MAINTENANCE/INSPECTION PROCEDURE
4-20
2. Required Maintenance
The recording density of a VCR(VCP) is much higher than
that of an audio tape recorder. VCR(VCP) components must
be very precise, at tolerances of 1/1000mm, to ensure com-
patibility with the other VCRs. If any of these components are
worn or dirty, the symptoms will be the same as if the part is
defective. To ensure a good picture, periodic inspection and
maintenance, including replacement of worn out parts and
lubrication, is necessary.
3. Scheduled Maintenance
Schedules for maintenance and inspection are not fixed
because they vary greatly according to the way in which the
customer uses the VCR(VCP), and the environment in which
the VCR(VCP) is used.
But, in general home use, a good picture will be maintained
if inspection and maintenance is made every 1,000 hours.
The table below shows the relation between time used and
inspection period.
Table 1
4. Supplies Required for Inspection and
Maintence
(1) Grease : Kanto G-311G (Blue) or equivalent
(2) Isopropyl Alcohol or equivalent
(3) Cleaning Patches
(4) Grease : Kanto G-381(Yellow)
5. Maintenance Procedure
5-1) Cleaning
(1) Cleaning video head
First use a cleaning tape. If the dirt on the head is too
stubborn to remove by tape, use the cleaning patch. Coat
the cleaning patch with Isopropyl Alcohol. Touch the
cleaning patch to the head tip and gently turn the
head(rotating cylinder) right and left.
(Do not move the cleaning patch vertically. Make sure
that only the buckskin on the cleaning patch comes into
contact with the head. Otherwise, the head may be dam-
aged.)
Thoroughly dry the head. Then run the test tape. If lso-
propyl Alcohol remains on the video head, the tape may
be damaged when it comes into contact with the head
surface.
(2) Clean the tape transport system and drive system, etc, by
wiping with a cleaning patch wetted with Isopropyl
Alcohol.
NOTES:
1
It is the tape transport system which comes into contact
with the running tape. The drive system consists of those
parts which moves the tape.
2
Make sure that during cleaning you do not touch the tape
transport system with excessive force that would cause
deformation or damage to the system.
About 1
year
One hour
Two hours
Three hours
When
inspection is
necessary
Average
hours used
per day
About 18
months
About 3
years
Fig. C-9-4
Drum
(Rotating Cylinder)
Head Tip
Coat With Isopropyl Alcohol
Touch this section of cleaning
patch to the head tip and gently
turn the Drum (Rotating Cylinder)
Cleaning Patch
Summary of Contents for XBS344 Series
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Page 10: ...2 3 951 954 960 961 953 957 959 955 956 963 A90 2 Woofer Speaker Section DTE 5105WE...
Page 11: ...2 4 850 852 851A 851 853 854 857 858 A80 3 Speaker Section DTE 550TE...
Page 38: ...3 34 3 35 2 POWER SMPS CIRCUIT DIAGRAM 2 SR13601A R171 4 7K...
Page 39: ...3 36 3 37 3 JACK TUNER CIRCUIT DIAGRAM 03 08 15 SR13605A...
Page 43: ...3 44 3 45 7 KEY CIRCUIT DIAGRAM SR13610A...
Page 46: ...3 50 3 51 PRINTED CIRCUIT DIAGRAMS 1 MAIN P C BOARD LOCATION GUIDE...
Page 47: ...3 52 3 53 2 TUNER P C BOARD LOCATION GUIDE 3 POWER P C BOARD...
Page 48: ...3 54 3 55 4 KEY 1 LEFT P C BOARD LOCATION GUIDE 5 KEY 2 RIGHT P C BOARD LOCATION GUIDE...
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Page 79: ...CD DVD LD will not on SR13608A VZ DV51V SANYO 3 85 3 86 2 RF SERVO CIRCUIT DIAGRAM...
Page 80: ...VZ DV51V SANYO TUNER_L TUNER_R 3 87 3 88 3 AUDIO _COM CIRCUIT DIAGRAM DVD AMP...
Page 81: ...VZ DV51V SANYO FRONT_R FRONT_L REAR_R REAR_L 3 89 3 90 4 DIGITAL AMP CIRCUIT DIAGRAM DVD AMP...
Page 82: ...5 PWM CODEIC CIRCUIT DIAGRAM DVD AMP VZ DV51V SANYO 12 288MHz R R L L R L OPTICAL_IN 3 91 3 92...
Page 83: ...6 INTERFACE CIRCUIT DIAGRAM DVD AMP VZ DV51V SANYO 3 93 3 94...
Page 86: ...LOCATION GUIDE LOCATION GUIDE 3 99 3 100 PRINTED CIRCUIT DIAGRAMS 1 DVD AMP P C BOARD...
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