEST PIN.

21PV385/07

A

(WIRE IS SOLDERED DIRECTLY.)

:USED TO INDICATE A TEST POINT WITH A TEST PIN.

21PV385/01

B

MAIN CBA

IC201

21PV385/58

C

21PV385/39

D

AL+5V

(SERVO/SYSTEM CONTROL)

SW201

SW205

D201

RS201

KEY-1

7

KEY SWITCH

S-LED

SW206

SW210

REMOTE

14 REMOTE

KEY-2

8

KEY SWITCH

SENSOR

WF3

TP001

P-ON-H

CL402

CTL

97 CTL AMP-OUT

P-ON-H 67

TO POWER

P-DOWN-L

CTL(+)

2

95 CTL(+)

P-DOWN-L 85

SUPPLY BLOCK

CTL(-)

1

94 CTL(-)

D202

REC

SW212

AL+5V

REC-LED 23

AL+5V

LD-SW

REC-LED

24

STANDBY

D204

9 LD-SW

									IC202 (MEMORY)
					10 ST-SENS.	SCL	71	6	SCL
					4 END-SENS.	SDA 72		5	SDA
					80 T-REEL	I2C-OPEN 45		7	CS
Q202		Q201	Q205						SCL
ST-SENS.		END-SENS.	T-REEL
									SDA	TO CHROMA
									I2C-OPEN	BLOCK
SENSOR CBA	SENSOR CBA			Q204
(ST-SENSOR)	(END-SENSOR)		TIMER+5V	RESET	34 RESET
									SCL
									SDA
						SP-MUTE 44			SP-MUTE
									A-MUTE-H	TO AUDIO
						A-MUTE-H	20
									EXT-L	BLOCK
CAPSTAN MOTOR						EXT-L	42
									SCART-H
						SCART-H	48
								SCART-MUTE
			CN201			SCART-MUTE	29
		CM+12V	1	CM+12V
		P-ON+5V(3)	2	P-ON+5V(3)		REC-SAFETY 31		SW211
		C-FG	3		87 C-FG
CAPSTAN	M							REC
		C-F/R	4		78 C-F/R
MOTOR								SAFETY
		C-CONT	5		76 C-CONT
		FG-GND	6
		LD-CONT	7		81 LD-CONT				SCL
		D-CONT	8		77 D-CONT
									SDA
		D-PFG	9		90 D-PFG
						D-REC-H	47		D-REC-H
		M-GND	10
									C-SYNC
						C-SYNC	74
		AL+12V(1)	11
				AL+12V(1)					DV-SYNC	TO VIDEO
						DV-SYNC	13
		VG	12		+33V
									V-ENV
										BLOCK
						V-ENV	6
M
									C-ROTA
						C-ROTA	15
									RF-SW
						RF-SW	18
						D
						TRICK-H	33		TRICK-H
									SECAM-H
						SECAM-H	32

DIAGRAMS BLOCK

Diagram Block Control Servo/System

	NOTE FOR WIRE CONNECTORS:	TEST POINT INFORMATION			Comparison Chart of
	1. PREFIX SYMBOL "CN" MEANS CONNECTOR.	:INDICATES A TEST POINT WITH A JUMPER WIRE ACROSS A HOLE IN THE PCB.			Models & Marks
	(CAN DISCONNECT AND RECONNECT.)	:USED TO INDICATE A TEST POINT WITH A COMPONENT LEAD ON FOIL SIDE.
" " = SMD	2. PREFIX SYMBOL "CL" MEANS WIRE-SOLDER	:USED TO INDICATE A TEST POINT WITH NO TEST PIN.			Model	Mark
	HOLES OF THE PCB.	:USED TO INDICATE A TEST POINT WITH A TEST PIN.
					21PV385/07	A
	(WIRE IS SOLDERED DIRECTLY.)	REC-VIDEO SIGNAL	PB-VIDEO SIGNAL	MODE: SP/REC
					21PV385/01	B

21PV385/58

C

MAIN CBA

TO

SDA

21PV385/39

D

SERVO/SYSTEM

SCL

CONTROL BLOCK

TO

C-VIDEO

CHROMA

TU001

BLOCK

VIDEO OUT

24

IC401

(VIDEO/AUDIO SIGNAL PROCESS)

65

43

46

68 69

78

79

SERIAL

(DECK ASSEMBLY)

Y. DELAY

JK701

DECORDER

CYLINDER ASSEMBLY

V-IN

CL401

LUMINANCE

R

P

96

V(R)

1

VIDEO (R)

SP

95

V-COM

2

HEAD

SIGNAL

HEAD

93

V(L)

3

PROCESS

AMP

VIDEO (L)

WF4

94

HEAD

JK703

Q705

TUNER

BYPASS

AGC

48

V-IN

SCART

20

BUFFER

52

2-7-1

LINE

V-OUT

19

54

56

CHARA.

SCART

LINE

INS.

CCD 1H DELAY

Y

WF1

PB/EE

+

REC FM

Q703

BUFFER

AGC

TP002

MUTE

1/2

C

RF-SW

TUNER

CHROMINANCE

PB/EE

SIGNAL

D-REC-H

80

D-REC-H

MUTE

PROCESS

RF-SW

R

P R

P

C-ROTA

RF-SW/C-ROTA

70

DV-SYNC

FBC

Y/C

DV-SYNC

62

WF5

MIX

TO SERVO/SYSTEM

TP003

TU-VIDEO

CONTROL BLOCK

V-OUT

R

P

V-ENV

84

V-ENV

TO CHROMA

Q401

C-SYNC

VIDEO

C-SYNC

67

D

BLOCK

BUFFER

61

AGC

VXO

TRICK-H

SECAM-H

63

PB-H OUT

IC471 (PAL/SECAM DECTECOTR)

58

59

28

29

21

44

WF2

28

TP010

1

X401

TP008

GND

29

4.43MHz

C-PB

PAL/SECAM

17

WF6

12

DETECTOR

2

16

T6550BLV

14

Diagram Block Video

NOTE FOR WIRE CONNECTORS:

		1. PREFIX SYMBOL "CN" MEANS CONNECTOR.	TEST POINT INFORMATION
			:INDICATES A TEST POINT WITH A JUMPER WIRE ACROSS A HOLE IN THE PCB.
		(CAN DISCONNECT AND RECONNECT.)
	" " = SMD	2. PREFIX SYMBOL "CL" MEANS WIRE-SOLDER	:USED TO INDICATE A TEST POINT WITH A COMPONENT LEAD ON FOIL SIDE.
		HOLES OF THE PCB.	:USED TO INDICATE A TEST POINT WITH NO TEST PIN.	PB-AUDIO SIGNAL	REC-AUDIO SIGNAL	Mode : SP/REC
			:USED TO INDICATE A TEST POINT WITH A TEST PIN.
		(WIRE IS SOLDERED DIRECTLY.)

IC301 (VIDEO/AUDIO/CHROMA/DEFLECTION/IF)

MAIN CBA

IC151 (AMP)

TU001

WF7

TUNER

AUDIO OUT 21

52

OUTPUT

JK151

LINE

ATT

50

7

1

HEADPHONE JACK

53

AMP

MUTE

54

AUDIO

5

MUTE

CN151

CL801

SP

1

SP151

SP-GND

2

SPEAKER

JK702

TO

A-IN

SP-MUTE

IC701 (SW)

SERVO/SYSTEM

CONTROL BLOCK

1

SCART

15

JK703

2

LINE

A-IN

2

5

SCART

4

IC401

3

LINE

A-OUT

1

(AUDIO SIGNAL PROCESS)

3-7-1

12

14

TUNER

13

SW CTL

17 LINE

ALC

12

INV

DET

11 10

9

PB-ON

WF9

R

LINE

5

EQ

ALC

MUTE

11

8

9

ATT

AMP

6

AMP

P

Q701

SP/LP-ON

TP007

N-A-PB

SCART-H

TO SERVO

+5V

7

WF8

EXT-L

/SYSTEM

SCART-MUTE

CONTROL

BLOCK

Q854

REC-ON

(DECK ASSEMBLY)

CL402

AUDIO

3

A-PB/REC

Q855

1

AUTO

3

100

REC

HEAD

4

A-COM

2

BIAS

AMP

BIAS

AUDIO

6

AE-H/FE-H

OSC

ERASE

5

FE-H

Q856

HEAD

ACE HEAD ASSEMBLY

Q853(PB=ON)

SERIAL

AUDIO HD-SW

DECODER

SWITCHING

CONTROL

16

68 69

71

CL403

Q851 D-REC-OFF

FULL

+5V

1

FE-H

ERASE

Q852(PB=ON)

2

FE-H-GND

HEAD

A-MUTE-H

T6550BLA

FE HEAD

TO

SDA

SERVO/SYSTEM

SCL

CONTROL BLOCK

Diagram Block Audio