Service manual

Service Modes, Error Codes and Faultfinding
Contents of this chapter:
1. Test points.
2. Service Modes.
3. Problems and solving tips (related to CSM).
4. ComPair.
5. Error codes.
6. The 'blinking LED' procedure.
7. Protections.
8. Repair tips.
Test Points
The chassis is equipped with test points in the service printing. These test points refer to
the functional blocks:
• A1-A2-A3, etc., for the audio processing circuitry [diagrams A5, A6, A7 and B6]
• C01-C02-C03, etc., for the 3D comb interface panel [C0]
• C1-C2-C3, etc., for the control circuitry [B7]
• F1-F2-F3, etc., for the frame drive and frame output circuitry [A4, B4]
• F1F-F2F, etc., for the RGB signals on the CRT panel [F]
• I1-I2-I3, etc., for the intermediate frequency circuitry [A7, B2]
• L1-L2-L3, etc., for the line drive and line output circuitry [A3, B4] and Double
Window [C]
• N1-N2-N3, etc., for the Jack high definition interface panel [N]
• P1-P2-P3, etc., for the power supply [A1, A2]
• S1-S2-S3, etc., for the feature box circuitry [B3]