Aiwa XRMD-100, XRMD-101 Service manual
XR-MD100
U(S),K(S)
XR-MD101
EZ(S)
SERVICE MANUAL
• BASIC TAPE MECHANISM : 2ZM-1 YR9
MD/CD STEREO SYSTEM
This service manual contains information only on the TEST MODE and ELECTRICAL ADJUSTMENT
For more information, please refer to the following service manuals.
XR-MD100 U<S> (S/M Code No.09-993-315-0R1)
XR-MD100 K<S>/MD101 EZ<S> (S/M Code No.09-993-315-0R3)
<CD SECTION> of XR-MD100(U,K)/MD101(EZ).
• BASIC CD MECHANISM : 3ZG-3 E3N
• BASIC MD MECHANISM : 7ZG-9 YB
.
S/M Code No. 09-993-315-0S1
SUPPLEMENT
DATA
TEST MODE
1. CD Test Mode
1-1. Starting Up the CD Test Mode
While pressing the “CD” button, connect the AC plug to the power outlet. When the CD test mode starts up, all displays turn on.
1-2. How to Release the CD Test Mode
To release the CD test mode, press the “POWER” button or the function buttons other than the “CD” button, or disconnect the
AC plug from the power outlet.
1-3. Function Description of the Test Mode
MODE
Start mode
Focus search mode
Play mode
Traverse mode
Sled mode
Operation
CD key + AC
plug IN
STOP key
PLAY key
PAUSE key
F.SKIP key
B.SKIP key
Indication on
display
All indicators light
CD
Track No. and
playing time
(spectrum analyzer)
Track No. and
playing time
CD TEST
Function and movement
• CD TEST mode starts
• All indicators light
• LD lights
• Continuous focus search
• Continuous spindle motor
kick
• Normal playback
• When TOC reading is not
possible, the focus search
continues
• Tracking servo is turned off
• The pickup moves to the
innermost track
• The pickup moves to the
outermost track
Check item
• Check all indicators light
• Microprocessor
• DATA BUS LINE
• APC circuit
• LASER current
• Check the focus search
waveform
• Check the focus error
waveform
• Focus servo circuit
• DRF output
• Spindle servo line
• Same checks as shown in the
above column
• Each servo circuit
• Check the tracking error
waveform
• Tracking circuit
• Sled circuit
• Mechanism (gear and motor)
Note: If the focus search operation is continued for 10 minutes or longer, the driver IC heats up sufficiently to trigger the protection
circuit, which stops the CD system. Turn off the main power and re-start operation about 10 minutes later.
2. MD Test Mode
2-1. Starting Up the MD Test Mode
While pressing the “MD” button, connect the AC plug to the power outlet. About one second later after the MD test mode has
started up, the following message appears and the MD test mode becomes operable.
MD
Note: 1. If operation of the mechanism shows any abnormality during the test mode, disconnect the AC plug immediately.
2. Playback and recording are not possible during the test mode.
3. If a disc cannot be inserted, insert a disc part way and press the “CD 2 MD DIRECT REC” button. The disc can then be
fully inserted.
T
S
ET
2
2-2. How to Exit the MD Test Mode
A
L
SV
L
OF F
1) Press the “MD EJECT” button and remove the disc.
2) Disconnect the AC plug from the power outlet.
* If the machine exits the MD test mode by any methods other than the procedure described above, the machine may operate
abnormally when the POWER is turned on next time. If this happens, disconnect the AC plug.
2-3. Operation Check Mode
1) Checks after the test mode has started up
The following playback audio circuits can be checked.
• The circuits that can be checked: ..................... DAC, LINE AMP and HEADPHONE AMP
• Output level: .................................................... 1 kHz, -21 dB
2) Switch status check
The ON/OFF states of the respective switches on the machine and mechanism can be checked on the display.
Switch Name Switch State Indication on display Usable disc
REC PROTECT When the write-protection tab of a disc is closed to ON ROCK Disc for record/playback
REFRECT When the high reflection disc (CD) is used POP Disc for playback only
INNER
3) How to Switch to Servo Standby Mode
When the MD test mode has been established, the mode changes to the servo standby mode and “ALL SV OFF” is displayed
by pressing the 9 button. The various check modes can be entered from this mode. Pressing the 9 button during each
operation returns to “ALL SV OFF”.
When the pickup is at the innermost
track (when the LIMIT switch is ON)
JAZZ —
4) Checking the Sled Operation
The operation of the sled motor and pickup can be checked by pressing the
track) buttons in the “ALL SV OFF” state. “T.SLED FWD” appears while moving to the outermost track and “T.SLED
RVS” appears while moving to the innermost track.
5) Checking the Laser Output
The laser power output level is switched each time the “MD EDIT” button is pressed when “ALL SV OFF” appears and the
operation stops. The laser power output level is repeatedly changed in the order of OFF LASER READ ™ LASER 1/2 ™
LASER WRITE. The indications are as follows.
MODE Indication on display
OFF ALL SV OFF T-BASS
LASER READ LASER READ T-BASS
LASER 1/2 WRITE LASER 1/2 T-BASS
LASER WRITE LASER WRITE T-BASS
* After checking, press the 9 button to return the display to “ALL SV OFF”.
6) Checking the Operation of OWH (Over Write Head)
The OWH operation can be checked in the loading-completed state.
“MD 2 CD” button ............. OWH DOWN
“ / MD EJECT” button......OWH UP
Note: Do not move down the OWH while using a high reflection disc (CD).
6 (to outermost track) and 5 (to innermost
3
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