XL-HP600 (serv.man21) - Sharp Audio Service Manual (repair manual). Page 12

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01

When Pickup set inner position, inner switch
cannot detect 'ON' level for 10 secs.

10*

Cam error. Can't detect cam switch when cam is
moving.

11*

When it detect cam operation error during initialize
process.

20

Tray error. Can't detect tray switch when tray is
moving.

21

When it detect tray operation error during initialize
process.

31

When it change to CD function, DSP cannot read
initial data.

•••••     

Signal generator: 400 Hz, 30%, AM modulated

*1. Input: Antenna

Output: TP302

*2. Input: Antenna

Output: TP301

fL: Low-range frequency
fH: High-range frequency

AM IF

450 kHz

1,620 kHz

T351

*1

AM Band

—

522 kHz

(fL): T306

*2

Coverage

1.1 

±

 0.1 V

AM Tracking 990 kHz

990 kHz

(fL): T303

*1

(1) Offset adjustment (The offset voltage between the head

amplifier output and the VREF reference voltage is
compensated inside the IC.)

  * 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

•  Adjustment

Since this CD system incorporates the following automatic
adjustment functions, readjustment is not needed when
replacing the pickup. Therefore, different PWBs and pickups
can be combined freely.
Each time a disc is changed, these adjustments are
performed automatically. Therefore, playback of each disc
can be performed under optimum conditions.

* 'CHECKING'
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.

•  FM IF
Notes:
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 adjustment 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.

•••••

Play: TW-2111

Over 80 g

•

 Torque Check

Play: TW-2111

30 to 80 g.cm

Fast forward: TW-2231

70 to 180 g.cm

Rewind: TW-2231

70 to 180 g.cm

Normal

MTT-111

Variable

3,000 

±

 30 Hz

Speaker

speed

Resistor in

Terminal

motor.

(Load
resistance:
6 ohms)

•••••

TAPE MECHANISM

Tape
Motor

Variable Resistor in motor

R336

R357

AM

LOOP

ANTENNA

IC302

T351

IC303

L354

T303

T306

CNP302

SO301

FE301

MAIN PWB-A1

TP302

TP301

AM TRACKING fL

AM BAND
COVERAGE fL

AM IF

ANTENNA
TERMINAL