![background image](http://html.mh-extra.com/html/sony/hcd-w55/hcd-w55_service-manual_1329760006.webp)
– 6 –
SECTION 3
ADJUSTMENTS
r
Torque Measurement
Mode
Torque Meter
Meter Reading
Forward
CQ-102C
36 to 61 g•cm
(0.50 – 0.84 oz•inch)
Forward
CQ-102C
2 to 6 g•cm
Back Tension
(0.028– 0.083 oz•inch)
Reverse
CQ-102RC
36 to 61 g•cm
(0.50 – 0.84 oz•inch)
Reverse
CQ-102RC
2 to 6 g•cm
Back Tension
(0.028 – 0.083 oz•inch)
FF, REW
CQ-201B
61 to 143 g•cm
(0.85– 1.99 oz•inch)
r
Tape Tension Measurement
Mode
Tension Meter
Meter Reading
Forward
CQ-403A
more than 100g (3.53 oz)
Reverse
CQ-403R
more than 100g (3.53 oz)
3-1. MECHANICAL ADJUSTMENTS
PRECAUTION
1. Clean the following parts with a denatured-alcohol-moistened
swab :
record/playback head pinch roller
erase head
rubber belts
capstan
idlers
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.
3-2. ELECTRICAL ADJUSTMENTS
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.
r
Switch position
DOLBY NR switch
: OFF
FUNCTION button
: OFF
EFECT switch
: OFF
DBFB switch
: OFF
3. Deck section electrical adjustments are made in test mode by
pressing CD STOP, DECK A STOP, and DECK B STOP at the
same time.
4. Input point and output level measurement point.
Tape
Contents
Use
P-4-A100
10 kHz, –10dB
Head Azimuth Adjustment
P-4-L300
315Hz, 0dB
Level Adjustment
WS-48B
3kHz, 0dB
Tape Speed Adjustment
r
Tast tape
Record/Playback Head Azimuth Adjustment
DECK A DECK B
Procedure :
1. Forward Playback mode
Reverse Playback mode
Output level
measurement
point
Input point
R-CH
L-CH
Output level
measurement
point
SYSTEM
CONTROL 1
CN151
12
14
11
10
REC (R)
REC (L)
PB (R)
PB (L)
AF OSC
attenuator
MAIN BOARD
0 dB=0.775V
test tape
P-4-A100
(10kHz, –10dB)
set
VTVM
+
–
Output level measurement point