Read Sony HCD-V5500 / MHC-V5500 / MHC-V7700AV Service Manual online
— 8 —
SECTION 5
ADJUSTMENTS
5-1.
MECHANICAL ADJUSTMENT
PRECAUTION
1.
Clean the following parts with a denatured-alcohol-moistened
swab:
swab:
record/playback head
pinch roller
erase head
rubber belts
capstan
idlers
2.
Demagnetize the record/playback head with a head
demagnetizer.
demagnetizer.
3.
Do not use a magnetized screwdriver for the adjustments.
4.
After the adjustments, apply suitable locking compound to the
parts adjusted.
parts adjusted.
5.
The adjustments should be performed with the rated power
supply voltage unless otherwise noted.
supply voltage unless otherwise noted.
• Torque Measurement
• Tape Tension Measurement
5-2.
ELECTRICAL ADJUSTMENT
1.
The adjustment should be performed in the publication.
(Be sure to make playback adjustment at first.)
(Be sure to make playback adjustment at first.)
2.
The adjustment and measurement should be performed for both
L-CH and R-CH.
• Switch position
L-CH and R-CH.
• Switch position
DOLBY NR switch : OFF
FUNCTION button : OFF
EFFECT switch
FUNCTION button : OFF
EFFECT switch
: OFF
DBFB switch
: OFF
3.
Deck section electrical adjustments are made in test mode by
press key switch same time CD STOP DECK A STOP and
DECK B STOP button.
press key switch same time CD STOP DECK A STOP and
DECK B STOP button.
4.
Input point and output level measurement point.
•
Test Tape
0 dB=0.775V
Record/Playback Head Azimuth Adjustment
DECK A
DECK B
Procedure:
1.
1.
Forward Playback mode
Reverse Playback mode
Reverse Playback mode
Mode
Torque Meter
Meter Reading
Forward
CQ-102C
36 to 61g•cm
(0.50 – 0.84 oz•inch)
Forward
CQ-102C
2 to 6g•cm
Back Tension
(0.028 – 0.083 oz•inch)
Reverse
CQ-102RC
36 to 61g•cm
(0.50 – 0.84 oz•inch)
Reverse
CQ-102RC
2 to 6g•cm
Back Tension
(0.028 – 0.083 oz•inch)
FF, REW
CQ-201B
61 to 143g•cm
(0.85 – 1.99 oz•inch)
Mode
Tension Meter
Meter Reading
Forward
CQ-403A
more than 100 g (3.53 oz)
Reverse
CQ-403R
more than 100 g (3.53 oz)
DECK SECTION
Tape
Signal
Used for
P-4-A100
10 kHz, –10 dB
Head Azimuth Adjustment
P-4-L300
315 Hz, 0dB
Level Adjustment
WS-48B
3 kHz, 0dB
Tape Speed Adjustment
Click on the first or last page to see other HCD-V5500 / MHC-V5500 / MHC-V7700AV service manuals if exist.