Sony HCD-H77 - Page 24

HCD-H66/H70/H77/H1200/H1400 |
2. Turn the adjustment screw for the maximum output
levels. If these levels do not match, turn the adjustment
screw until both of output levels match together within
1dB.
L-CH
peak
within 1dB
R-CH
peak
screw
position LCH ae = screw
peak peak angle
3. Playback Mode
test tape
P-4-A100
(10kHz, —10dB) F
oscilloscope
L-CH
DOLBY OUT TP701
Screen pattern
in phase 45° 135° 180°
—$—$< $$ —$—$
good wrong
4. Change the review playback mode and repeat the steps 1
to 3.
5. After the adjustment, lock the adjustment screw with
suitable locking compound.
Adjustment Location :
—record/playback head (deck A and B)
forward side reverse side
Adjustment screws
forward
reverse
Tape Speed Adjustment
Procedure:
© Perform high speed adjustment before normal speed adjust-
ment.
Mode: playback
test tape
WS-48A
(3kHz, 0dB)
frequencny counter
5,960 to 6,040Hz
2,980 to 3,020Hz
* Continue to press HIGH SPEED DUBBING switch (S312)
in playback mode: High speed playback.
Frequency difference between the begining and the end of the tape
should be within +1.5%.
Adjustment Location: motors (M1 (deck A), M2 (deck B))
Playback
Level
Adjustment
Procedure :
Mode: playback
test tape
P-4-L300
(315Hz, OdB) VTVM
DOLBY OUT TP7(1
Deck A is RV41A (L-CH) and RV61A (R-CH), deck B is
RV41B (L-CH) and RV61B (R-CH) so that adjustment within
adjustment level as follows.
Adjustment Level :
LINE OUT level: —6+0.5dB (0.37 to 0.41V)
Level Difference between Channels: within 11B
Confirm the DOLBY OUT level does not charge in playback
mode while changing the mode from playbackto stop several
times.
Adjustment Location: MD-A and MD-B boards
|
|