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– 14 –
Record Bias Adjustment (Deck B)
Procedure:
INTRODUCTION
When set to the test mode performed in
Tape Speed Adjust-
ment
,
when the tape is rewound after recording, the “REC memory
mode” which rewinds only the recorded portion and playback is
set.
This “REC memory mode” is convenient for performing this ad-
justment. During recording, the input signal FUNCTION will auto-
matically switch to VIDEO.
1. Press FUNCTION button to select VIDEO. (This step is not
necessary if the above test mode has already been set.)
2. Load a tape into deck B, and press the
r
REC button.
3. Mode: Record
4. Mode: Playback
5. Confirm playback the signal recorded in step 2 become adjust-
ment level as follows.
If these levels do not adjustment level, adjust the RV341 (L-CH)
and RV441 (R-CH) on the AUDIO board to repeat steps 3 and 4.
Adjustment level: The playback output of 10 kHz level difference
against 315 Hz reference should be ± 1.0 dB.
Adjustment Location: AUDIO board
Record Level Adjustment (Deck B)
Procedure:
INTRODUCTION
When set to the test mode performed in
Tape Speed Adjust-
ment
, when the tape is rewound after recording, the “REC memory
mode” which rewinds only the recorded portion and playback is
set.
This “REC memory mode” is convenient for performing this
adjustment. During recording, the input signal FUNCTION will au-
tomatically switch to VIDEO.
1. Press FUNCTION button to select VIDEO. (This step is not
necessary if the above test mode has already been set.)
2. Load a tape into deck B, and press the
r
REC button.
3. Mode: Record
4. Mode: Playback
5. Confirm playback the signal recorded in step 2 become adjust-
ment level as follows.
If these levels do not adjustment level, adjust the RV301 (L-CH)
and RV351 (R-CH) on the MAIN board to repeat steps 3 and 4.
Adjustment level:
CN403 playback level: 47.2 to 53.0 mV (–24.3 to –23.3 dB)
Adjustment Location: MAIN board
Adjustment Location
[AUDIO BOARD] (Conductor Side)
[MAIN BOARD] (Component Side)
AF OSC
VIDEO/MD (AUDIO) IN
1) 315 Hz
2) 10 kHz
blank tape
CS-123
set
attenuator
600
Ω
} 50 mV (–23.8 dB)
recorded
position
level meter
set
main board
CN403
Pin
3
(L-CH)
Pin
1
(R-CH)
AF OSC
VIDEO/MD (AUDIO) IN
1) 315 Hz
2) 10 kHz
blank tape
CS-123
set
attenuator
600
Ω
} 50 mV (–23.8 dB)
recorded
position
level meter
set
main board
CN403
Pin
3
(L-CH)
Pin
1
(R-CH)
RV341(Lch),RV441(Rch)
Record Bias
RV301
RV401
RV441 RV341
RV301(Lch),RV401(Rch)
Playback Level (Deck B)
RV651 (Normal Speed)
RV652 (High Speed)
Tape Speed
RV651
RV311(Lch),RV411(Rch)
Playback Level (Deck A)
RV652
RV311
RV411
CN403
IC401
1
3
RV351
Record Level
(R CH)
RV301
Record Level (L CH)
Содержание HCD-XB88AVK
Страница 4: ... 4 Front Panel 1 7 8 9 º ª 2 3 4 6 º ª º ª º º º ª 5 SECTION 1 GENERAL ª ...
Страница 29: ... 41 42 6 10 SCHEMATIC DIAGRAM MAIN 3 5 SECTION See page 35 for Printed Wiring Board HCD XB88AVK XB88K ...
Страница 30: ... 43 44 6 11 SCHEMATIC DIAGRAM MAIN 4 5 SECTION See page 35 for Printed Wiring Board HCD XB88AVK XB88K ...
Страница 33: ... 49 50 6 14 SCHEMATIC DIAGRAM DECK SECTION See page 81 for IC Block Diagrams HCD XB88AVK XB88K Page 45 Page 45 ...
Страница 35: ... 53 54 6 16 SCHEMATIC DIAGRAM POWER SECTION See page 81 for IC Block Diagrams HCD XB88AVK XB88K ...
Страница 39: ... 61 62 6 20 SCHEMATIC DIAGRAM TC CD PANEL 1 SECTION HCD XB88AVK XB88K Page 55 Page 55 ...
Страница 40: ... 63 64 HCD XB88AVK XB88K 6 21 SCHEMATIC DIAGRAM HP MIC SECTION See page 81 for IC Block Diagrams ...
Страница 43: ... 69 70 6 24 SCHEMATIC DIAGRAM CD MOTOR SECTION See page 81 for IC Block Diagrams HCD XB88AVK XB88K Page 40 ...
Страница 44: ... 71 72 6 25 PRINTED WIRING BOARD TRANS SECTION See page 16 for Circuit Boards Location HCD XB88AVK XB88K ...
Страница 45: ... 73 74 6 26 SCHEMATIC DIAGRAM TRANS SECTION HCD XB88AVK XB88K ...