Mechanical Adjustments - Sony HCD-HP7 Service Manual

[AMP Test Mode]
Procedure:
1 Press the ?/1 button to turn the set on.
2. To enter the test mode, press the three buttons x ,
PRESET EQ and DISC 4 simultaneously.
3. The message "AMP TEST IN" is displayed.
Press the x and PRESET EQ buttons simultaneously. The
4.
VACS status and IC parameters are displayed. Example : "D:
S: +4. 0. +2"
5. DBFB ON/OFF Function : Press the GROOVE button, "DBFB
ON" or "DBFB OFF" is displayed.
6. SURROUND ON/OFF Function : Press the PRESET EQ
button, "SURROUND ON" or "SURROUND OFF" is
displayed.
To exit from this mode, press three buttons x , PRESET EQ
7.
and DISC 4 simultaneously.
Note: Perform the Cold Reset to initialize the equalizer parameters.
[CD Service Mode]
* This mode can run the CD sled motor freely. Use this mode, for
instance, when cleaning the pickup.
Procedure:
Press ?/1 button to turn the set on.
1.
2. Set the function to CD.
3. Press three buttons DISPLAY , x and DISC 5
simultaneously.
4. The CD service mode is selected.
5. Press > button to move the pickup to outside track, or
press . button to inside track.
6. To exit from this mode, perform as follows:
1) Move the pickup to the most inside track.
2) Perform the Cold Reset.
Note: Do not run the sled motor excessively, otherwise the gear can
be chipped.
SECTION 6

MECHANICAL ADJUSTMENTS

• TAPE MECHANISM DECK SECTION
Precaution
1. Clean the following parts with a denatured alcohol-moistened
swab:
record/playback heads
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
FWD CQ-102C
FWD
CQ-102C
back tension
REV CQ-102RC
REV
CQ-102RC
back tension
FF/REV CQ-201B
FWD tension CQ-403A
REV tension CQ-403R
HCD-HP7
pinch rollers
rubber belts
idlers
Meter reading
2.94 – 7.84 mN • m
(30 to 79 g • cm)
(0.42 – 1.11 oz • inch)
0.15 – 0.6 mN • m
2 to 6 g • cm
(0.03 – 0.08 oz • inch)
2.94 – 7.84 mN • m
(30 to 79 g • cm)
(0.42 – 1.11 oz • inch)
0.15 – 0.6 mN • m
2 to 6 g • cm
(0.03 – 0.08 oz • inch)
6.86 – 17.64 mN • m
(70 to 179 g • cm)
(0.98 – 2.49 oz • inch)
9.8 mN • m more
(100 • cm or more)
(1.4 oz • inch or more)
9.8 mN • m more
(100 • cm or more)
(1.4 oz • inch or more)
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