Hours Meter - Sony DNW-A75 Maintenance Manual

5-1. Periodic Maintenance
Replace the parts shown in the table below periodically when the threading/un-
threading operation is repeated frequently.
Replacement parts
Brake solenoid
S tension regulator
T tension regulator
T drawing arm assembly
Gear box assembly
Threading ring assembly
Ring roller
Pinch arm guard
CL guide rail
Cassette compartment assembly
Video head cleaner
AT head cleaner
Pinch roller

5-1-3. Hours Meter

This unit can display an hours meter on the time data display area of the lower
control panel. Perform a periodic check with this hours meter as a reference.
1. Contents of display
Menu No. Display
H01 OPERATION HOURS
H02 DRUM RUNNING HOURS
H03 TAPE RUNNING HOURS
H04 THREADING COUNTER
H12 DRUM RUNNING HOURS
H13 TAPE RUNNING HOURS
H14 THREADING COUNTER
H15 TTP FAN OPERATION HOURS
2. Display procedure
1. Press the MENU button on the lower control panel.
2. Put the "*" to the desired ITEM by turning the search dial.
3. Press the SET button on the lower control panel to display the hours meter.
4. Press the MENU button once and repeat from step 2 to display other ITEM.
Press the MENU button twice to exit the MENU.
5-4
Replacement period
Every 200,000 times of threading
Every 200,000 times of threading
Every 200,000 times of threading
Every 200,000 times of threading
Every 200,000 times of threading
Every 200,000 times of threading
Every 200,000 times of threading
Every 200,000 times of threading
Every 200,000 times of threading
Every 200,000 times of threading
Every 1,000 hours of drum rotating
Every 1,000 hours of drum rotating
Every 1,000 hours of drum rotating
Contents
Sum of energized time
Sum of drum rotating time
Sum of tape running time
Sum of threading
Sum of drum rotating time (Resettable)
Sum of tape running time (Resettable)
Sum of threading (Resettable)
Sum of TTP fan operating time (Resettable)
Part No. Name
1-454-417-31 Solenoid, Plunger
A-8267-795-E Tension regulator assembly (RP)
A-8267-423-C T-tension regulator assembly
A-8274-876-F Drawer assembly (T)
A-8323-825-A Box assembly (RP), Gear
A-8267-395-F Ring assembly, Threading
3-180-677-01 Roller, Ring
3-180-679-01 Roller (B), Ring
3-180-853-01 Guard, Pinch arm
3-180-874-02 Rail, CL guide
A-8267-589-F Cassette compartment (RP)
A-8320-546-A Roller (B) assembly (RP),
V cleaning
3-182-765-02 Spacer, CR
X-3167-053-2 Arm assembly, CL
X-3167-054-4 Arm assembly, Pinch
Q'ty
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1
1
1
1
1
2
1
1
1
1
1
1
1
1
DNW-A75/A75P