AIWA HVFX7000
Service Manual

Pin No. 63 64

Pin Name � �

I/o � � Not used. Not used.

Description

Detects signal for clock and Data for ACSS between Clock and Data at IC501 pins 90, 65 ACSS ENA l� o 91. End sensor to detect tape�s terminal (Lead tape section). If �H� signal is detected in the 66 67 68 69 70 71 72 S-UP CTL. MONITOR TEST (GND) X-TAL 2 X-TAL 1 Vss (SYS) Osc 1 I ~-COM. 2. When VCC is applied, Oscillation occurs. (But when �L� is applied to pin 89 in 73 74 75 Osc 2 OSD �H� OPTION RETURN 0 power failure, oscillation stops.) o I High �H� applied, turns on the OSD or POWER. Port for checking option diode. 1. When REC mode is operating normally, outputs �H�. 76 REC START �H� o 2. Switched to REC mode by operating audio, Y/C preamp. 3. Outputs �H� and record audio, video signals on the tape. 77 78 79 80 81 ACSS PWR ON I-LIMIT Co SYNC CAPSTAN ADJ. DRUM ADJ. o motor drive or stop. o Output pulses for correcting speed of the drum motor in the slow mode. 1. This pin receives remote control data through RC601, which amplifies and detects 82 R13MOCON I the WC signal. 2. After input signal is decoded in u-COM (IC501), and performs related key operation, 83 84 85 86 87 88 SHUTTLE 4 SHUTTLE 3 SHUTTLE 2 SHUTTLE 1 C SYNC � I I I I 1. Input C-Sync (composite sync) to confirm whether video signal is present or not. I 2. Confirms by counting 1 H (63.5 psec) horizontal sync for a fixed time period. Not used. Still signal inputs. o I 2. When this port inputs �L�, the capstan motor stops. Not used. Outputs pulses for correcting speed of the capstan motor in the slow mode and capstan Power supply control singnal output. 1. Input signal for stopping capstan motor. I FF mode, then REW mode will occur automatically. � � 0 I Not used. GND 1.32.768 kHz oscillator is used as standard clock the for clock display. 2. When VCC supplied, oscillation occurs. ~-COM main ground 1.10 MHz oscillator is used to generate the standard clock used to operate the

45