How To Replace The Photo Sensors On The Mdc-13 Board - Sony HDW-750 Maintenance Manual

1-25. How to Replace the Photo Sensors
on the MDC-13 Board
The four photo sensors (PH301 to PH304) are installed on
the MDC-13 board of this unit.
To replace these photo sensors, the accurate position
setting of the sensors is required with the use of the DIF-
110 sensor mount tool.
Required tool : DIF-110 sensor mount tool
(Part No. J-6531-100-A)
n
If the sensors are not mounted in the correct positions, the
cam gear position will not be correctly detected, which that
causes malfunction of the unit.
G
H
F E
PH302
PH301
PH304
1. Remove soldering from the photo sensor that you want
to replace and remove the photo sensor.
2. Place a new photo sensor on a solder land tentatively.
Be careful to place a new photo sensor in the correct
direction. (Refer to the illustration below.)
White line on
the photo sensor
Photo sensor
HDW-750/750CE V1
C
D
B
1
A
2
3
4
5
PH303
6
MDC-13 board (B side)
Silk screen on the
board (Thick line)

1-25. How to Replace the Photo Sensors on the MDC-13 Board

3. Align the two projections of the sensor mount tool
with the holes of the board.
Sensor mount tool
Projection
Hole
4. Solder the two leads of a photo sensor by soldering.
Solderings
(two leads tentatively)
Hole of the sensor
mount tool
Hole of the sensor mount tool
5. Remove the sensor mount tool and solder the four
leads of the photo sensor.
Photo sensor
Solderings
Projection
Hole
Solderings
1-63