This is a very good quality print (scan) of the original SONY service manual. The original from Sony is on very thin paper. Nevertheless it is very clear and sharp and excellent readable. I'm very satisfied to have now this rare document. I've looking for it many years (infrequent). It contains very detailed circuit diagrams, exploded views, part lists, PCB view with good readable connection lines. Very recommended.
Excellent product, very clear print. Detailed circuit and assembly diagrams - this enabled me to repair my CD player with confidence. I highly recommend this site.
Fast access, 100% correct and complete service manual
Text excerpt from page 10 (click to view)
1-3. Connection Input/Output Signals
Note 1 : Specifications of BATT IND Signal VTR has a battery voltage detection and waring signal generation circuits and it sends the signal shown below to the camera.
Battery Terminal Voltage (VTR internal battery) 12.0�11.1 Vdc 11.1�10.8 Vdc 1.0 ± 0.2 Hz duty 50 ± 10 % Input Signal at Pin 25 0V LED on Viewfinder Stays out Blinks at 1 Hz Lights up 10.8 Vdc or less
2�3 Vdc across 300 �
Note 2 : Specifications of REC ALARM Signal
+1 5.0 -0.5 Vdc Input Signal at Pin 24 2.5 ± 0.5 Vdc REC TALLY signal 1.0 ± 0.2 Hz duty 50 ± 10 % Power ON When VTR changes from POWER SAVE to REC START mode, or when the servo is lost
0 ± 0.3 Vdc Power OFF VTR Action
REC RESET signal 10�100 msec When VTR changes from STANDBY to REC START mode, or in REC mode At the end of STOP tape or When mode VTR is put into STOP mode by itself (REC RESET signal does not appear when VTR is put into STOP mode by operating the camera)
Note 3 : Specifications of TAPE REM Signal
Tape Remaining (VTR) TAPE1 +5 V +5 V 0V 0V TAPE2 +5 V 0V +5 V 0V +3.4 V +3.1 V +2.2 V 0V G TALLY lamp lights at +3.1 V (in connection with CCU) Input Signal at Pin 25 Remark
