Confirmation Of Play Start Envelope - Panasonic AJ-D440 Service Manual

1. Confirm that the Envelope waveform becomes in
the specification on REV, REW and FF mode as
refer to figure and below.
⋅ Waveform must be Diamond Style.
⋅ All the peak level must be more than 90% of
maximum level.
V/Vmax ≥ 0.9
2. If out of spec, adjust S4 post height. (refer to item
"Post Height Pre-Adjustment")
NOTE 1 :
The model of except AJ-D950, AJ-D950A, AJ-D92,
AJ-D95DC and AJ-D94 in TYPE B model on Table 3-
23, which models should be connect to BER
COUNTER (refer to item "Envelope Waveform
Adjustment").
NOTE 2 :
In case of AJ-D940, setting on Service Menu
required.
(refer to item 3-11.)

3-24. Confirmation of Play Start Envelope

SPEC Envelope Waveform signal should be rising up immediately on PLAY mode.
TEST Refer to Table 3-23 on previous item "3-23. Confirmation of Envelope on REV/REW and FF
POINT mode".
REW/REV → PLAY, Loading completion → PLAY, FF → PLAY
MODE
• L Cassette (123min, Recorded tape) Tape beginning portion
TAPE
[ for models AJ-D200, AJ-D210, AJ-D215, AJ-D940 ]
‚ M Cassette (63min, Recorded tape) Tape beginning portion
[ for except above models ]
M.EQ Oscilloscope
This adjustment must be done after Envelope
Waveform Adjustment.
1. Confirm that the envelope appears immediately,
when the mode is changed from REW to PLAY,
REV to PLAY, FF to PLAY, and Lording to PLAY
mode.
2. If out of spec, adjust S4 post height. (refer to item
"Post Height Pre-Adjustment")
NOTE :
In case of AJ-D940, setting on Service Menu
required.
(refer to item 3-11.)
2-35
Figure 3-23