ALPINE TCC-9210, TCC9010 Service Manual adj

- 2-1 -

SECTION 2. ELECTRICAL

ADJUSTMENTS

1. Test & Adjustment point

Figure 1. MAIN PCB Board

Figure 2. RF PCB Board

L204

L255

L205

L254 T201 T202 T256 T206

T101

C

D

VR301

E

B

A

(BEFORE RF P.C. BOARD)

- 2-2 -

(NEW RF P.C. BOARD)

L204 L254 L256 L206L201

(TOP VIEW)

Figure 3. RF PCB Board

L205L255 L202

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2. FM Adjustment

Figure 4.

(1) The impedance of FM antenna terminal is 75Ω

Therefore, connect coaxial cable (3C-2V etc.) between FM SG and antenna terminal when wiring.

(2) There are two kind in indication of FM SG output attenuator.

1) Attenuator with Marking of 75Ω open...open indication type

2) Attenuator with marking of 75Ω load or close...load or close indication type.

(3) FM SG output level in this FM adjustment are described as open indication type. The left table shows

relations among FM SG attenuator indication(dB), available power ratio(dBf) and antenna terminal
voltage(dB/µV) in each indication type.

Notes:

1. BAND Switch ········································································································································ FM

2. BALANCE ······································································································································· Center

3. TREBLE/BASS ································································································································ Center

4. Connect as shown in figure 3.

5. Refer to figure 1~2 for Adjustment Points.

Item FM SSG Attenuator Available Antenna

Type Indication Power Ratio Terminal Voltage

Open indication type 0dB 5.2dBf 6dB/µV

60dB 65.2dBf 66dB/µV

Load or close 0dB 11.2dBf 12dB/µV

indication type 54dB 65.2dBf 66dB/µV

FEED SIGNAL

STEP SUBJECT

FROM TO

MEASURE OUTPUT ADJUSTMENT ADJUST FOR

1 Discriminator 98MHz 60dB ANT Jack Between Point XX & Point T101 DC 0V±10mV

22.5kHz Dev. or XX, DC Volt Meter.
1kHz FM SSG Point XX

2 MPX 98MHz 60dB Same as Between Point XX & GND, VR301 76kHz±50Hz

Adjustment

75kHz Dev.1kHz

above

Frequency Counter

FM SSG

A

C

D

E

Stereo modulator

AUDIO OSC

SSG

GND

(Black Lead)

PRE OUT

(Red Lead)

(Yellow Lead)

Power Supply

OUT

EXT
MODE

ANT

Jack.

VTVM SCOPE

IN OUT

Unit

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3. AM(MW) Adjustment

Notes:

1. BAND Switch ··································································································································· AM(MW)

2. Connect as shown in figure 4.

3. Refer to figure 1~2 for Adjustment Points.

Figure 5.

FEED SIGNAL

STEP SUBJECT

FROM TO

MEASURE OUTPUT ADJUSTMENT ADJUST FOR

1 520 or 522kHz No Input LCD Display TUNE +/- Button 520 or 522kHz

(Reception Frequency)

Tuning Voltage Between Point XX and GND, L206 DC 1.2V±0.05V
Adjustment DC Volt Meter

2 IF Coil 600kHz or ANT Jack Output L or R ch, T201 & T202 Max. Output

Adjustment 603kHz ANT or PointXX VTVM & Oscilloscope

input, 30dB,
400Hz (30%
MOD) SSG.

3 600kHz or 600kHz or Same as LCD Display TUNE +/- Button 600 or 603kHz

603kHz 603kHz ANT above (Reception Frequency)
RF Adjustment input, 30dB,

400Hz (30%

Output L or R ch, L204 & L205 Max. Output

MOD) SG.

VTVM & Oscilloscope

A

B

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4. LW Adjustment(Optional)

Notes:

1. BAND Switch ··········································································································································· LW

2. Connect as shown in figure 5.

3. Refer to figure 1~2 for Adjustment Points.

Figure 6.

FEED SIGNAL

STEP SUBJECT

FROM TO

MEASURE OUTPUT ADJUSTMENT ADJUST FOR

1 144kHz No Input LCD Display TUNE +/- Button 144kHz

(Reception Frequency)

Tuning Voltage Between Point XX and GND, L256 DC 1.2V±0.05V
Adjustment DC Volt Meter

2 150kHz 150kHz ANT Jack LCD Display TUNE +/- Button 150kHz

RF Adjustment ANT input, or PointXX (Reception Frequency)

30dB, 400Hz
(30% MOD)

Output L or R ch, L254 & L255 Max. Output

SSG.

VTVM & Oscilloscope

A

B

- 2-6 -

5. Cassette Deck Adjustment

(1) Before this adjustment, clean PLAYBACK head surface.

(2) For this adjustment, use test tape MTT-114N.

(3) VOLUME ······································ Center

(4) BALANCE ···································· Center

(5) TREBLE/BASS ···························· Center

(6) Connect as shown in figure 6.

Figure 7.

GND

(Black Lead)

(Red Lead)

(Yellow Lead)

Power Supply

PRE-OUT

VTVM SCOPE

IN OUT

L-CH

R-CH

Unit

ANT

Jack.

Figure 8.

SUBJECT MEASURE OUTPUT SETTING ADJUSTMENT ADJUST FOR REMARKS

P.B Head L-CH, R-CH, VTVM and Playback(FWD & Adjust the azimuth Max. Output After this
Adjustment Scope See figure 6. REV) the TEST adjusting screw both channels adjustment, lock

TAPE MTT-114 (in figure 7). on FWD and the screw with

REV PLAY paint.

Screw Driver

Forward Head Azimuth
Adjustment Screw

Head