TUNER ADJUSTMENTS

Use a plastic screw driver for adjustments.

MODE : ST (Stereo)

Speaker impedance : 4 ohm

TUNING

FM : 87.5 - 108MHz

MW: 522 - 1611kHz

LW : 144 - 288kHz

 

 

 

 

 

Standatd Input: 60dB

 

 

 

 

 

 

 

 

 

 

Antenna

: 75 unbalanced , Modulation : 1 kHz

 

1. FM

 

 

 

Dev.

: ±22.5kHz(MONO)

22.5kHz(STEREO) ±6.75kHz(PILOT)

 

 

 

 

 

 

 

 

 

 

 

Step

 

Adjusting

 

Connection

 

SG

Set

 

Adjustment

 

Remark

 

 

Circuit

Input

 

Output

 

Frequency

Position

 

 

 

1

 

IF(0V)

98.0MHz.Input Level

 

Alignment voltage IC231

 

98MHz

Low

 

XF233

 

Alignment voltage IC231

 

 

 

 

 

 

 

 

 

 

Adjustmen

 

 

 

 

 

 

 

 

 

FM Antenna SG=66dBμV

 

3-22pin(TP24,25) is 0.0±0.05V

 

 

 

 

 

 

3-22pin is 0.0±0.5V

 

 

 

 

 

 

 

 

 

 

 

 

 

2

 

Cover

---

 

Connect Digital DC voltmeter to

 

87.5MHZ

Low

 

---

 

1.4±0.05V

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Voltage

---

 

TP11(H), TP12(E).

 

108.0MHZ

High

 

---

 

6.8±0.5V

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SG Modulation

: 1kHz, 30%

 

2. MW

 

 

Antenna, IRE Loop, Distance : 60 cm

 

 

Step

 

Adjusting

 

Connection

 

 

SG

Set

Adjustment

Remark

 

 

Circuit

Input

 

Output

 

 

Frequency

Position

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1

 

 

 

 

Connect Sweep generator to test

 

 

450kHz

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

IF

---

 

point TP13(L)or TP14(R) and TP15(E).

 

(at 999kHz)

Low

T2002

AF Maximum

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2

 

Cover

---

 

Connect Digital DC voltmeter to

 

522kHZ

Low

L2153

1.00±0.05V

 

 

 

 

 

 

 

 

 

 

 

 

 

Voltage

---

 

TP11(H )and TP12(E).

 

1611kHZ

High

6.70±0.10V

 

 

 

 

 

3

 

Tracking

Connect AM SG to

 

Connect to VTVM

 

 

603KHZ

Low

L2151

AF Maximum

 

 

 

Test loop Ant.

 

point TP13(L)or TP14(R) and TP15(E).

 

1404kHZ

High

CT252

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

3. LW

 

 

 

 

 

 

 

 

 

 

Step

 

Adjusting

 

Connection

 

 

SG

Set

Adjustment

Remark

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Circuit

Input

 

Output

 

 

Frequency

Position

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1

 

Cover

---

 

Connect Digital DC voltmeter to

 

 

144kHZ

Low

L2154

1.00±0.05V

 

 

Voltage

---

 

TP11(H) and TP12(E).

 

 

288kHZ

High

---

5.42±0.10V

2

 

Tracking

Connect AM SG to

 

Connect to VTVM

 

 

162kHZ

Low

L2152

AF Maximum

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Test loop Ant.

 

point TP13(L)or TP14(R) and TP15(E).

 

279kHZ

High

CT251

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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Sanyo DC-DA370 service manual Tuner Adjustments, Tuning