Section 2. Electrical; Adjustments - LG LM-M530A/D/X Service Manual

SECTION 2. ELECTRICAL

This set has been aligned at the factory and normally will not require further adjustment. As a result, it is not
recommended that any attempt is made to modificate any circuit. If any parts are replaced or if anyone tampers
with the adjustment, realignment may be necessary.
IMPORTANT
1. Check Power-source voltage.
2. Set the function switch to band being aligned.
3. Turn volume control to minimum unless otherwise noted.
4. Connect low side of signal source and output indicator to chassis ground unless otherwise specified.
5. Keep the signal input as low as possible to avoid AGC and AC action.
TAPE DECK ADJUSTMENT
1. AZIMUTH ADJUSTMENT
Deck Mode
A Deck Playback
B Deck Playback
Test Tape
MTT-114
2. MOTOR SPEED ADJUSTMENT
Deck Mode Test Tape
Normal Speed
HI-Speed
Test Tape
MTT-111
❏ ADJUSTMENTS
Test Tape
MTT-114
MTT-114
Head
Playback Mode
Speaker Out
L out
L ch
Unit
R ch
R out
Figure 1. Azimuth Adjustment Connection Diagram
Test Point
MTT-111 Speaker Out
MTT-111 Speaker Out
Head
Playback Mode
Unit
Record/Playback
head
Figure 2. Motor Speed Adjustment Connection Diagram
Test Point Adjustment
DECK Screw
Speaker Out
Azimuth Screw
Speaker Out Azimuth Screw
Electronic
Voltmeter
Adjustment Adjust for
VR201 3kHz ± 1%
more than 5.4kHz
Speaker Out
L out
R out
GND
- 2-1 -
Adjust for
Maximum
Maximum
Dual-trace
synchroscope
CH1 CH2
GND
Remark
A Deck
HI-Speed Dubbing Mode
Frequency Counter