Periodic Check List - Sony DNW-7 Maintenance Manual

7-2. Periodic Check

7-2-2. Periodic Check List

Replacement time shown in the following list is not the guarantee term parts. Use this list as guidelines
for the maintenance and inspection. The replacement time of the parts varies depending on the operation
environment and conditions of the unit.
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The parts marked with " " will be replaced at the same time when the part pointed by " " is replaced.
As for replacement procedures for the parts shown in the table, refer to the maintenance manual Part2
Volume1, Section3.
Mode A : Drum running hour
Mode B : Tape running hour
No. Item
1 Upper drum
2 Slip ring
3 Brush for slip ring
4 Drum
5 VH cleaner
6 Tension regulator band
7 Reel drive gear
8 Pinch roller
The "R" mark in this table indicates the replacement timing of parts.
. Check sometimes the deformation of the eye cap of the viewfinder, and the reduction of the emission
current of the CRT. Replace them as necessary.
. Replace the lithium battery on the TC-80 board every five years.
7-8
Mode Inspection hours (h)
2000 4000 6000
A R R
A R R
A R R
_ _
A R
A R R R
B _ R _
B _ R _
B R R R
6
7
Replacement parts
Part name
Upper drum assy DJR-15-R
Slip ring assy (RP)
Brush assy (RP)
Drum assy DJH-15A-R
VH cleaner assy
Tension regulator band assy
Reel drive gear assy
Pinch roller assy
1 2
5
3
8
Part No.
A-8311-299-
A-8311-292-
A-8311-293-
A-8311-298-
A-8278-366-
X-3678-683-
A-8278-365-
X-3678-926-
4
DNW-7/90/90WS