VC-MH722HM (serv.man6). Part 4 - Mechanical adjustments and assemblies (9-27) - Sharp VCR Service Manual (repair manual). Page 14

1. Set the ejection mode.
2. Withdraw the main power plug from the socket.

• Removal (Perform in numerical order.)
1. Disconnect the FFC cable 

1

.

2. Unscrew the D.D. stator assembly fixing screws 

2

.

3. Take out the D.D. stator assembly 

3

.

4. Unscrew the D.D. rotor assembly fixing screws 

4

.

5. Take out the D.D. rotor assembly 

5

.

Notes:
1. In removing the D.D. stator assembly, part of the drum

earth spring pops out of the pre-load collar.
Be careful not to lose it.

2. Install, so that the D.D. rotor ass'y and upper drum ass'y

mounting direction check holes align.
(Align the upper drum dent with the rotor hole.)

3. Be careful not to damage the upper drum or the video

head.

4. Protect the hole elements from shock due to contact with

D.D. stator or D.D. rotor ass'y.

5. After installation adjust the playback switching point for

adjustment of servo circuit.

• Remove the mechanism from the main PWB (refer to

Page 5 item 1. When removing the mechanism from the
main PWB").

1. Remove the reel belt 

1

.

2. Remove the three screws 

2

.

• Reassembly
1. Taking care so that the capstan shaft does not contact

the mechanism chassis, set its position on the mecha-
nism chassis, and then install with the three screws.

2. Install the reel belt.
Notes:
1. After installing the capstan D.D. motor, be sure to rotate

the capstan D.D. motor and check the movement.

2. Set the tape, and check for the tape crease near the

reverse guide in the playback mode. Adjust the A/C
head and azimuth as stated in Page 20 Replacement 2.
If crease is found, adjust as stated in Page 19 "HEIGHT
ADJUSTMENT OF REVERSE GUIDE".

Capstan D.D.
motor

Capstan D.D. motor
control PWB

2

1

2

4

4

5

D.D. stator ass'y

D.D. rotor ass'y

Reel belt

Upper drum

3

1

FFC