Adjustments; Mechanical Adjustment; Electrical Adjustment - Sony HCD-V5500 Service Manual

5-1.

MECHANICAL ADJUSTMENT

PRECAUTION
1. Clean the following parts with a denatured-alcohol-moistened
swab:
record/playback head
erase head
capstan
2. Demagnetize the record/playback head with a head
demagnetizer.
3. Do not use a magnetized screwdriver for the adjustments.
4. After the adjustments, apply suitable locking compound to the
parts adjusted.
5. The adjustments should be performed with the rated power
supply voltage unless otherwise noted.
• Torque Measurement
Mode Torque Meter
Forward CQ-102C
Forward
CQ-102C
Back Tension
Reverse CQ-102RC
Reverse
CQ-102RC
Back Tension
FF, REW CQ-201B
• Tape Tension Measurement
Mode Tension Meter
Forward CQ-403A
Reverse CQ-403R
SECTION 5

ADJUSTMENTS

pinch roller
rubber belts
idlers
Meter Reading
36 to 61g•cm
(0.50 – 0.84 oz•inch)
2 to 6g•cm
(0.028 – 0.083 oz•inch)
36 to 61g•cm
(0.50 – 0.84 oz•inch)
2 to 6g•cm
(0.028 – 0.083 oz•inch)
61 to 143g•cm
(0.85 – 1.99 oz•inch)
Meter Reading
more than 100 g (3.53 oz)
more than 100 g (3.53 oz)
— 8 —
5-2.

ELECTRICAL ADJUSTMENT

DECK SECTION
1. The adjustment should be performed in the publication.
(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
DOLBY NR switch : OFF
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.
4. Input point and output level measurement point.
• Test Tape
Tape Signal
P-4-A100 10 kHz, –10 dB
P-4-L300 315 Hz, 0dB
WS-48B 3 kHz, 0dB
0 dB=0.775V
Record/Playback Head Azimuth Adjustment
DECK A DECK B
Procedure:
1. Forward Playback mode
Reverse Playback mode
Used for
Head Azimuth Adjustment
Level Adjustment
Tape Speed Adjustment