Sega Game Gear TV Tuner PAL Service Manual
The Service Manual for the TV Tuner Pack (PAL) for Game Gear is Sega Enterprises, Ltd.'s own 36-page service manual for the Game Gear TV Tuner accessory, covering three PAL models: MK-2101-05 (I, PAL — England), MK-2101-18 (B/G, PAL — Germany) and MK-2101-20 (B/G, PAL — general Europe).
The scan carries a text layer.
General specifications, as printed
- Receiving channels: VHF 1–12, UHF 21–69
- Operating temperature range: +5 °C to +40 °C
- Storage temperature range: −20 °C to +60 °C
- Dimensions: 107.2 (H) × 120 (W) × 39 (D) mm
- Weight: 140 g without batteries
Contents
| Section | Page |
|---|---|
| Specifications | 1 |
| Disassembly and assembly procedure | 4 |
| Block diagram | 6 |
| Adjustment and alignment — general description | 7 |
| 1. System voltage inspection (PCB-2) | 8 |
| 2. Video IF alignment and AFT alignment (PCB-2) | 9 |
| 3. RF AGC delay alignment (PCB-2) | 10 |
| 4. Tuning dial calibration (PCB-2) | 11 |
| 5. Gradation alignment and brightness alignment (PCB-1) | 12 |
| 6. PLL alignment (PCB-1) | 13 |
| 7. RGB phase alignment | 14 |
| Troubleshooting chart | 15 |
| PCB top and bottom views | 23 |
| Electrical parts list |
What this manual settles
- The TV Tuner is an alignable analogue receiver, not a digital accessory. There are seven separate alignment procedures, and a recapped or repaired tuner that has not been re-aligned will not work correctly. This is the only document on this wiki with a Sega alignment procedure of this kind.
- It is two boards, PCB-1 and PCB-2, and every alignment step names which one it applies to.
- The designators are blocked per board, not interleaved across the unit: the parts list runs C01, C7, C20–C22, then C101–C105, C201–C224, C401–C410, C701–C720, C803 onwards. A designator without its hundreds digit is meaningless here.
- It is PAL only, and region-specific within PAL — the three model numbers differ in their broadcast standard, so alignment figures are not interchangeable between them.
What this manual does not contain
- No NTSC tuner coverage.
- No Game Gear console content. The handheld itself is covered by the Sega Game Gear Maintenance Manual (1992) and the Sega Game Gear VA1 Service Manual.
- No tuner-module internal data — the can is treated as a part.
A note on Game Gear coverage here
This wiki has no machine-style article for the Game Gear — no overview page, no maintenance guide, no troubleshooting guide and no capacitor replacement guide. The three Game Gear documents hosted here are therefore the only Game Gear material on the site, and they are not cited by any article. If Game Gear pages are written later, these are the sources they should be built from.
- Sega Game Gear Maintenance Manual (1992)
- Sega Game Gear VA1 Service Manual
- Sega Game Gear TV Tuner PAL Service Manual