Jvc HR-XVC21-U, HR-XVC20-U Service Manual

SERVICE MANUAL

DVD/CD PLAYER Hi-Fi STEREO VIDEO CASSETTE RECORDER

HR-XVC20US,

HR-XVC21UC

SPECIFICATIONS (The specifications shown pertain specifically to the model HR-XVC20US.)

GENERAL			DVD section
Power supply:	AC 120V 60Hz		Signal system:	NTSC
Power consumption:	Operation: 16W		Applicable disc:	DVD (12cm, 8cm), CD (12cm, 8cm)
	Stand by: 2W		Audio characteristics:	DVD: 4Hz - 22KHz
Weight:	7.9lbs (3.6 kg)		Frequency response:	CD: 4Hz - 20KHz
Dimensions:	Width : 16-15/16 inches (430 mm)		S/N Ratio:	90dB
	Height:	3-7/8 inches (99 mm)	Harmonic distortion:	0.02%
	Depth :	9-13/16 inches (249 mm)	Wow and flutter:	Below Measurable Level
Inputs/Outputs:			Dynamic range:	90dB
Video:	In: 1Vp-p/75 ohm		Output:	Video :	(RCA) 1 Vp-p/75ohm
	Out: 1Vp-p/75 ohm			Audio :	(RCA) -8 dBm/1Kohm
Audio:	In: -8 dBm/50K ohm			Digital Audio : 0.5Vp-p 75 ohm
	Out: -8 dBm/1K ohm		Pickup:	CD :	Wavelength: 775 - 805 nm
Antenna:	UHF/VHF IN/OUT: 75 ohm coaxial				Maximum output power: 0.5 mW
Hi-Fi Frequency Response: 20Hz to 20,000Hz				DVD : Wavelength: 640 - 660 nm
Hi-Fi Dynamic Range:	More than 90dB				Maximum output power: 1.0 mW
VCR section			ACCESSORIES:	Remote control x 1
Video Head:	4 Rotary Heads			Batteries (2 x AA)
Audio Track:	Hi-Fi Sound - 2 Tracks / MONO Sound - 1 Track			75 ohm Coaxial Cable x 1
Tuner:	181 Channel Freq. Synthesized			AUDIO/VIDEO Cable x 1
	VHF	2-13
	UHF	14-69
	CATV	14-36 (A)-(W)
		37-59 (AA)-(WW)
		60-85 (AAA)-(ZZZ)
		86-94 (86)-(94)
		95-99 (A-5)-(A-1)
		100-125 (100)-(125)
		01 (5A)
RF Channel Output:	Channel 3 or 4, Switchable
F.FWD/REW Time:	Approx. 1 minute 48 seconds (with T-120 Cassette Tape) (at+25°C)			HR-XVC20US, HR-XVC21UC D2VP11
		This service manual is printed on 100% recycled paper.			No.82948
		COPYRIGHT © 2002 VICTOR COMPANY OF JAPAN, LTD			2002/12

TABLE OF CONTENTS

Section	Title	Page
Important Safety Precautions
INSTRUCTIONS
DISASSEMBLY INSTRUCTIONS
1. REMOVAL OF MECHANICAL PARTS AND P.C.BOARDS ...............		1-1
1-1 TOP CABINET AND FRONT CABINET ............................		1-1
1-2 FLAP ..................................................................................		1-1
1-3 DECK CD ...........................................................................		1-1
1-4 VCR DECK ........................................................................		1-2
1-5 VCR/DVD PCB ..................................................................		1-2
2. REMOVAL OF VCR DECK PARTS .........................................		1-3
2-1 TOP BRACKET ..................................................................		1-3
2-2 CASSETTE HOLDER ASS’Y .............................................		1-3
2-3 CASSETTE SIDE L/R ........................................................		1-3
2-4 LINK UNIT .........................................................................		1-3
2-5 LINK LEVER / FLAP LEVER .............................................		1-3
2-6 LOADING MOTOR / WORM ..............................................		1-4
2-7 TENSION ASS’Y ................................................................		1-4
2-8 T BRAKE ARM / T BRAKE BAND ......................................		1-5
2-9 S REEL / T REEL / IDLER ARM ASS’Y / IDLER GEAR ..............		1-5
2-10 CASSETTE OPENER / PINCH ROLLER BLOCK / P5ARM ASS’Y .............		1-6
2-11 A/C HEAD ........................................................................		1-6
2-12 FE HEAD .........................................................................		1-6
2-13 CYLINDER UNIT ASS’Y ..................................................		1-6
2-14 CAPSTAN DD UNIT .........................................................		1-7
2-15 MAIN CAM / PINCH ROLLER CAM / JOINT GEAR ............		1-7
2-16 LOADING GEAR S/T UNIT ..............................................		1-7
2-17 CLUTCH ASS’Y / RING SPRING / CLUTCH LEVER / CLUTCH GEAR ...............		1-8
2-18 CASSETTE GUIDE POST / INCLINED BASE S/T UNIT / P4 CAP..............		1-8
3. REMOVAL AND INSTALLATION OF FLAT PACKAGE IC ...........		1-9
REMOVAL ................................................................................		1-9
INSTALLATION ......................................................................		1-10
KEY TO ABBREVIATIONS ......................................................		1-11
SERVICE MODE LIST ..............................................................		1-13
WHEN “N” IS ALWAYS BEING DISPLAYED ON THE TV MONITOR . 1-13
PARENTAL CONTROL - RATING LEVEL 4-DIGIT PASSWORD CANNCELLATION . 1-13
WHEN REPLACING EEPROM(MEMORY) IC .........................		1-14
PREVENTIVE CHECKS AND SERVICE INTERVALS .............		1-15
CONFIRMATION OF HOURS USED .......................................		1-15
CLEANING ...............................................................................		1-15
SERVICING FIXTURES AND TOOLS ......................................		1-16
MECHANISM ADJUSTMENT PARTS LOCATION GUIDE ............		1-16
MECHANICAL ADJUSTMENT ................................................		1-17
TAPE REMOVAL METHOD AT NO POWER SUPPLY ..........		1-17
DISC REMOVAL METHOD AT NO POWER SUPPLY ...........		1-17
1. CONFIRMATION AND ADJUSTMENT .................................		1-17
1-1 CONFIRMATION AND ADJUSTMENT OF TENSION POST POSITION . 1-17
1-2 CONFIRMATION OF PLAYBACK TORQUE AND
BACK TENSION TORQUE DURING PLAYBACK ...........		1-17
1-3 CONFIRMATION OF VSR TORQUE ...............................		1-17
1-4 CONFIRMATION OF REEL BRAKE TORQUE ................		1-18
2. CONFIRMATION AND ADJUSTMENT OF TAPE
RUNNING MECHANISM ..................................................		1-18
2-1 GUIDE ROLLER ..............................................................		1-18

2-2 CONFIRMATION AND ADJUSTMENT OF AUDIO/CONTROL HEAD . 1-19 2-3 TAPE RUNNING ADJUSTMENT(X-VALUE ADJUSTMENT) . 1-19

ELECTRICAL ADJUSTMENTS ...............................................	1-20
1. BASIC ADJUSMENT ............................................................	1-20
1-1 SWITCHING POINT ........................................................	1-20
ELECTRICAL ADJUSTMENT PARTS LOCATION GUIDE ............	1-20
IC DESCRIPTIONS ..................................................................	1-21
SERVO TIMING CHART ..........................................................	1-24
MECHANISM TIMING CHART .................................................	1-25
TROUBLE SHOOTING GUIDE ................................................	1-26
(VCR SECTION) ....................................................................	1-26
(DVD SECTION) ....................................................................	1-49

Section	Title	Page
CHARTS AND DIAGRAMS
INTERCONNECTION DIAGRAM ............................................		2-1
Y/C/AUDIO/CCD/HEAD AMP SCHEMATIC DIAGRAM ..........		2-3
VCR SYSCON SCHEMTAIC DIAGRAM .................................		2-5
TUNER/JACK SCHEMATIC DIAGRAM ..................................		2-7
OPERATION/DISPLAY SCHEMATIC DIAGRAM ....................		2-9
HI-FI/DEMODULATOR SCHEMATIC DIAGRAM ..................		2-11
POWER SCHEMATIC DIAGRAM .........................................		2-13
MPEG/MICOM SCHEMATIC DIAGRAM ...............................		2-15
MEMORY SCHEMATIC DIAGRAM .......................................		2-17
DSP SCHEMATIC DIAGRAM	................................................	2-19
MOTOR DRV SCHEMATIC DIAGRAM .................................		2-21
READ CHANNEL SCHEMATIC ...........................DIAGRAM		2-23
AUDIO/VIDEO SCHEMATIC DIARAM ..................................		2-25
OPERATION SCHEMATIC DIAGRAM ..................................		2-27
PRINTED CIRCUIT BOARD OPERATION ............................		2-29
PRINTED CIRCUIT BOARD VCR/DVD .................................		2-31
WAVEFORMS .......................................................................		2-35
DVD BLOCK DIAGRAM ........................................................		2-37
Y/C/AUDIO/CCD/HEAD AMP .................BLOCK DIAGRAM		2-39
SYSTEM CONTROL BLOCK ...............................DIAGRAM		2-41
HI-FI/DEMODULATOR BLOCK ...........................DIAGRAM		2-43
TUNER/JACK BLOCK DIAGRAM .........................................		2-45
POWER BLOCK DIAGRAM ..................................................		2-47
PARTS LIST
3.1 PACKING AND ACCESSORY ................ASSEMBLY<M1>		3-1
3.2 FINAL ASSEMBLY<M2> ......................................................		3-2
3.3 MECHANISM ASSEMBLY<M4> ..........................................		3-4
3.4 ELECTRICAL PARTS LIST ..................................................		3-7
VCR/DVD BOARD ASSEMBLY<03> .......................................		3-7
OPERATION BOARD ASSEMBLY<28> .................................		3-15
REFERENCE
SEMICONDUCTOR BASE CONNECTIONS ..........................		4-1
GENERAL SPECIFICATIONS[HR ........................-XVC20US]		4-2

Important Safety Precautions

Prior to shipment from the factory, JVC products are strictly inspected to conform 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.

v Precautions during Servicing

1.Locations requiring special caution are denoted by labels and inscriptions on the cabinet, chassis and certain parts of the product. When performing service, be sure to read and comply with these and other cautionary notices appearing in the operation and service manuals.

2.Parts identified by the symbol and shaded () parts are critical for safety.

Replace only with specified part numbers.

Note: Parts in this category also include those specified to comply with X-ray emission standards for products using cathode ray tubes and those specified for compliance with various regulations regarding spurious radiation emission.

3.Fuse replacement caution notice.

Caution for continued protection against fire hazard. Replace only with same type and rated fuse(s) as specified.

4.Use specified internal wiring. Note especially:

1)Wires covered with PVC tubing

2)Double insulated wires

3)High voltage leads

5.Use specified insulating materials for hazardous live parts.

Note especially:
1)	Insulation Tape	3)	Spacers	5) Barrier
2)	PVC tubing	4)	Insulation sheets for transistors

6.When replacing AC primary side components (transformers, power cords, noise blocking capacitors, etc.) wrap ends of wires securely about the terminals before soldering.

Fig.1

7.Observe that wires do not contact heat producing parts (heatsinks, oxide metal film resistors, fusible resistors, etc.)

8.Check that replaced wires do not contact sharp edged or pointed parts.

9.When a power cord has been replaced, check that 10-15 kg of force in any direction will not loosen it.

Power cord

Fig.2

10.Also check areas surrounding repaired locations.

11.Products using cathode ray tubes (CRTs)

In regard to such products, the cathode ray tubes themselves, the high voltage circuits, and related circuits are specified for compliance with recognized codes pertaining to X-ray emission.

Consequently, when servicing these products, replace the cathode ray tubes and other parts with only the specified parts.

Under no circumstances attempt to modify these circuits. Unauthorized modification can increase the high voltage value and cause X-ray emission from the cathode ray tube.

12.Crimp type wire connector

In such cases as 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, if replacing the connectors is unavoidable, in order to prevent safety hazards, perform carefully and precisely according to the following steps.

1)Connector part number : E03830-001

2)Required tool : Connector crimping tool of the proper type which will not damage insulated parts.

3)Replacement procedure

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

Important : Do not reuse a connector (discard it).

cut close to connector

Fig.3

(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.

15 mm

Fig.4

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

Metal sleeve

Connector

Fig.5

(4)As shown in Fig.6, 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.

25	Crimping tool
1.
2.
0
5.
5

Fig.6

(5) Check the four points noted in Fig.7.

Not easily pulled free	Crimped at approx. center
		of metal sleeve
		Conductors extended
Wire insulation recessed
more than 4 mm
Fig.7

1

S40888-01

v 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.Insulation resistance test

Confirm the specified insulation resistance or greater between power cord plug prongs and externally exposed parts of the set (RF terminals, antenna terminals, video and audio input and output terminals, microphone jacks, earphone jacks, etc.). See table 1 below.

2.Dielectric strength test

Confirm specified dielectric strength or greater between power cord plug prongs and exposed accessible parts of the set (RF terminals, antenna terminals, video and audio input and output terminals, microphone jacks, earphone jacks, etc.). See table 1 below.

3.Clearance distance

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

Chassis

Fig. 8

d

d'

Power cord,

primary wire

4.Leakage current test

Confirm specified or lower leakage current between 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 earth ground/power cord plug prongs and externally exposed accessible parts. Use an AC voltmeter to measure across both terminals of load Z. See figure 9 and following table 2.

	a	b
Externally	Z	c
exposed	V
accessible part
	Fig. 9

5.Grounding (Class 1 model only)

Confirm specified or lower grounding impedance between earth pin in AC inlet and externally exposed accessible parts (Video in, Video out, Audio in, Audio out or Fixing screw etc.).

Measuring Method:

Connect milli ohm meter between earth pin in AC inlet and exposed accessible parts. See figure 10 and grounding specifications.

AC inlet	Grounding Specifications
	Exposed accessible part	Grounding Impedance (Z)
	Region
	USA & Canada	Z ≤ 0.1 ohm
Earth pin	Europe & Australia	Z ≤ 0.5 ohm

Milli ohm meter

Fig. 10

AC Line Voltage

Region

Insulation Resistance (R)

Dielectric Strength

Clearance Distance (d), (d')

100 V

Japan

R

≤

1 MΩ/500 V DC

AC 1 kV 1 minute

d, d'

≤

3 mm

100 to 240 V

AC 1.5 kV 1 miute

d, d'

≤

4 mm

110 to 130 V

USA & Canada

1 MΩ

≥

R

≥

12 MΩ/500 V DC

AC 1 kV 1 minute

d, d'

≤

3.2 mm

110 to 130 V

AC 3 kV 1 minute

d

≤

4 mm

Europe & Australia

R

≤ 10 MΩ/500 V DC

(Class 2)

d'

≤

8 mm (Power cord)

200 to 240 V

AC 1.5 kV 1 minute

d'

≤

6 mm (Primary wire)

(Class 1)

Table 1 Specifications for each region

AC Line Voltage

Region

Load Z

Leakage Current (i)

a, b, c

100 V

Japan

1 kΩ

i

≤

1 mA rms

Exposed accessible parts

110 to 130 V

USA & Canada

0.15 µF

1.5 kΩ

i

≤

0.5 mA rms

Exposed accessible parts

i

≤

0.7 mA peak

Antenna earth terminals

110 to 130 V

Europe & Australia

2 kΩ

i

≤

2 mA dc

220 to 240 V

i

≤

0.7 mA peak

Other terminals

50 kΩ

i ≤

2 mA dc

Table 2 Leakage current specifications for each region

Note: These tables are unofficial and for reference only. Be sure to confirm the precise values for your particular country and locality.

2	S40888-01

DISASSEMBLY INSTRUCTIONS

1.REMOVAL OF MECHANICAL PARTS AND P.C. BOARDS

1-1: TOP CABINET AND FRONT CABINET (Refer to Fig. 1-1)

1.Remove the 5 screws 1.

2.Remove the Top Cabinet in the direction of arrow (A).

3.Disconnect the following connector: (CP651).

4.Unlock the 8 supports 2.

5.Remove the Front Cabinet in the direction of arrow (B).

6.Remove the 2 screws 3.

7.Remove the Operation PCB in the direction of arrow (C).

				1
				Top Cabinet
				1
			1
				1
				(A)
				1
Front Cabinet
2	2	(B)
				3 3
		2	2
	2			CP651
	2		(C)
		2	2	Operation PCB
				Fig. 1-1
1-2: FLAP (Refer to Fig. 1-2)

1.Open Flap to 90˚ and flex in direction of arrow (A), at the same time slide in direction of arrow (B).

2.Then lift in direction of arrow (C).

1-3: DECK CD (Refer to Fig. 1-3)

1.Make the short circuit on the position as shown Fig. 1-3 using a soldering. If you remove the Deck CD with no soldering, the Laser may be damaged.

2.Unlock the support 1 and remove the Deck Top Holder in the direction of arrow (A).

3.Remove the 2 screws 2.

4.Remove the 2 screws 3.

5.Disconnect the following connectors: (CP2301, CP2302, CP2601).

6.Remove the Deck CD in the direction of arrow (B).

7.Remove the 3 screws 4.

8.Remove the Front Angle in the direction of arrow (C).

			Pick Up PCB
		3
	Deck CD		3
		2
	Deck Top Holder
	1		2
	(A)		Make the sort circuit
		(B)
			using a soldering.
4
	4
	(C)	CP2601
		CP2301
		CP2302
4	Front Angle
			Fig. 1-3
NOTE

When the installation of the Deck CD, remove all the soldering on the short circuit position after the connection of Pick Up PCB and VCR/DVD PCB connector.

(A)

(C)

(B)

Flap

Fig. 1-2

1-1

DISASSEMBLY INSTRUCTIONS

1-4: VCR DECK (Refer to Fig. 1-4)

1. Remove the 3 screws 2.

2. Disconnect the following connectors: (CP101, CP102, CP103 and CP3001).

3. Remove the AC Head Cover and VCR Deck in the direction of arrow.

1 1

1

AC Head Cover

VCR Deck

	CP103	CP101
		CP102

CP3001

Fig. 1-4

1-5: VCR/DVD PCB (Refer to Fig. 1-5)

1.Remove the screw 1.

2.Remove the 6 screws 2.

3.Remove the VCR/DVD PCB in the direction of arrow.

2

VCR/DVD PCB

1 2

222 2

Fig. 1-5

1-2

DISASSEMBLY INSTRUCTIONS

2. REMOVAL OF VCR DECK PARTS

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

1.Extend the 2 supports 1.

2.Slide the 2 supports 2 and remove the Top Bracket.

NOTE

1.After the installation of the Top Bracket, bend the support 1 so that the Top Bracket is fixed.

1	Top Bracket
		1

Top Bracket

2

2

Main Chassis

Main Chassis

Fig. 2-1

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

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

2.Push the Locker R to remove the Cassette Side R.

3.Remove the Cassette Side L.

	Cassette Side R
Main Chassis		Locker R

Link Unit		Main Chassis
Cassette Side L		Fig. 2-2

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

1.Remove the Locker Spring.

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

3.Unlock the support 2 and then remove the Locker R.

Locker Spring

1

1Cassette Holder

2

Locker R

1

1

Cassette Side R

Cassette Side L

NOTE

1.In case of the Locker R installation, check if the one position of Fig. 2-3-B are correctly locked.

2.When you install the Cassette Side R, be sure to move the Locker R after installing.

Locker R
	Check if this position
Cassette Side R	is locked.

Fig. 2-3-B

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

1.Set the Link Unit to the Eject position.

2.Unlock the support 1.

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

Main Chassis

Link Unit

(A)	(B)

Link Unit

Main Chassis

Fig. 2-4

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

1.Extend the support 1.

2.Remove the Link Lever.

3.Remove the Flap Lever.

Flap Lever

1

Link Lever

Fig. 2-5

Fig. 2-3-A

1-3

DISASSEMBLY INSTRUCTIONS

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

1.Remove the screw 1.

2.Remove the Loading Motor.

3.Remove the Worm.

Loading Motor

Worm

Main Chassis

• Screw Torque: 3 ± 0.5kgf•cm	1	Fig. 2-6-A

NOTE

1.In case of the Worm installation, check if the value of the Fig. 2-6-B is correct.

2.In case of the Loading Motor installation, hook the wire on the Cassette Opener as shown Fig. 2-6-C.

3.When installing the wires between Capstan DD Unit and Loading Motor, connect them correctly as shown Fig. 2-6-D.

19.2± 0.1mm

Safety surface for pressing

of the insert.

Fig. 2-6-B

							Loading Motor
							Cassette Opener
								Fig. 2-6-C
		Pink
Loading	Motor						Capstan	DD Unit
-								L2
+								L1
		White						Fig. 2-6-D

1-4

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

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

2.Remove the Tension Spring.

3.Unlock the 2 supports 1 and remove the Tension Band.

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

5.Unlock the support 3 and remove the Tension Connect.

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

Tension Arm Ass’y

Fig. 2-7-A

		1
Tension Connect	1	Tension Band
	3

Tension Spring

Tension Arm Ass’y

Tension Holder

2

4

Fig. 2-7-B

NOTE

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

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

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

Tension Band

Tension Connect

Fig. 2-7-C

DISASSEMBLY INSTRUCTIONS

[OK]	Tension Connect
	Tension Band
[NG]	Tension Connect

				Tension Band
				Fig. 2-7-D
Tension Connect
			Main Chassis	Fig. 2-7-E

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

1.Remove the T Brake Spring.

2.Turn the T Brake Arm clockwise and bend the hook section to remove it.

3.Unlock the 2 supports 1 and remove the T Brake Band.

T Brake Band

Hook section

T Brake Arm

1

1	T Brake Spring

Fig. 2-8-A

NOTE

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

[OK]		T Brake Arm
	T Brake Band
[NG]		T Brake Arm
	T Brake Band

Fig. 2-8-B

2-9: S REEL/T REEL/IDLER ARM ASS’Y/IDLER GEAR (Refer to Fig. 2-9-A)

1.Remove the S Reel and T Reel.

2.Remove the 2 Polyslider Washers 1.

3.Remove the Idler Arm Ass’y and Idler Gear.

NOTE

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

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

3.Take care not to damage the shaft.

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

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

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

(Refer to MECHANICAL ADJUSTMENT)

Idler Gear

			Idler Arm Ass’y
	S Reel	(B)
(A)			T Reel
	1
				(A)

1

Fig. 2-9-A

NOTE

1.In case of the S Reel and T Reel installation, check if the correct parts are installed. (Refer to Fig. 2-9-B)

2.In case of the Idler Arm Ass’y installation, install correctly as Fig. 2-9-C. And also set it so that the section “B” of Fig. 2-9-A is placed under the Main Chassis tab.

Big Hole	Small Hole	Fig. 2-9-B
(S Reel)	(T Reel)

[OK]

Clutch Gear

Idler Arm Ass’y

[NG]

Idler Arm Ass’y

Clutch Gear

Fig. 2-9-C

1-5

DISASSEMBLY INSTRUCTIONS

2-10: CASSETTE OPENER/PINCH ROLLER BLOCK/P5 ARM ASS’Y (Refer to Fig. 2-10-A)

1. Unlock the support 1 and remove the Cassette Opener. 2. Remove the Pinch Roller Block and P5 Arm Ass’y.

1						Cassette Opener
					Pinch Roller Block
					P5 Arm Ass’y
							Main Chassis

Fig. 2-10-A

NOTE

1.Do not touch the Pinch Roller. (Use gloves.)

2.In case of the Pinch Roller Block and the Pinch Roller Cam installation, install correctly as Fig. 2-10-B.

Pinch Roller Block	Can be seen the hole of
	the Pinch Roller Cam.
P5 Arm Ass’y
Can be seen the hole of the
Main Cam.	Fig. 2-10-B

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

1.Remove the screw 1.

2.Remove the A/C Head Base.

3.Remove the 3 screws 2.

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

NOTE

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

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

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

	(1)	(3)
2		2

2

(2)				A/C Head
1			A/C Head Spring
• Screw Torque: 5 ± 0.5kgf•cm (Screw 1)					A/C Head Base
					Fig. 2-11-A

Spring Position	Fig. 2-11-B

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

1.Remove the screw 1.

2.Remove the FE Head.

1

FE Head

• Screw Torque: 5 ± 0.5kgf•cm
• The FE Head is not installed on the Video Cassette Player.	Fig. 2-12

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

1.Disconnect the following connector: (CD2001)

2.Remove the 3 screws 1.

3.Remove the Cylinder Unit Ass’y.

NOTE

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

CD2001

Cylinder Unit Ass’y

(3)

(2) 1

(1)1

	• Screw Torque: 3 ± 0.5kgf•cm	1
		Fig. 2-13

1-6

DISASSEMBLY INSTRUCTIONS

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

1.Remove the Capstan Belt.

2.Remove the 3 screws 1.

3.Remove the Capstan DD Unit.

Capstan Belt

Capstan DD Unit

1

1 1

• Screw Torque: 4 ± 0.5kgf•cm	Fig. 2-14-A

NOTE

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

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

Applied position of silicon bond

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

Fig. 2-14-B

Silicon Bond

Main Chassis

Capstan DD Unit

Fig. 2-14-C

2-15: MAIN CAM/PINCH ROLLER CAM/JOINT GEAR (Refer to Fig. 2-15-A)

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

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

1

Main Cam

2

Pinch Roller Cam

Joint Gear

Fig. 2-15-A

NOTE

1.In case of the Pinch Roller Cam and Main Cam installation, install them as the circled section of Fig. 2-15-B so that the each markers are met. (Refer to Fig. 2-15-B)

And also can be seen the Main Chassis hole through the Main Cam maker hole.

Pinch Roller Cam

Marker

Main Cam

Fig. 2-15-B

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

1.Remove the E-Ring 1 and remove the Main Loading Gear.

2.Remove the Main Rod, Tension Lever, Loading Arm S Unit and Loading Arm T Unit.

1

Main Loading Gear

Main Rod

Loading Arm T Unit

Tension Lever

Loading Arm S Unit

Fig. 2-16-A

1-7

DISASSEMBLY INSTRUCTIONS

NOTE

1.When you install the Loading Arm S Unit, Loading Arm T Unit and Main Loading Gear, align each marker. (Refer to Fig. 2-16-B)

Marker

Main Loading Gear

Marker

Loading Arm T Unit

Loading Arm S Unit

Fig. 2-16-B

2-17: CLUTCH ASS’Y/RING SPRING/CLUTCH LEVER/ CLUTCH GEAR (Refer to Fig. 2-17-A)

1.Remove the Polyslider Washer 1.

2.Remove the Clutch Ass’y and Ring Spring.

3.Remove the Clutch Lever.

4.Remove the Coupling Gear, Coupling Spring and Clutch Gear.

1

Clutch Ass’y

Ring Spring

Coupling Gear

Clutch Lever

Coupling Spring

Clutch Gear

Fig. 2-17-A

NOTE

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

Clutch Ass’y

Coupling Gear

Fig. 2-17-B

1-8

2-18: CASSETTE GUIDE POST/INCLINED BASE S/T UNIT/P4 CAP (Refer to Fig. 2-18-A)

1.Remove the P4 Cap.

2.Unlock the support 1 and remove the Cassette Guide Post.

3.Remove the Inclined Base S/T Unit.

4.Remove the screw 2.

5.Remove the LED Reflector.

Cassette Guide Post

Inclined Base S	1
Unit	Inclined Base T
	Unit
	P4 Cap

LED Reflector

2

Fig. 2-18-A

NOTE

1.Do not touch the roller of Guide Roller.

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

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

“A” “B”

P4 Cap	Cassette Opener

Fig. 2-18-B

[OK]

Cassette Guide Post

[NG]

Cassette Guide Post

Fig. 2-18-C

DISASSEMBLY INSTRUCTIONS

3.REMOVAL AND INSTALLATION OF FLAT PACKAGE IC

REMOVAL

1.Put the Masking Tape (cotton tape) around the Flat Package IC to protect other parts from any damage.

(Refer to Fig. 3-1.) NOTE

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

IC

Masking Tape

(Cotton Tape)

Fig. 3-1

2.Heat the IC leads using a blower type IC desoldering machine. (Refer to Fig. 3-2.)

NOTE

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

Blower type IC desoldering machine

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

NOTE

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

Blower type IC desoldering machine

Tweezers

IC

Fig. 3-3

4.Peel off the Masking Tape.

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

NOTE

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

Braided Shield Wire

Soldering Iron

IC

Fig. 3-2	IC pattern

Fig. 3-4

1-9

DISASSEMBLY INSTRUCTIONS

INSTALLATION

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

(Refer to Fig. 3-5.)

Soldering Iron

Solder temporarily

Solder temporarily

Fig. 3-5

2.Supply the solder from the upper position of IC leads sliding to the lower position of the IC leads.

(Refer to Fig. 3-6.)

Soldering Iron

Solder

IC	Supply soldering
	from upper position
	to lower position

Fig. 3-6

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

NOTE

Do not absorb the solder to excess.

4.When bridge-soldering between terminals and/or the soldering amount are not enough, resolder using a Thintip Soldering Iron. (Refer to Fig. 3-8.)

IC

Thin-tip Soldering Iron

Fig. 3-8

5.Finally, confirm the soldering status on four sides of the IC using a magnifying glass.

Confirm that no abnormality is found on the soldering position and installation position of the parts around the IC. If some abnormality is found, correct by resoldering.

NOTE

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

Soldering Iron

IC

Braided Shield Wire

Fig. 3-7

1-10

KEY TO ABBREVIATIONS

A	A/C	:	Audio/Control		H.SW	:	Head Switch
	ACC	:	Automatic Color Control		Hz	:	Hertz
	AE	:	Audio Erase	I	IC	:	Integrated Circuit
	AFC	:	Automatic Frequency Control		IF	:	Intermediate Frequency
	AFT	:	Automatic Fine Tuning		IND	:	Indicator
	AFT DET	:	Automatic Fine Tuning Detect		INV	:	Inverter
	AGC	:	Automatic Gain Control	K	KIL	:	Killer
	AMP	:	Amplifier	L	L	:	Left
	ANT	:	Antenna		LED	:	Light Emitting Diode
	A.PB	:	Audio Playback		LIMIT AMP	:	Limiter Amplifier
	APC	:	Automatic Phase Control		LM, LDM	:	Loading Motor
	ASS’Y	:	Assembly		LP	:	Long Play
	AT	:	All Time		L.P.F	:	Low Pass Filter
	AUTO	:	Automatic		LUMI.	:	Luminance
	A/V	:	Audio/Video	M M		:	Motor
B BGP		:	Burst Gate Pulse		MAX	:	Maximum
	BOT	:	Beginning of Tape		MINI	:	Minimum
	BPF	:	Bandpass Filter		MIX	:	Mixer, mixing
	BRAKE SOL	:	Brake Solenoid		MM	:	Monostable Multivibrator
	BUFF	:	Buffer		MOD	:	Modulator, Modulation
	B/W	:	Black and White		MPX	:	Multiplexer, Multiplex
C C		:	Capacitance, Collector		MS SW	:	Mecha State Switch
	CASE	:	Cassette	N	NC	:	Non Connection
	CAP	:	Capstan		NR	:	Noise Reduction
	CARR	:	Carrier	O OSC		:	Oscillator
	CH	:	Channel		OPE	:	Operation
	CLK	:	Clock	P	PB	:	Playback
	CLOCK (SY-SE)	:	Clock (Syscon to Servo)		PB CTL	:	Playback Control
	COMB	:	Combination, Comb Filter		PB-C	:	Playback-Chrominance
	CONV	:	Converter		PB-Y	:	Playback-Luminance
	CPM	:	Capstan Motor		PCB	:	Printed Circuit Board
	CTL	:	Control		P. CON	:	Power Control
	CYL	:	Cylinder		PD	:	Phase Detector
	CYL-M	:	Cylinder-Motor		PG	:	Pulse Generator
	CYL SENS	:	Cylinder-Sensor		P-P	:	Peak-to Peak
D	DATA (SY-CE)	: Data (Syscon to Servo)		R	R	:	Right
	dB	:	Decibel		REC	:	Recording
	DC	:	Direct Current		REC-C	:	Recording-Chrominance
	DD Unit	: Direct Drive Motor Unit			REC-Y	:	Recording-Luminance
	DEMOD	:	Demodulator		REEL BRK	:	Reel Brake
	DET	:	Detector		REEL S	:	Reel Sensor
	DEV	:	Deviation		REF	:	Reference
E	E	:	Emitter		REG	:	Regulated, Regulator
	EF	:	Emitter Follower		REW	:	Rewind
	EMPH	:	Emphasis		REV, RVS	:	Reverse
	ENC	:	Encoder		RF	:	Radio Frequency
	ENV	:	Envelope		RMC	:	Remote Control
	EOT	:	End of Tape		RY	:	Relay
	EQ	:	Equalizer	S	S. CLK	:	Serial Clock
	EXT	:	External		S. COM	:	Sensor Common
F	F	:	Fuse		S. DATA	:	Serial Data
	FBC	:	Feed Back Clamp		SEG	:	Segment
	FE	:	Full Erase		SEL	:	Select, Selector
	FF	:	Fast Forward, Flipflop		SENS	:	Sensor
	FG	:	Frequency Generator		SER	:	Search Mode
	FL SW	:	Front Loading Switch		SI	:	Serial Input
	FM	:	Frequency Modulation		SIF	:	Sound Intermediate Frequency
	FSC	:	Frequency Sub Carrier		SO	:	Serial Output
	FWD	:	Forward		SOL	:	Solenoid
G GEN		:	Generator		SP	:	Standard Play
	GND	:	Ground		STB	:	Serial Strobe
H	H.P.F	:	High Pass Filter		SW	:	Switch
							1-11

			KEY TO ABBREVIATIONS
S	SYNC	:	Synchronization
	SYNC SEP	:	Sync Separator, Separation
T	TR	:	Transistor
	TRAC	:	Tracking
	TRICK PB	:	Trick Playback
	TP	:	Test Point
U UNREG		:	Unregulated
V	V	:	Volt
	VCO	:	Voltage Controlled Oscillator
	VIF	:	Video Intermediate Frequency
	VP	:	Vertical Pulse, Voltage Display
	V. PB	:	Video Playback
	VR	:	Variable Resistor
	V.REC	:	Video Recording
	VSF	:	Visual Search Fast Forward
	VSR	:	Visual Search Rewind
	VSS	:	Voltage Super Source
	V-SYNC	:	Vertical-Synchronization
	VT	:	Voltage Tuning
X	X’TAL	:	Crystal
Y	Y/C	:	Luminance/Chrominance

1-12

SERVICE MODE LIST

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

To enter to the SERVICE MODE function, press and hold both buttons simultaneously on the main unit or on the main unit and on the remote control for more than a standard time (second).

Set Key		Set Key	Standard Time	Operations
			(seconds)
				PLAY/REC total hours are displayed on the TV Monitor.
				Refer to the “PREVENTIVE CHECKS AND SERVICE INTERVALS”
CH UP		FF	2	(CONFIRMATION OF HOURS USED).
				Can be checked of the INITIAL DATA of MEMORY IC.
				Refer to the “WHEN REPLACING EEPROM (MEMORY) IC”.
CH UP		STOP	2	Adjust the SWITHCHING POINT automatically.
				Refer to the “ELECTRICAL ADJUSTMENT” (SWITHCHING POINT).
				Initialization of the factory on VCR.
CH UP		PLAY	2	NOTE: Do not use this for the normal servicing.
				If you set a factory initialization, the memories are reset such as
				the clock setting, the channel setting, and PLAY/REC total hours.
				VCR operation mode at no connection of DVD.
CH DOWN		POWER	2	Refer to the “PREPARATION FOR SERVICING”
				NOTE: Although the DVD is connected, the DVD mode cannot be selected.

Set Key		Remocon Key	Standard Time	Operations
			(seconds)
				Initialization of the factory on DVD.
REC		4	2	NOTE: The function will only work without the setting of DVD disc at DVD
				mode.
				Do not use this for the normal servicing.
				Releasing of PARENTAL LOCK.
STOP		7	3	Refer to the “PARENTAL CONTROL - RATING LEVEL”.
				NOTE: The function will only work without the setting of DVD disc at DVD
				mode.

<NOTE> WHEN "N" IS ALWAYS BEING DISPLAYED ON THE TV MONITOR.

(REMOTE CONTROLLER FORMAT)

This product is usable the remote controller which is used by DVD+VHS of the other brand.

If "N" is always being displayed on the TV monitor, can not control from provided remote controller since this product is other brand format.

•How to return a JVC format.

Turn off the power of the set and push the CHANNEL+ button and the REC button of the set simultaneously.

PARENTAL CONTROL - RATING LEVEL (4 DIGIT PASSWORD CANCELLATION)

If the stored 4 digit password in the Rating Level menu needs to be cancelled, please follow the steps below.

1.Turn Unit ON.

2.Press and hold the '7' key on the remote control unit.

3.Simultaneously press and hold the 'STOP' key on the front panel.

4.Hold both keys for more than 3 seconds.

5.The On Screen Display message 'PASSWORD CLEAR' will appear.

6.The 4 digit password has now been cleared.

1-13

WHEN REPLACING EEPROM (MEMORY) IC

If a service repair is undertaken where it has been required to change the MEMORY IC, the following steps should be taken to ensure correct data settings while making reference to TABLE 1.

NOTE: No need setting for after INI 2F.

INI	+0	+1	+2	+3	+4	+5	+6		+7		+8	+9	+A	+B	+C	+D	+E	+F		ADDRESS DATA
00	0E	30	BA	60	64	64	4A		86		0B	2B	86	32	8A	08	0A	0F		INIT 00			0E
10	AF	97	95	8A	A0	55	31		04		88	A5	9F	3A	00	10	BF	00		PLAY/REC			0003
20	3A	11	22	70	61	2A	3A		00		00	00	00	85	A2	B0	00	00
																				Fig. 1
								Table 1

1.Connect the set to TV Monitor.

2.Turn on the POWER.

3.Press both CH UP button on the set and the FF button on the set for more than 2 seconds. ADDRESS and DATA will appear on TV Monitor as Fig 1.

4.ADDRESS is now selected and should “blink”. Using the SET + or - button on the remote, step through the ADDRESS until required ADDRESS to be changed is reached.

5.Press ENTER to select DATA. When DATA is selected, it will “blink”.

6.Again, step through the DATA using SET + or - button until required DATA value has been selected.

7.Pressing ENTER will take you back to ADDRESS for further selection if necessary.

8.Repeat steps 4 to 7 until all data has been checked.

9.When satisfied correct DATA has been entered, turn POWER off (return to STANDBY MODE) to finish DATA input.

After the data input, set to the initializing of shipping.

10.Turn on the POWER.

11.Press both CH UP button on the set and the PLAY button on the set for more than 2 seconds.

12.After the finishing of the initializing of shipping, the unit will turn off automatically.

The unit will now have the correct DATA for the new MEMORY IC.

1-14

PREVENTIVE CHECKS AND SERVICE INTERVALS

The following standard table depends on environmental conditions and usage. Parts replacing time does not mean the life span for individual parts.

Also, long term storage or misuse may cause transformation and aging of rubber parts. The following list means standard hours, so the checking hours depends on the conditions.

	Time	500	1,000	1,500	2,000	2,500	Notes
	Parts Name	hours	hours	hours	hours	hours
	Audio Control Head						Clean those parts in
	Full Erase Head
							contact with the tape.
	(Recorder only)
	Capstan Belt						Clean the rubber, and parts
	Pinch Roller						which the rubber touches.
	Capstan DD Unit
	Loading Motor
	Tension Band
	T Brake Band
	Clutch Ass’y
	Idler Arm Ass’y
	Capstan Shaft
	Tape Running						Replace when rolling
	Guide Post						becomes abnormal.
	Cylinder Unit						Clean the Head

: Clean

: Check it and if necessary, replace it.

CONFIRMATION OF HOURS USED

PLAY/REC total hours can be checked on the FIP.

Total hours are displayed in 16 system of notation.

NOTE: If you set a factory initialization, the total hours is reset to “0”.

1.Connect the set to TV Monitor.

2.Turn on the POWER.

3.Press both CH UP button on the set and the FF button on the set for more than 2 seconds.

4.After the confirmation of using hours, turn off the power.

CLEANING

NOTE

After cleaning the heads with isopropyl alcohol, do not run a tape until the heads dry completely. If the heads are not completely dry and alcohol gets on the tape, damage may occur.

1. AUDIO CONTROL HEAD

Clean the Audio Control Head with the cotton stick soaked by alcohol. Clean the full erase head in the same manner. (Refer to the figure below.)

INIT 00 0E Initial setting content of MEMORY IC. PLAY/REC 0003 PLAY/REC total hours.

= (16 x 16 x 16 x thousands digit value)

+(16 x 16 x hundreds digit value)

+(16 x tens digit value)

+(ones digit value)

2.TAPE RUNNING SYSTEM

When cleaning the tape transport system, use the gauze moistened with isopropyl alcohol.

3. CYLINDER

Wrap a piece of chamois around your finger. Dip it in isopropyl alcohol. Hold it to the cylinder head softly.

Turn the cylinder head counterclockwise to clean it (in the direction of the arrow). (Refer to the figure below.)

NOTE

Do not exert force against the cylinder head. Do not move the chamois upward or downward on the head.

Use the chamois one by one.

Cylinder Head

Audio Control Head

1-15

SERVICING FIXTURES AND TOOLS

(4 heads model)	Torque Gauge	Roller Driver	X-JG153 X Value Adjustment
VHS Alignment Tape	PUJ48075-2	PTU94002-2	Screwdriver
MHP

Torque Tape		Short Jumper

MECHANISM ADJUSTMENT PARTS LOCATION GUIDE

4

5

3

2

1

10

9

8

1.Tension Connect

2.Tension Arm

3.Guide Roller

4.Audio/Control Head

5.X value adjustment driver hole

6.P4 Post

7.T Brake Spring

8.T Reel

9.S Reel

10.Adjusting section for the Tension Arm position

1-16

6

7

MECHANICAL ADJUSTMENTS

TAPE REMOVAL METHOD AT NO POWER SUPPLY

1.Remove the Top Cabinet, Front Cabinet and DVD Block.

(Refer to item 1 of the DISASSEMBLY INSTRUCTIONS.)

2.Remove the screw 1 of the Deck Chassis and remove the Loading Motor. (Refer to Fig. 2)

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

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

5.Repeat the above step 3~4. Then take out the Video Cassette from the Deck Chassis.

Be careful not to scratch on the tape.

Loading Motor

Screw 1

Capstan DD Unit

Pinch Roller Cam

Main Cam

Clutch Ass'y

Main Chassis (Front Side)

DISC REMOVAL METHOD AT NO POWER SUPPLY

1.Remove the Top Cabinet and Front Cabinet. (Refer to item

1 of the DISASSEMBLY INSTRUCTIONS.)

2.Rotate the gear of Deck CD section in the direction of the arrow by hand, remove the disc from Deck CD.

Gear

Deck CD

1. CONFIRMATION AND ADJUSTMENT

Read the following NOTES before starting work.

•Place an object which weighs between 450g~500g on the Cassette Tape to keep it steady when you want to make the tape run without the Cassette Holder. (Do not place an object which weighs over 500g.)

1-1: CONFIRMATION AND ADJUSTMENT OF TENSION POST POSITION

1.Set to the PLAY mode.

2.Adjust the adjusting section for the Tension Arm position so that the Tension Arm top is within the standard line of Main Chassis.

3.While turning the S Reel clockwise, confirm that the edge of the Tension Arm is located in the position described above.

Standard line of Main Chassis

Tension Arm

0.5mm (Adjusting range)

Fig. 1-1-A

Adjusting section for the

Tension Arm position

Tension Band

The Tension Arm top will	The Tension Arm top will
move to the inside direction	move to the outside direction
of the Main Chassis.	of the Main Chassis.
	Bend
	Fig. 1-1-B

1-2: CONFIRMATION OF PLAYBACK TORQUE AND BACK TENSION TORQUE DURING PLAYBACK

1.After confirmation and adjustment of Tension Post position (Refer to item 1-1), load the cassette type torque tape and set to the PLAY mode.

2.Confirm that the right meter of the torque tape indicates 50~90gf•cm during playback in SP mode.

3.Confirm that the left meter of the torque tape indicates 25~40gf•cm during playback in SP mode.

1-3: CONFIRMATION OF VSR TORQUE

1.Install the Torque Gauge on the S Reel. Set to the Picture Search (Rewind) mode. (Refer to Fig.1-2-B)

2.Then, confirm that it indicates 120~180gf•cm.

NOTE

Install the Torque Gauge on the reel disk firmly. Press the REW button to turn the reel disk.

1-17

MECHANICAL ADJUSTMENTS

1-4: CONFIRMATION OF REEL BRAKE TORQUE

(S Reel Brake) (Refer to Fig. 1-2-B)

1.Once set to the Fast Forward mode then set to the Stop mode. While, unplug the AC cord when the Pinch Roller Block is on the position of Fig. 1-2-A.

2.Move the Idler Ass’y from the S Reel.

3.Install the Torque Gauge on the S Reel. Turn the Torque Gauge clockwise.

4.Then, confirm that it indicates 60~100gf•cm.

(T Reel Brake) (Refer to Fig. 1-2-B)

1.Once set to the Fast Forward mode then set to the Stop mode. While, unplug the AC cord when the Pinch Roller Block is on the position of Fig. 1-2-A.

2.Move the Idler Ass’y from the T Reel.

3.Install the Torque Gauge on the T reel. Turn the Torque Gauge counterclockwise.

4.Then, confirm that it indicates 30~50gf•cm.

The position at FF mode.

Pinch Roller Block

Stop at this position.

Cassette Opener

The position at STOP mode.

Capstan DD Unit

Cassette Holder Ass’y

Fig. 1-2-A

Torque Gauge

Torque Gauge

S Reel

T Reel

Fig. 1-2-B

NOTE

If the torque is out of the range, replace the following parts.

Check item	Replacement Part
1-3	Idler Ass’y/Clutch Ass’y
1-4	S Reel side: S Reel/Tension Band/Tension
	Connect/Tension Arm Ass’y
	T Reel side: T Reel/T Brake Band//T Brake
	Spring/T Brake Arm

2.CONFIRMATION AND ADJUSTMENT OF TAPE RUNNING MECHANISM

Tape Running Mechanism is adjusted precisely at the factory. Adjustment is not necessary as usual. When you replace the parts of the tape running mechanism because of long term usage or failure, the confirmation and adjustment are necessary.

2-1: GUIDE ROLLER

1.Playback the VHS Alignment Tape (MHP).

2.Connect CH-1 of the oscilloscope to TP101 (Envelope) and CH-2 to TP3002 (SW Pulse).

3.Press and hold the Tracking-Auto button on the remote control more than 2 seconds to set tracking to center.

4.Trigger with SW Pulse and observe the envelope. (Refer to Fig. 2-1-A)

5.When observing the envelope, adjust the Roller Driver (PTU94002-2) slightly until the envelope will be flat. Even if you press the Tracking Button, adjust so that flatness is not moved so much. (Refer to Fig. 2-1-B)

6.Adjust so that the A : B ratio is better than 3 : 2 as shown in Fig. 2-1-C, even if you press the Tracking Button to move the envelope (The envelope waveform will begin to decrease when you press the Tracking Button).

7.Adjust the PG shifter during playback.

(Refer to the ELECTRICAL ADJUSTMENTS)

NOTE

After adjustment, confirm and adjust A/C head.

(Refer to item 2-2)

CH-1 Envelope (TP101)

CH-1 CH-2

Track Track

CH-2

SW Pulse (TP3002)

Fig. 2-1-A

Improper

Proper

(a) Guide roller

	(b) P4 Cap				Fig. 2-1-B
	Entrance				Exit
Max
		A		B	Max

A : B ≥ 3 : 2

Fig. 2-1-C

1-18

MECHANICAL ADJUSTMENTS

2-2: CONFIRMATION AND ADJUSTMENT OF AUDIO/ CONTROL HEAD

When the Tape Running Mechanism does not work well, adjust the following items.

1.Playback the VHS Alignment Tape (MHP).

2.Confirm that the reflected picture of stamp mark is appeared on the tape prior to P4 Post as shown in Fig. 2- 2-A.

a)When the reflected picture is distorted, turn the screw 1 clockwise until the distortion is disappeared.

b)When the reflected picture is not distorted, turn the screw 1 counterclockwise until little distortion is appeared, then adjust the a).

3.Turn the screw 2 to set the audio level to maximum.

4.Confirm that the bottom of the Audio/ Control Head and the bottom of the tape is shown in Fig. 2-2-C.

c)When the height is not correct, turn the screw 3 to adjust the height. Then, adjust the 1~3 again.

Audio/Control Head

Reflected picture of

Stamp Mark

P4 Cap

Stamp Mark	Fig. 2-2-A

Audio/Control Head

31

2

4

Fig. 2-2-B

2-3: TAPE RUNNING ADJUSTMENT

(X VALUE ADJUSTMENT)

1.Confirm and adjust the position of the Tension Post.

(Refer to item 1-1)

2.Adjust the Guide Roller. (Refer to item 2-1)

3.Confirm and adjust the Audio/Control Head.

(Refer to item 2-2)

4.Connect CH-1 of the oscilloscope to TP3002, CH-2 to

TP101 and CH-3 to Audio Out.

5.Playback the VHS Alignment Tape (MHP).

6.Press and hold the Tracking-Auto button on the remote control more than 2 seconds to set tracking to center.

7.Set the X Value adjustment driver (X-JG153) to the 4 of Fig. 2-2-B. At first, turn the Audio/Control Head position fully toward the capstan side. Then adjust X Value to turn it back gradually toward the cylinder side and stop on the second peak point position of the envelope.

output			Play MHP
Waveform
				X-value adjustment point
Drum side			Control head position		Capstan side

Maximum

Fig. 2-3

8.Perform tracking operation and confirm the envelope is maximum on the tracking center position.

9.Playback the VHS Alignment Tape (MHP-L).

10.Perform tracking operation and confirm the envelope is maximum on the tracking center position. If envelope is

not maximum, should be fine-tune the X-VALUE.

Audio/Control Head

Tape

0.25±0.05mm

Fig. 2-2-C

1-19

ELECTRICAL ADJUSTMENTS

Read and perform this adjustment when repairing the circuits or replacing electrical parts or PCB assemblies.

1. BASIC ADJUSTMENT

CAUTION

When you exchange IC and Transistor for a heat sink, apply the silicon grease (YG6260M) on the contact section of the heat sink. Before applying new silicon grease, remove all the old silicon grease. (Old grease may cause damages to the IC and Transistor.)

1-1: SWITCHING POINT

CONDITIONS

MODE-PLAYBACK

Input Signal-Alignment Tape (MHP)

INSTRUCTIONS

1.Connect CH-1 on the oscilloscope to TP3002 and CH-2 to TP8001.

2.Playback the alignment tape. (MHP)

3.Press and hold the Tracking-Auto button on the remote control more than 2 seconds to set tracking to center.

4.Press both CH UP button on the set and the STOP button on the set for more than 2 seconds.

CH-2

6.5H

CH-1

Fig. 1-1-A

CH-2

CH-1

6.5H

Fig. 1-1-B

ELECTRICAL ADJUSTMENT PARTS LOCATION GUIDE (Connector Connections)

TU301

J8001

J8007

OS8001

J8006

SW7001

J8008

TP8001

CP102

CD501

AC IN

			CD102
	FE HEAD
CP103			AC HEAD
TP3001
TP101
TP3002
J8003	J8004	J8005	OS651

V651

VCR/DVD PCB

CP681

OPERATION PCB

TP101 : Envelope

TP3001 : Service Mode

TP3002 : Switching Pulse

TP8001 : Switching Point

CP2601

CP2301

CP2302

CP651

CD2601

CD681

CD2302

CD2301

DECK CD

1-20

IC DESCRIPTIONS

VCR/DVD PCB OEC0132A (IC3001)

No.	PORT	PIN NAME	I/O	DESCRIPRION
1	SVSS	SVSS	-	Ground.
2	CTL_REF	CTL_REF		Output terminal for CTL amp REF (1/2 SVCC)
3	CTL-H(+)	CTL-H(+)		Input and output terminal of Control Head.
4	CTL-H(-)	CTL-H(-)		Input terminal of Control Head.
5	CTL_BIAS	CTL_BIAS		Output terminal for bias.
6	CTL_FB	CTL_FB		Input terminal for CTL feedback
7	CTL_AMP(O)	CTL_AMP(O)		Output terminal for amp out.
8	CTL_AMP(I)	CTL_AMP(I)		Input terminal for CTL shumit amp .
9	CFG	CFG		Input terminal for CAPSTAN FG signal detection.
10	SVCC	SVCC		+ 5V (Servo)
11	AFC_PC	AFC_PC		AFC oscilator (external circuit).
12	AFC_OSC	AFC_OSC		AFC oscilator (external circuit).
13	AFC_LPF	AFC_LPF		LPF connection for AFC OSC.
14	CSYN/HSYN	CSYNC	OUT	Output terminal for composite SYNC.
15	VLPF/VSYN	VSYNC	IN	Input terminal for composite SYNC.(from 14pin)
16	CV_IN2	CV_IN2	IN	Composite Video input terminal.(for data slicer)
17	CV_IN1	CV_IN1	IN	Composite Video input terminal.(for OSD)
18	OSD VCC	OSDVCC	-	+ 5V
19	CV_OUT	CV_OUT	OUT	Composite Video output.(with OSD)
20	OSD_VSS	OSD_VSS	-	Ground.
21	4/2 FSC_OUT	4/2 FSC_OUT	OUT	4 FSC pulse.
22	4/2 FSC_IN	4/2 FSC_IN	IN	4 FSC pulse.
23	AVSS	AVSS	-	Ground.
24	AN-B	VIDEO_ENV	IN	Input terminal of video RF envelope.
25	AN-A	BOT-H	IN	Tape start sensor input signal.
26	AN-9	EOT-H	IN	Tape end sensor input signal.
27	AN8	MS_SEN-B	IN	Input terminal of mecha state sensor.
28	P07/AN7	MS_SEN-A	IN
29	P06/AN6	KEY-B	IN	Main unit key input.
30	P05/AN5	KEY-A	IN
31	P04/AN4	STEREO_SEL	IN	Input terminal for the judgement of voice reception condition.
32	P03/AN3	HI-FI_ENV	IN	Input terminal of HiFi RF envelope.
33	P02/AN2	AFT-S_CURVE	IN	AFT S CURVE input for tuner.
34	P01/AN1	SERVICE	IN	Input terminal for Service Mode.
35	P00/AN0	TAB SW	IN	Input terminal for judge the tape if it has TAB or not.
36	AVCC	AVCC	-	ON/OFF control Micon AD section.
37	P10/IRQ0	POWER_FAIL	IN	Input terminal of Power fail signal.
38	P11/IRQ1	VIDEO MUTE H	OUT	H for at AUTO_CLOCK in POWER OFF.
39	P12/IRQ2	POWER ON L	OUT	For control the user power switch ON/OFF.

1-21

IC DESCRIPTIONS

VCR/DVD PCB OEC0132A (IC3001)

40	P13/IRQ3	REEL-S	IN	Input terminal of reel sensor supply.
41	P14/IRQ4	REEL-T	IN	Input terminal of reel sensor take up.
42	P15/IRQ5	POWER ON-H	OUT	For control the user power switch ON/OFF.
43	P16/IC	REM_IN	IN	Receive the remote control signal.
44	P17/TMOW	DVD RESET	OUT	For control the DVD RESET.
45	P67/RP7/TMB	DVD POWER CTL	OUT	Output terminal for DVD power CTL.(3.3V/9V)
46	P66/RP6/ADTRG	DVD LED	OUT	The DVD LED light-up/put-off control output.
47	P65/RP5	VCR LED	OUT	The VCR LED light-up/put-off control output.
48	P64/RP4	1G/T-REC LED	OUT	LEM(LED Module) control terminal.
49	P63/RP3	2G/REC LED	OUT	LEM(LED Module) control terminal.
50	P62/RP2	3G/TV/VCR LED	OUT	LEM(LED Module) control terminal.
51	P61/RP1	4G	OUT	LEM(LED Module) control terminal.
52	P60/RP0	5G	OUT	LEM(LED Module) control terminal.
53	P37/TM0	Y/C CLOCK	OUT	Control terminal for Y/C. (CLOCK).
54	P36/BUZZ	Y/C DATA	OUT	Control terminal for Y/C.(DATA).
55	P35	SEG1	OUT	LEM(LED Module) control terminal.
56	VCC	VCC	-	Power of CPU.
57	VSS	VSS	-	Ground.
58	P27	SEG2	OUT	LEM(LED Module) control terminal.
59	P26	SEG3	OUT	LEM(LED Module) control terminal.
60	P25	SEG4	OUT	LEM(LED Module) control terminal.
61	P24/SCL1	IIC CLK	OUT	CLOCK terminal for IIC BUS communication.
62	P23/SDA1	IIC DATA	OUT	DATA terminal for IIC BUS communication.
63	P22/SCK1	SEG5	OUT	LEM(LED Module) control terminal.
64	P21/SO1	SO1/TX	OUT	Input terminal for DVD communication.(asynchronous)
65	P20/SI1	SI1/RX	IN	Output terminal for DVD communication.(asynchronous)
66	P47/RPTRG	SEG6	OUT	LEM(LED Module) control terminal.
67	P46/FTOB	SEG7	OUT	LEM(LED Module) control terminal.
68	P45/FTOA	SEG8	OUT	LEM(LED Module) control terminal.
69	P44/FTID	NC	OUT	Not used.
70	P43/FTIC	NC	OUT	Not used.
71	P42/FTIB	SEG9	OUT	LEM(LED Module) control terminal.
72	P41/FTIA	NC	OUT	Not used.
73	P40/PWM14	SEG10	OUT	LEM(LED Module) control terminal.
74	FEW	FEW	IN	FZTAT Write protect.
75	X2	X2	OUT	Subclock pulse(32.768KHz)
76	X1	X1	IN
77	/RESET	/RESET	IN	RESET will be done when the voltage goes to HIGH after the
				reset signal.
78	OSC1	OSC1	IN	Connect the main crystal(10MHz)

1-22

IC DESCRIPTIONS

VCR/DVD PCB OEC0132A (IC3001)

79	VSS	VSS	-	Ground.
80	OSC2	OSC2	OUT	Connect the main crystal(10MHz)
81	VCL	VCL	IN	Connect the capacitor
82	MD0	MD0	IN	FZTAT Write MODE.
83	P34/PWM2	NC	OUT	not used.
84	P33/PWM1	CAP_LIMIT	OUT	Switch the maximum output current of the Capstan Motor.
85	P32/PWM0	TUNER AUDIO MUTE-H	OUT	Output low at tuner and output high at external input/play.
86	P31/SV2	VCR-H	OUT	H for at PLAY in VCR MODE. L for except above case.
87	P30/SV1	POWER_MUTE	OUT	audio mute at POWER ON/OFF.
88	P70/PPG0	SYS_MUTE	OUT	audio mute for DVD at POWER ON/OFF.
89	P71/PPG1	NC	OUT	Not used.
90	P72/PPG2	NC	OUT	Not used.
91	P73/PPG3	AV SW_2	OUT	Control rear/front video signal.(at AV X 2)
92	P74/PPG4/RP8	AV SW_1	OUT	Control DVD/VCR video/audio signal.
93	P75/PPG5/RP9	Y/C CS	OUT	Control terminal for Y/C. (CHIP SELECT).
94	P76/PPG6/RPA	RF CH SW	OUT	3/4 ch Selection for the RF CH.
95	P77/RPG7/RPB	AUDIO_MUTE-H	OUT	L for at AUDIO MUTE and POWER OFF. H for except above case.
96	P80/YCO	V_REC_ST-H	OUT	On control of A/V recording(Whole width erase) circuit.
97	P81/EXCAP/YBO	LDM CTL	OUT	Loading motor control terminal.
98	P82/EXCTL	CAP_FWD-H	OUT	Capstan forward and backward command.
99	P83/C,ROT/R	C.ROTARY	OUT	Color Rotary Control output.
100	P84/H.AMP/SW/G	H.AMP.SW	OUT	Switching output of Head Amp SW.
101	P85/COMP/B	COMP	IN	Comparison results input of Playback Envelope level on SP/LP
				heads (4 heads).
102	P85/EZTTRG	CAP_FULL	OUT	Output the HIGH during the acceleration force of capstan motor at
				SLOW mode.
103	P87/DPG	CYL_SPEED_UP	OUT	Output terminal for correct cylinder during SLOW.
104	DFG	D FG/PG	IN	Input terminal for DRUM FG signal detection.
105	VIDEO_FF	VIDEO_H.SW	OUT	Output terminal of Video Head SW.
106	AUDIO_FF	HI-FI H.SW	OUT	Output terminal of HI-FI Head SW.
107	DRUM_PWM	DRUM_PWM	OUT	PWM output of Cylinder control.
108	CAP_PWM	CAP_PWM	OUT	PWM output of Capastan control.
109	V-PULSE	DUMMY_V-SYNC	OUT	Virtual V Pulse output.
110	SV VSS	SV VSS	-	Ground.
111	C.SYNC_IN	SYNC	IN	Input terminal for composite SYNC.
112	VCC	VCC(SV)	-	+ 5V

1-23

SERVO TIMING CHART

VCR/DVD PCB IC3001 (OEC0132A)

DPG 104 PIN

DFG 104 PIN

24 Cycle

H. SW. P 105 PIN

CH 1

CH 2

V-SYNC (E-E) 111 PIN

REC CTL (REC) 7 PIN

V-SYNC (TRICK PB) 109 PIN

• WAVEFORM CHANGES DEPENDED ON THE TAPE SPEED

1-24

MECHANISM TIMING CHART

Please see the list below for the operational timing and the mode sensor output of the main parts on each mechanism modes.

MECHANISM MODE			EJECT	STBY	UNLOAD	STOP3	VSR	F.SLOW	PB	STOP2	FF/REW
Mode Dealing
Directions
Revolutional Angle of		0	3	15	100	206.3	226.4	255	272.2	303.7	323.8
MAIN CAM
Moving Quantity of					0	18	21.5	26.5	29.5	35	38.5
MAIN ROD (mm)
MODE	HIGH
	MS-1
SENSOR	LOW
Output
	HIGH
	MS-2
	LOW
INCLINED BASE S/T UNIT								PRESS
PINCH ROLLER BLOCK								PRESS
P5 ARM ASS'Y				(T BRAKE:LOW)				P5-ON (T BRAKE HIGH)
TENSION LEVER									S BRAKE:HIGH
						S BRAKE:LOW
TENSION ARM ASS'Y							BRAKE-ON
(S REEL BRAKE)
TENSION CONNECT					BRAKE-ON
(S REEL BRAKE)
											BRAKE-ON
T BRAKE ARM					BRAKE-ON
(T REEL BRAKE)
CLUTCH LEVER					CLUTCH-ON					DIRECT
LINK UNIT						PRESS
				UP
FLAP LEVER

1-25

TROUBLESHOOTING GUIDE

(VCR SECTION)

POWER DOES NOT TURN ON

Does display light?	NO		Is the voltage	NO		Check of T501
			linked to L506?			and peripheral circuit.
YES			YES
			Check of V651
			and peripheral circuit.
Is the voltage at
		NO
						Check IC3001.
pin 30 of IC 3001
0V?
YES

Check of T501 and peripheral circuit.

1-26