DOWNLOAD Sharp XL-505E (serv.man5) Service Manual ↓ Size: 2.34 MB | Pages: 56 in PDF or view online for FREE

– 9 –

Play: TW-2412

Over 80 g

Play: TW-2111

30 to 70 g. cm

Fast forward: TW-2231

50 to 140 g.cm

Rewind: TW-2231

50 to 140 g.cm

MTT-111

In Motor

3,000 

±

Headphones
90 Hz

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

IF

450 kHz

1,620 kHz

T351

*1

 Band

—

522 kHz

(fL): T306

*2

Coverage

1.1 

±

 0.1 V

Tracking

990 kHz

990 kHz

(fL): T302

*1

98.00 MHz

98.00 MHz

VR351*1

Input: CNP301

(25 dB

µ

V)

Output: Speaker
Terminal

TAPE MECHANISM

M901
Motor

Volume in motor

•  FM RF
Signal generator: 1 kHz, 75 kHz dev., FM modulated

Band

—

87.50 MHz

(fL): L303

*1

Coverage

3.4 

±

 0.1 V

RF

98.00 MHz

98.00 MHz

L302

*2

(10~30 dB)

*1. Input: Antenna,

Output: TP301

*2. Input: Antenna,

Output: Speaker Terminal

•  Detection
Signal generator: 10.7 MHz, FM sweep generator

IF

10.7 MHz

98.00 MHz

T304(Turn

Input: Pin 1 of

the core of

IC301

T304 fully

Output: TP302

counter-
clockwise.

*1. Input: Antenna,

Output: Speaker Terminal

*2. Input: Input is not connected,

Output: TP301

• Setting the Test Mode
Keeping the BAND button and MEMORY button pressed, turn
on POWER. Then, the frequency is initially set in the memory
as shown in Table. Call it with the 

,

 button to use it

for adjustment and check of tuner circuit.

1

87.50 MHz

6

522 kHz

2

108.00 MHz

7

1,620 kHz

3

98.00 MHz

8

603 kHz

4

90.00 MHz

9

1,404 kHz

5

106.00 MHz

10

990 kHz

11~40

•  FM Mute Level
Signal generator: 1 kHz, 40 kHz dev., FM modulated

Adjust so that an output signal appears.

CNP301
ANTENNA

MAIN PWB

L302

IC301

1

T302

TP301

TP302

T304

FM IF

AM IF

AM
TRACKING

T306

AM BAND
COVERAGE

FM MUTE
LEVEL

T351

VR351

L303

FM BAND
COVERAGE

FM RF

•  AM IF/RF
Signal generator: 400 Hz, 30%, AM modulated

– 10 –

1. This CD unit need adjustment as follow.

Step 1

VR803 (Focus Offset)

DC + 40 mV (FEL>RFO)

FEI (R826) and VRO
(1-Pin of TP801)

Step 4

VR802 (Tracking Error Balance)

*1 (See Fig. 10-1)

TSO (3-Pin of TP801)
and VRO (1 Pin of TP801)

*1: Adjust to obtaiin vertically symmetrical waveform (Fig. 10-1) with respect toreference DC level. The reference level is VRO

(Approx DC 2.1V).

2. This CD unit have the following automatic adjustment function. Automatic adjustment item.

2-1: Focus Servo Gain (Fig. 10-2)

Focus Gain Adjustment is performed when disc is changed.

2-2: Tracking Servo Gain (Fig. 10-3)

Tracking Gain Adjustment is performed when disc is changed and disc is playbacked.

TSO

VRO

1

SYMMETRICAL
UP AND DOWN

FET

FSO

1

2

TSO

TS2O

1

2

VR802

VR803

TP801

TRACKING
ERROR
BALANCE

FOCUS
OFFSET

T

S

O

N

C

V

R

O

321

3 2 1

CD SERVO PWB

– 11 –

The Test Mode for this microcomputer has two variations, namely "regular Test Mode" for adjustment and measurement and "self-
diagnosis Test Mode" for self-judgment in final inspection of products.

To enter the each Test Mode, press the POWER key, holding down the following two keys in the regular standby mode (power
off state).  In this case only the main unit keys are valid.  The Test Mode is not set even when the remote controller POWER
key is turned on.

[Regular Test Mode]
1. CD  Test Mode (TEST 1)
2. Tuner Test Mode (TEST 3)
3. Electronic volume Test Mode (TEST 4)
4. Timer Test Mode (TEST 5)
5. LCD Test Mode (TEST 6)
[Self-diagnosis Test Mode]
1. Key input diagnosis TEST Mode (TESTA)

1. Step 1 Mode
    When the CD Test Mode is set, the following display lights, and the CD pickup slides to the innermost periphery.

After lighting for 1.5 sec

When the following operation key is pressed in this state, the following operation is performed.
"POWER" ................ The Test Mode is set to off, power is turned off, and the mode is changed to the regular standby mode.
"FF/FWD" ................ After the pickup returns once to the innermost periphery, the pickup slides to the external periphery while

................................. this key is held down.

"REW/REV" ............. After the pickup returns once to the innermost periphery, the pickup slides to the internal periphery while

................................. this key is held down.  However, input is invalid if PU-IN is on.

"PLAY" ..................... Shift to Step 2
"STOP" .................... Invalid

* In case of mode entry the pickup is moved to the internal periphery.  At this time entry of any key other than POWER key is

disabled until shift of pickup to the internal periphery is completed.  If PU-IN SW ON cannot be detected while waiting for 10
seconds, the slide motor is stopped, the following error is displayed, and entry of any key other than POWER key is disabled.

– 12 –

2. Step 2 Mode
    When the PLAY key is pressed in the mode above, the laser lighting is turned on.  In this state the laser is only turned on,
    and other operations are not performed.

When the following operation key is pressed in this state, the following operation is performed.
"POWER" ................ The Test Mode is set to off, power is turned off, and the mode is changed to the regular standby mode.
"FF/FWD" ................ While this key is held down, the pickup slides to the external periphery.
"REW/REV" ............. While this key is held down, the pickup slides to the internal periphery.  However, if PU-IN is on, entry is

................................. invalid.

"PLAY" ..................... Shift to Step 3
"STOP" .................... Return to Step 1

3. Step 3 Mode

While the laser is lighting, the focus servo is turned on, and focus search is performed.  If focusing failure occurs, focus search
is repeated until focusing is attained.

When the following operation keys are pressed in this state, the following operations are performed.
"POWER" ................ The Test Mode is set to off, power is turned off, and the mode is changed to the regular standby mode.
"FF/FWD" ................ While this key is held down, the pickup slides to the external periphery.
"REW/REV" ............. While this key is held down, the pickup slides to the internal periphery.  However, if PU-IN is on, entry is

................................. invalid.

"PLAY" ..................... If focusing has been attained, the process proceeds to Step 4.  Unless focusing has been attained,

................................. reception is inhibited.

"STOP" .................... Return to Step 1

4. Step 4 Mode

The disc is rotated and CLV is locked while the tracking servo is off.

The time display indicates always "0:00".

When the following operation keys are pressed in this state, thefollowing operations are performed.
"POWER" ................ The Test Mode is set to off, power is turned off, and the mode is changed to the regular standby mode.
"FF/FWD" ................ While this key is held down, the pickup slides to the external periphery.
"REW/REV" ............. While this key is pressed, the pickup slides to the internal periphery.  However, if PU-IN is on, entry is

................................. invalid.

"PLAY" ..................... Shift to Step 5
"STOP" .................... Return to Step 1