SECTION 3 ADJUSTMENTS
3-2. ELECTRICAL ADJUSTMENTS
� Standard Level
Input signal level Output signal level MIC EAR (EARPHONE) � 60dBs 1.6k�, �22,4dBs
3-1. MECHANICAL ADJUSTMENTS
PRECAUTION 1. Clean the following parts with a denatured alcohol-moistened swab : record/playback/erase head pinch roller rubber belts capstan 2. Demagnetize the record/playback head with a head demagnetizer. (Do not bring the head demagnetizer 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. 6. Power supply voltage : 3V DC. Torque Measurement
Mode Forward /Reverse Torque Meter CQ-102C Meter Reading 1.97 to 3.92 mN � m (20 to 40 g � cm) (0.28 to 0.55 oz� inch) 0.05 to 0.49 mN � m (0.5 to 5.0 g � cm) (0.007 to 0.07 oz� inch) more than 4.90 mN � m (50 g � cm) (0.7 oz� inch)
� Test Tape
Type WS-48A Signal 3kHz, 0dB Used for tape speed adjustment
0dB=0.775V Setting : VOL Control (RV301) : mechanical mid REC TIME (S903) : normal(4.8cm/s) SPEED CONTROL (RV901): normal (center click) DPC(MANUAL) Adjustment Note: Adjust before the tape speed adjustment Setting : DPC(S904) switch : MANUAL Tape speed Mode Procedure : [MAIN BOARD](SIDE B)
C407 C413 C412 8 R401 L401 C402 C403
: 4.8cm/s : PLAY
Forward Fast Forward and Rewind
CQ-102C
CQ-201B
TP82 TP47 TP51
R404 R403 C410
Tape Tension Measurement
Mode Forward Tension Meter CQ-403A Meter Reading more than 50g ( 1.77oz)
304
RV401
C415
R407 24 C401 TP63 25 20
R406 R402 15 13 12 10 5
C414
frequency counter TP47
+ �
R405 C416 R416 R417 C422 C420
IC401
30 35 45 48
36
1
TP46 37 40 R409
TP8(GND)
1. Connect the freguency counter to TP47 and TP8(GND). 2. Adjust RV401 so that the freguency at TP47 becomes 220 Hz. Standard value : 117 to 223 Hz Adjustment Location : Main board (See page 7)
