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Verfügbare Sprachen
Verfügbare Sprachen
VC.M26HWLM
vc-MH67HM/LM
VC-M27HM
VC-MH68HM
vc-M271LM
4. ADJUSTMENT,REPLACEMENTAND ASSEMBLYOF MECHANICALUNITS
Forothertechnical i temsthandescribed inthisServece Manual, r eferto theVC-M27GM Service Manual.
MECHANICAL PARTS REQUIRING PERIODICAL INSPECTION
Usethefollowing tableasaguide tomaintain t hemechanical partsingoodoperating condition.
Maintained
Parts
AHC (Automatic Head Cleaner)
(except VC-M26SM/M261SM)
NOTE:
O : Part replacement.
a: Cleaning ( Forcleaning, usea lint-free cloth dampened withpureisopropyl alcohol).
A : Oilrefilling ( The indicated point s hould b elubricated withhigh quality s pindle o ilevery 1000hrs).
Ifthe reading is outofthespecified value,cleanor replace thepart.
CHECKING
AND ADJUSTMENT
UP TORQUE
IN PLAYBACK
1. Removethe cassettehousingcontrolassembly.
2. Make a short-circuit between TP5005 and TP5006,
both located at the center on your side on the main
PWB. Now turn on the power.
3. Open the lid of the cassette torque meter, and hold it
with two pieces of vinyl tapes.
4. Load the cassette torque meter into the unit.
5. Put the weight (500g) on the cassette torque meter.
6. Press the REC button to put the unit in REC mode.
Set value LP 9.6 ± 4.7mN.m (98± 48gf.cm)
SP only model 10.5 ± 3.8mN.m(107± 39gf.cm)
500 1000 1500 2000
hrs.
hrs.
hrs.
o
OF TAKE-
MODE
Figure 4-1.
Possible symptom encountered
hrs.
o
• Checking
Checkthatthe torqueis inthe rangeof 9.6± 4.7mN•m
1
(98 ± 48gf•cm) in the LP record mode.
2. The torque fluctuates due to the rotational deviation of
the limiter pulley ass'y. Use the center of the fluctuation
as the value.
3.
Place the ass'y in the LP record mode, and check that
the take-up torque is within the range.
Adjustment
If the take-up torque in the playback mode is outside the
range, replace the limiter pulley ass'y.
Note:
Stabilize thecassette torque meter to prevent floating.
8
Remarks
Replace the roller of the
cleaner
when
it wears
down.
Just change the AHC roller
assembly
for new one.
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