Drum Assembly Replacement - Sony HDW-750 Maintenance Manual

7-3. Drum Assembly Replacement

7-3. Drum Assembly Replacement
Overview
Replacement
Removing the cleaning assembly
Removing connector from brush assembly
Removing the full top sensor assembly
Removing the drum assembly
Cleaning the drum contact surface
Installing the new drum assembly
Installing the full top sensor assembly
Installing the cleaning assembly
Connecting the connector to brush assembly
Cleaning the cleaning assembly and tape running surface
Adjustments after replacement
Tape run adjustment
Video tracking adjustment
CTL head height adjustment
CTL head position adjustment
CUE/TC head height adjustment
CUE/TC head position adjustment
Drum phase adjustment
Note
If rotary heads are worn out or broke, replace the entire upper drum assembly. The
head chip cannot be replaced independently.
Basic Information
Apart from the periodic replacement time, the upper drum assembly needs to be
replaced in the following cases.
. If a correct RF waveform cannot be obtained after the tracking adjustment.
Preparations
Preparation on unit's side
1. Check that the unit is in the unthreading-end state.
2. Turn off the main power.
3. Remove the front lid and outside panel assembly. (Refer to Section 1-4.)
n
The upper drum assembly can be replaced when the cassette compartment attaches
to the unit.
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HDW-750/750CE V1