Adjustment; Safety Caution; Case Outlines; Pcb Assembly - Rotel RA-1070 Technical Manual

Adjustment

Instruments : DC milli–voltmeter
Notes : Prior to Bias Adjustment, run about 5minutes with rated output(8ohms) and
warm up Power Transistor and Heat Sink. Set input off.
Step Coupling
1
X-1297-01 PCB R641
2
X-1297-01 PCB R642

Safety Caution

Cautions during Inspection and Repair
1. Keep in mind the safety warnings
The safety instructions are shown as the labels or printings on the exterior, the
inside chassis or the parts, etc. Refer to the instructions when proceeding with
inspection or repair.
2. Use only the specified parts for replacement
The selected parts are used at critical area to reduce fire hazard or electrical
shock. So when replacing these parts where designaged with
※ marks on the schematic diagram or the parts list, ensure to use only the
same parts.
3. Ensure to dress back the AC (Mains) cord to the original position
If for some reason, the AC cord is moved or partially disassembled, ensure to re-
route or assemble back to the original position. The AC cord area is protected and
secured by tubing and insulation materials for the sake of safety, so that no loose
wire will touch and cause fire hazard and electrical shock.
4. Check for safety aspects after inspection or repair
Ensure all parts, such as screws or wires, removed during inspection or repair are
secured back to the original positions, and check visually for any anomaly. Also
check for any electrical leakage or resistance to maintain the safety.

Case Outlines

2 SA13 45
2 SC3 39 9
2S B 631K
2SA 101 6K
2S A 1209
2SA 137 6A
2S D1953
2S A 1667
2SC 53 6K
2S D600K
2SC 23 62 K 2S C4381
2S C2911
2SC 34 78 A
2SC 37 08
2SD 86 3
Adjust Adjust for
X-1297-03 PCB VR601
DC milli–voltmeter reads 5mV
X-1297-04 PCB VR602
marks or
2S B 81 7 2 S K 366 MP C 123 7H A
2S D 10 47
5

PCB Assembly

PC 81 7 B
L B1 6 4 1
NJM 78 XXFA
NJM 21 14 D H IN2 3 2C P
OPA2 60 4AP TC 74 HC 59 5AP
6
TC 91 6 3AN C XP82 8 32