Sony MHC-D7 - Page 12

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
R-CH
eak
Screw P
position
— screw angle
L-CH R-CH
peak peak
3. Playback Mode
test tape
P-4-A100
(10kHz, ~ 10dB)
L-CH
Oscilloscope
Output level measurement point
(see page 9)
screen pattern
inphase 45° )
good
4. Change the review playback mode and repeat the steps | to 3.
5. After the adjustment, lock the adjustment screw with suitable
locking compound.
Adjustment Location :
— record/playback head (Deck A and B) —
Forward Reverse
Side Side
| ane ene
Adjustment Screws
Tape Speed Adjustment
Procedure :
@ Perform high speed adjustment before normal speed adjust-
ment.
Mode : Playback
test tape
WS-48B
(3kHz, 0dB)
frequency counter
Output level measurement point
(see page 9)
Frequency counter
5,970 to 6,030Hz
* High
a
PB Rv6s1 |
Normal 2,940 to 3,090Hz
* Continue to press HIGH SPEED DUBBING switch (S545) in
playback mode : High speed playback.
Frequency difference between the begining and the end of the
tape should be within + 3%.
Frequency difference between deck A and deck B the biginning
of the tape should be within 1.5%.
Adjustment Location : AUDIO board.
(see page 11)
Playback Level Adjustment
Procedure :
~ FWD Playback Mode —
test tape
P-4-L300 VTVM
(315Hz, OdB)
Output level measurement point
(see page 9)
Deck A is RV311(L-CH) and RV411(R-CH), deck B is RV301
(L-CH) and RV401 (R-CH) so that adjustment within adjustment
level as follows.
Adjustment Level :
LINE OUT level : — 7.5 + 0.5dB (0.31 to 0.35V)
Level Difference between Channels : within 0.5dB
Confirm the OUTPUT level does not change in play back mode
while changing the mode from playback to stop several times.
Adjustment Location : AUDIO board.
(see page 11)