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PDF Contains
Technical Data, Mechanical data, Detailed Circuit diagram with components value, PCB layout. Actual PCBs Print. Component List, Spare parts code list and Input output detail. It cover LBB1211, LBB1212, LBB1213, LBB1216, LBB1217.
It is the actual Service Manual for SQ10
SECTION 4 MECHANICAL ADJUSTMENT
Precaution 1. Clean the following parts with a denatured alcohol-moistened swab: record/playback heads pinch rollers erase head rubber belts capstan idlers 2. Do not use a magnetized screwdriver for the adjustments. 3. After the adjustments, apply suitable locking compound to the parts adjusted. 4. The adjustments should be performed with the rated power supply voltage unless otherwise noted. � Torque Measurement
Mode Torque meter Meter reading
SECTION 5 ELECTRICAL ADJUSTMENT
Precaution 1. Perform adjusting on the test mode. 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 adjust. 5. The adjustments should be performed with the rated power supply voltage unless otherwise noted. 6. The adjustments should be performed in the order given in this service manual. (As a general rule, playback circuit adjustment should be completed before performing recording circuit adjustment.) 7. The adjustments should be performed for both L-CH and RCH. 8. Switches should be set as follows. DOLBY NR ..................................................................... OFF DIRECTION .................................................................... A � Standard Recording Position Adjust the REC LEVEL (VR02) control so that the standard input/ output signal level is obtained in the following connection. � Record Mode �
FWD FWD back tension REV REV back tension FF/REW � Tape Tension FWD tension REV tension CQ-403A CQ-403R CQ-102C
31 to 61 g � cm 2 to 6 g � cm 36 to 61 g � cm CQ-102RC CQ-201B 2 to 6 g � cm 61 to 143 g � cm
100 g or more 100 g or more
audio oscillator level meter attenuator 10k � set 600 � LINE IN 47k �
LINE OUT
Standard Input Level Input terminal source impedance input signal level Standard Output Level Output terminal load impedance output signal level 0dB = 0.775 V
LINE IN 10k� 0.5V (�3.8dB)
LINE OUT 47kW 0.5V (�3.8dB)
Test Mode Turn OFF the main power and insert the shorting plug to the test point CN13 (2P) on the CONTROL board (setting IC05 pin 22 to �L�). Then turn ON the main power which activate the TEST mode. All displays flash once. If a recording is performed in the TEST mode, the REC MEMORY mode becomes active at the moment of recording so that the tape is rewound by the amount of recording when a tape is rewound after recording. After adjustment, be sure to remove the shorting plug from the test point CN13 (2P). Test Tape Type P-4-A100 WS-48B P-4-L300
Signal 10 kHz, �10 dB 3 kHz, 0 dB 315 Hz, 0 dB
Used for Azimuth Adjustment Tape Speed Adjustment PB Level Adjustment
� 29 �
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