Sony HCD-H170 - Tape Speed and Playback Level Adjustment

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
pesten L-CH R-CH Pe SCO
peak peak angle
3. Playback Mode
test tape
P-4-A100
(10kHz, —10dB) :
oscilloscope
L-CH
TP201
Screen pattern
ane
OQOOO@PY
in phase 45° 135° 180°
ed
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 :
e@ Perform high speed adjustment before normal speed adjust-
ment.
Mode: playback
test tape
WS-48B
(3kHz, OdB) frequencny counter
counter
RV72A
* High 5,970 to 6.030Hz
B | RV72B |
A era
Normal 2,985 to 3,015Hz
B | RV71B
x Continue to press HIGH SPEED DUBBING switch (S1523)
in playback mode: High speed playback.
Frequency difference between the begining and the endof the tape
should be within +1.5%.
Adjustment Location: MD- A and MD-B boards.
Playback Level Adjustment
Procedure :
Mode: playback
test tape
P-4-L300
(315Hz, 0dB) VTVM
TP201
Deck A is RV11A (L-CH) and RV21A (R-CH), deck B is
RV11B (L-CH) and RV21B (R-CH) so that adjustmm t within
adjustment level as follows.
Adjusment Level :
LINE OUT level: —8.2dB to —7.2dB (0.301 to (.338V)
Level Difference between Channels: within 1dB
Confirm the DOLBY OUT level does not change in playback
mode while changing the mode from playback to sio p several
times.
Adjustment Location: MD-A and MD-B boards
290s