Sony HCD-H501 - Adjustments; Mechanical and Electrical Deck Adjustments

SECTION 4
ADJUSTMENTS
4-1, 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
4-2, 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.
© Switch position
DOLBY NR switch : OFF
FUNCTION button : CD
3. Deck section electrical adjustments are made in test mode by
pressing TUNER/BAND, DISPLAY, and POPS at the same
time.
4. Input point and output level measurement point.
power supply voltage unless otherwise noted. Output level
measurement Input point
point
@ Torque Measurement 36.7mV ( ~ 25.648) AF OSC
- a are
Mode | Torque Meter Meter Reading lene ste
30 to 70gcm measurement
Forward ora (0.42 = 0.97 ozsinch) point wee peed ooclt.
R-CH
Forward 1.5 to 5.5geom
Back Tension] CQ-102C (0.021 — 0.076 ozsinch)
aes onaoe 9 1
more than 63gscm
FF, REW cO-2018 ‘oes earehy
MAIN BOARD
1 3
CNéoT
© Test Tape
Tape Contents Use
P-4-A100 10kHz, ~ 10dB Head Azimuth Adjustment
P-4-L300 315Hz, 0dB Level Adjustment
WS-48B 3kHz, Od Tape Speed Adjustment
0 dB=0.775V
DECK A
Procedure :
1. Forward Playback mode
Reverse Playback mode
test tape
P-d-A100
(fokHz, ~ 1008)
RS
Record/Playback Head Azimuth Adjustment
DECD B
‘Output level measurement point