Pioneer DRM-7000 Service Manual page 127

6.4 SENSITIVITY ADJUSTMENT OF
THE MAGAZINE DISC OUT-OF-
POSITION SENSOR
• Purpose:
To adjust the LED output of the light-emitting block so that the
threshold value set to the combined screen factor of the
adjustment disc and filter.
• Method:
Adjust VR852 (FRONT) and VR851 (REAR) on the SIFB2 Unit
• Contents:
Adjust the voltage by connecting the voltage measuring
instruments (voltmeter or multimeter, etc.) to TP851 (FRONT)
and TP852 (REAR).
• Preparation:
(1) Prepare the adjustment disc and adjustment filter.
(2) Remove the all magazines (including hyper magazine) and
drives.
(3) Move the carriage base to the initial position (address 3).
(4) Connect a voltmeter (or multimeter, etc.) between TP851
(FRONT) or TP852 (REAR) and TP853 (GNDD) on the SIFB2
Unit.
• Adjustment point:
Semifixed volume control (VR852: FRONT, VR851: REAR)
Connect a voltmeter (or multimeter, etc.) to TP851 (FRONT)
and TP852 (REAR).
• How to enter the adjustment mode:
(1) Set key to UNLOCK position.
(2) Press the FUNCTION and ↑→ keys simultaneously for four
seconds.
(3) "Entering to the Tset Mode!!OK?" is displayed, then press ENT
key.
(4) Select "Sensor" and press ENT key.
(5) Select "Front sensor" or "Rear sensor" and press ENT key.
(6) "Front (Rear) sensor working" is displayed, then enter the disc
sensor adjustment mode.
• Adjustment procedure:
(1) Remove the second from the carriage base guard.
(2) Set the test mode to Disc sensor adjustment mode.
(3) Set the adjustment disc and adjustment filter so that it blocks
the optical axis. (Insert the adjustment disc and filter to slot 50
of the magazine and set to magazine bay #7 at front side and
set to magazine bay #16 at rear side.)
(4) Adjust VR852 (FRONT) and VR851 (REAR) on the SIFB2
Unit so that the voltage of TP851 (FRONT) and TP852 (REAR)
to the adjustment value which is mentioned in the adjustment
disc ± 0.2V.
6.5 ELEVATING SPEED ADJUST-
MENT
• Purpose:
To adjust the elevating speed of the carriage base.
• Method:
Adjust VR601 on the VMDB Unit
• Contents:
Adjust the phototransistor output of the light-receiving block.
• Preparation:
Connect an oscilloscope (10:1 probe) to TP601 (MMOUT) and
TP602 (GND) on the VMDB Unit.
• How to enter the adjustment mode:
(1) Set key to UNLOCK position.
(2) Press the FUNCTION and ↑→ keys simultaneously for four
seconds.
(3) "Entering to the Tset Mode!!OK?" is displayed, then press ENT
key.
(4) Select "Diag" and press ENT key.
(5) Select "Robotics" and press ENT key.
(6) Select "Individually" and press ENT key.
(7) Select "Elevation" and press ENT key.
(8) Select "Manual" and press ENT key.
(9) Carriage base moves to up and down with ←↓ and ↑→ keys
and generates a pulse from the rotary encoder.
• Adjustment procedure:
(1) Set VR601 on the VMDB Unit to the mechanical center.
(2) Turn the elevating motor by using the elevating manual
operation and generates a pulse from the rotary encoder.
(3) Adjust VR601 so that the pulse width of TP601 (MMOUT) to
13 ± 0.3 µsec.
Caution: Be carful because the carriage base is moved at high speed
by the mode.
6.6 LCD POWER SUPPLY VOLTAGE
ADJUSTMENT
• Purpose:
To adjust the power supply voltage of the LCD module.
• Method:
Adjust VR701 on the FRPB Unit
• Contents:
Connect a voltmeter (or multimeter, etc.) between CN702-pin 2
(VEE) and pin 1 (VSS), and adjust the voltage.
• Preparation:
(1) Remove the FRPB Unit from the front panel. (LCD module
and key SW unit are useless.)
(2) Connect the power supply of 12V ± 5% between CN701-pin 1
(V12) and pin 2 (GND12), and connect the voltmeter between
CN702-pin 2 (VEE) and pin 1 (VSS).
• Adjustment procedure:
Semifixed volume control (VR701)
Connect the voltmeter (or multimeter, etc.) between CN702-
pin 2 (VEE) and pin 1 (VSS).
(1) Set VR701 on the FRPB Unit to the mechanical center.
(2) Apply a 12V power supply.
(3) Adjust VR701 so that the voltage of CN702-pin 2 (VEE) to 5
± 0.05V.
DRM-7000
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