How to repair Aiwa 4ZG-1 CD changer mechanism, Circuit diagram, Test mode, Rotating phase adjust of the mechanism
4ZG-1-
Aiwa CD mechanism KSM-2131FAM, 3ZG-2 E1, 3ZG-2 E3, 3ZG-2 E4
How
to Adjust the Rotating Phase of the Gear, Main Cam
1) Push down the hooking catch of the CHAS. MECH, and remove the TRAY.
2) Align the arrow mark of the Gear, Main Cam with the black round mark of the CHAS, MECHA as shown below.
3) Confirm that the Slide, Mech Cam is located in the right position, then insert the TRAY gently.
Caution: If the rotating phase of the Gear, Main Cam is incorrectly adjusted, the chucking operation and tray movement will have malfunction.
1) Push down the hooking catch of the CHAS. MECH, and remove the TRAY.
2) Align the arrow mark of the Gear, Main Cam with the black round mark of the CHAS, MECHA as shown below.
3) Confirm that the Slide, Mech Cam is located in the right position, then insert the TRAY gently.
Caution: If the rotating phase of the Gear, Main Cam is incorrectly adjusted, the chucking operation and tray movement will have malfunction.
CD changer mechanism - Exploded view
CD mechanism - Exploded view
Schematic diagram
How
to Activate CD Test Mode
Insert the AC plug while pressing the function CD button.
All FL display tubes will light up, and the test mode will be activated.
Insert the AC plug while pressing the function CD button.
All FL display tubes will light up, and the test mode will be activated.
How
to Cancel CD Test Mode
Either one of the following operations will cancel the CD test mode.
• Press the function button.
Either one of the following operations will cancel the CD test mode.
• Press the function button.
• Press the power switch button. (except CD
function button) • Disconnect the AC plug.
CD
Test Mode Functions
When test mode is activated, the following mode functions from No.1 to No.5 can be used by pressing the operation keys.
There
are cases when the tracking servo cannot be locked owing to the protection
circuit being operated when heat builds up in the driver IC if the focus search
is operated continually for more than 10 minutes. In these cases the power
supply should be switched off for 10 minutes until heat has been reduced and
then re-started.When test mode is activated, the following mode functions from No.1 to No.5 can be used by pressing the operation keys.
Do
not press the |<< or >>| keys when the machine is in the “Pause”
status is active. If they are pressed, playback will not be possible
after the “Pause” status has been canceled. If the |<< or >>| keys are pressed in the “Pause” status, press the “Stop” key and return to the start mode.
after the “Pause” status has been canceled. If the |<< or >>| keys are pressed in the “Pause” status, press the “Stop” key and return to the start mode.
When
pressing the |<< or >>| keys, take care to avoid damage to the
gears. Because the sled motor is activated when the |<< or >>| keys
are pressed, even when the pick-up is at the outermost or innermost track.
If
the DISC DIRECT PLAY button is pressed, the machine performs the same operation
as the PLAY button is pressed. If the tray is opened by pressing OPEN/CLOSE
button during Play mode or Traverse mode, the machine returns to the Start
mode.
