Aiwa AM-CL33, Service Manual

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(4) Note

• If a disc had any stains or scars on, the adjustment may not be completed.
• Always place the main unit with its cassette cover upward for adjustment.
• Do not make any manual adjustments.
• If the adjustment is incomplete, it displays "NO ADJ" during normal operation.

(5) Prohibitions

Do not press DSL key of the remote controller. If it was pressed, the mode will change to factory shipment mode.
If any data is changed in this mode, the unit will not be able to function normally.
If accidentally change into this mode, initialize EEPROM and re-do all the adjustments.

2. Adjustment Procedures
(1) PIT Disc (TEST DISC: TGYS1)

Insert the disc and press "PLAY" key (make sure to place main unit with its cassette cover upward).
LCD of the remote controller will be displayed "AUTO ADJ H" first, then "COMPLEAT"

(2) GRV DISC (SONY MDW-74)

Insert the disc and press "PLAY" key (make sure to place main unit with its cassette cover upward).
LCD of the remote controller will be displayed "AUTO ADJ L" first, then "COMPLEAT"

*

If it displayed "Failed" during adjustment, it means that some abnormalities are deteced and the operation is
terminated.

(3) Checking RF Level and Error Rate

a)Press "–" key of the remote controller. Display "032c 00e" and playback.

Check the RF waveform (TP3) with an oscilloscope and it is within the 1.0

±

0.2Vp-p. If it

is not, follow the instruction below to make an adjustment.
• If the value is higher than 1.2Vp-p, short TP4.
• If the value is lower than 0.8Vp-p, short TP5.

b) Press "+" of the remote controller. Display "600c 00e" and playback.

Make sure if the error note is below "60e".

3. Others
(1) EEPROM Initialization

Press "DISPLAY" key, while it displays "IDLE", to start initialization of EEPROM.
Once the initialization is completed, LCD displays "EP INIT OK".
• Re-adjustments are required after every initialization. Otherwise it displaysÅuNO ADJUST!Åvduring the normal

operation.

(2) Checking Sled Operation

Press "F-SKIP" key, while it displays "IDLE", to shift puck-up towards the external circumference.
Press "B-SKIP" key, while it displays "IDLE", to shift puck-up towards the internal circumference.