CD-MPS777H Service

CD-MPS777H

CHAPTER 3.

MECHANISM BLOCKS

[1] Caution on diassembly

Caution on Disassembly

Follow the below-mentioned notes when disassembling the unit and reassembling it, to keep it safe and ensure excellent performance:

1. Take cassette tape and compact disc out of the unit.

2. Be sure to remove the power supply plug from the wall outlet before starting to disassemble the unit.

3. Take off nylon bands or wire holders where they need to be removed when disassembling the unit. After servicing the unit, be sure to rearrange the leads where they were before disassembling.

CD-MPS777H

STEP

REMOVAL PROCEDURE

1 Top/Side Cabinet 1. Screw .................... (A1) x11

2 Changer Unit/

Rear Panel B

1. Screw ...................... (B1) x2

2. Hook ........................ (B2) x2

3. Flat Cable................ (B3) x1

4. Socket ..................... (B4) x1

3 Rear Panel A with 1. Screw ...................... (C1) x6

Fan motor 2. Socket ..................... (C2) x1

4 Main PWB

5 Front Panel

1. Screw ...................... (D1) x2

2. Flat Cable ............... (D2) x1

3. Socket ..................... (D3) x4

4. Flat Wire .................. (D4) x1

5. Screw ...................... (D5) x2

1. Screw ...................... (E1) x2

2. Flat Wire .................. (E2) x1

3. Hook ........................ (E3) x2

6 Tape Mechanism 1. Open the cassette Cover.

2. Screw ....................... (F1) x6

3. Flat Cable ................ (F2) x1

7 Display PWB 1. Knob ........................ (G1) x1

2. Screw .................... (G2) x10

3. Hook ........................

(G3) x5

8 Game Input PWB 1. Screw...................... (H1) x2

9 CD Servo PWB 1. Screw ....................... (J1) x2

2. Flat Cable ................ (J2) x2

3. Socket ...................... (J3) x1

4. Hook ......................... (J4) x1

10 Changer 1. Screw ...................... (K1) x4

Mechanism Unit 2. Changer Chassis .... (K2) x1

11 CD Mechanism 1. Screw ....................... (L1) x4

Note:

After removing the connector for the optical pickup from the connector, wrap the conductive aluminium foil around the front end of the connector so as to protect the optical pickup from electrostatic damage.

(A1)x3

φ3x10mm

Rear Panel B

Top/Side Cabinet

Front Panel

(C2)x1

Main PWB

(B2)x1

Pull

Changer

Mechanism

Unit

Rear

Panel B

(B1)x2

φ3x10mm

Rear

Panel A

(C1)x6

φ3x10mm

(E3)x1

(D2)x1

(D3)x1

CD Servo

PWB

(B3)x1

(B4)x1

Front Panel

(B2)x1

Pull

Fan Motor

(D1)x1

φ3x18mm

Lug Wire

(D1)x1

Main PWB

φ3x10mm

(D3)x2

(E2)x1

Front Panel

(D4)x1

Power PWB

(D5)x2

φ3x10mm

(D3)x1

Rear Panel A

(A1)x5

φ3x10mm

(A1)x3

φ3x10mm

(E1)x2

φ3x8mm

Main

PWB

(E3)x1

3 – 1

(F2)x1

Front Panel

Tape

Mechanism

(F1)x6

φ3x10mm

Open

Cassette

Cover

Lug Wire

(G2)x10

φ2.6x10mm

Front Panel

Display PWB

(G3)x5

(G1)x1

Game Input

PWB

(H1)x2

φ3x10mm

(J3)x1

(J1)x2

φ3x10mm

(J4)x1

(K1)x4

φ3x10mm

(L1)x4

φ2.6x10mm

CD Mechanism

(K2)x1

Changer

Mechanism

Unit

Changer

Mechanism

Unit

CD-MPS777H

(J2)x1

(J2)x1

CD Servo

PWB

Changer

Mechanism

Unit

3 – 2

CD-MPS777H

CP-MPS777H

STEP

REMOVAL PROCEDURE

1

2

3

Passive Radiator 1. Screw ...................... (A1) x4

2. Side Panel .............. (A2) x1

3. Screw ...................... (A3) x4

Woofer

Tweeter

1. Front Panel ............. (B1) x1

2. Screw ...................... (B2) x4

1. Screw ...................... (C1) x2

4 Super Tweeter 1. Screw ...................... (D1) x4

Front Panel

Speaker Box

(A2)x1

(A1)x4

φ4x35mm

Passive Radiator

(C1)x2

φ3x12mm

Super Tweeter

(D1)x2

φ3x12mm

Tweeter

Super Tweeter

(D1)x2

φ3x12mm

(A3)x4

φ4x16mm

Passive Radiator

(B2)x4

φ4x16mm

Woofer

Speaker Box

(B1)x1

Screwdriver

Driver should be pried away from Speaker Box.

Speaker Box

3 – 3

CD-MPS777H

[2] Removing and reinstalling the main parts

1. TAPE MECHANISM SECTION

Perform steps 1 to 5 and 6 of the disassembly method to remove the tape mechanism.

1.1. How to remove the record/playback and erase heads

(TAPE 2) (See Fig. 1)

1. When you remove the screws (A1) x 2 pcs., the recording/playback head and three-dimensional head of the erasing head can be removed.

TAPE 2

Clutch Ass'y

Record/Playback

Head

Erase Head

(A1)x2

φ2x9mm

Figure 1

1.2. How to remove the playback head (TAPE 1)(See Fig. 2)

1. When you remove the screws (B1) x 2 pcs., the playback head can be removed.

TAPE 1

Clutch Ass'y

Playback

Head

Pinch Roller

(C1)x1

Pull

<B>

Figure 3

<A>

Pinch

Roller

Pawl

1.4. How to remove the belt (TAPE 2) (See Fig. 4)

1. Remove the main belt (D1) x 1 pc., from the motor side.

2. Remove the FF/REW belt (D2) x 1 pc.

1.5. How to remove the belt (TAPE 1) (See Fig. 4)

1. Remove the main belt (E1) x 1 pc., from the motor side.

2. Remove the FF/REW belt (E2) x 1 pc.

TAPE 2

FF/REW

Belt

(D2)x1

Tape

Motor

Tape

Motor

TAPE 2

Main Belt

(D1)x1

TAPE 1

Main Belt

(E1)x1

Main Belt

(D1)x1

Main Belt

(E1)x1

TAPE 1

FF/REW

Belt

(E2)x1

Figure 4

1.6. How to remove the motor (See Fig. 5)

1. Remove the screws (F1) x 2 pcs., to remove the motor.

Tape

Motor

(B1)x2

φ

2x9mm

Figure 2

1.3. How to remove the pinch roller (TAPE 1/2) (See Fig. 3)

1. Carefully bend the pinch roller pawl in the direction of the arrow

<A>, and remove the pinch roller (C1) x 1 pc., in the direction of the arrow <B>.

Note:

When installing the pinch roller, pay attention to the spring mounting position.

(F1)x2

φ 2.6x5mm

Clutch Ass'y

Figure 5

3 – 4

CD-MPS777H

2. CD MECHANISM SECTION

Perform steps 1, 2, 9, 10 and 11 of the disassembly method to remove the CD mechanism.

2.1. Remove the pickup. (See Fig. 1)

1. Remove the stop washer (A1) x 1 pc., to remove the gear (A2) x 1 pc.

2. Remove the screws (A3) x 2 pcs., to remove the shaft (A4) x 1 pc.

3. Remove the pickup.

Note

After removing the connector for the optical pickup from the connector wrap the conductive aluminium foil around the front end of connector so as to protect the optical pickup from electrostatic damage.

(A3)x2

φ 2.6x6mm

CD Mechanism

Shaft

(A4)x1

Gear

(A2)x1

Stop Washer

(A1)x1

Pickup Unit

Figure 1

3. CHANGER MECHANISM SECTION

Perform steps 1, 2, 9 and 10 of the disassembly method to remove the

CD changer mechanism.

3.1. How to remove CD Disc (See Fig. 2~5)

1. When CD is at play position (Figure 2), rotate reduction gear C clock-wise as shown in Figure 3 Until disc tray is at stock position, then rotate further to eject the disc tray so that CD can be removed from the tray.

Disc Tray

CD Disc

Guide Tray

Reduction gear C

Front Rear

Figure 3

2. In another case, if CD mechanism is at tray No.1 play position and to remove CD located in tray No.3, the procedure is as follows:

If the gear up down board is located at tray No.1 position, then rotate gear clock-wise until it at stock position. Rotate reduction gear D clockwise (Figure 4) to move the CD mechanism to tray

No.3 position.This is confirmed by checking the gear up down board position by the marking as indicated on the main chassis as shown in Figure 5.

Reduction gear D

Up

Figure 4

Down

Gear up down board

Mark 1

(DISC 1)

Mark 3

(DISC 3)

Mark 2

(DISC 2)

Mark 5

(DISC 5)

Mark 4

(DISC 4)

Figure 5

CD Disc

CD At play position.

CD At stalk position.

Figure 2

3 – 5

3.2. How to Remove the tray motor/main cam motor/5-

Changer Motor PWB (See Fig. 6)

1. Remove the screws (A1)x 2 pcs., to remove tray motor/main cam motor/5-Changer Motor PWB.

Changer Mechanism Unit

Main Cam Motor

Tray Motor

(A1)x2

φ2x10mm

5-Changer

Motor PWB

Figure 6

NOTE: There are 2 more screws tighten the motors at the bottom of main chassis. Before performing procedure 1 above, disc stop spring, top plate sear up down board and trays must be removed, then only the 2 screws can be untighten.

CD-MPS777H

3 – 6