Sony SLV-E420CP, SLV-E420VC, SLV-E520CP, SLV-E520UX, SLV-E520VC Service Manual

SLV-E420CP/VC/E520CP/UX/VC

RMT-V206/V206A/V207/V207A

SERVICE

System (SLV-E520UX)

System (EXCEPT SLV-E520UX)

MANUAL

Channel coverage

PAL (I) : UHF B21 - B69

RF output signal

UHF I21 - 69 CH

Aerial out

75-ohm asymmetrical aerial socket

Channel coverage

PAL (B, G) : VHF E2 - E12 (comprese channel C) (A - H only For Italy) UHF E21 - E69 CATV S01 - S03, S1 - S20 HYPER BAND S21 - S41

Intermediate frequency

F1 - 1 Video 38.9MHz F2 - 1 Audio 33.4MHz

RF output signal

UHF G22 - 69

Aerial out

75-ohm asymmetrical aerial socket

AEP Model

SLV-E420CP/VC/E520CP/VC

UK Model

SLV-E520UX

Photo : SLV-E520UX

SPECIFICATIONS

General

Power requirements 220 – 240 V AC, 50 Hz Power consumption 17 W 6W (standby) Operating temperature 5°C to 40°C Storage temperature –20°C to 60°C Dimensions Approx. 360 x 97 x 298 mm (w/h/d) including projecting parts and controls Mass Approx. 3.7 kg

Supplied accessories

Remote commander (1) R6 (size AA) batteries (2) Aerial cable (1) Mains lead (1)

Design and specifications are subject to change without notice.

MICROFILM

Inputs/outputs

ÚEURO-AV1

21-pin Video input : pin 20 Audio input : pins 2 and 6 Video output : pin 19 Audio output : pins 1 and 3

J EURO-AV2 (2nd Scart)

21-pin Video input : pin 20 Audio input : pins 2 and 6 Video output : pin 19

Audio output : pins 1 and 3 Front Line In (Except SLV-E420CP/VC) VIDEO IN, Phono jack (1) Input signal : 0.5 –1.5 Vp-p

75 ohms, unbalanced, sync negative AUDIO IN, Phone jack (1) Input level : –8 dBs (0 dBs = 0.755 Vrms) Input impedance : more than 47 kilohoms

J VIDEO CASSETTE RECORDER

SAFETY CHECK-OUT

After correcting the original service problem, perform the following safety check before releasing the set to the customer :

1. Check the area of your repair for unsoldered or poorly-soldered connections. Check the entire board surface for solder splashes and bridges.

2. Check the interboard wiring to ensure that no wires are “pinched” or contact high-wattage resistors.

3. Look for unauthorized replacement parts, particularly transistors, that were installed during a previous repair. Point them out to the customer and recommend their replacement.

SAFETY-RELATED COMPONENT WARNING!!

COMPONENTS IDENTIFIED BY MARK ! OR DOTTED LINE WITH MARK ! ON THE SCHEMA TIC DIAGRAMS AND IN THE P ARTS LIST ARE CRITICAL TO SAFE OPERA TION. REPLACE THESE COMPONENTS WITH SONY PARTS WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY.

4. Look for parts which, though functioning, show obvious signs of deterioration. Point them out to the customer and recommend their replacement.

5. Check the B+ voltage to see it is at the values specified.

– 2 –

TABLE OF CONTENTS

Section Title Page

______ ____ ____

Section Title Page

______ ____ ____

1. GENERAL

Step 1 Setting up the remote commander ..................... 1-1

Step 2 Connecting the VCR .......................................... 1-1

Step 3 Tuning the TV to your VCR............................... 1-1

Step 4 Selecting a language........................................... 1-2

Step 5 Tuning the VCR to TV Channels ....................... 1-2

Step 6 Setting the Clock ................................................ 1-2

Additional Tuning Instructions ..................................... 1-3

Setting a Satellite Tuner ................................................ 1-3

Playing a Tape ............................................................... 1-3

Recording TV Programmes........................................... 1-4

Recording TV Programmes using Video Plus + ........... 1-4

Playing/Searching at Various Speeds ............................ 1-5

Setting the Timer Manually........................................... 1-5

Recording TV Programmes using the Quick Timer...... 1-6

Checking/Cancelling Timer Settings............................. 1-6

Searching using the index function ............................... 1-6

Editing with another VCR............................................. 1-7E

Adjusting the Picture..................................................... 1-7E

Visual index................................................................... 1-7E

2. DISASSEMBLY

1-1. Removal of Cabinet, Mechanism Unit and Main

Board ..................................................................... 2-1

Removing the Cabinet Parts .................................. 2-1

Removing the Mechanism Main Unit and the

CP-1 PWB Assembly............................................. 2-1

l-2. Temporarily Setting Up and Connecting

CP-1 PWB Assembly............................................. 2-3E

1-3. Installation of the Front Panel................................ 2-3E

3. DIAGRAMS

Circuit Boards Location ................................................ 3-1

Overall wiring Diagram ................................................ 3-3

Mechanism Connection Diagram.................................. 3-5

Video Circuit Diagram .................................................. 3-6

System Control & Servo Circuit Diagram ................... 3-9

Audio Circuit Diagram.................................................. 3-12

Terminal & Input/ Output Selector Circuit Diagram

(Except SLV-E520UX).................................................. 3-13E

4. SCHEMATIC DIAGRAMS AND PRINTED WIRING BOARDS

CP-1 Board (PW-A) Power Supply Circuit Diagram.... 4-1

CP-1 Board (AD-A) Terminal &

Input/Output Selector .................................................... 4-3

CP-1 Board (VA-A) Video & Audio Circuit Diagram

(Except SLV-E520UX).................................................. 4-5

CP-1 Board (VA-A) Video & Audio Circuit Diagram

(SLV-E520UX).............................................................. 4-7

Video Circuit Waveforms .............................................. 4-9

VP-1 Board Video Pre-Amp circuit Diagram ............... 4-10

CP-1 Board (SV-A) Servo Circuit Diagram .................. 4-12

Servo Circuit Waveforms .............................................. 4-14

CP-1 Board (SY-A) System Control, Timer & Tuner

(Except SLV-E520UX).................................................. 4-15

IC 301 System Control, Timer & Tuning Control MPU Pin

Functions T able ............................................................. 4-16

CP-1 Board (SY-A) System Control, Timer & Tuner

(SLV-E520UX).............................................................. 4-17

TM-1 Board Operation Key Circuit Diagram ............... 4-23

TM-2 Board Circuit Diagram........................................ 4-25

A7101 Display (FLD) Grid/Anode Assignment

Drawing & Table ........................................................... 4-26

TM-9 Board PDC/VPS (SLV-E520VC, SLV-E420VC &

SLV-E520UX) ............................................................... 4-27E

5. ADJUSTMENTS

1. Maintaining and Checking the Mechanism............... 5-1

l -1. Regular Checks and Maintenance Items............... 5-1

1-1-1. Regular Checks................................................ 5-1

1-1-2. Cleaning............................................................ 5-1

1-2 Service Tools........................................................... 5-2

1-2-1. Service Tools ................................................... 5-2

1-2-2. Using the Relay Cable (VHJ-0106).................. 5-3

2. An Overview of the Mechanism................................ 5-3

2-1. Names of the Main Parts........................................ 5-3

2-1-1. Cassette Mechanism Assembly ........................ 5-3

2-1-2. Top View .......................................................... 5-4

2-1-3. Under Side ........................................................ 5-4

2-2. An Overview of the Mechanism Modes ................ 5-5

2-2-1. Mechanism Mode Switching Table .................. 5-5

2-2-2. Movement Check List for the Main Parts of the

Mechanism........................................................ 5-6

2-2-3. How to Check the Mechanism

Mode Position................................................... 5-6

2-2-4. Self-Diagnosis Display ..................................... 5-6

3. Disassembling the Main Parts of the Mechanism ..... 5-7

3-1. How to Make the Mechanism Move...................... 5-7

3-1-1. How to Operate the Loading Motor Using

A DC Voltage Supply....................................... 5-7

3-1-2. Operating the Loading Motor

by the Manual Method...................................... 5-7

3-1-3. Making the Mechanism Move

Using the Manual Method ................................ 5-7

3-2. Mechanism Unit..................................................... 5-8

3-3. Cassette Drive Mechanism..................................... 5-8

3-3-1. Cassette Mechanism Assembly ........................ 5-8

3-3-2. Cassette Drive Gear .......................................... 5-9

3-3-3. Door opener, Under Frame and Stand L........... 5-9

3-3-4. Start Rack Gear and Front Rack Gear .............. 5-10

3-4. Cleaner Roller Assembly ....................................... 5-10

3-5. Cylinder (DRUM) .................................................. 5-11

3-5-1. Upper Cylinder Assembly (UPPER DRUM) ... 5-11

3-5-2. Cylinder Motor (ROTOR and STATOR) .......... 5-12

3-5-3. Cylinder Assembly ........................................... 5-12

3-6. FE Head and ACE Head ......................................... 5-13

3-6-1. Audio R/P Head Assembly (ACE HEAD)........ 5-13

3-6-2. Full Erase Head ................................................ 5-13

3-7. Capstan Motor........................................................ 5-14

3-7-1. Capstan Motor .................................................. 5-14

3-7-2. Capstan Brake Assembly.................................. 5-14

3-8. Loading Motor Assembly and

Worm Gear Assembly............................................ 5-15

3-9. Pinch Roller Pressure Mechanism ......................... 5-15

3-9-1. Pinch Roller Lever Assembly ........................... 5-15

3-9-2. Pinch Lift Cam and Pinch Cam Gear ............... 5-16

3-10. L Guide Lever Assembly and

Load Lever Assembly .......................................... 5-17

3-11. BT Lever Assembly ............................................. 5-17

3-12. Reel Drive Mechanism......................................... 5-18

3-12-1. Reel belt, Reel Pulley, Friction Gear

Assembly and Clutch Change Lever............... 5-18

3-12-2. Clutch Mounting Assembly............................ 5-18

3-12-3. S Soft Lever, Supply Reel Assembly

and S Reel Gear .............................................. 5-18

3-12-4. T Soft Brake Assembly, Take Up Reel

Assembly, T Reel Gear ................................... 5-19

3-13. Brakes .................................................................. 5-19

3-13-1. S Brake Assembly, T Brake

Assembly, T Brake ACT Slide........................ 5-19

3-13-2. Brake Control Lever and Brake ACT Lever

Assembly ........................................................ 5-20

– 3 –

Section Title Page

______ ____ ____

3-13-3. S Brake ACT Slide and BT Spring Lever

Assembly ........................................................ 5-20

3-14. Guides .................................................................. 5-21

3-14-1. Guide Roller Assembly................................... 5-21

3-14-2. S and T Incline Mounting Assemblies............ 5-21

3-15. Wheel Gear 2, Main Cam and Mode Switch ....... 5-22

3-16. Crescent Slide ...................................................... 5-23

3-17. S Load Gear, T Load Gear, S Load Lever

Assembly and T Load Lever Assembly ............... 5-24

3-18. Tape Sensors, Reel Sensor and EP SW Lever...... 5-25

3-18-1. Tape Top Sensor and Tape End Sensor ........... 5-25

3-18-2. Reel Sensor ..................................................... 5-25

3-18-3. EP Switch Lever ............................................. 5-25

4. Mechanism Checks and Adjustments........................ 5-26

4-1. Reel Table Torque Check ....................................... 5-26

4-2. Adjusting the BT Lever Assembly Position and

Checking the Back Tension Torque in Play Mode. 5-26

4-2-1. BT Lever Pole Position Adjustment ................. 5-26

4-2-2. Checking the Back Tension Torque

Play Mode......................................................... 5-26

4-3. T ape Path Adjustment ............................................ 5-27

4-3-1. Adjustment Procedure ...................................... 5-27

4-3-2. Load Lever Assembly Height Adjustment........ 5-27

4-3-3. Guide Roller Height Adjustment ...................... 5-28

4-3-4. Audio R/P Head (ACE HEAD) Height

Adjustment, Azimuth Adjustment and

Horizontal Position Adjustment........................ 5-29

4-3-5. Checking After Adjustment .............................. 5-30E

6. ELECTRICAL ADJUSTMENTS

Circuit Boards Location ................................................ 6-1

Self -Diagnosis Display................................................. 6-2

1. Self-Diagnosis Contents and Mechanism Mode

Display ...................................................................... 6-2

2. Electrical Adjustment ................................................ 6-4

2-1. Servo Circuit Adjustment....................................... 6-4

2-1-1. Test Equipment and Standards Required .......... 6-4

2-1-2. Location of Adjustment Points ......................... 6-4

2-1-3. Switching Position Adjustment ........................ 6-5

2-2. Video Circuit Relay Jig .......................................... 6-6

2-2-1. Test Equipment and Standards Required .......... 6-6

2-3. IF Circuit Adjustment ............................................ 6-7E

2-3-1. Test Equipment and Standard Required ........... 6-7E

2-3-2. Location of Adjustment Point........................... 6-7E

2-3-3. RF AGC Adjustment........................................ 6-7E

3. Test Points for Tape Path Adjustment ....................... 6-7E

7. EXPLODED VIEWS

7-1. Cabinet & Chassis Parts......................................... 7-1

7-2. Mechanism Parts-1................................................. 7-2

7-3. Mechanism Parts-2................................................. 7-3E

8. ELECTRICAL PARTS LIST ................................. 8-1

Hardware List................................................................ 8-9E

– 4 –

SECTION 1

GENERAL

SLV-E420CP/VC/E520CP/UX/VC

This section is extracted from SLV-E520UX instruction manual.

1-1

1-2

1-3

1-4

1-5

1-6

1-7E2-1

SLV-E420CP/VC/E520CP/UX/VC

SECTION 2

DISASSEMBLY

1-1. REMOVAL OF CABINET, MECHANISM UNIT, AND MAIN BOARD

REMOVING THE CABINET PARTS (Fig. 1-1-1 )

1. Remove the cabinet and bottom cover by removing the four screws 1 and four screws 2 .

2. Pull out the shuttle knob by fingers together with the button assembly, and remove the front panel by removing the locks of the clamps (A) using a screwdriver. etc., and slightly rotating the bottom part in the direction of the arrow.

Notes: • Electrical adjustments for the this model can be

performed with only the cabinet removed.

• When replacing the bottom cover, do not tighten the screws 2 too much. Excess tightness may damage the screw taps on the chassis.

REMOVING THE MECHANISM MAIN UNIT AND THE CP-1 PWB ASSEMBLV (Fig.1-1-2 and 1-1-3)

After removing the cabinet parts, remove the mechanism unit and the CP-1 PWB assembly connected as follows.

1. First, remove the red screw 3 of the TB-1 PWB, spread out lock clamps (B) and (C) in the arrow direction slightly and remove TM-1 PWB and TM-2 PWB as shown in Fig. 1-1-2.

2. Remove the screw 4 at the back of the chassis.

3. Remove the red screw 5 in the chassis, remove the red screw 6, and remove the holder in this order.

4. Remove the two screws 7 and two screws 8 of the mechanism unit. The two screws 8 of the cassette tray can be removed easily by pushing the tray lock lever in the arrow direction to remove the lock as shown in the enlarge view A and by pushing the lid opener lever in the arrow direction to remove the lock as shown in the enlarge view B.

5. Lift up the whole mechanism unit and main board (CP-1 PWB assembly), and as shown in Fig. 1-1-3. push the two lock clamps (D) of the chassis i n the arrow direction so that they can be removed from the chassis.

Front Panel

Clamps (A)

Cabinet

Main Unit

Bottom Cover

Button Assembly

Shuttle Knob

Fig. 1-1-1

Tray Lock Lever

TM-2 PWB

(B)

Terminal Board

(C)

(B)

(C)

Holder

Lid Opener Lever

TM-2 PWB

TM-1 PWB

Mechanism Main Unit

TM-1 PWB

Chassis

Cassette Tray

Fig. 1-1-2

VP-1 PWB Assembly

CP-1 PWB Assembly

Clamps (D)

Chassis

Fig. 1-1-3

2-2

1-2. TEMPORARILY SETTING UP AND CONNECTING CP-1 PWB ASSEMBLY

The following is an example of how to place and connect the main board without a jig, when repairing the CP-1 PWB assembly.

1. Place the mechanism unit and main board up side down as a whole on a flat surface with the foil side of the main board facing up.

CP-1 PWB Assembly (Foil side)

2. Operate the unit using the buttons on TM-1 PWB or the remote control.

Screws

Mechanism Main Unit

TM-1 PWB

Cassette Compartment

TM-2 PWB

1-3. INSTALLATION OF THE FRONT PANEL

When installing the front panel to the chassis after repaires and adjustments.

Terminal Board

Fig. 1-1-4

1.Pressing down the door opener lever of the mechanism main unit.

2. Set the cassette door to half-opened state as shown in Fig. 1-1-5, and install the front panel to the chassis.

Jutted part of Cassette Holder

Front Panel

Cassette Door (Position A)

Note: Opened cassette door position does not install the

front panel to the chassis.

Door Opener Lever

Cassette Door (Position B)

Fig. 1-1-5

2-3

CIRCUIT BOARDS LOCATION

SLV-E420CP/VC/E520CP/UX/VC

SECTION 3

DIAGRAMS

TM-2 PWB

3 in 1 Tuner (Tuner / RF Conv.)

TM-1 PWB

VP-1 PWB Assembly

CP-1 PWB Assembly

TM-9 PWB

3-1

SECTION 5

Tape path surface

Video head

Cylinder (Drum)

ADJUSTMENTS

1. MAINTAINING AND CHECKING THE MECHANISM

SLV-E420CP/VC/E520CP/UX/VC

1-1. REGULAR CHECKS AND

MAINTENANCE ITEMS

To obtain full function and maximum performance from the set, and to stop it getting dirty or scratched, we recommend that you carry out the following maintenance procedures and regular checks. The maintenance checks described in the following section should also be carried out without fail after carrying out any repairs to the set.

1-1-1. REGULAR CHECKS

NOTE: OIL AND GREASE

• Always use the specified brands of oil and grease. If you use a grease with the wrong viscosity, for example, this can lead to all sorts of problems. Be careful to keep the oil and grease free of dust and foreign bodies.

• A “drop” of oil is the amount of oil remaining on the tip of a rod with a diameter of 1.5mm after it is dipped in oil to a depth of 1cm and then taken out.

Clean Check Oil

Hours of use (H)

Part maintained 500 1000 1500 2000 2500 3000 3500 4000 4500 5000 Remarks

Tape guide

Tape path system

ACE head, full erase head Cylinder (drum)

( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( )

The life of parts varies enormously, depending on the environment in which the part is used.

Cleaner roller assembly Pinch roller

Reel table Drive Reel belt system

Relay gear, Pulley shaft, Gear shaft

Loading motor

Back tension

Playback tension torque: 30 to 50g/cm

Perform- Brake system ance checks FWD, REW, PLAY torque,

REV torque

FWD: 600g/cm or over REW: 600g/cm or over PLAY (SP mode): 80 to I 40g/cm REV: 120 to 220g/cm

1-1-2. CLEANING

1. Cylinder (Drum) (See Fig.1-1-1 )

Moisten a chamois with methyl alcohol and clean the video head (including the Hi-Fi audio head) and the tape path surface of the cylinder. Be sure to wipe horizontally in relation to the video head. If you wipe vertically, or use excessive force, you can damage the video head.

2. Tape Path System / Reel Drive System

Clean the pinch roller, the capstan shaft, the tape guides, the FE head, the ACE head, the reel table, the pulley and the reel belt with a soft cloth, or chamois, moistened with methyl alcohol.

Fig.1-1-1

5-1

1-2. SERVICE TOOLS

1-2-1. SERVICE TOOLS NOTES ON ALIGNMENT TAPES

Select a PAL or NTSC alignment tape from the list below, according to the transmission system of the VCR you are repairing. PAL: For models with 625 scanning lines and a field frequency of 50Hz NTSC: For models with 525 scanning lines and a field frequency of 60Hz

No. Tool

NTSC PAL

Remarks

1 Alignment tape VHJ-0005 VHJ-0008 SP colour bar 1kHz (normal) 2 Alignment tape VHJ-0006 VHJ-0009 SP monoscope 7kHz (normal) 3 Alignment tape VHJ-0007 –––––––– EP monoscope 4 Alignment tape –––––––– VHJ-0052 LP monoscope 5 Eccentric screw driver VHJ-0003 Used to adjust the tape path

Tool No.

6 Nut box VHJ-0048

7 Torque dial gauge VHJ-0004

8 Cassette torque meter VHJ-0016

9 Load lever assembly height adjustment tool VHJ-0102

10 Torque gauge screwdriver VHJ-0014

11 3 mm dia. bit for torque screwdriver VHJ-0045

Used to adjust the height of the lever load assembly Used to measure reel winding torque Used to measure back tension torque Used to adjust the height of the load lever assembly Used to adjust the tightening torque of screws Used to replace the bit of the torque

gauge screwdriver 12 Video head removing tool VHJ-0041 Used to remove the upper cylinder 13 Oil VHJ-0099 14 Grease VHJ-0100 15 Grease VHJ-0101

16 Relay cables VHJ-0106

Relay cables of mechanism and

CP-1 PWB assembly

VHJ-0005, VHJ-0006, VHJ-0007

No. 1, 2, 3, 4

VHJ-0016

No. 8

VHJ-0041

No. 12

VHJ-0003

VHJ-0102

VHJ-0099

No. 5

No. 9

No. 13

VHJ-0048

VHJ-0014

No. 10 No. 11

VHJ-0100, VHJ-0101

No. 14, 15 No. 16

VHJ-0004

No. 6 No. 7

VHJ-0045

VHJ-0106

Fig.1-2-1

5-2

1-2-2. Using the Relay Cable (VHJ-0106)

The mechanism can be repaired without using the relay cable (VHJ-0106). As shown in Fig. 1-3-1, the relay cable (VHJ-0106) is a tool used for relay between the CP-1 PWB assembly and mechanism unit. When connecting it, take note of the pin number of the connector.

NOTE 1: Do not place the mechanism upright as shown

in Fig. 1-3-1 when inserting/ejecting the cassette.

NOTE 2: For NTSC models, be sure to connect the VM-1

PWB assembly and CP-1 PWB assembly.

2. AN OVERVIEW OF THE MECHANISM

CP-1 PWB assembly

VM-1 (VP-1) PWB assembly

Relay cable: VHJ-0106

Mechanism unit

Fig. 1-2-2

2-1. NAMES OF THE MAIN PARTS

2-1-1. CASSETTE MECHANISM ASSEMBLY

Stand L

Under frame

Tray lock spring

Release lever

Lid opener spring

Pinion gear

Door opener lever

Lock gear

Gear holder

Drive gear

Fig. 2-1-1

5-3

2-1-2. T OPVIEW

Cleaner roller assembly

Cylinder (Drum)

Capstan brake assembly

Cleaner lever

Audio R/P head assembly (ACE head)

Capstan motor

Cylinder mounting

Guide roller assembly

T incline mounting assembly

Full erase head

S incline mounting assembly

Guide roller assembly

Tape end sensor

BT lever assembly

Tape sensor LED

BT spring

Band brake assembly

Supply reel assembly

S soft lever

EP switch

2-1-3. UNDERSIDE

EP sw lever

T brake assembly

S brake assembly

S reel gear

T brake act slide

Clutch mounting assembly

T reel gear

Pinch roller lever assembly

Pinch lift cam

Pinch lift mounting

Front rack gear

Opener mounting

Pinch cam gear

Start rack gear

Load lever assembly

Tape top sensor

L guide act lever assembly

T soft brake assembly

Take-up reel assembly

Fig. 2-1-2

Harness mounting

Pinch cam gear

Mode switch (S8001)

Brake control lever

Main cam

Clutch change lever

Crescent slide

Wheel gear 2 Wheel gear 1

Reel belt

Capstan motor

Brake act lever assembly

Worm gear assembly

Cylinder earth assembly

Reel pulley

Loading motor assembly

Stator

Rotor

T load gear

S load gear

Crescent mounting

T load lever assembly

S load lever assembly

BT spring lever assembly

MC-1 PWB assembly

S brake act slide

Friction gear assembly

5-4

Fig. 2-1-3

2-2. AN OVERVIEW OF THE MECHANISM MODES

2-2-1 . MECHANISM MODE SWITCHING TABLE

NOTE:

HEX

DATA

0 7

0 1 0

0 2

The letters and figures enclosed in circles in the mechanism mode column are the codes on the crescent slide.

Mechanism mode

EJECT E Distinguished by whether the EP switch is ON or OFF. Horizontal shift section. Vertical shift section.

IN REW R

INITIAL 7

Cleaner roller assembly: ON S/T mounting incline assembly pressure begins. S/T mounting incline assembly pressure ends.

REVIEW 1

IDLER pos. 2 (Pinch roller OFF)

When loading is carried out starting at the CASSETTE IN position

The principal mode-switching states of the mechanism

CASSETTE OUT

(EJECT)

IN REW

(SHORT REW)

INITIAL

(POWER OFF)

REVIEW

STILL/SLOW 3

PLAY/STOP 5

0 4

BRAKE pos. 4

FF/REW 6

MODE SWITCH OUTPUT TABLE

HEX SW DATA SW DATA 2

DATA1XYZ

0 5.0V H H H 5V 1 5.0V H H L 0V 2 2.5V H L H 5V 3 2.5V H L L 0V 4 3.4V L H H 5V 5 3.4V L H L 0V 6 2.0V L L H 5V 7 2.0V L L L 0V

STILL/SLOW

REC PAUSE REC STOP P LAY CUE

REW

APPEARANCE OF MODE SWITCH AND RELATIONSHIP BETWEEN MODE POSITIONS

FF/REW EJECT

BRAKE

CASSETTE IN

PLAY/STOP

STILL/SLOW

IDLER

REVIEW

IN REW

INITIAL

5-5

Fig. 2-2-1

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