5
WM-FS555/FS556
3-2. ELECTRICAL ADJUSTMENTS
PRECAUTION
• Supplied voltage : 1.5 V.
• Switch and control position (MENU display)
MEGA BASS : OFF
VOLUME control (RV301) : maximum
AVLS : OFF (No indicated)
FM MODE : US : DX (No indicated)
Canadian, AEP, E : STEREO (No indicated)
TAPE SECTION
Test Tape
Type Signal Used for
WS-48A 3kHz, 0dB Tape Speed Adjustment
Tape Speed Adjustment
Procedure :
1. Playback WS-48A (tape center part) in the FWD state and ad-
just RV601 so that the frequency counter reading becomes
3,000Hz.
Standard value : 2,985–3,015Hz
2. Playback WS-48A (tape center part) in the REV state.
Check that frequency counter reading is within ±1.0% of the
reading of step 1.
Adjustment Location :
3-1. MECHANICAL ADJUSTMENTS
PRECAUTION
1. Clean the following parts with a denatured-alcohol-moistened
swab :
playback head pinch roller
capstan rubber belt
2. Demagnetize the playback head with a head demagnetizer.
Do not use a magnetized screwdriver for the adjustments.
3. These measurement and adjustment should be performed with
the rated power supply voltage (1.5 V) unless otherwise noted.
Torque Measurement
Mode Torque meter Meter reading
FWD
1.97 – 4.11 mN • m
20 – 42 g • cm
(0.28 – 0.58 oz• inch)
FWD
CQ-102C
less than 0.19 mN • m
less than 2 g • cm
back tension
(less than 0.027 oz• inch)
1.97 – 4.11 mN • m
REV 20 – 42 g • cm
(0.28 – 0.58 oz• inch)
REV
CQ-102RC
less than 0.19 mN • m
less than 2 g • cm
back tension
(less than 0.027 oz• inch)
FF, REW CQ-201B
more than 3.93 mN • m
more than 40 g • cm
(more than 0.56 oz• inch)
SECTION 3
ADJUSTMENTS
0 dB = 0.775V
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