Sony HTC-VX500 Service Manual page 13

Record Bias Adjustment (Deck B)
Procedure:
1. Press the x (CD) button while pressing the DIRECTION
MODE button.
While pressing the x (CD) button, press the h (TAPE A)
2.
button, set the function to "deck B".
3. Insert a tape into deck B, press the z REC button, and then
press the N button to start recording.
4. Mode: Record
INPUT POINT
1) 315 Hz
2) 10 kHz
AF OSC
600 Ω
attenuator
5. Mode: Playback
recorded
position
set
6. Confirm playback the signal recorded in step 2 become
adjustment 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
Adjustment Location
[AUDIO BOARD] (Conductor Side)
RV341(Lch),RV441(Rch)
Record Bias
RV301 RV401
RV441 RV341
RV301(Lch),RV401(Rch)
Playback Level (Deck B)
} 50 mV (–23.8 dB)
blank tape
CS-123
PFJ-1
set
level meter
PFJ-1
output
point
RV311(Lch),RV411(Rch)
Playback Level (Deck A)
RV411
RV311
Record Level Adjustment (Deck B)
Procedure:
1. Press the x (CD) button while pressing the DIRECTION
MODE button.
While pressing the x (CD) button, press the h (TAPE A)
2.
button, set the function to "deck B".
3. Insert a tape into deck B, press the z REC button, and then
press the N button to start recording.
4. Mode: Record
INPUT POINT
315Hz 50 mV (–23.8 dB)
AF OSC
600 Ω
attenuator
5. Mode: Playback
recorded
position
set
6. Confirm playback the signal recorded in step 2 become
adjustment 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:
Output point from PFJ-1 playback level: 47.2 to 53.0 mV (–24.3 to
–23.3 dB)
Adjustment Location: MAIN board
[MAIN BOARD] (Component Side)
CNS102
CNS101
blank tape
CS-123
set
PFJ-1
level meter
PFJ-1
output
point
RV301
Record
Level (L ch)
CNP105
RV351
Record
Level (R ch)
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