Sony HCD-MDX10 Service Manual - Page 37

Deck A is RV311 L-CH and RV411 R-CH, deck B is RV301, Playback Level Adjustment Deck

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Page 37 highlights

Tape Speed Adjustment (Deck A) Note: Set the test mode using the following method and begin tape speed adjustment. In the test mode, the speed will switch to double speed or normal speed each time the HI DUB button is pressed. Procedure: With the power turned ON, press the p button, ENTER/NEXT button, and DISC 3 button simultaneously. (The "CD TYPE INDICATOR" on the fluorescent display tube will blink while in the test mode.) To exit the test mode, press the 1/u button. 1. Insert the WS-48B into deck B. 2. Press the ( button of deck B. 3. Press the HI DUB button and play the tape at double speed. 4. Adjust RV1001 of the LEAF SW board so that the reading of the frequency counter becomes 6000 ± 180 Hz. 5. Press the HI DUB button and play the tape at normal speed. 6. Adjust RV1002 of the LEAF SW board so that the reading of the frequency counter becomes 3000 ± 90 Hz. Adjustment Location: LEAF SW board Sample Value of Wow and flutter W.RMS (JIS) less than 0.3% (test tape: WS-48B) Playback Level Adjustment (Deck A, Deck B) Procedure: Mode: Playback test tape P-4-L300 (315Hz, 0dB) level meter set VIDEO (AUDIO) OUT Deck A is RV311 (L-CH) and RV411 (R-CH), deck B is RV301 (L-CH) and RV401 (R-CH) so that adjustment within the following adjustment level. Adjustment level: CN301 playback level: 301.5 to 338.3 mV (-8.2 to -7.2 dB) level difference between the channels: within ± 0.5 dB Adjustment Location: AUDIO board Record Bias Adjustment (Deck B) Procedure: INTRODUCTION When set to the test mode performed in Tape Speed Adjustment, 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 automatically switch to VIDEO. (After recording, press the - 0 button without stopping will return to the position where recording was started.) 1. Press FUNCTION button to select VIDEO. (This step is not necessary if the above test mode has already been set.) 2. Insert a tape into deck B, press the REC button, and then press the ( button to start recording. 3. Mode: Record VIDEO (AUDIO) IN 1) 2) 315 Hz 10 kHz } 50 mV (-23.8 dB) AF OSC 600 Ω attenuator blank tape CS-123 set 4. Mode: Playback recorded position level meter set VIDEO (AUDIO) OUT 5. Confirm playback the signal recorded in step 2 become adjustment level as follows. If these levels do not adjustment level, adjust the RV341 (LCH) 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 Adjustment Location [LEAF SW BOARD] RV1001(High Speed) RV1002(Normal Speed) Adjustment Location: [AUDIO BOARD] (Conductor Side) RV341(Lch),RV441(Rch) Record Bias RV311(Lch),RV411(Rch) Playback Level (Deck A) RV1002 RV1001 RV301 RV401 RV441 RV341 RV301(Lch),RV401(Rch) Playback Level (Deck B) RV411 RV311 - 37 -

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– 37 –
Tape Speed Adjustment (Deck A)
Note:
Set the test mode using the following method and begin tape
speed adjustment.
In the test mode, the speed will switch to double speed or
normal speed each time the
HI DUB
button is pressed.
Procedure:
With the power turned ON, press the
p
button,
ENTER/NEXT
button, and
DISC 3
button simultaneously.
(The “CD TYPE INDICATOR” on the fluorescent display tube will
blink while in the test mode.)
To exit the test mode, press the
1/u
button.
1.
Insert the WS-48B into deck B.
2.
Press the
(
button of deck B.
3.
Press the
HI DUB
button and play the tape at double speed.
4.
Adjust RV1001 of the LEAF SW board so that the reading of
the frequency counter becomes 6000 ± 180 Hz.
5.
Press the
HI DUB
button and play the tape at normal speed.
6.
Adjust RV1002 of the LEAF SW board so that the reading of
the frequency counter becomes 3000 ± 90 Hz.
Adjustment Location:
LEAF SW board
Sample Value of Wow and flutter
W.RMS (JIS) less than 0.3%
(test tape: WS-48B)
Playback Level Adjustment (Deck A,
Deck B)
Procedure:
Mode: Playback
Deck A is RV311 (L-CH) and RV411 (R-CH), deck B is RV301
(L-CH) and RV401 (R-CH)
so that adjustment within the following adjustment level.
Adjustment level:
CN301 playback level: 301.5 to 338.3 mV (–8.2 to –7.2 dB)
level difference between the channels: within ± 0.5 dB
Adjustment Location:
AUDIO board
Adjustment Location
[LEAF SW BOARD]
test tape
P-4-L300
(315Hz, 0dB)
level meter
set
VIDEO (AUDIO) OUT
RV1002
RV1001
RV1002(Normal Speed)
RV1001(High Speed)
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.
(After recording, press the
–
0
button without stopping will
return to the position where recording was started.)
1. Press
FUNCTION
button to select VIDEO. (This step is not
necessary if the above test mode has already been set.)
2. Insert a tape into deck B, press the
REC
button, and then press
the
(
button to start recording.
3.
Mode: Record
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
4.
Mode: Playback
recorded
position
level meter
set
VIDEO (AUDIO) OUT
AF OSC
VIDEO (AUDIO) IN
1)
315 Hz
2)
10 kHz
blank tape
CS-123
set
attenuator
600
Ω
} 50 mV (–23.8 dB)
Adjustment Location:
[AUDIO BOARD]
(Conductor Side)
RV441 RV341
RV301(Lch),RV401(Rch)
Playback Level (Deck B)
RV301 RV401
RV341(Lch),RV441(Rch)
Record Bias
RV311(Lch),RV411(Rch)
Playback Level (Deck A)
RV311
RV411