Cue Audio Alignment; Cue Playback Level Adjustment; Bias Trap Adjustment - Sony HDW-750 Maintenance Manual

10-3. CUE Audio Alignment

10-3. CUE Audio Alignment

10-3-1. Bias Trap Adjustment

Preparation
Remove the DCP-28 board, DVP-18 board and mechanism
deck dust protection sheet.
Adjustment Procedure
1. Insert a working tape and enter the REC mode.
2. Equipment : Oscilloscope
Measurement point : TP602 (D-6)/MDC-13 board
GND : E501 (C-5)/MDC-13 board
Adjustment point : 1LV601 (C-6)/MDC-13 board
Specifications : A = minimum
(Reference value : 2.5 Vp-p or less)
3. Eject the working tape.
10-8

10-3-2. CUE Playback Level Adjustment

Preparation
. S502 (A-3)/FP-121 board (B side) → ON
. DISPLAY CTL/TC/DATA switch/inside panel → TC
. 1RV603 (D-6) /MDC-13 → Mechanical center
. 1RV604 (D-6) /MDC-13 board (B side)
→ Mechanical center
Adjustment Procedure
1. Insert the alignment tape (HR5-1A) and playback the 1
kHz, 0 VU signal segment (TIME; 00 : 00 : 00 : 00 to
00 : 01 : 25 : 00).
(The playback frequency for the HDW-750CE is 833 Hz.)
Equipment :
Measurement point : AUDIO OUT connector/
Adjustment point : 1RV605 (D-6)/MDC-13 board
A
Specifications :
2. Playback the 1 kHz, _20 VU signal segment (TIME ;
00 : 01 : 30 : 00 to 00 : 02 : 25 : 00).
(The playback frequency for the HDW-750CE is 833 Hz.)
Equipment :
Measurement point : AUDIO OUT connector/
Measure the playback signal level.
3. Playback the 7 kHz, _20 VU signal segment (TIME ;
00 : 03 : 00 : 00 to 00 : 03 : 25 : 00).
(The playback frequency for the HDW-750CE is 5.8 kHz.)
Equipment :
Measurement point : AUDIO OUT connector/
Adjustment point : 1RV604 (D-6)/MDC-13 board
Specifications :
Audio analyzer
rear panel
CH1 (X) : Pin-2
CH1 (Y) : Pin-3
GND : Pin-1
(B side)
0.0 ± 0.1 dBm (600 Z)
Audio analyzer
rear panel
CH1 (X) : Pin-2
CH1 (Y) : Pin-3
GND : Pin-1
Audio analyzer
rear panel
CH1 (X) : Pin-2
CH1 (Y) : Pin-3
GND : Pin-1
(B side)
Within ± 0.2 dBm with reference
to the 1 kHz playback level
HDW-750/750CE V1