Sharp XL-HP700, Руководство по обслуживанию

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XL-HP700
CD ERROR CODE DESCRIPTION
Error Explanation
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.
22*
When it detect invalid TRAY switch during normal
operation.
23*
When it detect invalid TRAY switch during initialize
procecss.
31
When it change to CD function, DSP cannot read
initial data.
Test Stage
Frequency Frequency
Display
Setting/
Adjusting
Parts
Instrument
Connection
CD SECTION
•••••
AM IF/RF
Signal generator: 400 Hz, 30%, AM modulated
*1. Input: Antenna Output: TP302
*2. Input: Antenna Output: TP301
TUNER SECTION
fL: Low-range frequency
fH: High-range frequency
AM IF 450 kHz 1,602 kHz T351 *1
AM Band — 531 kHz (fL): T306 *2
Coverage 1.1
±
0.1 V
AM Tracking 990 kHz 990 kHz (fL): T303 *1
Figure 9-2 ADJUSTMENT POINTS
Items adjusted automatically
(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.
R357
FM/AM
LOOP
ANTENNA
IC302
T351
IC303
T303
T306
T301
T302
L312
CNP302
IC301
MAIN PWB-A1
TP302
TP301
AM TRACKING fL
AM BAND
COVERAGE fL
AM IF
FM IF
FM RF
FM OSC
* '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.
ADJUSTMENT
MECHANISM SECTION
•••••
Driving Force Check
Torque Meter Specified Value
Play: TW-2111 Over 80 g
•
Torque Check
Torque Meter
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
Specified Value
Specified
Value
Adjusting
Point
Instrument
Connection
Test Tape
Normal MTT-111 Variable 3,000
±
30 Hz Speaker
speed Resistor in Terminal
motor. (Load
resistance:
6 ohms)
•••••
Tape Speed
Figure 9-1
TAPE MECHANISM
Tape
Motor
Variable Resistor in motor
*1. Input: Antenna Output: TP301
*2. Input: Antenna Output: Speaker terminal
•••••
FM RF
Signal generator: 1 kHz, 40 kHz dev., FM modulated
FM Band — 87.50 MHz T301 (fL): *1
Coverage 1.3 V
±
0.1 V
FM RF 98.00 MHz 98.00 MHz L312 *2
(10-30 dB)
Test Stage Instrument
Connection
Frequency Frequency
Display
Setting/
Adjusting
Point
•••••
FM IF
Signal generator: 10.7 MHz, FM modulated
IF 10.7 MHz 98 MHz T302 *1
(Turn the
core of trans-
former T302
fully counter-
clock wise)
Test Stage Instrument
Connection
Frequency Frequency
Display
Setting/
Adjusting
Point
*1. Input: Antenna Output: TP301