Panasonic AJ-YA120AG, Service Manual

Page: 403 / 647

MECH-13
1-20. CTL Self-REC/PLAY Output
Level Confirmation
TP
TP4: A PROC Board (Slot 2)
MODE
PLAY
REV x 1
REV x 0.2
TAPE
Blank M Cassette Tape
M. EQ
Oscilloscope
SPEC.
See below
(Specification)
CTL Output Level: C1, C2
PLAY REV x -1 REV x -0.2
C1,C2
≥
1.8V C1,C2
≥
1.4V C1,C2
≥
1.2V
1. Confirm all screws of the A/C Head are fixed.
2. Record and play back any signal. Confirm that the
CTL output level on each mode is within the
specification.
3. In case PLAY mode is out of specification, confirm
the A/C Head Height again. (Refer to Paragraph
“1-16. A/C Head Height Confirmation”.)
4. In case REV x-1 mode is out of specification,
confirm the T6 Post Height again. (Refer to
Paragraph “1-18. REV Tape Path Confirmation and
Adjustment”.)
Figure 1-20-1
1-21. PLAY Tape Path Limit
Confirmation
MODE
PLAY
TAPE
VFM3580KM or VFM3580KL
SPEC.
See below
1. Play Back the tape and confirm the post limits by
eyes.
Tape Limit (see figure)
Post Name
A B C D E F
S4 Post NG OK OK NG NG NG
S3 Post NG NG OK NG NG NG
S2 Post OK NG NG NG NG NG
T2 Post OK NG NG NG NG NG
T5 Post NG NG OK NG NG NG
T6 Post OK OK OK NG NG NG
Figure 1-21-1
2. If any is out of specification, confirm an
appropriate adjustment point.
Post Name Adjust Procedure
S4 Post
S3 Post S3, S4 Post Post Height
Pre-Adjustment
S2 Post
T2 Post S2, T2 Post Envelope Waveform
Adjustment
T5 Post T5 Post
T6 Post T6 Post
Post Height
Pre-Adjustment
Note :
See page MECH-1 for post location.
A: UPPER B: FREE C: LOWER
D: CURL E: BEND F: DROP