2 – 1
1. MECHANISM SECTION
• Driving Force Check
• Torque Check
2. TUNER SECTION
fL: Low-range frequency
fH: High-range frequency
• AM IF/RF
Signal generator: 400 Hz, 30%, AM modulated
1. Description of the "FM IF Adjustment" is not carried on this Manual.
It is because the IF coil in the FM front end section has been best
adjusted in the factory so that its further adjustment is not needed
at the field. When replacing the FM front end assembly, no adjust-
ment is needed either.
2. The parts in the FM front end section are prepared in a complete
unit, so you can't obtain each part individually.
• Tape Speed
3. CD SECTION
Since this CD system incorporates the following automatic adjust-
ment functions, readjustment is not needed when replacing the
pickup. Therefore, different PWBs and pickups can be combined
Each time a disc is changed, these adjustments are performed
automatically. Therefore, playback of each disc can be performed
under optimum conditions.
Items adjusted automatically
1) Offset adjustment (The offset voltage between the head amplifier
output and the VREF reference voltage is compensated inside the
Focus offset adjustment
Tracking offset adjustment
2) Tracking balance adjustment
3) Gain adjustment (The gain is compensated inside the IC so that the
loop gain at the gain crossover frequency will be 0 dB.)
Focus gain adjustment
Tracking gain adjustment
4. CD ERROR CODE DESCRIPTION
If Error is detected, 'CHECKING' will be displayed instead of 'ER-
CD**'. 'ER-CD**' display will only be displayed when error had been
detected for the 5th times.
Over 80 g
30 to 80 g.cm
Fast forward: TW-2231
70 to 180 g.cm
70 to 180 g.cm
1.1 ± 0.1 V
*1. Input: Antenna
*2. Input: Antenna
Figure 2 ADJUSTMENT POINTS
AM TRACKING fL
3,000 ± 30 Hz
When Pickup set inner position, inner switch cannot detect
'ON' level for 10 secs.
CAM error. Can't detect CAM switch when CAM is moving.
When it detect cam operation error during initialize process.
TRAY error. Can't detect TRAY switch when TRAY is mov-
When it detect TRAY operation error during initialize pro-
When it detect invalid TRAY switch during normal operation.
When it change to CD function, DSP cannot read initial data.
Variable Resistor in motor