3.3 MECHANISM ADJUSTMENT
3.3.1 Tape pattern check
(1) Play back the compatibility adjustment tape.
CN105
(2) While triggering the MAIN CN105-10PIN (HID1), observe
the waveform of CN105-26PIN (ENV_OUT).(ENV_OUT)
(3) Confirm that the waveform is free from remarkable level-
down, and entirely parallel and straight.
(4) In case any level-down is observed on the left hand side,CN105
straighten the level by turning the guide roller of the pole(HID1)
base assembly (supply).
In case any level-down is observed on the right hand side,
however, straighten the level by turning the guide roller ofFig.3-3-1
the pole base assembly (Take-up).
(5) After adjustment, try the unloading motion once, and con-
firm that the waveform is flat (straight) when the tape has
been played back again.
Moreover, perform readjustment as required.
(6) When the recording has been played back again, play back
the self-recording to confirm that the waveform is flat.Flatten the waveform.
Note:
When an adjustment is performed with the lower caseMisalignment of guide Misalignment of guide roller
cover attached, first slide the two covers (cassette androller height on the height on the take-up side
cassette rear) open and then perform the compatibilitysupply side
adjustment.
Be sure not to damage the covers when sliding themFig.3-3-2
open to make an adjustment because they must be re-
positioned after completing the adjustment.
NOTE:
The cover serve as the cover for the
service adjustment access hole.
GUIDE ROLLER
GUIDE ROLLER (TU) ASSY(SUP) ASSY
COVER
(Cassette
rear)
JIG CONNECTOR CABLE
MAIN CN105 JIG CONN. BOARD
26PIN (ENV_OUT)JIG CONN-26PIN (ENV_OUT)
10PIN (HID1)JIG CONN-10PIN (HID1)
Fig.3-3-3
1-20 (No.86722) |
ACEC
JVC
