Hitachi DIGITAL 8 VM-D965LE Service Manual page 104

Active | Abbreviation
Function
O_| (Pulse) _|S-C DATA(FR)
Lats
Level
| (Pulse) |CS-SYC(FR)
Activates data communications with DV circuit board (IC1901 (DV SYSTEM
=
CONTROL uP)).
HP)).
l OV-3V | OVER-C
Pulse) | C LOCK(FR)
| OV-3V__| VCR KEYS2
l OV-3V__ | CHARGE C
Charge current detection input. Monitors the charge current during
| OV-3V__| BATTERY
Input to detect the battery remaining level.
50 | ----- | ----- GND Grounded.
52 | ----- | ----- AVdd 3V power input.
Lo EXT MIC
External microphone connect detection input.
OV-3V | TRACK ADJ.
as a tracking control.
For the connection of a tracking control for adjustment. When an ATF-R jig is
connected to PG0601 (test plug), the variable resistor on the ATF-R jig can be used
"Fl (Pulse) EST Take-up tape end detection input.
Pulse) | ESS Supply tape end detection input.
P ENV DET Playback (PB) FM signal input.
RSS
Supply/take-up reel sensor inputs. Used to calculate the remaining tape and to
detect reel lock.
Composite sync signal input. The separated vertical sync signal is divided by
two to generate the 1/2V.SYNC pulse which is used to control the cylinder speed
during recording (reference signa l).
Cylinder phase control signal input.
65 | Pulse) | TBC CONT
75 | | (Pulse) [CFG
counting of the linear time counter and recording restart control (assemble
recording).
69 O_| Hi LOAD Loading motor drive outputs.
70 QO | Hi UNLOAD
73 Q_ | PWM D.SPEED Cylinder servo control outputs.
74 QO | PWM C.SPEED Capstan servo control outputs.
76 | [Lo V-DET[Lo]
| a
Inputs whether a battery is attached or not. "Lo" is input when the battery is
detached, to shift the microprocessor to the backup mode in which the data is saved
| Hi DC900DET
Not used.
For data communications with IC0904 (CHARA. GEN.).
78 OQ _| (Pulse) |D. OUT
79 Q_| (Pulse) {CLOCK
O_| Hi T.FADE
Not used. Open
81 I Hi/Lo BATT. SERIAL | Baitery serial time detection input.
82 | -----_| ----- BEEP Not used.
83 | | (Pulse) |REMOCON Remote operation signal input from the infrared receiver.
84 I (Pulse) | 32kHz TEX IN_ | Generate 32kHz sub-clock pulses.
85 QO Pulse) | 32kHz TX OUT
86 | -----_| ----- GND Grounded.
87 | -----_| ----- Vdd SV power input.
88 | ----- | ----- | ---------- Not used. Connected to 3V line.
Not used. Open
C.REVERSE
Capstan motor reversing contro! output.