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TCM-500DV SECTION 4 MECHANICAL ADJUSTMENTS
1. Clean the following parts with a denatured-alcohol-moistened swab: record/playback/erase head pinch roller capstan rubber belt 2. Demagnetize the record/playback/erase head with a head demag netizer. 3. Do not use a magnetized screwdriver for the adjustments. 4. The adjustments should be performed with the rated power supply voltage (3 V) unless otherwise noted. Torque Measurement
Mode FWD CQ-102C FWD Back Tension REV REV Back Tension FF, REW CQ-201B more than 4.91 mN�m (more than 50 g�cm) (more than 0.69 oz�inch) 0.05 � 0.49 mN�m (0.5� 5 g�cm) (0.007 � 0.069 oz�inch) input level output level Mic earphone �60dBs 16�, �20dBs Torque Meter Meter Reading 1.97 � 3.92mN�m (20 � 40 g�cm) (0.28 � 0.55 oz�inch)
SECTION 5 ELECTRICAL ADJUSTMENTS
Setting: � Supplied voltage: 3 V (DC) � Switch and control position VOL contorl (RV101) : mechanical center REC SPEED switch (S401) : normal (4.8cm/s) PAUSE switch (S601) : OFF SPEED CONTROL (RV201) : center click VOR switch (S402) Regulation Level : OFF Tape Speed Adjustment Mode: playback
test tape WS-48A (3 kHz, 0 dB) 16 � set
+ �
Ver 1.2
frequency counter
EAR jack (J102)
Procedure: 1. Set [REC TIME] switch (S401) to NORMAL (4.8 cm/s) position, and playback the tape (WS-48A) . 2. Adjust RV602 so that frequency counter reading becomes 3,010 Hz. 3. Set [REC TIME] switch (S401) to DOUBLE (2.4 cm/s) position. 4.Playback the tape from the beginning for two minutes, then adjust RV601 so that frequency counter reading becomes 1,505 Hz.
Test Tape
Type WS-48A Signal 3 kHz, 0 dB Used for tape speed adjustment
Tape Tension Measurement
Mode FWD Tension Meter CQ-403A Meter Reading more than 50 g (more than 1.76 oz)
0 dB=0.775 V Confirm that deflection of the frequency counter reading between the beginning and the end of tape is within 2% (NORMAL: approx. 60 Hz, DOUBLE: approx. 30 Hz) .
Adjustment Location: � MAIN BOARD (Conductor Side) �
RV601 Tape Speed Adjustment (Double Speed)
RV602 Tape Speed Adjustment (Normal Speed) 20 11
IC601
1 10
7
7
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