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HCD-EP505 SECTION 4 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. (Do not bring the head magnetizer close to the erase head.) 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 FWD FWD Back Tension FF Torque Meter CQ-102C Meter Reading 2.95 � 6.86 mN�m (30 � 70 g�cm) (0.42 � 0.97 oz�inch) 0.15 � 5.39 mN�m (1.5 � 5.5 g�cm) (0.021 � 0.076 oz�inch) more than 5.89 mN�m (more than 60 g�cm) (more than 0.83 oz�inch) REW CQ-201B more than 5.89 mN�m (more than 60 g�cm) (more than 0.83 oz�inch)
SECTION 5 ELECTRICAL ADJUSTMENTS
PRECAUTION
1. Setting MEGA BASS switch : OFF
TAPE DECK SECTION
Test tape
Type WS-48B Signal 3 kHz, 0 dB
0 dB=0.775 V
Used for Tape Speed Adjustment
Tape Speed Adjustment Setting: Function: TAPE
test tape WS-48B (3 kHz, 0 dB) 47 k� set + � MAIN board SPEAKER terminal (CN503)
frequency counter
CQ-102C
CQ-201B
Procedure: 1. Playback WS-48B (tape center) in the FWD state. 2. Adjsut the volume in CAPSTAN/REEL motor so that the frequency counter reading becomes 3,000 Hz. Specified Value: 2,910 to 3,090 Hz 3. Confirm that the frequency at the beginning and that at the end of tape winding are between 2,955 to 3,045 Hz. Adjustment Location:
� Tape Tension Measurement
Mode FWD Tension Meter CQ-403A Meter Reading more than 100 g (more than 3.53 oz)
CAPSTAN/REEL motor
Tape Speed Adjustment
Sample Value of Wow and Flutter: 0.3% or less W. RMS (JIS) (WS-48B)
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