Adjustment - Sharp MD-DR470HS Service Manual

MD-DR470H/MD-DR480H
Test disc
MD adjustment needs two types of disc, namely recording disc (low reflection disc) and playback-only disc (high
reflection disc).
Type
1 High reflection disc
2 Low reflection disc
3 Low reflection disc
4 Extension cable
5 Extension relay PWB
Note: Use the low reflection disc on which music has been recorded.
Entering the TEST mode
1. Setting by the main unit operation (when in the stand-by
mode)
1
Keep holding down the VOLUME + button and press the
2 PLAY button.
With the PLAY button pressed, release the VOLUME +
3 button.
With the PLAY button pressed, release the VOLUME –
4 button.
Keep holding down the VOLUME – button, release the PLAY
5 button and then release the VOLUME – button.
The test mode stops, and [ T E S T _ ] appears.
2. Setting by the remote control operation (when in the
stand-by mode)
1
2 Switch the HOLD button from OFF to ON.
3 Hold down the VOLUME – button.
With the VOLUME – button pressed, switch the HOLD
button to from ON to OFF. (Complete steps
seconds.)
Extension Relay PWB
(RUNTK0613AFZZ)
Optical Pickup (17)
MD Mechanism
Operation Button
Flexible PWB Ass'y

ADJUSTMENT

Test disc
MMD-110 (TEAC Test MD)
MMD-213A (TEAC Test MD)
Recording mini disc
Performance test (extension cable for motors)
Performance test (extension relay PWB for motors)
1 3
to within 2
Extension Cable
(QCNWN6936AFZZ)
Mechanism Flexible PWB
LCD Unit (227)
Parts No.
88GMMD-110
88GMMD-213A
UDSKM0001AFZZ
QCNWN6936AFZZ
RUNTK0613AFZZ
4
Keep holding down the VOLUME – button and release the
5 PLAY button.
With the PLAY button pressed, release the VOLUME –
6 button and then release the PLAY button.
7 The test mode stops, and [ T E S T _ ] appears.
Press "VOLUME +" to check the version of the microcom-
8 puter. (It is displayed on the remote control only.)
Press "VOLUME –" to light up the whole LCD.
Leaving the TEST mode
1
Press the STOP button in the test mode stop state, and with
2 the version displayed or the whole LCD on.
3 Update the rewritable area of EEPROM.
Switch to the standby mode.
Shipping setting method
1
Keep holding down the VOLUME – and the PLAY button on
2 the main unit, and then plug in the AC adapter.
Make sure [INIT] changes to [BYE OK] on the main unit or
the remote control.
MAIN PWB
CN601
Figure 8
– 8 –
CN451
CN101